New Holland TX62, TX63, TX64 Plus, TX65 Plus, TX66, TX67, TX68, TX68 Plus. Operator's Manual

FIELD OPERATION

Units with flex header control printed circuit

Type

Header

Ground speed

Returns

Date & Time

• Language

• Reel speed synchro

•

Ground speed con-

•

Return cap constant

• Date & Time

gain

stant

• Chopper

•

Cal return

• Cal/Set Complete

• Header width

•

Cal/Set Complete

• Lateral float

•

Cal/Set Complete

Cal. lateral float

• Cal. header height

• Right return

• Flex header installed

• Units

• Cal/Set Complete

• Max engine RPM

• Cal. engine RPM

• Cleaning shoe

• Cal. concave

• Set contrast LCD

• Cal/Set Complete

4-106

SECTION

SPEED CONTROL MODULE

Channel Function

Threshing drum

Cleaning fan

Clean grain cross auger and elevator

Beater

Not used

Straw chopper

Returns auger (left-hand side

Returns auger (right-hand side)

Straw walkers

Straw walker blockage

Rotary separator

The determination of the maximum shaft speeds is

based on a 5 seconds measuring period.

51515

160

This period starts when:

- after ignition, the engine runs for the first time

at full throttle with the threshing mechanism

engaged, or

- each time the engine runs at full throttle with

the threshing mechanism engaged and pres-

sing the

key of the Infoview monitor.

This speed determination has to be performed each

time the threshing drum and/or cleaning fan

speed has been changed.

All warning lights will blink as long as the automatic

maximum shaft speed level determination is in opera-

tion (5 seconds).

If the combine is equipped with a straw chopper and

the chopper is off during the automatic maximum

shaft speed level determination, then the maximum

speed of the straw chopper is determined the first

time the chopper is engaged and the engine runs at

full throttle.

If a warning light starts to glow during operation and

the acoustic signal functions, the rpm of the corre-

sponding shaft is no longer correct (i.e. slowdown of

speed due to belt slippage, broken belt, etc.). In this

case, stop the machine immediately and investigate

the cause of the problem.

4-107

FIELD OPERATION

DIFFERENTIAL LOCK [if installed]

When operating in slippery or muddy ground condi-

tions the differential lock may be engaged to provide

better traction.

If one of the traction wheels starts spinning, immedi-

ately depress the differential lock pedal. Now both

traction wheels will turn at the same speed. Keep the

pedal depressed until the machine has passed the

obstacle.

Release the pedal to disengage the differential lock.

IMPORTANT:

S Do not make turns with the differential lock

pedal depressed.

S It may be necessary to slow down the com-

bine to allow engagement of the differential

lock.

STRAW CHOPPER [if installed]

TRANSPORT POSITION -- Figures 161 and 162

For road transport, the chopper chute A must remain

in the operating position as shown, except when a

header trailer is attached. In this case, chute A should

be swung up completely.

To swing chute A up, disengage latch B, swing chute

A completely up as shown and lock latch C.

CHOPPING POSITION -- Figures 161 and 162

30351

161

1. To change to the operation position, disengage

latch C, swing chute A down and secure it with

latch B.

CAUTION:

Never swing the chute up during or just

after operation as the chopper continues

to rotate for considerable time.

Never engage the chopper with the chute

swung up!

4-108

SECTION 4

NOTE:

Latch B has two positions to secure the

spreader depending on the spread patterns re-

quired:

Position 1:

Narrow spread pattern

Position 2 :

Wide spread pattern

Move the straw guiding plate to the front (i.e. the

chopping position) with lever D.

NOTE:

30346

The lever position is parallel to the plate posi-

tion.

162

Adjust the straw chopper chute deflector plates

according to the header width.

Loosen bolts J and adjust with levers K.

SWATH-FORMING POSITION -- Figure 162

Move the straw guiding plate to the rear with lever D.

STRAW CHOPPER OPERATION

CAUTION:

Keep yourself and other people away

from the rear of the combine when the

straw chopper is engaged and operating.

Do not use the straw chopper near the

end of the field if there is a risk that crop

or stones can be projected onto a public

road.

With the engine running at idle speed and the thresh-

ing mechanism running, engage the chopper drive

with switch 44 (Section 2, Fig.10).

4-109

FIELD OPERATION

NOTE:

S With the engine and the threshing mecha-

nism running, straw guiding plate E in the

chopping position and the straw chopper

not yet engaged, the horn should sound!

S The chopper clutch is automatically disen-

gaged when the threshing mechanism is

disengaged.

CAUTION:

Always stop the engine before working

on the straw chopper.

ACCESS TO THE STRAW CHOPPER ROTOR --

Figures 161 and 163

In case a blockage occurs or repairs are needed, ac-

cess to the straw chopper can be gained as follows:

1. Move the straw guiding plate E to the rear with le-

ver D (Fig.161).

2. Open latch H on both sides, pivot access door F to

the front and secure the door with rod G.

30353

163

CHOPPER KNIVES - Figure 164

The knives V on the chopper rotor have two cutting

edges.

CAUTION:

Do not operate with broken or damaged

knives. This is unsafe and the imbalance

may cause severe secondary damage to

the chopper and the combine.

30350

164

Whenever needed, the knives can be reversed or ex-

changed.

4-110

SECTION 4

Proceed as follows:

1. Remove bolt W, taking care not to lose the two

spacers and washers.

2. Turn the knife or install a new one.

3. Insert bolt W from the right-hand side (facing the

direction of travel).

4. Tighten nut Z to a torque of 64 Nm.

COUNTER KNIVES -- Figure 165

The counter knives must be set as follows:

Crop and/or

Counter knife

Posi-

condition

setting

tion

Dry straw

Fully advanced

Damp crop:

Towards the rear:

S Heavy straw

S Approximately

halfway

S Oil seed rape,

S Fully retracted

peas and beans

30347

Maize and sun-

Remove knives

165

flower

completely

(one by one)

To reposition the counter knives, loosen nuts A on

both sides, move the counter knives bar to the desired

position with lever B and retighten nuts A.

REPLACEMENT OR REMOVAL OF THE COUNT-

ER KNIVES -- Figures 165 and 166

To remove the counter knives, proceed as follows:

1. Set the counter knives in position 1 using bolts A

55149

on both sides.

166

2. Remove nine bolts U and cover T.

The counter knives can now be pulled out one by one

for replacement or removal.

IMPORTANT:

Do not remove the counter knife block itself

when chopping maize.

4-111

FIELD OPERATION

CHOPPING QUALITY -- Figure 165

The chopping plate L can be set in three different posi-

tions with eccentric part M. The closer the plate L is

set to the rotor, the shorter the chopped straw will be.

Loosen bolts N on both sides, turn eccentric part M

into the desired position and make sure notch P is

onto stop Q.

Tighten bolts N.

CHOPPING MAIZE -- Figure 167

For chopping maize, proceed as follows:

1. The rotor speed must be reduced by installing a

larger pulley onto the hub of the rotor shaft. This

pulley is part of the straw chopper slow down kit

which is available as an accessory.

2. The chopping plate L must be turned 180_ so that

the flat side is on the inside.

Remove bolts N on both sides and turn chopping

30354

plate L.

167

3. Set rear plate R into the forward position using

bolts S on the inside.

4. Loosen bolts U and remove cover T. Remove

counter knives V one by one.

STRAW CHOPPER CLUTCH

When the clutch fails it must be repaired or replaced

as soon as possible. Legislation no longer allows to

temporarily lock the clutch in the engaged position be-

cause of the safety hazard created when the straw

chopper knives rotate whenever the engine is running

(even with the threshing mechanism disengaged).

4-112

SECTION 4

CHAFF SPREADER [if installed] -- Figures

168 to

173

OPERATING POSITIONS

The chaff spreader has four positions:

S Forward position: Spreading position

S Vertical posiiton:

- Control of grain losses

- Maize harvesting position

43204

S Rear position: Setting of sieve position

168

S Swing-up position to remove the sieves.

IMPORTANT:

The rear position and swung-up position are

not allowed during field operation.

The vertical position is shown in Figure 168.

CAUTION:

When the combine engine is running, the

chaff spreader is automatically engaged

when the threshing mechanism is enga-

ged.

Always disengage the threshing mech-

43206

anism and stop the engine before work-

169

ing on the chaff spreader.

To change position, proceed as follows:

1. Press spring-loaded knob L.

2. Move the chaff spreader into the desired position

with handle H.

3. Release spring-loaded lever L and move the chaff

spreader until lock A jumps into the groove.

4-113

FIELD OPERATION

It is possible to adjust the distance between the

sieves and the chaff spreader in the forward postion.

Four distances are available.

To change the distance, proceed as follows:

1. Set the chaff spreader into the vertical position.

2. Remove two bolts R.

54779

3. Reinstall bolts R into position 1-1, 2-2, 3-3 or 4-4

170

(position 1-1 gives the closest position between

the sieves and the chaff spreader).

4. Set the chaff spreader into the forward position.

DISENGAGING AND REMOVING THE

SPREADER

When not using the chaff spreader or when harvest-

ing maize, remove belt T and leave the chaff spreader

in the vertical operating position.

IMPORTANT:

During field operation, the chaff spreader must

never be located in the swung-up position,

43207

even when it is not being used, as chaff accu-

171

mulation under the straw walkers may occur!

If too much chaff builds up, the spreader can be re-

moved.

Proceed as follows:

1. Remove belt T (Fig.171).

2. Remove knob L (Fig.168).

3. Remove four bolts B (Fig.169) on the right-hand

43203

side.

172

4-114

SECTION 4

4. Remove two bolts C (Fig.172) on the left-hand

side.

CAUTION:

The chaff spreader is heavy, use a lifting

device of adequate capacity.

5. Remove chaff spreader plate P by loosening bolts

D on both sides.

43210

173

AIR CONDITIONING

The air-conditioning system must only be operated

after the combine engine is warm and the interior of

the cab is 15° C minimum.

ATTENTION:

Ignoring this precaution may cause damage to

the system.

NOTE:

If the ambient temperature is around 15° C,

the low pressure warning light may light up.

This warning is generated by the low ambient

temperature and may be ignored.

4-115

FIELD OPERATION

COMBINE PERFORMANCE CHECKS

KILL-STALL

11. With all previous factors considered, readjust the

combine.

The only way to accurately check the performance of

the combine is to complete a ‘‘kill-stall’’.

NOTE:

Make only one adjustment at a time so that any

1. Operate the combine in a section of the field that

change in combine performance can be

best represents the overall crop. Be sure the

attributed to that particular adjustment.

combine is at least 100 m into the crop and travel-

ling at the normal operating ground speed.

2. Press the top part of the engine reset switch 51

(section 2, Fig.10), apply the brakes gently and

allow the complete combine to stop. This will

PERFORMANCE INDICATORS

leave crop material as it was during actual har-

vesting.

There are four indicators which will tell you how well

the combine is performing. These four indicators are:

3. Disengage the threshing and header engage-

ment system clutch, move the hydrostatic speed

S Grain tank sample

control lever to neutral, move the throttle control

to the low position and restart the engine immedi-

S Distribution of material on the grain pan and upper

ately. This prevents the engine from overheating

sieve

and from being damaged. Allow the engine to

slow idle for five minutes before stopping the en-

S Type and amount of returns

gine.

S Losses

4. Check the grain tank sample for complete thresh-

ing, cleanliness and damage.

By correctly reading these indicators and being famil-

iar with the combine, you can make the necessary ad-

5. Walk out in front of the header and check the crop

justments to correct any problem and improve the

loss before the header has contacted the crop

overall combine performance.

(preharvest loss).

6. Check the crop loss in an area where only the

header has travelled (header loss).

7. Check the distribution of material on the grain

pan.

8. Check the type, amount and distribution of mate-

GRAIN TANK SAMPLE

rial on the sieves.

A large amount of trash in the grain tank indicates the

9. Check the type and amount of returns.

crop is being overthreshed and/or the cleaning fan

speed is too slow. The first step to correct this prob-

10. Check the total loss in a 60 cm wide area across

lem is to increase the concave clearance and/or re-

the width of the cleaning shoe. Subtract prehar-

duce drum speed. This reduces or eliminates the ma-

vest and header losses to determine the machine

terial break-up caused by overthreshing. Then in-

loss.

crease the cleaning fan speed if the trash is heavier

Use a drop screen to check the machine loss di-

than the grain or close the upper sieve if the trash is

rectly.

larger than the grain.

4-116

SECTION 4

Cracked or damaged grain can be caused by a con-

The front third of the upper sieve should be com-

cave setting that is too close to the drum. Increase the

pletely clean. The middle third should have some

concave clearance and then reduce the drum speed

grain but mostly residue. The rear third of the upper

to correct the problem.

sieve should have only residue.

Bunch feeding can cause grain damage in the straw

If there is some grain on the rear third of the upper

elevator. An incorrect straw elevator chain tension

sieve, returns will be increased and there is a possibil-

can also cause grain damage.

ity that grain will ride out the back of the combine.

Open the upper sieve to allow more of the grain to fall

Excessive returns will contribute to grain damage due

onto the lower sieve.

to the additional pass(es) the grain must take through

the drum/concave area. Plugged concaves can

If the material on the upper sieve is broken into small

cause grain damage because the free grain cannot

pieces, the crop is being overthreshed. This can plug

get out of the concave area.

the upper sieve and cause high losses. Increase the

concave clearance and/or reduce drum speed to de-

Loose elevator chains can also cause grain damage.

crease the threshing action.

It is important to maintain the proper tension on these

chains.

Unthreshed heads indicate the drum speed should be

increased and/or the concave clearance should be re-

Unthreshed material in the grain tank can be caused

duced. Unthreshed heads can also be caused by

by underthreshing or the lower sieve that is opened

worn rasp bars and worn concaves.

too wide. Increase the drum speed and reduce the

concave clearance as needed to correct the problem.

Also close the lower sieve slightly to obtain a cleaner

grain tank sample.

RETURNS SAMPLE

It is normal for the returns sample to contain a few un-

threshed heads. The purpose of the returns system is

to return unthreshed heads to the threshing area for

GRAIN PAN / UPPER SIEVE DISTRIBUTION

another pass. However, a large quantity of un-

threshed heads indicates the concave clearance is

The distribution of material on the grain pan affects

too great.

the distribution of material on the sieve. The distribu-

tion on the grain pan should be level to slightly higher

If the returns sample contains a large quantity of

directly under the drum and taper slightly towards

clean grain, the cleaning fan speed should be re-

both sides.

duced and/or the lower sieve should be opened more.

4-117

FIELD OPERATION

GRAIN LOSS MEASURING KIT -- Figure 174

(Part number 80456667 - can be ordered from your

local dealer).

LOSSES

Losses may occur at different stages:

Pre-combining losses (i.e. losses found in front

of the combine) are usually caused by adverse

20956

weather conditions, poor crop conditions and crop

174

maturity.

Header losses: (i.e. losses found behind the

header and outside of the tyres) may be caused by

improper header adjustments.

Leakage losses may be caused by damaged

seals or holes in bottom auger covers.

Shoe losses may be caused by a poor sieve ad-

justment, or low cleaning fan speed, or when

working on slopes (exceeding the capacity of the

sieve levelling system [if fitted]).

Fan losses are caused by an excessive cleaning

fan speed.

Straw walkers losses. These can be unthreshed

ears (underthreshing) or grains, due to poor ad-

justment of drum and concave or excessive

ground speed.

4-118

SECTION 4

HOW TO USE THE KIT

Total losses caused by the machine:

1. Walk beside the combine in operation and throw

Lt = (b + c) + (d + e) + f - a

the tray under the centre of the cleaning shoe.

CAUTION:

When checking losses, the straw chop-

per or spreader drive must be disenga-

Functional losses

ged.

Lf = d + e + f

The person throwing the tray must make

sure he cannot be trapped by the steering

wheels.

To check functional losses [cleaning shoe, fan and/

or straw walker loss(es)], the grain loss measuring kit

2. After the combine has passed, take the tray and

can help in determining loss levels.

count the grains in the tray.

3. Use the slide calculator (Figure 175) to convert the

quantity of grains into kilogrammes per hectare.

KIT CONTENTS

The grain loss measuring kit contains:

3 trays (according to machine width)

S A slide calculator

S An instruction booklet

4-119

SECTION 4

HOW TO OBTAIN AN IDEA ON LOSS LEVEL --

Figure 177

Example:

Model TX66 with 17 ft (5.10 m) grain header operating

in wheat.

Average yield: 5000 kg/ha.

50399

177

-- Surface P = surface being harvested:

-- Considering the average weight of wheat being

1 meter multiplied by X (header width) = 5.1 m².

23,000 grains/kg, this means: 586 grains in sur-

face Q (1 % loss level!).

-- Surface Q = surface of the material being cut in

surface P, behind the machine (i.e. swath):

-- An average human hand with spread fingers cov-

1 meter multiplied by Y (drum width, i.e. 1.5 m) =

ers a surface of approximately 0.03 m^2. This

1.5 m².

means that, if the grain loss is evenly spread, 18

-- Consider a loss level of 1% = 50 kg/ha or 5

grains can be found underneath the hand, repre-

grams/m² crop.

senting 1% grain loss for a 5000 kg/ha yield.

Surface Q will then contain the functional losses

(i.e. cleaning shoe, straw walker, fan) of surface P

(5.1 m²), being 5 x 5.1 = 22.5 grams.

4-121

SECTION 4

SUMMARY OF THE MACHINE SETTINGS FOR DIFFERENT CROPS

Concave position

TYPE OF

Optional

Drum

•

TX62-63

equipment

speed

CROP

•

TX64PLUS to TX68PLUS

required

•

Clearance at 2nd and

8th bar

•

De-awning plates

•

2nd position

WHEAT

700-1100 rpm

•

10 mm

•

Rasp bar in front of

concave (varieties

•

10/10 mm

with white caps)

•

1st or 2nd position

•

De-awning plates

•

10 mm

BARLEY

800-1000 rpm

(some varieties)

•

10/10 mm

•

1st or 2nd position

•

Idem Barley

WINTER

800-1000 rpm

•

10 mm

BARLEY

Close de-awning

•

10/10 mm

plates, if necessary.

•

2nd or 3rd position

RYE

1000 rpm

•

10 mm

•

10/10 mm

•

2nd or 3rd position

TRITICALE

700-1000 rpm

•

10 mm

•

10/10 mm

•

2nd position

•

10 mm

OATS

800-1000 rpm

•

10/10 mm

•

Stone trap cover plate

•

Antiwrap shields on

•

4th position

straw elevator upper

RICE

650-1000 rpm

shaft

•

20 mm

•

Spike tooth bars

and concave

•

20/25 mm

•

Tracks

•

Maize header

•

7th position

400-500 rpm

•

Maize concave

MAIZE

•

25 mm

In dry conditions, use

•

Smooth roto-

a speed reducer

•

25/30 mm

thresher covers

(250-400 rpm)

•

1st or 2nd position

Antiwrap shields on

FLAX

800-1000 rpm

•

10 mm

straw elevator upper

shaft

•

10/10 mm

4-123

FIELD OPERATION

Sieve openings

Beater

Rotary

Fan

equipment

separator

speed

Upper

Lower

Presieve

Blades

760 rpm

900 rpm

Open

3 -- 5 mm

6 mm

Blades

760 rpm

700 rpm

10 -- 12 mm

3 -- 5 mm

6 mm

Blades

760 rpm

750 rpm

10 -- 12 mm

3 -- 5 mm

6 mm

Blades

760 rpm

700 rpm

10 -- 12 mm

3 -- 5 mm

6 mm

Blades

760 rpm

700 rpm

10 -- 12 mm

3 -- 5 mm

6 mm

Blades

760 rpm

550-600 rpm

10 -- 12 mm

3 -- 5 mm

6 mm

Teeth

760 rpm

650 -700 rpm

10 -- 12 mm

3 -- 5 mm

6 or 9 mm

(10 rakes)

Maize sieve

Hart Carter

Teeth

400 rpm

800-920 rpm

(Hart Carter

9 or 12 mm

1-1/8’’sieve

(5 rakes)

1-5/8’’)

10 mm

12 mm

Blades

760 rpm

500-550 rpm

4 -- 7 mm

2 -- 4 mm

3 or 6 mm

4-124

SECTION

Concave position

TYPE OF

Optional

Drum

•

TX62-63

equipment

speed

•

TX64PLUS to TX68PLUS

CROP

required

•

Clearance at 2nd and

8th bar

• Graepel sieve ex-

•

3rd to 6th position

tension

RAPE SEED

600-650 rpm

•

24 mm

• Smooth roto-thresher

covers

•

24/24 mm

•

3rd position

700 rpm

•

17 mm

GRASS SEED

•

17/19 mm

•

Perforated auger covers

•

4th to 6 th position

•

Smooth roto-thresher

•

Beans:

27 mm

BEANS/PEAS

covers

400-450 rpm

27/27 mm

•

Perforated straw eleva-

Peas:

20 mm

tor bottom

20/20 mm

•

1st position

Close de-awning

CLOVER

Maximum

•

3 to 5 mm

plates, if necessary

•

3 to 5 mm, paral-

lel with drum

•

2nd position

Special crop lifters

SORGHUM

800 rpm

•

10 mm

on the header

•

10/10 mm

•

4th to 6th position

SAFFLOWER

300-550 rpm

•

27 mm

•

27/27 mm

•

Superflex header

•

Smooth roto-thresher

•

4th or 5th position

covers

SOYA BEANS

Minimum

•

20 mm

•

Maize concave

•

Perforated auger covers

•

20/25 mm

•

Perforated straw

elevator bottom shaft

300-550 rpm

•

4th to 6th position

SUNFLOWER

Smooth roto-thresher

In dry conditions,

•

27 mm

covers

speed reducer is

necessary

•

27/27 mm

•

3rd to 5th position

•

10 to 25 mm

MUSTARD

600-650 rpm

•

10/10 mm to

25/25 mm

•

2nd position

BUCKWHEAT

600 rpm

•

10 mm

•

10/10 mm

4-125

FIELD OPERATION

Beater

Rotary

Sieve openings

Fan

equipment

separator

speed

Upper

Lower

Presieve

450 -- 500 rpm

Blades

400 rpm

8 mm

2 mm

6 mm

Eccentric shaft

low rpm

Blades

760 rpm

400

5 mm

3.5 mm

6 mm

or teeth

Teeth

400 or 760 rpm

Beans: 15 mm

Maximum

8 -- 12 mm

9 or 12 mm

Grate in lower

Peas:

10 mm

(5 rakes)

position

Blades

760 rpm

Minimum

8 mm

2 to 3 mm

3 mm

Blades

760 rpm

750 - 800 rpm

10 mm

5 m m

3 or 6 mm

Blades

400 rpm

550 -700 rpm

12 mm

7 mm

6 or 9 mm

Maize sieve

Blades

400 or 760 rpm

750 rpm

Hart Carter

9 or 12 mm

1-5/8’’

1-1/8’’

10 mm

6 mm

400 rpm

If losses occur:

Blades

600-650 rpm

760 rpm

10 -- 12 mm

6 -- 7 mm

12 mm

Grate in lower

position

450 - 500 rpm

Blades

400 or 760 rpm

8 -- 10 mm

0 -- 5 mm

3 or 6 mm

Eccentric shaft

low rpm

Blades

400 or 760 rpm

550 rpm

12 mm

8 mm

6 mm

4-126

SECTION 5

ADJUSTMENTS AND MAINTENANCE

nent described in this Section.

CAUTION:

Always stop the engine, unless other-

wise instructed, before checking and/or

adjusting any belt, chain or other compo-

DRIVE BELTS AND CHAINS

[left-hand side] -- Figure 1

IMPORTANT:

Daily check all belt and chain tensions to en-

sure optimum operation.

A maintenance schedule is mapped out at the

end of this Section.

30221

Header drive belt

8 Returns auger drive chain

Straw elevator and header engaging belt

9 Main drive belt

Unloading system engaging belt

10 Straw chopper front drive belt [if fitted]

Main engaging belt

Straw chopper rear drive belt [if fitted]

12 Chaff spreader drive belt [if fitted]

Cleaning shoe drive belt

13 Chaff spreader discs drive belt (not shown)

Eccentric shaft drive

Fixed cleaning shoe: belt drive

NOTE:

Self-levelling cleaning shoe: p.t.o. drive

Most belt idlers are spring-loaded and are fit-

Roto-threshers and returns cross auger drive

ted with an indicator plate to indicate the cor-

chain

rect belt tension.

5-1

ADJUSTMENTS AND MAINTENANCE

HEADER DRIVE BELT -- Figure 2

Correct belt tension:

X = 100 mm for 1HC belt

X = 155 mm for 4HB belt

Adjust with nuts A.

Y should be 0 mm. Adjust with nuts B.

30215

STRAW ELEVATOR AND HEADER ENGAG-

ING BELT

Models TX62-63 -- Figure 3

Models TX64PLUS-65PLUS-66-67-68-68PLUS --

Figure 4

Correct belt tension (in engaged position):

Spring length C = indicator plate length D.

Adjust with nuts E.

Adjust the belt guide F so that it is at a maximum

distance of 7 mm from the engaged belt, through-

55036

out the belt guide circumference.

TX62-63

Proceed as follows to check and adjust the ten-

sion of the straw elevator and header engaging

belt, of the threshing mechanism engaging belt

(item 4) and of the unloading system engaging

belt (item 3).

CAUTION:

For header, threshing and unloading

system:

Make sure nobody is near the combine

when disengaging the drive belt, even

when the engine is not running!

Make sure nobody is near the combine

when restarting the engineas somecom-

30214

ponents may rotate for a while.

TX64PLUS-65PLUS-66-67-68-68PLUS

5-2

SECTION 5

Proceed as follows per drive belt:

NOTE:

For models TX62-63, only steps 5 to 7 are ap-

plicable.

1. Start the engine.

2. Run the engine at maximum speed for a

short time.

3. Stop the engine.

4. Turn the key clockwise to the ignition posi-

55033

tion.

TX62-63

5. Only engage the drive belt to be checked

(one belt at a time!)

6. Check belt tension and adjust, if necessary.

7. Disengage the drive belt.

UNLOADING SYSTEM ENGAGING BELT

Proceed as described above.

Models TX62-63 -- Figure 5

30213

(underneath steering platform)

TX64PLUS-65PLUS-66-67-68-68PLUS

Correct belt tension (in engaged position):

Spring length R = indicator plate length S.

Models TX64PLUS-65PLUS-66-67-68-68PLUS --

Figures 6 and 7

Correct belt tension (in engaged position):

Notch of part H is visible just underneath block G.

Adjustment

1. Loosen lock nut J.

2. Adjust the spring tension by turning rod K so

that the notch in adjusting part H is just visible

underneath block G.

51910

3. Tighten lock nut J.

5-3

ADJUSTMENTS AND MAINTENANCE

MAIN ENGAGING BELT

Proceed as described in paragraph 2.

Models TX62-63 -- Figure 8

(underneath steering platform)

Correct belt tension (in engaged position):

Spring length L corresponds with the notch in

plate M.

Adjust with nut N.

55037

TX62-63

Models TX64PLUS-65PLUS-66-67-68-68PLUS --

Figure 9

Correct belt tension (in engaged position):

Spring length L = indicator plate length M.

Adjust with nut N.

30216

TX64PLUS-65PLUS-66-67-68-68PLUS

All Models

Adjust the belt guides P and Q so that they are at

a maximum distance of 7 mm from the engaged

belt, throughout the belt guide circumference.

30224

5-4

SECTION 5

CLEANING SHOE DRIVE BELT

S Self-levelling cleaning shoe -- Figure 11

Correct belt tension:

Spring length R = indicator plate length S.

Adjust with nut T.

S Fixed cleaning shoe -- Figure 12

Correct belt tension:

Spring length U = indicator plate length V.

Adjust with nut W.

21072

ECCENTRIC SHAFT DRIVE

S Self-levelling cleaning shoe -- Figure 11

Drive shaft halves A and B can only be con-

nected together in one position of the splines.

S Fixed cleaning shoe -- Figure 13

Correct belt tension:

Spring length C = indicator plate length D.

Adjust with nut E.

42938

42933

5-5

SECTION 5

DRIVE BELTS AND CHAINS

[right-hand side] -- Figure 21

30218

TX68

TX62-63-64PLUS -65PLUS -66-67-68PLUS

30219

30220

14 Unloading system drive chain

24 Cooling fan drive belt

15 Drum vari-drive belt

25 Rotary dust screen drive belt

16 Beater drive belt

26 Hydraulic pump drive belt

17 Grain storage drive belt

27 Alternator and air conditioning compressor drive

18 Grain elevator drive chain

belt (Model TX68)

19 Rotary separator drive belt

28 Alternator drive belt

20 Cleaning fan vari-drive belt

29 Air conditioning compressor drive belt (Models

21 Straw walker intermediate shaft drive belt

TX62-63-64PLUS-65PLUS-66-67-68PLUS)

22 Straw walker drive belt

30 Returns auger drive chain

23 Cooling system intermediate shaft drive belt

31 Straw Flow beater drive belt

5-9

ADJUSTMENTS AND MAINTENANCE

14 UNLOADING SYSTEM DRIVE CHAIN --

Figure 22

Tension the chain with sprocket Q.

42807

15 DRUM VARI-DRIVE BELT

a) Standard drum variator drive [if installed]

Figure 23

The tension of the drum vari-drive belt is cor-

rect when spring H is adjusted to the length

of the indicator plate G.

Checking variator adjustment

Start the engine and engage the threshing

mechanism. Move the drum variator to MINI-

MUM. Stop the engine.

Distance X should be minimum 1 mm (clear-

ance measured between driven sheaves).

Move the variator to MAXIMUM.

Distance Y should be minimum 1 mm (clear-

ance measured between drive sheaves).

5-10

SECTION 5

Adjustment

a) Variator on MINIMUM position:

The variator arms J should be against the

frame.

The factory setting of the (new) belt depth on

the drive sheaves is 105 mm and an initial

setting of eyebolt K is 56 mm.

If needed, i.e. if measurement X is less than

1 mm, adjustment can be carried out with the

lock nut on eyebolt K (moving the variator

arm J to the outside).

Inthecaseof astretchedbelt, thebelt canbe

allowed to extend 3 mm beyond the edge of

the driven sheaves.

b) Variator on MAXIMUM position:

The factory setting of the (new) belt depth on

the driven sheaves is 100 mm.

If necessary, i.e. if measurement Y is less

than 1 mm, adjust with nuts L and M (moving

the variator arm N to the inside).

In the case of a stretched belt, the belt may

be allowed to extend 3 mm beyond the edge

of the drive sheaves.

51588

5-11

ADJUSTMENTS AND MAINTENANCE

Torque-sensing drum variator

[if

Adjustment

installed] -- Figure

The drum variator belt is tensioned automati-

(i)

Variator on MINIMUM position:

cally according to the torque on the drum

shaft (“Torque-sensing drum variator”).

Move pivot block D against the frame.

Adjust nut K until a belt depth of 105 mm

on the intermediate shaft pulleys is ob-

tained or distance X measures minimum

1 mm. The initial setting of nut K is 56

Checking variator adjustment

mm.

Start the engine and engage the threshing

mechanism. Move the drum variator to

(ii)

Variator on MAXIMUM position:

MINIMUM. The variator arms J should be

against the frame. Stop the engine.

Move pivot block D towards nuts L and M

Distance X, which is the clearance between

until a belt depth of 100 mm on the drum

the driven sheaves, should measure mini-

shaft pulleys is obtained or distance Y

mum 1 mm.

measures minimum 1 mm.

Move the drum variator to MAXIMUM.

Tighten nut L and jam nut M against pivot

Distance Y, which is the clearance between

block D.

the drive sheaves, should measure mini-

mum 1 mm.

NOTE:

In both minimum and maximum posi-

In both minimum and maximum position

tion the variator belt should not pro-

the variator belt should not protrude more

trude more than 3 mm beyond the va-

than 3 mm beyond the variator sheaves.

riator sheaves.

5-12

ADJUSTMENTS AND MAINTENANCE

CLEANING FAN VARI-DRIVE BELT --

Figure 29

Checking

Start the engine and engage the threshing

mechanism.

Move the fan variator to MINIMUM.

Stop the engine and check clearance X between

the sheaves on the fan shaft.

Clearance X should be minimum 1 mm.

Move the fan variator to MAXIMUM.

Clearance Y should be minimum 1 mm.

Adjustment

Adjust with nut S or T.

The factory setting is:

S Maximum 54 mm belt depth on the driven

sheaves.

S Minimum 41 mm belt depth on the drive

sheaves.

In the case of a stretched belt, the belt loop

around the sheaves may be allowed to extend

maximum 3 mm beyond the edge of the sheaves.

51523

5-16

SECTION 5

Low speed fan variator [if installed] --

Figures 30 to 32

To change the variator sheaves and belt, proceed as

follows:

1. Start the engine and engage the threshing mech-

anism.

2. Set the fan variator on maximum speed.

3. Stop the engine.

43190

4. Install a restictor X so that the fan sheave, which

is spring-loaded, cannot move back.

5. Plug in connector C at the front railing and switch

on the parking lights.

6. Press switch K to open the variator and hold up

pawl P until the variator arms are free.

7. Remove pin Z and bolt B.

8. Remove the two sheaves Y and belt R.

9. Install the other sheaves and the belt.

10. Tighten bolt B to 50 Nm.

43191

11. Reinstall the variator arms and secure them in

place with pin Z.

12. Press switch K to close the variator while turning

the pulley by hand until it is possible to remove

restrictor X.

13. Plug out connector C.

14. Adjust bolts T and S as explained above under

subheadings ‘‘Checking’’ and Adjustment’’.

43192

5-17

ADJUSTMENTS AND MAINTENANCE

21 STRAW WALKER INTERMEDIATE SHAFT

DRIVE BELT -- Figures 33 and 34

The belt tension is correct when belt D can be de-

flected 14 mm at Z when applying a force of 17 N.

Adjust with rod V after loosening the three bolts

U. Loosen bolts W and adjust pulley A and its

support slightly downwards [forming an angle of

approximately 35° with the straight line between

the two pulleys -- front pulley upper side and rear

pulley lower side (view from the rear)], so that a

21082

clearance of 2 to 3 mm exists between both belt

halves. Retighten bolts W.

22 STRAW WALKER DRIVE BELT -- Figure 33

The belt tension is correct when the belt can be

deflected 5 mm when applying a force of 41 N

halfway between the pulleys at X .

Adjust with rod B after loosening bolts C.

Retighten bolts C.

NOTE:

Adjustments of the straw walker drive belt and

the straw walker intermediate shaft drive belt

42920

should be carried out together.

23 COOLING SYSTEM INTERMEDIATE SHAFT

DRIVE BELT -- Figure 35

Correct belt tension:

Spring length E = indicator plate length F.

Adjust with nut G.

54738

5-18

SECTION 5

24 COOLING FAN DRIVE BELT -- Figure 36

Spring-loaded idler L.

No adjustment needed.

54739

25 ROTARY DUST SCREEN DRIVE BELT --

Figure 37

Applying a force F = 1.8 to 3.5 N at the midpoint of

the belt should deflect the belt 13 mm.

Loosen nut K to adjust.

54740

26 HYDRAULIC PUMP DRIVE BELT -- Figure 38

Correct belt tension:

Models TX62-63-64PLUS-65PLUS-66-67

Applying a force of 3 daN at the midpoint of the

belt should deflect the belt 7.6 mm.

Loosen three nuts K and adjust with threaded rod

Models TX68-68PLUS

Applying a force of 2.7 daN at the midpoint of the

belt should deflect the belt 6.7 mm.

54741

Loosen three nuts K and adjust with threaded rod

5-19

ADJUSTMENTS AND MAINTENANCE

27 ALTERNATOR AND AIR CONDITIONING

COMPRESSOR DRIVE BELT

[Models TX68-68PLUS] -- Figure 39

Correct belt tension:

Applying a force of 3 daN halfway the belt be-

tween the engine pulley and the alternator will

deflect the belt 7 mm.

Adjust by moving the alternator held by two nuts

on the threaded rod K.

30223

TX68-68PLUS

28 ALTERNATOR DRIVE BELT

[Models TX62-63-64PLUS-65PLUS-66-67]

Self-adjusting idler, no adjustment needed.

29 AIR CONDITIONING COMPRESSOR DRIVE

BELT [Models TX62-63-64PLUS-65PLUS-66-67] --

Figure 40

Correct belt tension:

Applying a force of 2.3 daN at the midpoint of the

belt between the two pulleys should deflect the

belt 3 mm.

Adjust by moving the compressor in the slotted

holes L.

30222

TX62-63-64PLUS-65PLUS-66-67

5-20

New Holland TX62, TX63, TX64 Plus, TX65 Plus, TX66, TX67, TX68, TX68 Plus. Operator's Manual - page 6