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

Transmission - Mechanical transmission

GNIL14TR04107FB

A Main gear lever (1st/2nd & 3rd/4th)

E PTO 540

B Range selector lever (H/L)

H High

C PTO Coupler

L Low

D Reverse

The speeds are shifted by meshing gears 1st (4), 2nd (5), 3rd (6), and 4th (7) in succession with the gearbox driven

shaft. This is done by means of gear couplers (9) and (10). If coupler (9) is shifted, say to the left, its internal teeth will

connect additional gear ring of 1st gear (4) with toothed bushings secured on the driven shaft. As a result, 1st gear (4)

will rotate together with the driven shaft and transmit rotation to pinion shaft via range shaft (2). When gear coupler

(9) is shifted to the right, the driven shaft will become rigidly connected with 2nd gear (5) having a larger number of

teeth than 1st gear. As a consequence, the pinion shaft will rotate faster than the previous speed.

Similarly by shifting gear coupler (10) to left pinion shaft is driven by 3rd gear (6) via range shaft and by shifting to

right pinion shaft is driven by 4th gear (7) via range shaft and speed of the pinion shaft varies according to the number

of teeth on the gears (6) and (7).

Range gear can be selected by shifting the range gear coupler (11) to left or right. For getting high range, shifting

coupler to left engages cluster gear directly to pinion shaft and pinion shaft receives the rotation from any one of the

gears 1st, 2nd, 3rd and 4th depending on the position of gear couplers (9) and (10) through driven shaft (16) and

range shaft (2).

For low gear range coupler (11) have to be shifted to right and pinion shaft receives rotation via driven shaft (16) and

range shaft (2). Since gear (12) has less number of gears teeth, as a consequence, the pinion shaft will rotate slower

than high range.

For high gear range coupler (11) have to be shifted to the left and pinion shaft receives a rotation directly from driven

shaft (16).

For engaging reverse gear, shift reverse gear fork to right, power flow is from input shaft via drive shaft to reverse

drive (14) gear (18) acts as intermediate gear between reverse drive gear (14) and reverse gear (13) and changes the

direction of rotation of pinion shaft. Depending on the position of range gear coupler (11) high reverse or low reverse

are obtained.

21.1 [21.114] / 10

Transmission - Mechanical transmission

8 + 8 Synchro shuttle

The synchro shuttle transmission is ideal for application

which require frequent changes of direction. The oper-

ator has to press clutch pedal and move shuttle lever to

change direction of travel. Shift lever (1) to front for for-

ward and rear to get reverse direction.

NOTE: The shuttle lever must be in the neutral (middle)

position to activate the safety start system, which allows

the engine to start.

GNIL14TR04110AB

Transmission range safety switch

The transmission range safety switch (1) is a single-pole,

single-throw, switch located along the left side of the trans-

mission. The switch is activated by the range shift lever.

When the range is in neutral, the switch is closed to allow

current to flow to the neutral start relay.

NOTE: The range shift rail operates the safety switch.

Notches in the shift rail accept the balk pin, extending the

plunger in the safety switch, when the range lever is in the

neutral position. This completes the circuit and allows the

tractor to start.

GNIL14TR00870AA

Transmission clutch safety switch

The transmission clutch safety switch (1) is a single throw-

style switch, located underneath the left side platform of

the tractor. The switch is activated by the clutch pedal.

When clutch pedal is depressed, the switch closes com-

pleting the circuit.

GNIL14TR00796AA

21.1 [21.114] / 11

Transmission - Mechanical transmission

Drive shaft - Service instruction

NOTE: Please read this carefully before starting assembly

or disassembly operations.

Precaution at flange and tool ends

While hammering at flange and tool ends during re-

moval or installation, attention must be paid to the vari-

ous phases. Functioning and integrity of tool as well as

various components must not be endangered.

Reassembling methods

Adequate holding equipment should be used for re-

assembling group.

Lifting system will be necessary for reconnecting, disas-

sembling and reassembling the ring gear or for holding

the gear box.

Use cross section drawings to ease assembly and dis-

assembly operations.

Recommendations regarding lubrication

It is very important to use proper lubricants and to main-

tain a constant level of correct lubrication.

Right operational temperature is to be maintained.

Shaft seals

Respect the following recommendations during seal

and gasket assembly:

• Clean shaft very carefully and ensure that the part in

contact with the rings is not damaged, cut or out of

roundness.

• Assemble the seals so that the lips is fitted towards

the oil side.

• Lubricate seal lips (use oil ) and fill 3/4 of seal cavity

with grease.

• Use appropriate driver. Do not use a hammer di-

rectly on the seals.

• Do not damage the seals while assembling the shaft.

O-ring

Lubricate adequately before inserting them at the right

place so as to avoid rolling while assembling shaft.

Adjusting shims

Use appropriate adjusting shims and measure each

one separately.

Complete group measurement or stamping on the shim

is not always reliable check.

21.1 [21.114] / 12

Transmission - Mechanical transmission

Bearings

Use correct pullers for bearings removal.

Clean, lubricate and inspect well before reassembling

the bearings.

The spiral elastic pins do not need such adjustment.

Sealing

Use sealants as specified. ensure that parts to be

sealed are clean, dry and grease free.

Oil drain

Before disassembly oil should be drained out from the

group.

WARNING

Disposal of used oil must be done according to the laws.

Cleaning

1. All parts in motion (gears, bearings, etc) are to be

washed accurately with parts cleaning solution.

2. Petrol and watery alkaline solutions are to be avoided.

3. Do not wash with stream or hot water as it will be very

difficult to eliminate surface humidity.

4. Dry all parts with a rag or air jet to avoid scratching from

abrasive residuals.

5. All surfaces should be covered with lubricant so as to

protect it from future oxidation.

Inspections

1. Examine accurately that all bearings, external rings

which may be still stuck in their position pivot pins on

which rolls rotate and replace those which are worn out

or damaged.

2. Gears should not be damaged and teeth should not be

excessively worn. Smoothness of the teeth should not

be deteriorated.

3. Control all grooves. Assure that they are not worn out

or damaged.

4. Replace damaged parts with original spare parts.

5. After disassembly, replace seals on rotating shaft.

21.1 [21.114] / 13

Transmission - Mechanical transmission

Mechanical transmission - 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

DANGER

Heavy objects!

Lift and handle all heavy components using lifting equipment with adequate capacity. Always support

units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.

Failure to comply will result in death or serious injury.

D0076A

NOTE: To remove the transmission housing from the tractor, tractor has to be split at clutch and transmission housing.

Fenders, hydraulic housing, three point linkage, rear tires and final drive housing have to be removed from the tractor.

1. Loosen the bolts and remove the transmission assem-

bly from the tractor. See engine removal section.

GNIL14TR00753AA

2. Loosen bolts securing foot boards on left-hand side

and right-hand side fenders. Disconnect all the wirings.

See Protections and footboards - Remove (90.118).

GNIL14TR00767AA

21.1 [21.114] / 14

Transmission - Mechanical transmission

8. Remove the ROPS (Roll Over Protection Structure)

from the tractor.

GNIL14TR00865AA

9. Place splitting trolley (special tool number: 292320) (1)

under the tractor. Place a suitable stand under both

side of the final drive housing.

10. Loosen the bolts (1), disconnect the wiring and re-

move operator’s seat.

GNIL14TR04021AB

11. Loosen the transmission and centre housing coupling

bolts (1). Use a suitable hoist and lift the assembly.

GNIL14TR04022AB

12. Loosen bolts (1) and remove top cover along with

gearshift levers.

GNIL14TR04124AB

21.1 [21.114] / 16

Transmission - Mechanical transmission

13. Loosen the bolt (1) as shown in figure before separat-

ing the transmission housing from clutch housing.

GNIL14TR04024AB

14. Separate the clutch and transmission housing.

GNIL14TR04128AA

15. Wrap chain or nylon rope on the final drive housing

and connect it to a hoist. Loosen the attaching bolts

and remove the final drive housing.

16. Repeat for the final drive housing on the other side.

17. Loosen the bolts securing hydraulic housing on trans-

mission housing and lift the housing using suitable

hoist.

GNIL14TR04026AA

18. Place transmission housing on a suitable stand.

GNIL14TR04027AA

21.1 [21.114] / 17

Transmission - Mechanical transmission

Mechanical transmission - Disassemble - Intermediate plate

WARNING

Heavy objects!

Lift and handle all heavy components using lifting equipment with adequate capacity. Always support

units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.

Failure to comply could result in death or serious injury.

W0398A

CAUTION

Pinch hazard!

Always use suitable tools to align mating parts. DO NOT use your hand or fingers.

Failure to comply could result in minor or moderate injury.

C0044A

To remove the intermediate plate and reverse gear.

1. Remove Power Take-Off (PTO) shaft (1).

GNIL14TR04150AB

2. Remove all roll pins from gear rails to make dismantling

easy. Remove the springs and balls.

NOTE: Remove plug (1), from housing as shown at (2),

from where Hi/Low rail passes, retrieve spring and ball (3)

of Hi/Low rail. Retrieve balls and springs from location (4)

and (5).

GNIL14TR04132AB

3. Remove the springs (1) and balls (2), with the help of a

magnetic tool.

4. Remove all the rails and take out gates, forks.

NOTE: Bring all the gears neutral position to remove rails

and retrieve balls from crown side.

GNIL14TR04133AB

21.1 [21.114] / 18

Transmission - Mechanical transmission

5. Remove the snap ring (2) securing the reverse drive

gear.

6. Remove the reverse drive gear (1) from drive shaft.

GNIL14TR04147AB

7. Unscrew the reverse intermediate gear shaft locking

screw (1) with a screw driver (2).

8. Remove the idler gear (3).

GNIL14TR04135AB

9. Remove the spacer (1), needle bearing (2), and re-

verse intermediate gear pin (3), along with reverse in-

termediate gear (4).

GNIL14TR04136AB

10. Remove the snap ring (1) securing the driven shaft

bearing.

GNIL14TR04137AB

21.1 [21.114] / 19

Transmission - Mechanical transmission

Mechanical transmission - Assemble - Intermediate plate

WARNING

Heavy objects!

Lift and handle all heavy components using lifting equipment with adequate capacity. Always support

units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.

Failure to comply could result in death or serious injury.

W0398A

CAUTION

Pinch hazard!

Always use suitable tools to align mating parts. DO NOT use your hand or fingers.

Failure to comply could result in minor or moderate injury.

C0044A

1. Install the retaining rings (1) into the intermediate plate.

GNIL14TR04141AB

2. Expand the retaining ring (1) and insert the bearing.

Use a hammer to drive the bearing in until the retaining

ring locks into the groove on the bearing.

3. Install the intermediate plate on the front of the trans-

mission housing.

GNIL14TR04142AB

4. Secure the intermediate plate with the bolts (1) that

were removed during disassembly.

GNIL14TR04143AB

21.1 [21.114] / 22

Transmission - Mechanical transmission

5. Secure the driven shaft bearing with the snap ring (1).

GNIL14TR04144AB

6. Install the spacer (1), needle bearing (2) and reverse

intermediate gear pin (3) along with the reverse inter-

mediate gear (4).

GNIL14TR04145AB

7. Use thread locker LOCTITE® 243™ for locking reverse

intermediate gear (1) shaft screw.

GNIL14TR04146AB

8. Install the reverse drive gear (1) onto the drive shaft.

9. Secure the reverse drive gear (1) with the snap ring (2).

GNIL14TR04147AB

21.1 [21.114] / 23

Transmission - Mechanical transmission

10. Install all the shift rails shift gates and shift forks after

installing the springs (1) and detent balls (2).

GNIL14TR04148AB

11. Install all roll pins to shift rails along with springs and

detent balls.

NOTE: Install the detent balls and springs where shown

(1) and (2). Insert the Hi/Low rail detent ball and spring (3)

where shown (4). Install the plug (5) above the Hi/Low rail

detent ball and spring at (4).

GNIL14TR04149AB

12. Install the Power Take-Off (PTO) shaft (1).

GNIL14TR04150AB

21.1 [21.114] / 24

Transmission - Mechanical transmission

Mechanical transmission - Install

NOTE: Before assembling housings covers and support, thoroughly clean and degrease mating surfaces and apply

a 2.000 mm (0.079 in) bead of LOCTITE® 518™ sealant.

1. Use a suitable lifting device to lift and install the final

drive housing.

2. Install the final drive housing onto the transmission

housing. Secure the final drive housing with the bolts

from removal. Torque the M12 bolts to 98.00 N·m

(867.37 lb in).

3. Repeat procedure for other side.

GNIL14TR04129AA

4. Using a suitable lifting device, install the hydraulic

housing onto the rear of the transmission housing.

5. Remove the complete transmission assembly from the

stand using a suitable device.

6. Attach the transmission housing to the clutch housing

and secure with the M12 attaching bolts (1) from re-

moval. Torque the bolts to 88.00 N·m (778.87 lb in)

GNIL14TR04152AB

7. Attach the clutch housing to the transmission housing

by installing the bolt (1).

GNIL14TR04153AB

8. Install the M8 x 20 gear box cover bolts (1) securing

cover. Torque the bolts to 24.50 N·m (216.84 lb in).

GNIL14TR04124AB

21.1 [21.114] / 25

Transmission - Mechanical transmission

9. Install the operator's seat onto the hydraulic housing.

Connect the wiring.

GNIL14TR04021AB

10. Connect all the hydraulic lines.

11. Install the ROPS to the axle housings. Secure using

the bolts and nuts (1).

GNIL14TR04017AB

12. Install the rear fenders (1).

GNIL14TR00790AA

13. Install both left-hand and right-hand side wheels (1).

GNIL14TR04159AB

14. Remove the jack stands (1) and splitting trolley (2).

15. Install the three point linkages (1) to the tractor.

21.1 [21.114] / 26

Transmission - Mechanical transmission

16. Secure the footrest (1) to the fender and transmission

housing.

GNIL14TR04162AB

17. Connect the clutch linkage (1).

NOTE: Check the clutch pedal free play and adjust as nec-

essary.

NOTE: Connect the brake linkage rods to the brake pedals.

GNIL14TR04164AB

18. Connect the wire harness connector (1) between left-

hand and right-hand side fenders.

GNIL14TR04165AB

19. Connect the electrical couplings (1).

GNIL14TR00797AA

21.1 [21.114] / 27

Transmission - Mechanical transmission

Mechanical transmission - Troubleshooting

Problem

Possible Cause

Correction

Noisy operation with

Input and output shaft support bearing mis-

Remove transmission housing and adjust

range in neutral and main

adjusted.

bearings.

lever engaged

Failed or defective inner component.

Remove housing, overhaul transmission

and replace faulty parts.

Internal component seizure due to poor lu-

Overhaul transmission and top up oil to cor-

brication.

rect level.

Noisy operation with

Faulty clutch plate springs.

Replace clutch plates.

tractor stationery, idling

engine and transmission

in neutral

Self disengagement of

External linkage and levers mis-adjusted.

Adjust correctly.

speed, range gears

Failed control rail retaining springs.

Replace springs.

Partial engagement travel.

Correct reasons for problem and restore full

travel.

Difficult engagement of

External levers mis-adjusted.

Adjust correctly.

speed and range gears

External levers stiff or seized.

Check pivot points and correct.

Internal control items

(rails, forks and

Overhaul control items.

sleeves) slide with difficulty.

21.1 [21.114] / 29

Index

Transmission - 21

Mechanical transmission - 114

Drive shaft - Service instruction

Mechanical transmission - Assemble - Intermediate plate

Mechanical transmission - Disassemble - Intermediate plate

Mechanical transmission - General specification

Mechanical transmission - Inspect - Intermediate plate

Mechanical transmission - Install

Mechanical transmission - Overview

Mechanical transmission - Remove

Mechanical transmission - Sealing

Mechanical transmission - Sectional view

Mechanical transmission - Special tools

Mechanical transmission - Torque

Mechanical transmission - Troubleshooting

21.1 [21.114] / 30

Transmission - Mechanical transmission external controls

Mechanical transmission external controls - Adjust

Shuttle interlock cable

1. Measure dimension (A) at cable end as shown in figure

1. (Top of nut to bottom of threads). The desired length

of (A) is approximately 26.000 mm (1.024 in), adjust if

required.

GNIL14TR04225AB

2. At the opposite cable end, count the number of visible

threads (B), there should be 6 or 7. Thread length can

be changed by adjusting the nuts on either side of cable

mounting bracket (C).

3. Adjust the nuts so that the shuttle lever starts to move

when clutch pedal is depressed beyond free play 50.00

- 55.00 mm (1.97 - 2.17 in) from rest) and then tighten.

GNIL14TR04226AB

21.2 [21.130] / 4

Transmission - Mechanical transmission external controls

Transmission control levers - 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

CAUTION

Pinch hazard!

Always use suitable tools to align mating parts. DO NOT use your hand or fingers.

Failure to comply could result in minor or moderate injury.

C0044A

1. Loosen the bolts (1) and remove the top cover (2) from

the transmission housing.

GNIL14TR00804AA

2. Remove the circlip (1). Remove the gear lever rubber

boot (2).

GNIL14TR04091AB

Main gear selector lever

3. Remove the circlip (1) on the transmission main lever.

Remove the transmission main gear selector lever (2).

GNIL14TR00805AA

21.2 [21.130] / 5

Transmission - Mechanical transmission external controls

Transmission control levers - Install

Assemble the levers in the cover plate and reinstall the

cover plate on the transmission housing. Observe the

following.

1. Inspect the rubber boot (1) for cracks or damage, re-

place if necessary.

2. Reinstallation follows the removal procedure in re-

verse, from step 7 back to step 1.

GNIL14TR00785AA

3. Before fixing cover plate, thoroughly clean and

degrease mating surface and apply a

2.000 mm

(0.079 in) bead of sealant following the pattern shown

in 2

4. Torque the bolts to the correct value.

GNIL14TR04099FB

21.2 [21.130] / 8

Transmission - Mechanical transmission internal components

Transmission internal parts - Install Transmission rails and fork

To install the shift rail and shift forks follow the proce-

dure as mentioned below.

1. Insert the bottom shift rail, (1), and 1st/2nd gearshift

fork. Insert the snap ring, (2), on the bottom shift rail

and ensure it sits on the seat in housing.

GNIL14TR04227AB

2. The Hi/low shift rail, (1), shift fork, and shift gate should

be installed after the pinion and crown settings.

NOTE: Keep grooves of rails upward to make easy fitment

of balls and springs.

GNIL14TR04228AB

3. Transmission shift rails can be identified by referring to

Figure 3.To fit rails 1st/2nd (1) and 3rd/4th (2) rails are

similar. After fitting range shaft and drive shaft fit fork

for 3rd/4th and insert reverse rail (3), passing through

fork of 3rd/4th gear.

200900174

21.3 [21.140] / 3

Transmission - Mechanical transmission internal components

4. After fitting reverse rail insert ball (1), applying some

grease in the housing.

20097886

5. Insert the rail (1), of 3rd/4th with gate (2), passing

through fork (3), of 3rd/4th gear as shown in 5.

Insert gate of 1st/2nd rail shaft on the notch of 1st/2nd

gear fork.

200900175

6. Insert the ball (1), applying some grease in housing

after removing bolt as shown in 4.

7. Insert the 1st/2nd rail (2), passing thru gate as shown

in 5.

NOTE: Keep grooves of rails upward to make easy fitment

of balls and springs.

200900174

8. Insert the ball and pin (1), after removing neutral safety

switch for Hi/Lo rail then fit neutral safety switch and

tighten it.

20097886

21.3 [21.140] / 4

Transmission - Gearbox internal components

5. Remove the shuttle detent bolt from the left-hand side

of the clutch housing.

GNIL14TR04199AB

6. Remove the spring (1) from the hole in the clutch hous-

ing.

GNIL14TR04200AB

7. Remove the detent ball (1) from the hole in the clutch

housing.

GNIL14TR04201AB

8. Remove the roll pin (1) aligning the shaft link rod (2)

and lever link rod (3).

9. Slide the shaft link rod (2) out from the lever link rod

(3) and remove the shaft link rod (2) from the cluster

housing.

10. Remove the lever link rod (3) from the shift fork (4).

11. Remove the O-rings from the shaft link rod (2).

GNIL14TR04202AB

21.4 [21.145] / 4

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