New Holland Tractor Workmaster 50 / Workmaster 60 / Workmaster 70 / Tier 4B (final). SERVICE MANUAL

Clutch - Clutch mechanical release control

8. Remove split pin (1).

9. Disconnect linkage (2) from clutch cross shaft.

GNIL14TR00781AA

10. Similarly remove brake pedal spring (2) and discon-

nect all the linkages.

GNIL14TR00782AA

11. Jack-up rear left-hand side of tractor and remove

left-hand side rear wheel.

GNIL14TR04667AB

12. Pull out clutch or brake pedal support rod (1) from

the rear axle housing.

13. Retrieve clutch pedal (2) from the support shaft.

GNIL14TR04668AB

18.1 [18.100] / 4

Clutch - Clutch mechanical release control

Power Take-Off (PTO) clutch lever removal

To remove the Power Take-Off (PTO) clutch lever (1)

proceed as follows:-

1. Remove pin (1) by releasing lock plate and dis-

connect linkage between Power Take-Off (PTO) clutch

lever and Power Take-Off (PTO) clutch cross shaft.

GNIL14TR00781AA

2. Remove the split pin lock (1) take out the pin and

remove hand lever from the mounting bracket.

3. Remove bolt (2) from the housing to take out the

levers with the bracket.

GNIL14TR04671AB

Cross shafts removal

To remove cross shafts clutch housing has to be split

between engine flywheel housing and transmission

housing.

1. Remove clips (1) from both the forks and release

bearings and take out release bearings.

GNIL14TR04673AB

18.1 [18.100] / 5

Clutch - Clutch mechanical release control

2. Slide out both transmission and Power Take-Off

(PTO) clutch release bearings (1) and (2) from the shaft.

GNIL14TR04674AB

3. Loosen the Power Take-Off (PTO) clutch fork lock

screw (1).

GNIL14TR04675AB

4. Pull out the Power Take-Off (PTO) cross shaft (1)

from left hand-side of transmission housing and retrieve

fork from the housing.

GNIL14TR04677AB

5. Loosen the transmission clutch fork screw.

6. Pull out the Transmission clutch cross shaft (1) from

left-hand side of the transmission housing and retrieve

fork from the housing.

GNIL14TR04676AB

18.1 [18.100] / 6

Clutch - Clutch mechanical release control

Clutch mechanical release control - Install

Reassemble the clutch mechanical release control.

Take care of the following:

1. Reassembly follows the disassembly procedure in re-

verse.

2. Make sure that the lock clips are properly seated on the

clutch release forks.

3. Comply with tightening torques indicated. See Clutch

- Torque (18.110).

GNIL14TR04673AB

4. Apply LOCTITE® 243™ sealant to clutch release fork

lock-screw and left-hand side brake pedal lock-screw

before tightening.

5. Thoroughly clean and degrease mating surfaces of en-

gine and transmission housing. Apply a bead of liquid

gasket of approximately 2.000 mm (0.079 in) of diam-

eter. Buckle up the transmission housing and the en-

gine.

18.1 [18.100] / 7

Clutch - Clutch mechanical release control

Clutch mechanical release control - Adjust

Clutch pedal free play should be 30.00 - 45.00 mm

(1.18 - 1.77 in). To adjust the clutch pedal free play

proceed as follows:

GNIL14TR04687AA

1. Remove the split pin (1) and disconnect the linkage.

2. Loosen the lock nut (2).

3. Rotate the yoke (3) clockwise to reduce the play and

anti-clockwise to increase the play.

4. Connect the linkage back to the cross shaft.

GNIL14TR04688AB

Power Take-Off (PTO) clutch lever free play (double speed )

1. Remove the pin (2), fork (3) and rod (5) separately.

2. Keep lever (1) at the right most position such that the

bearing just touches the clutch fingers.

3. Insert rod (5) into fork (6) and tight the threads up to

15.00 mm (0.59 in).

4. Keep end of lever (7) at 30.00 - 35.00 mm (1.18 -

1.38 in) from edge as shown in figure.

5. Keep the rod in static position and insert fork (3) into

rod (5).

6. Match the hole of fork (3) with hole of lever (1). Keep

the lever in initial position.

7. Insert pin (2) in matching holes and lock lever (1).

GNIL14TR04690FB

18.1 [18.100] / 8

Clutch - Clutch and components

Clutch - General specification

Type

Dry plate torsion springs

Control

Mechanical pedal for transmission

Hand lever for PTO

Release mechanism

Diaphragm type

Plate material

Cerametallic

Plate thickness

7.50 - 8.10 mm (0.30 - 0.32 in)

Plate with pressure springs

Tangential springs

Clutch - Torque

Description

Thread Size (mm)

Torque

Transmission housing to flywheel

M12 X 1.25

7.00 kgf (15.43 lbf)

housing buckle up bolts (C1)

Clutch assembly mounting bolts (C2)

M8 X 1

2.60 kgf (5.73 lbf)

Bolts, release fork (C3)

M16 X 1.5

16.00 kgf (35.27 lbf)

18.2 [18.110] / 3

Clutch - Clutch and components

GNIL14TR00801GA

Clutch - Special tools

Tool Description

Tool Number

Clutch centralizer and finger height setting gauge

380000612

Clutch finger height adjusting wrench (set of three)

380000256

Installer, oil seal in clutch housing

84261387

Installer, oil seal in hollow shaft

84261388

Clutch - Sealing

Operation description

Sealant specification

Engine to transmission buckle up (S1)

LOCTITE® 518™

Bolts, release fork (S2)

LOCTITE® 243™

18.2 [18.110] / 4

Clutch - Clutch and components

Clutch - Dynamic description

The clutch system is double clutch mechanical type. It includes two dry clutch discs with non-asbestos, organic ma-

terial pads. One clutch disc is to connect transmission to engine and another for connecting PTO directly to engine,

independent of transmission.

The clutch is located in front of the transmission. The transmission (main) clutch is operated by means of foot pedal

and PTO clutch is operated by hand lever located on right side below rear hood panel. The clutch system is composed

of the clutch housing, clutch pressure plate, disc ring, clutch release fingers, clutch release bearings and clutch discs.

OPERATION

When both the clutches are engaged, the PTO clutch pressure plate pushes the PTO clutch disc against engine

flywheel and transmission pressure plate pushes the clutch housing by the spring action of dish ring.

The friction between the clutch disc, flywheel and clutch housing transmits the engine power to the transmission drive

shaft and PTO drive shaft independently.

The clutch pedal is connected to the main clutch release bearing by means of mechanical linkage components.

When the clutch pedal is pressed, the clutch release bearing moves forward and discharges the main clutch fingers.

Consequently, the clutch pressure plate backs off and releases the clutch disc from the clutch housing. The transfer

of engine power to the transmission is stopped.

When the clutch pedal is released, the main clutch release bearing disengages the main clutch finger which acts on the

clutch pressure plate and causes the clutch housing, main clutch discs and pressure plates to come in contact. The

flow of power from the engine and transmission is re-established. Similarly PTO clutch is engaged and disengaged

independent of transmission clutch by operating PTO clutch control lever.

18.2 [18.110] / 6

Clutch - Clutch and components

Clutch - Remove

WARNING

Avoid injury!

Handle all parts carefully. Do not place your hands or fingers between parts. Use Personal Protec-

tive Equipment (PPE) as indicated in this manual, including protective goggles, gloves, and safety

footwear.

Failure to comply could result in death or serious injury.

W0208A

It is necessary to split the tractor between engine and

transmission housing to gain access to the clutch.

1. Remove the bolts (1).

2. Separate the transmission housing from engine. See

engine removal section.

GNIL14TR00753AA

3. Remove the bolts (1) which retains the clutch assem-

bly to the engine fly wheel and slacken the two remain-

ing bolts.

GNIL14TR00754AA

Insert centralizing pin special tool number

380000612 in clutch plate shaft seats back off the two

remaining bolts.

5. Remove the assembly completely.

6. Retrieve the Power Take-Off (PTO) clutch disc.

18.2 [18.110] / 9

Clutch - Clutch and components

Clutch - Disassemble

WARNING

Avoid injury!

Handle all parts carefully. Do not place your hands or fingers between parts. Use Personal Protec-

tive Equipment (PPE) as indicated in this manual, including protective goggles, gloves, and safety

footwear.

Failure to comply could result in death or serious injury.

W0208A

1. Remove the clutch assembly from the tractor as de-

scribed earlier in this section. See Clutch - Remove

(18.110).

2. Loosen the Power Take-Off (PTO) clutch release lever

locknuts (1).

NOTICE: Since the locknuts are under the load of disk ring,

loosen all these gradually and evenly by rotating 1/4 to 1/2

turns.

GNIL14TR04695AB

3. Remove Power Take-Off (PTO) pressure plate (1).

GNIL14TR04696AB

4. Remove disk ring (1) and lock ring (2).

GNIL14TR04697AB

18.2 [18.110] / 10

Clutch - Clutch and components

Clutch - Inspect

1. Check clutch driven discs for wear and replace if rivets

(2) are near or flush with top facing.

2. Discs are also to be replaced if the organic facings are

found to be soaked with oil.

3. Check condition of clutch housing and pressure plate

friction surfaces. If necessary dress noting that dimen-

sions of pressure plates and clutch housing must not

be reduced below the limits described below otherwise

replace as necessary.

20097548

18.2 [18.110] / 13

Clutch - Clutch and components

See 1.

•

Fly wheel (1) under cut - ‘A’ = 2.000 mm (0.079 in)

•

Power Take-Off (PTO) clutch pressure plate (2)

thickness - ‘B’ = 22.000 mm (0.866 in)

•

Transmission clutch pressure plate (3) thickness - ‘C’

= 24.000 mm (0.945 in)

•

Clutch housing under cut -‘E’ = 2.500 mm (0.098 in)

•

Dressing allowance - ‘F’ = 70.000 - 70.150 mm

(2.760 - 2.760 in)

•

Calculate dimension ‘F’ as follows

F=A+B+C+S1+S2+P

Where,

S1 = Power Take-Off (PTO) clutch disc thickness

S2 = Transmission clutch disc thickness

P = Spring dimensions to restore original load =

4.500 mm (0.180 in) (fixed)

•

Check that value ‘F’ is equal to 69.850 - 70.150 mm

(2.750 - 2.760 in)

•

In restoring value ‘F’ check that clutch housing thick-

ness ‘E’ does not fall below 17.000 mm (0.670 in)

i.e. D-F = E ≥ 17.000 mm (0.670 in)

•

Check that the undercut ‘E’ on clutch housing is

deeper than 2.500 mm (0.098 in) and restore as

necessary.

•

If necessary, dress friction face on flywheel and re-

store external undercut ‘A’ of 2.000 mm (0.079 in).

18.2 [18.110] / 14

Clutch - Clutch and components

Clutch - Assemble

Re-assembly follows disassembly procedure in reverse

order. See Clutch - Disassemble (18.110) .

1. Position disc springs (1) correctly and lock-ring (2) on

transmission pressure plates as shown in 1.

GNIL14TR04706AB

2. Use special tool number 380000612, and centralize the

clutch discs.

3. Install the clutch assembly on flywheel.

4. Adjust the release fingers as described under clutch

release finger settings. See Clutch - Adjust (18.110).

18.2 [18.110] / 15

Clutch - Clutch and components

Clutch - Adjust

For correct function of clutch release mechanism, the

release fingers must be set at the distances D - 96 mm

(4 in) and D1 - 121 mm (5 in) relative to flywheel face

for transmission clutch and Power Take-Off

(PTO)

clutch respectively.

Follow the below described procedure to obtain these

settings.

1. Install the clutch assembly on engine flywheel.

GNIL14TR00754AA

2. Insert centralizer pin, special tool number 380000612,

along with fingers height setting gauge drive shaft seats

ensuring that end is in contact with flywheel housing.

3. First set Power Take-Off (PTO) release fingers by us-

ing height setting gauge as shown in figure. Gap be-

tween gauge and finger should be between 0.30 mm

(0.01 in). Use feeler gauge to check the gap.

4. Use special tool no. 9971365. Rotate the locknut and

set the gap.

5. Similarly set the height setting gauge as shown in

the figure (b) to set transmission clutch release fin-

gers. The gap between fingers and gauge should be

0.30 mm (0.01 in).

6. Use special tool number 9971365. Loosen the locknut

and rotating screws and adjust the gap.

18.2 [18.110] / 16

Clutch - Clutch and components

Clutch - Service instruction

WARNING

Avoid injury!

Handle all parts carefully. Do not place your hands or fingers between parts. Use Personal Protec-

tive Equipment (PPE) as indicated in this manual, including protective goggles, gloves, and safety

footwear.

Failure to comply could result in death or serious injury.

W0208A

Important points to be taken into account while replac-

ing clutch:

1. Check the condition of spigot bearing replace if neces-

sary.

2. Check the condition of the oil seals on the engine and

transmission sides for leaks and replace if necessary.

3. Check the flywheel face is free from scores and cracks.

When machining the surface, follow specified toler-

ances.

NOTE: Machine the bolting surface to the same amount of

the running surface, to maintain original clamp loads.

Always use suitable tools to align holes. Do not use hands

or fingers.

4. Make sure that the alignment of the clutch cover

to the flywheel is correct. Use special tool number

380000612 for alignment.

5. Make sure that the clutch cover is secured to the fly-

wheel evenly and sequentially. Use new spring wash-

ers.

6. After an initial running-in period, any variation lever

height will correct itself.

7. Before fitting check the clutch plate for lateral runout.

8. Make sure that the clutch plate is fitted the correct way.

Observe the direction as indicated on the driven plate.

9. Check the gearbox input shaft for damage. Only non-

metallic based high melting point grease should be

used to lubricate the splines and release bearing guide

sleeve.

10. Check the release bearing guide sleeve for wear and

replace if necessary.

11. After applying the grease to the gearbox input shaft,

guide the clutch driven plate on to the shaft and re-

move the surplus grease.

12. Make sure that the alignment between the engine and

transmission/clutch housing is correct. Make sure that

the locating dowels are fit and secure.

13. Carefully guide the input shaft into the clutch hub

splines. Do not allow the weight of the transmission to

hang on the hub of the driven plate. This will prevent

irreparable damage to the segments and associated

cushion springs.

14. Make sure that the adjustment of clutch pedal free play

is correct.

18.2 [18.110] / 17

Clutch - Clutch and components

Clutch control mechanism - Remove

WARNING

Avoid injury!

Handle all parts carefully. Do not place your hands or fingers between parts. Use Personal Protec-

tive Equipment (PPE) as indicated in this manual, including protective goggles, gloves, and safety

footwear.

Failure to comply could result in death or serious injury.

W0208A

It is necessary to split the tractor between engine and

transmission housing to gain access to the clutch.

1. Loosen the set screw (1) from fork.

2. Pull out the cross shaft (2).

3. Remove clutch release fork (3).

GNIL14TR04679AB

4. Slide out the clutch release bearing (1).

GNIL14TR04680AB

5. Loosen the bolts 3 numbers as shown in figure.

GNIL14TR04681AA

18.2 [18.110] / 18

Clutch - Clutch and components

6. Unscrew bolts as shown in figure and remove top cover

(1).

GNIL14TR04682AB

7. Remove lock (1) as shown in figure. Use plastic ham-

mer to push out the shaft. The shaft will come out to-

ward gearbox side. Retrieve bearing.

GNIL14TR04683AB

8. To remove shaft (2) toward the clutch side, remove cir-

clip lock (1). Retrieve bearing and seal.

GNIL14TR04684AA

9. Use special tool number 84261387 and install the seal

(1).

GNIL14TR04685AB

18.2 [18.110] / 19

Clutch - Clutch and components

Clutch - Troubleshooting

Problem

Possible Cause

Correction

Clutch slips

Clutch disc, pressure plate and/or flywheel

Replace clutch disc; replace clutch if nec-

wear.

essary and grind the flywheel.

Damaged or bent or broken fingers.

Replace finger assembly.

Oil or grease on friction material.

Replace clutch disc; repair leak of lubricant

in to clutch housing; thoroughly clean fric-

tion surfaces.

Clutch grabs

Stiff external control linkage.

Check and lubricate linkage pivot points.

Warped clutch disc.

Replace clutch disc.

Clutch disc with damaged damper springs

Replace clutch disc.

or loose hub.

Oil or grease on friction material.

Replace clutch disc; repair leak of lubricant

in to clutch housing; thoroughly clean fric-

tion surfaces.

Finger springs broken.

Replace finger springs.

Clutch fails to disconnect

Warped clutch disc.

Replace clutch disc.

and drags

Damaged clutch release bearing.

Replace clutch release bearing.

Damaged finger spring.

Replace finger springs.

Clutch noise at

Warped clutch disc.

Replace clutch disc.

engagement and / or

disengagement

Damaged clutch disc damper springs.

Replace clutch disc.

Excess backlash on clutch disc to hub

Replace clutch disc and shaft, as neces-

meshing splines.

sary.

Clutch noise at

Worn clutch release bearing.

Replace bearing.

disengagement

Clutch control pedal

Hard pedal.

Check and lubricate linkage.

hardness

Broken or disconnected clutch return

Repalce or hook-up clutch return spring.

spring.

18.2 [18.110] / 20

CNH Industrial America New Holland Site 100 Brubaker Avenue New Holland, Pennsylvania United States

17557

SERVICE - Technical Publications & Tools

PRINTED IN U.S.A.

NEW HOLLAND policy is one of continuous improvement and the right to change prices, specification or equipment

at any time without notices is reserved.

All data given in this publication is subject to production variations. Dimensions and weight are approximate only and

the illustrations do not necessarily show products in standard condition. For exact information about any particular

product, please consult your NEW HOLLAND Dealer.

Contents

Transmission - 21

Mechanical transmission - 114

TECHNICAL DATA

Mechanical transmission

General specification

Torque

Sealing

Special tools

FUNCTIONAL DATA

Mechanical transmission

Sectional view

Overview

SERVICE

Mechanical transmission

Drive shaft - Service instruction

Remove

Disassemble - Intermediate plate

Inspect - Intermediate plate

Assemble - Intermediate plate

Install

DIAGNOSTIC

Mechanical transmission

Troubleshooting

21.1 [21.114] / 2

Transmission - Mechanical transmission

Mechanical transmission - General specification

Gear box type

Constant mesh

Range gears

Constant mesh

Forward-reverse

Mechanical Synchromesh Shuttle

Lubrication

Transmission oil capacity

APGL4SAE 20W30 23 L (6 US gal) for 2WD (Two Wheel

Drive) and 25.0 L (6.6 US gal) for 4WD (Four Wheel

Drive)

Rear Tire Size

13.6-28

14.9-28

Gear

2600 RPM

FL1

2.56

2.73

FL2

3.86

4.11

FL3

5.69

6.07

FL4

7.83

8.34

FH1

10.03

10.68

FH2

15.10

16.09

FH3

22.29

23.75

FH4

30.67

32.68

RL1

2.70

2.88

RL2

4.07

4.34

RL3

6.01

6.41

RL4

8.27

8.82

RH1

10.59

11.29

RH2

15.96

17.00

RH3

23.56

25.10

RH4

32.40

34.53

Mechanical transmission - Torque

Description

Thread size

Torque

Gear shift lever cover bolts (C1)

2.5 kgf (5.5 lbf)

Hydraulic housing on transmission retainer bolts (C2)

M10 x 1.25

6.0 kgf (13.2 lbf)

Hydraulic housing on transmission retainer bolts (C3)

M12 x 1.25

10.0 kgf (22.0 lbf)

Crown wheel bolts (C4)

M10

6.0 kgf (13.2 lbf)

Pinion lock nut (C5)

M35

30.0 kgf (66.1 lbf)

Drain plug (C6)

M22

4.5 kgf (9.9 lbf)

Power Take-Off (PTO) cover bolts (C7)

M12 x 1.25

9.0 kgf (19.8 lbf)

Rear axle to transmission housing attaching bolts (C8)

M12 x 1.25

10.0 kgf (22.0 lbf)

Front cover bolts (C9)

M12 x 1.25

10.0 kgf (22.0 lbf)

Transmission housing to centre housing attaching bolts (C10)

M12 x 1.25

9.0 kgf (19.8 lbf)

Differential lock pedal screw (C11)

M10 x 1.25

6.0 kgf (13.2 lbf)

21.1 [21.114] / 3

Transmission - Mechanical transmission

GNIL14TR00828GA

Mechanical transmission - Sealing

Description

Sealant specification

Rear axle to transmission housing (S1)

LOCTITE® 518™

Gear shift lever cover (S2)

LOCTITE® 518™

Power Take-Off (PTO) cover plate (S3)

LOCTITE® 518™

Crown wheel bolts (S4)

LOCTITE® 243™

Front cover plate (S5)

LOCTITE® 518™

Front cover bolts (S6)

LOCTITE® 243™

Transmission to centre housing (S7)

LOCTITE® 518™

Lift housing to transmission housing (S8)

LOCTITE® 518™

21.1 [21.114] / 5

Transmission - Mechanical transmission

Mechanical transmission - Overview

8+8 Synchro shuttle

The transmission has eight forward and eight reverse

gears.

WARNING

Avoid injury! Always do the following before

lubricating, maintaining, or servicing the ma-

chine.

1. Disengage all drives.

2. Engage parking brake.

3. Lower all attachments to the ground, or

raise and engage all safety locks.

4. Shut off engine.

5. Remove key from key switch.

6. Switch off battery key, if installed.

GNIL14TR00513AC

7. Wait for all machine movement to stop.

Failure to comply could result in death or se-

rious injury.

W0047A

To select any one of the four forward gears or one reverse

gear use the main gearshift lever (1). To select the high

range or low range, which gives double the number of

available gears use Hi-Low selector lever (2).

To change gear range, depress the clutch pedal. Stop the

tractor and move the Hi-Low selector lever backward (for

high) or forward (for low).

To change the gears in the selected range, depress the

GNIL14TR00785AA

clutch pedal and shift main gear lever in the normal way

To select reverse gear (R), first stop the tractor.

NOTE: A safety start switch prevents operation of the

starter motor unless the transmission range lever is in

neutral position (N).

NOTE: If it is necessary to tow the tractor, the Hi-Low

selector and both main gearshift levers must be in neutral.

The transmission has an input shaft called drive shaft (1), range shaft (2), driven shaft (16) and pinion shaft (15).

1st

(4), 2nd (5) gears are integral part of the drive shaft. 3rd (6), 4th (7) gears are integral part of driven shaft. All gears

of input shaft and driven shaft are constant mesh. High gear is assembled in driven shaft while, low gear (8) is fitted

on the pinion shaft. Low drive gear (12) is part of the range shaft and is in constant mesh with low gear on the pinion

shaft.

21.1 [21.114] / 9

New Holland Tractor Workmaster 50 / Workmaster 60 / Workmaster 70 / Tier 4B (final). SERVICE MANUAL - page 3