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New Holland CX720, CX740, CX760, CX780, CX820, CX840, CX860, CX880. Operator's Manual - page 9

SECTION 3 - FIELD AND SITE OPERATION

Grain tank unloading auger

Cover plates are fitted over both grain tank unloading

augers. These cover plates are fitted with plates 1

which can be adjusted to regulate the unloading rate

according to the nature and moisture content of the

grain being handled.

Raise the plates to increase the unloading rate and

lower them to reduce it.

145

To clean the grain tank open both unloading auger

covers 2.

146

WARNING

Always disengage the unloading auger drive, turn off

the engine and remove the ignition key, before

removing the auger access cover.

To clean the vertical auger of the unloading tube open

cover 3.

147

To check or clean the vertical auger of the unloading

tube open the inspection cover 4.

148

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SECTION 3 - FIELD AND SITE OPERATION

Unloading tube swing

A warning light is provided in the cab (SSM) to warn

the operator when the unloading tube is not in the fully

closed position as this may be an operating hazard in

fields with trees, high tension wire pylons, telegraph

poles, etc.

NOTE: Wait 5 seconds to swing out the unloading

tube, after starting up the engine.

Unloading mechanism

To engage the unloading mechanism press the

unload engagement button (first time) on the multi

function handle.

To disengage press again the unload button (second

time) or:

• Depress the emergency stop button.

• Select the road mode with the road mode selector

switch.

The unloading system drive is protected by a

shearbolt 1.

Spare shearbolts 2 are located above the sprocket.

NOTE: If repetitive shearbolt failures occur, adjust

cross auger covers down.

149

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SECTION 3 - FIELD AND SITE OPERATION

STRAW HANDLING

Straw chopper (if installed)

They are two type’s of straw choppers available:

• Small grain chopper with

4 rows of straight

knives. (Not suitable for working in maize)

• Heavy duty chopper:

- with 4 rows of bevelled knives.

- with 6 rows of bevelled knives.

(maize chop kit can be installed when working in

maize)

150

NOTE: Always stop the engine and wait until the

chopper rotor has come to a complete standstill

before working on the straw chopper.

Engaging of the straw chopper

The straw chopper starts when engaging the

threshing mechanism, if clutch

1 manually is

engaged.

NOTE: 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 the public road.

151

NOTE: With the engine and the threshing

mechanism running, deflector plate in the chopping

position and the straw chopper not yet engaged

(manually) an alarm is given on the InfoViewt

display (+buzzer).

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SECTION 3 - FIELD AND SITE OPERATION

Chopping cereals

For chopping cereals, proceed as follows:

1. Install the drive belt at high rpm speed of the

chopper rotor.

152

2. Adjustment of the counter knives: Loosen nuts 1

on both sides to move the counter knives more or

less in the rotor chamber.

• Counter knives:

- Fully engaged: For very fine chop quality.

- Approximately halfway: Damp heavy straw.

- Fully retracted: Dry straw (easy to chop)

153

• Shread bar 1: In easy chopping conditions or

if chop quality is not important, the shread bar

can be mounted underneath the chopper

body. (see fig. 157)

154

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SECTION 3 - FIELD AND SITE OPERATION

Chopping maize

For chopping maize, proceed as follows:

1. Install the drive belt at low rpm speed of the

chopper rotor.

155

2. Remove shread bar 1 by loosening the bolts.

156

3. Install shread bar 1 underneath the chopper body.

157

4. To keep the counter knives in good conditions for

the next cereal harvest is it better to remove the

counter knife bar by loosening nut 1 on both

sides.

158

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SECTION 3 - FIELD AND SITE OPERATION

5. Remove bolts 1 to reduce the rotor knives by

halve.

159

6. Install the deflector plate in maize configuration,

to protect the straw walkers.

To do this job, proceed as follows:

1. Set the deflector plate in the chopping position.

2. Turn screws 1 on both sides to open plate 2.

160

3. Unlock handle 4 and move them out of the holes

on both sides of the straw hood.

161

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SECTION 3 - FIELD AND SITE OPERATION

4. Install plate 3 in the maize configuration and lock

with handles 4 into the holes foreseen on both

sides in the straw hood.

162

Straw chopper spreader chute

The spreader chute can be set in 7 different positions.

To adjust, use the handle on the right-hand side.

The straw chopper spreader chute 1 must remain in

the highest position (as shown) when driving on

public roads and also when the combine is pulling a

header trailer.

IMPORTANT: The spreader chute 1 must be up for

chopping and down for swathing.

163

Spread pattern

The spreader chute is foreseen with left and

right-hand side dividers that can be adjusted for

varying spreader widths, depending on the header

width.

To adjust, proceed as follows on both sides:

• Loosen nut

1 and move with handle 2 the

left-hand side dividers. Fix with nut 1.

164

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SECTION 3 - FIELD AND SITE OPERATION

Remote controlled divider plates (if installed)

With a selector switch from the cab it is possible to

move electrically the divider plates of the spreader

chute from left to the right and from right to the left,

depending on the wind direction and side slope.

165

Lift the swath plate up and block it with support 1 to

clean or service the chopper deflector plate.

166

Rotor knives

• Chopper rotor with 4 rows of knives.

CX700 models (56 hingeable rotor knives)

CX800 models (68 hingeable rotor knives)

• Chopper rotor with 6 rows of knives.

CX700 models (76 hingeable rotor knives)

CX800 models (92 hingeable rotor knives)

NOTE: Do not operate with broken or damaged

knives. This is unsafe and the unbalance may cause

severe secondary damage to the chopper and the

combine.

To replace the rotor knives, loosen lock nut 1 and

remove the washers, spacers and old knives.

When install the new knives, apply oil on the bushings

and the knife bores.

Check if the spacer is inserted with the small end into

the knife and the large end into the support.

167

Tighten locknut 1 with a torque of 79 Nm. (58 ft.lbs)

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SECTION 3 - FIELD AND SITE OPERATION

Counter knives

CX700 models: 28 counter knives

CX800 models: 33 counter knives

To remove, proceed as follows:

1. Remove hair pin 1.

168

2. Pull bar 2 out to change the counter knives.

To install, proceed in reverse order.

169

Swath-forming position

Adjust the deflector plate with handle 3 in swath

position.

170

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SECTION 3 - FIELD AND SITE OPERATION

Baffle plate

The baffle plate (1) can be set in two positions:

• The front position (3) retains material longer and

give a fine chop.

• The rear position (4) gives a slightly longer chop,

but reduces power consumption and knife wear.

171

To change the position of the baffle plate (1), proceed

as follows:

On both sides:

1. Loosen the bolt (2) and remove the bolt (3).

2. Install the bolt (3) in position (4) and tighten the

bolts.

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SECTION 3 - FIELD AND SITE OPERATION

Chaff blower (if installed)

The chaff blower blows all the material coming from

the cleaning shoe into the straw chopper, to spread

the chaff evenly across the full cutting width of the

combine.

Remove the blower when threshing maize or

sunflowers.

172

CAUTION

Do not use the chaff blower without engaging the

straw chopper.

After disengaging the threshing mechanism, the

chaff blower will continue to run for 15 seconds before

disengaging to evacuate the remaining material.

Never disconnect the hydraulic couplers without

remove the chaff blower completely.

To remove the chaff blower proceed as follows:

1. Disconnect the hydraulic quick-couplers 1 of the

blower.

173

2. Connect the quick coupling as shown.

IMPORTANT: Avoid possible oil contamination by

properly fitting the blanking plugs into the hydraulic

quick couplers.

174

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SECTION 3 - FIELD AND SITE OPERATION

3. Open deflector plate 2 of the chaff blower.

4. Remove two hair pins 3 to open the locks.

5. Remove box 4 completely.

175

6. Remove three bolts 5 on both sides.

7. Remove two bolts 6 on both sides to remove the

chaff blower.

176

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SECTION 3 - FIELD AND SITE OPERATION

Chaff spreader (if installed)

A chaff spreader can only be installed if the combine

is equipped without chaff blower and without straw

chopper to spread the chaff directly to the sides down

the ground.

CAUTION

Keep well clear off the chaff spreader at all times.

CAUTION

Never operating with an unbalanced chaff spreader.

Imbalance can cause damage on chaff spreader and

combine.

The chaff spreader has two positions:

• Forward position: For spreading the chaff into the

straw.

177

• Service position: To service or remove the sieves.

CAUTION

Always disengage the threshing mechanism and stop

the engine before working on the chaff spreader.

Wait until all the rotating parts come to a complete

standstill before working on the chaff spreader.

IMPORTANT: During field operation, the chaff

spreader must never be located in the service

position, even when it is not being used, as chaff

accumulation under the straw walkers may occur!

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SECTION 3 - FIELD AND SITE OPERATION

Automatic rotation trailer hitch (If installed)

When your machine is equipped with a automatic

rotation trailer hitch, the following needs to be

respected.

CAUTION

For safety raisons , when not in use, close always the

hitch by pulling lever 1 down as shown in figure 178.

1. When attaching a trailer, pin 2 jumps down when

the lever 3 is pressed by the hook of the trailer.

2. The pin 2 is only closed perfectly when pin 4 is

completely in.

178

To open the hitch, proceed as follows:

1. Make sure that the combine and the trailer are

standing level and in one line and there is no

pressure between pin 2 (fig. 178) and the trailer

coupling.

2. To open the hitch, pull lever 1 upwards.

(pin 3 is coming out)

179

NOTE: To obtain a good working of the hitch, clean

and grease the hitch regularly.

IMPORTANT: The permitted vertical load and the

trailer weight is mentioned on a plate located on the

trailer hitch support.

3-93

CX720 CX820

CX740 CX840

CX760 CX860

CX780 CX880

OPERATOR’S MANUAL

Volume 2/2 - Maintenance

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