Content      ..     3      4      5      6     ..

New Holland Tractor Workmaster 50 / Workmaster 60 / Workmaster 70 / Tier 4B (final). SERVICE MANUAL - page 5

Transmission - Gearbox internal components

12. Remove the cluster gear shaft (1) from the ball bear-

ing.

13. Remove the ball bearing (2) from the cluster gear shaft

(1).

GNIL14TR04203AB

8

14. Remove the external circlip (1) from the groove of the

input shaft.

15. Remove the shuttle coupler gear assembly from the

input shaft.

GNIL14TR04204AB

9

16. Remove the external retaining ring (1) from the groove

of coupler shuttle gear (2).

17. Remove the ball bearing (3) inside the coupler shuttle

gear (2).

GNIL14TR04205AB

10

18. Remove the snap ring (1) from the groove of the input

shaft.

GNIL14TR04206AB

11

21.4 [21.145] / 5

Transmission - Gearbox internal components

19. Remove the synchronizer kit (1) shift fork (2) and rail

(3).

GNIL14TR04207AB

12

20. Remove the reverse gear (1).

GNIL14TR04208AB

13

21. Remove the ball bearing (1) from the rear of the clutch

housing.

22. Remove the oil trench plate (2) from the housing sur-

face by loosening the M8 bolts and washers (3).

GNIL14TR04209AB

14

21.4 [21.145] / 6

Transmission - Gearbox internal components

Gearbox internal components - Install

1. Place the oil trench plate (1) on the housing surface

and tighten the bolts (2) with washer (3) to 25.5 N·m

(18.8 lb ft).

2. Install the ball bearing (4) from the rear of the clutch

housing.

GNIL14TR04210AB

1

3. Install the reverse gear (1) over the input shaft spacer.

GNIL14TR04211AB

2

4. Install the shift fork (1) onto the synchronizer (2).

5. Insert the shift rail (3) through the shift fork (1).

NOTE: Secure the spring and detent ball against the

groove on the shift rail by installing the shuttle detent bolt

on the left-hand side of the clutch housing.

6. Install roll pin (4) after aligning the hole of the shift fork

(1) and shift rail (3).

7. Install the synchronizer kit (1) onto the spline of the

input shaft.

8. Secure the synchronizer on the input shaft with the ex-

ternal retaining ring (2).

GNIL14TR04212AB

3

9. Press the ball bearing (1) inside the coupler shuttle gear

(2).

10. Attach the external snap ring (3) onto the groove of

coupler shuttle gear (2).

GNIL14TR04214AB

4

21.4 [21.145] / 8

Transmission - Gearbox internal components

11. Install the shuttle coupler gear assembly (1) over the

input shaft.

12. Secure the shuttle coupler gear on the input shaft with

the external snap ring (2).

GNIL14TR04215AB

5

13. Press the ball bearing (1) into the cluster gear shaft

(2).

14. Install the cluster gear shaft (2) into the ball bearing

installed from step 2.

GNIL14TR04216AB

6

15. Apply petroleum jelly to the O-rings (1).

16. Insert the O-rings in the grooves on the shaft link rod

(2).

GNIL14TR04217AB

7

17. Insert the shaft link rod (1) through the hole in the

clutch housing.

18. Insert the lever link rod (2) in the shift fork (4).

19. Slide the shaft link rod (1) into the lever link rod (2).

20. Align the holes in the shaft link rod (1) with the holes

in the lever link rod (2). Secure using the roll pin (3).

GNIL14TR04218AB

8

21.4 [21.145] / 9

Transmission - Gearbox internal components

21. Insert the detent ball (1) in front of the spring.

GNIL14TR04219AB

9

22. Insert the spring (1) into the clutch housing.

23. Install the shuttle detent bolt to the left-hand side of

the clutch housing.

GNIL14TR04220AB

10

24. Insert the pin and spring (1) to shuttle cable (2).

GNIL14TR04221AB

11

25. Insert the shuttle cable (1) through the hole on the

left-hand side of the clutch housing.

GNIL14TR04222AB

12

21.4 [21.145] / 10

Transmission - Gearbox internal components

26. Attach the cable on the linkage and secure with the

snap ring (1).

27. Attach the linkage to the shaft link rod. Secure using

the pin and cotter pin.

GNIL14TR04223AB

13

Synchro shuttle rails and fork

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

dure as mentioned below.

29. Insert shuttler rail.

30. 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

14

31. 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

15

21.4 [21.145] / 11

Transmission - Gearbox internal components

32. 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.

GNIL14TR04229AB

16

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

grease in the housing.

GNIL14TR04230AB

17

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

through fork (3) of 3rd/4th gear as shown in figure 18.

GNIL14TR04231AA

18

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

gear fork.

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

after removing bolt as shown in figure 17.

GNIL14TR04232AB

19

21.4 [21.145] / 12

Transmission - Gearbox internal components

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

in figure 18.

NOTE: Keep grooves of rails upward to make easy fitment

of balls and springs.

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

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

tighten it.

GNIL14TR04230AB

20

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

grease in the housing as such it sits in groove given

on reverse rail.

40. Insert the balls (1) and springs (2) of the rails. Insert

plug above the spring of Hi/Low rail. Fit roll pins (3) in

all rails and gates.

GNIL14TR04234AB

21

21.4 [21.145] / 13

Transmission - Gearbox internal components

Drive shaft - Remove

1. Remove the drive shaft (1) 3rd gear drive gear (2) and

3rd/4th gear coupler (3) as a assembly from the trans-

mission housing.

NOTE: 1st and 2nd gear are a integral part of the drive

shaft.

GNIL14TR04174AB

1

2. Remove shims.

GNIL14TR04175AB

2

3. Remove the snap ring (1) securing the 4th gear drive

gear (2) on the range shaft.

GNIL14TR04176AB

3

4. Remove the 4th gear drive gear (1) from the range

shaft.

GNIL14TR04177AB

4

21.4 [21.145] / 14

Transmission - Gearbox internal components

5. Remove the driven shaft (1) from the housing.

NOTE: 3rd and 4th gears are a integral part of the driven

shaft.

6. Clean and inspect the gears and hub for excess wear,

chipped gear teeth, cracks or any other damage. Re-

place as necessary.

7. Inspect the shift fork for wear or damage. Replace as

necessary.

8. Inspect the shift rail for wear or damage. Replace as

necessary.

GNIL14TR04178A

5

Range shaft removal

9. Remove the circlip lock (1) of the range shaft.

GNIL14TR04065AB

6

10. Remove the range shaft (1) from the housing. Re-

move the oil feeder cup (2) from the shaft as shown.

GNIL14TR04066AB

7

11. After removing the high low rail take out high low fork

(1).

NOTE: It is required to take out the spacer (2), spring and

ball of high low rail shaft from the housing.

GNIL14TR04067AB

8

21.4 [21.145] / 15

Transmission - Gearbox internal components

12. Remove the range shaft. Remove the snap ring (1) of

range shaft bearing. Remove the range shaft bearing.

GNIL14TR04068AB

9

21.4 [21.145] / 16

Transmission - Gearbox internal components

Drive shaft - Disassemble

1. Remove the snap ring (1) from the drive shaft to remove

the hub along with coupler.

GNIL14TR04179AB

1

GNIL14TR04180AA

2

2. Remove the snap ring (1) from the drive shaft. Remove

the 3rd drive gear (2).

NOTE: 1st and 2nd gear are a integral part of the drive

shaft.

GNIL14TR04181AB

3

21.4 [21.145] / 17

Transmission - Gearbox internal components

Driven shaft - Remove

1. Remove the bottom shift rail (1).

NOTE: The bottom shift rail has a M12 plug (2) that must

be removed from the front of the housing.

GNIL14TR04169AB

1

2. Remove the 1st gear (1) off the synchromesh driven

shaft.

GNIL14TR04170AB

2

3. Remove the snap ring (1) from the driven shaft. Take

out the 1st/2nd gear shift fork (2), the 1st/2nd gear cou-

pler (3), and the hub (4) of the driven shaft.

NOTE: Keep the face of the hub with the cut towards the

pinion side.

GNIL14TR00867AA

3

4. Remove the snap ring (1) that secures the 2nd gear.

GNIL14TR04172AB

4

21.4 [21.145] / 19

Transmission - Gearbox internal components

5. Remove the 2nd gear (1) from driven shaft.

GNIL14TR04173AB

5

21.4 [21.145] / 20

Transmission - Gearbox internal components

Driven shaft - Disassemble

Dismantling on bench

1. Remove the snap ring (1) to remove the high gear (2)

and bearing (3) from the synchromesh driven shaft.

GNIL14TR04182AB

1

NOTE: 3rd and 4th gear are a integral part of the driven

shaft (1).

GNIL14TR04183AB

2

21.4 [21.145] / 21

Transmission - Gearbox internal components

Driven shaft - Install Transmission drive and driven shafts

NOTE: Before assembly carefully check gears needle bearing snap rings etc. and replace if found faulty.

1. Fit the oil connector (1) between driven shaft and pin-

ion keeping larger diameter towards driven shaft before

fitting driven shaft on pinion.

GNIL14TR04184AB

1

2. Install the driven shaft (1) into the housing.

NOTE: 3rd and 4th gears are a integral part of the driven

shaft.

GNIL14TR04185AB

2

3. Install the 4th gear drive gear (1) onto the range shaft.

GNIL14TR04186AB

3

4. Secure the 4th gear drive gear (1) with the snap ring

(2).

GNIL14TR04187AB

4

21.4 [21.145] / 23

Transmission - Gearbox internal components

5. Install shims and synchronizer ring on the 4th gear.

GNIL14TR04188AB

5

6. Instal 3rd gear with synchronizer on drive shaft (1) and

retain with snap ring (2).

GNIL14TR04189AB

6

7. Install the synchromesh drive shaft (1) in assembled

form which includes the drive shaft 3rd gear drive gear

(2) and 3rd / 4th gear coupler (3).

NOTE: 1st and 2nd gear are a integral part of the drive

shaft.

GNIL14TR04190A

7

8. Install synchronizer ring.

GNIL14TR04191AB

8

21.4 [21.145] / 24

Transmission - Gearbox internal components

9. Install 2nd gear onto the synchromesh driven shaft and

secure 2nd gear with a snap ring (1).

GNIL14TR04192AB

9

10. Install the hub (1) 1st/2nd gear coupler (2) onto the

driven shaft and insert the shift fork (3) onto the cou-

pler. Secure the hub with the snap ring (4).

NOTE: Keep the face of the hub with the cut towards the

pinion side.

GNIL14TR04193AB

10

11. Secure the shift fork in place by inserting the bottom

shift rail (1).

NOTE: Insert the M12 plug (2) for the shift rail into the hous-

ing.

GNIL14TR04194AB

11

21.4 [21.145] / 25

Transmission - Dropbox

Dropbox - Remove

1. After removing the drive shaft, drain the oil from the

tractor transmission. See Drive shaft

- Remove

(23.314) for the drive shaft removal.

2. Detach the hand lever vertical rod (1) from the drop box

control lever.

3. Remove the mounting bolts (2) and remove the drop

box assembly.

NOTE: Drain the oil from the drop box by removing the

drain plug on the drop box.

20097721

1

21.5 [21.200] / 3

Transmission - Dropbox

Dropbox - Disassemble

1. Use a punch to remove the roll pin (1) from the drop

box (2) and idler gear shaft (3).

2. Push the idler gear shaft (3), forward out of the drop

box (2) and remove the idler gear (4), spacers (5), and

needle bearing (6) from the drop box.

3. Check the idler gear shaft, idler gear, spacers, and nee-

dle bearing for any wear or damage. Replace as nec-

essary.

200900126

1

4. Remove the following :-

• Dust seal disc (7).

• Shaft seal (8).

• Retaining ring (9).

• Output shaft (10), with bearing (11), and dust ex-

cluder (12).

NOTE: Drill a 1/8 inch hole on each side of the dust seal

(7) and shaft seal (8) and insert sheet metal screws into the

holes to pull the parts from the case bore.

5. Remove the output shaft gear (13), and splined coupler

(14), from the case.

200900126

2

6. To remove shift lever :-

• Unscrew the plug (15) with sealing washer (16).

• Remove detent plunger spring (17).

• Remove detent plunger (18).

• Remove pad (19).

• Remove Inner change lever (20) from case.

7. To remove rear bearing (21) use a slide hammer puller.

200900126

3

21.5 [21.200] / 4

Transmission - Dropbox

Dropbox - Assemble

200900125

1

1. Install rear bearing (1) into the drop box.

2. Install inner change lever (2) with O-ring (3) into the

drop box.

3. Install pad (4) onto the changing lever.

4. Install detent plunger (5), plunger spring (6), plug (7)

with sealing washer (8).

5. Place output shaft gear (9) and splined coupler (10) into

the drop box.

6. Slide output shaft (11) through the coupler, gear and

into the rear bearing. Seat shaft fully into rear bearing.

7. Install the dust excluder (12) and the front bearing (13)

onto the output shaft.

8. Install retaining ring (14) into the groove in the drop box.

9. Install shaft seal (15) and dust seal disc (16) into the

drop box.

10. Install retaining ring (17) onto the output shaft.

11. Slide the idler gear shaft (18) into the front of the trans-

fer box and slide the spacer (19), needle bearing (20),

idler gear (21), and spacer (22) onto the shaft.

12. Secure the idler gear shaft (18) by using a punch to

drive the roll pin (23) into the shaft and drop box.

21.5 [21.200] / 5

Transmission - Dropbox

Dropbox - Install

200900127

1

1. Make sure that the two locating dowel pins (1) are in-

stalled in the drop box.

2. Place a bead of gasket eliminator 518 onto the mount-

ing surface of the transfer box.

3. Install transfer box assembly onto the tractor using

eight M10 x 30 (2) mounting bolts.

4. Torque bolts to 49.0 - 62.8 N·m (36.1 - 46.3 lb ft).

5. Attach the vertical hand lever rod (3) onto the drop box

lever.

6. Refill transmission with oil.

21.5 [21.200] / 6

Four-Wheel Drive (4WD) system - Drive shaft

Drive shaft - Remove

1. Loosen the bolts (1) on both the ends of the Four-Wheel

Drive (4WD) shaft guard and remove the 4WD shaft

guard.

NOTE: The drive shaft guard can be separated into two

sections.

GNIL14TR00823AA

1

2. Unseat the retaining rings (1) and (2). Slide the splined

couplers (3) and (4) toward the center mounting bracket

of the 4WD shaft.

GNIL15TR01128FA

2

3. Remove the two mounting bolts (1) from center mount-

ing bracket of the 4WD shaft.

4. Remove the 4WD shaft (2).

GNIL15TR01129AA

3

5. Inspect splines of shaft, coupler and condition of bore

of center support housing for wear or damage.

23.1 [23.314] / 3

Four-Wheel Drive (4WD) system - Drive shaft

Drive shaft - Install

GNIL15TR01128FA

1

1. Tighten the bolts (1) on the center mounting bracket of

the Four-Wheel Drive (4WD) shaft.

GNIL15TR01129AA

2

2. Engage the spline coupler (2), figure 1, on the Power

Take-Off (PTO) shaft of the front axle and the 4WD

shaft.

3. Push the 4WD shaft (1) toward the front axle.

GNIL15TR01130AA

3

23.1 [23.314] / 4

Four-Wheel Drive (4WD) system - Drive shaft

4. Seat the retaining rings (8), figure 1, on the front axle

PTO shaft and 4WD shaft.

5. Seat the retaining ring (1) on the PTO shaft of the drop

box.

GNIL15TR01130AA

4

6. Slide the spline coupler (1) toward the drop box.

7. Measure the gap (2) on the 4WD shaft between retain-

ing ring groove and sleeve face.

GNIL15TR01131AA

5

8. Slide the spline coupler (1) away from the drop box.

GNIL15TR01130AA

6

9. Insert suitable shim or combination of shims (9), figure

1, on the drop box PTO shaft to make up for the gap.

Maintain a free play of 0.3 mm.

10. Slide the spline coupler toward the drop box and seat

the retaining ring (3), figure 1.

23.1 [23.314] / 5

Four-Wheel Drive (4WD) system - Drive shaft

11. Fit the drive shaft guard and tighten the bolts (1) on

both the ends.

GNIL14TR00823AA

7

23.1 [23.314] / 6

Content      ..     3      4      5      6     ..