Specifications, Service and Repair of Farm and Lawn Tractors

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Massey Ferguson 3080, 3070 Gearbox Mainshaft


Mainshaft Disassembly Massey Ferguson 3070, 3060, 3065, 3080 tractors 4x2 gearbox:



Fig.1

- Remove the circlip (26).

- Remove 3rd and 4th gear synchromesh (23). Mark the direction of fitting.

- Remove the synchromesh cup (21)

- Remove the synchromesh cone (20) and the gear (18)

- Position MF 458 locking tool and the locally manufactured retainer sleeve for the mainshaft (69).

- Remove the oil feed pipe (71) and spring (72).

- Unlock the nut (68) and slacken u using tool 3376805 Ml.

- Remove the input shaft gear (67) and cone (1).

- Remove the washer (6).

- Remove tool MF 458 and the sleeve.

- Withdraw the shaft from the housing rearwards regaining 1st and 2nd gear train in place.

- From inside the housing remove, in the following order. 2nd gear (14), cone (13), 2nd gear synchromesh cup (12), 1st and 2nd synchromesh (11), cone (9),synchromesh cup (10), 1st gear (7) and its bush (8).

- Withdraw the bearing cups (16) and (2).

- Remove the shims [3], the shim 4 and circlips (15) and (5).

- Remove the bearing cone (17) and circlip (70) from the shaft.



Fig.2

Mainshaft Disassembly Massey Ferguson 3080, 3070 4x4 gearbox:



Fig.25

- Remove the lock from the nut (68) and slacken the nut using spanner MF 456.

- A new A/B range synchromesh assembly fitted with sintered cone rings was introduced from the following tractor serial numbers: 40 kph tractors: P089036/30 kphtractors: P297030.

- Remove the spur washer /73V B gear (76) with the needle rotter bearing (75) and bush (74). Remove the fork.

- Withdraw the A gear (67) with the double needle roller bearing (79) and the bush 81.

- Remove the sleeve (82) and the bearing cone (1).

- Remove the 1st and 2nd gear tram complete (Fig.25).

- The Massey Ferguson 3070, 3080 gearbox housing must be clean and free from swarf.

- Mating laces must be scraped clean,

- Use a jet of compressed air to check that all the hydraulic oilways in the gearbox and shafts are free of obstructions.

- If the MF 3080, 3070 tractor gearbox is fitted with Speedshift. fit the solenoid valve (1) and tighten to a torque of 18-20 Nm.

- Fit the T-piece (2) for the A/B feed pipe.

- Examine all parts for wear and discard any v.nich are faulty.

- Before assembling lightly lubricate the cones, cups, bearing bores, bushes, gaskets and needle roller bearings.

- Using a press, fit the bearing cone (17) on to the shaft (69).

- Fit the circlip (70). Refit the shim 4.

- Reduce the thickness of the shims [3] v. nose measurement was noted on disassembly by approximately 0.3 mm to obtain a shaft end play of 0.10 to 0.15 maximum to obtain an exact fit.

- Fit the shims [3] and cups (2) and (16).

- Assemble 1st gear (7) and its bush (8). the lock plate (9). the 1st gear synchromesh cup (10), the 1st and 2nd gear synchromesh (11), the 2nd gear synchromesh cup (12). the cone (13) and the 2nd gear (14)

- Refit the 1st and 2nd gear train assembly between the two partitions.

- Insert the shaft through the rear of the housing retaining the synchromesh/gear assembly,

- Check that the bush (8) is correctly positioned in the gear (7).

- Fit the locking tool MF 458 and the locally made retaining sleeve. Fit the washer (6)

- Using a press, fit the bearing cone (1) on the sleeve (82).

- Fit the sleeve on the shaft. To shim using formula PI, do not fit the A/B gear train.

- Fit the bush 81V the A/B synchromesh (78). the bush (74) and the spur washer 73 on the shaft.

- Fit nut (68) and tighten to a torque of 80-100 Nm using tool MF 456.

Method of shimming:

- Carry out Procedures to obtain a preload of P1= minus 0.14mm to minus 0.20mm

- Remove tool MF 458 and s sleeve.

- Position a dial gauge pointer at the end of the shaft.

- From the front of the housing while pulling on the shaft, turn it first to the right then to the left so that the cones bed properly into the cups.

- Zero the dial gauge.

- Repeat operation 100 by pushing on the shaft.

- On the basis of the dial gauge reading; select the shim thickness required to obtain P1.

- Fit tool MF 458 and the locally made-up sleeve.

- Remove the sleeve (82) and its cone (1). 107.Withdraw the cup (2).

- Position the adjusting shims [3] which were selected in operation 103.

- Position the shim 4 on the circlip (5) side.

- Fit the cup. Fit the sleeve.

- Slide the A gear (67) on to the shaft with the bush 81 (stepped side facing the synchromesh) and the double needle roller bearing (79) inserting the A/B fork into the housing.

- Use the shifter rail to retain the fork.

- Locate the synchromesh cup (80) and A/B synchromesh (78).

- Position the pads (1) and (2) for the fork (3). coat the screws (4) and (5) with Loctite 241 and tighten them by hand (Fig.37).

- Check that the pads move freely in the synchromesh sliding coupling.

- Slide the B gear (76) on to the shaft with the cup (77). the bush (74) and the needle roller bearing (75).

- Rotate gear A (67) and B (76) from right to left to ensure that the synchromesh cups are correctly positioned (80) (77).

- Fit the spur washer /73V. The oil grooves should face the B gear.

- Using a solvent degrease the shaft thread.

- Lightly coat the nut (68) with Loctite 241 then tighten to a torque of 80-100 Nm.

- Lock the nut by flattening the collar with a suitable drift punch.

- Insert the spring (72) and the oil feed pipe (71) into the shaft.

- Remove tool MF 458 and the retaining sleeve.

- Fit the gear (18) and the synchromesh lock plate (20) the brake (21) and 3rd and 4 gear synchromesh (23). Fit the circlip(26).

- Manually check: gear end play / shaft and gear train rotation

- Check that 1st and 2nd gear and A/B gear synchromesh function correctly.



Fig.37

Mainshaft Reassembly MF 3080, 3070 tractor 4x2 gearbox:



Fig.38

- Assemble the following in the order shown in the housing: 1st speed gear (7) and its bush (8). the cone (9). 1st gear synchromesh cup (10), Island 2nd gear synchro (11), 2nd gear synchro cup (12). cone (13) and 2nd gear (14).

- Carry out procedures 90 to 92.

- Press the bearing cone (1) on to the gear (67).

- Fit the gear(67) on to the shaft (69).

- Fit the nut (68) using special tool 3376805 Ml. Tighten to a torque of 80-100 Nm.

- Fit tool MF 458 and the retaining sleeve.

- Remove the lock from the nut.

- Remove the gear

- Refit the gear. Check that 1st and 2nd gear synchromesh functions correctly.

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