Specifications, Service and Repair of Farm and Lawn Tractors

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Massey Ferguson 3050, 3085 tractor Gearbox Output shaft and Layshaft


Massey Ferguson 3085, 3050, 3125, 3105 tractors gearbox Output shaft - Reassembly:



Fig.41



Fig.42



Fig.43

- Fit the circlip (49) and the bearing cup (37).

- Refit the needle roller bearing (24), washer (22) and circlip (19) on to the shaft (44). Insert the shaft into the housing without the gears.

- Slide the bearing cones (39) and (40) on to the shaft.

- The aim of this procedure is to prepare J3 shimming (Fig.41). Hold the cones (39) and (40) against the step in the shaft (44) using hand pressure.

- Take up the clearance Y between the rear of cone (40) and the groove for the circlip (45) with shim adjuster [42] and spacer /43V Select a new circlip of a size that fits snugly into the groove (Fig.42).

- Shim to obtain (Fig.43): J3 = minus 0.05 to plus 0.05 The aim of this procedure is to take up the play between the cones (39) and (40) and the cups (37) and (48) while keeping the above-mentioned shimming tolerance.

- Fit the circlip (45). Position the spacer on the circlip side.

- Fit the cup (48) and the lock plate (46). Tighten the bolts (41) to a torque of 27-32 Nm.

- Position the dial gauge pointer a; the end of the shaft (44).

- For MF 3050, 3085 tractor gearboxes fitted with the creeper range, use the gearbox plate instead of the lock plate. Tighten the bolts to a torque of 34-52 Nm.

- Push on the shaft and turn it to right and left so that the cones bed correctly into the cups.

- Zero the dial gauge. Carry out procedure 148 but pull on the shaft.

- If end play exceeds 0.05 mm select the number of shims X [47] to obtain: J3 = minus 0.05 to plus 0.05 Important: The shim(s) X [47] selected for J3 should be fitted between the cones for the following shimming procedures.

- Remove the circlip (45). Remove the shim /43\ and the shim adjusters [42].

- Measure the thickness Y of all the shims [42] and /43\ (this measurement will be useful for J5 shimming).

- Remove the bolts (41) and the lock plate (46).

- Remove the cup (48). the cones (40) and (39) and the shaft (44).

- Assemble in the housing : the Low range gear (36), the coupler (31). the hub (33). the thrust washer (32). the 4/4 gearbox 4th gear/4 x 2 gearbox 3rd gear (29) with its combined needle roller bearings (30) and (28), the thrust washer (27) and the synchromesh cup (25).

- If the bush (35) is worn, replace the gear assembly (because the bush is bored out after it has been fitted).

- If the combined bearings (30) and (28) are worn, replace the gear assembly (it is factory fitted).

- Engage the input shaft (44) retaining the gear train assembly,

- Gently pull the shaft rearwards to expose the circlip (34) groove.

- Fit the circlip (34) using tool MF 459 (Fig.47), Note: Check that the circlip is correctly fitted.

- Slide the following on to the shaft: the cone (39). the shim(s) X [47] selected in operation 151. the cone (40) and the cup (48).

- Fit the lock plate (46). Tighten the bolts (41) to a torque of 27-32 Nm.

- Fit shims to obtain (Fig.48) : J4 = plus 0.20 to plus 0.40 This shimming procedure produces end play on the gear (29) (4th Low 4x4 gearbox) (3rd Low 4 x 2 gearbox).

- Carry out procedures 147 to 150. On the basis of the reading obtained on the dial gauge select the thickness of shims Z [38] to obtain J4.

- Remove the bolts (41) and the lock plate (46). Remove the cup (48).

- Withdraw the cones (40) and (39) and the shims) X[47]

- Slide the following on to the shaft: the shims Z [38], the cone (39). the shim(s) X [47] and the cone (40),

- (Fig.49) Shim to obtain: J5 = Zero play

- The aim of this shimming procedure is to lock the cones (40) and (39) on to the shaft (44).

- From the thickness of shims Y [42] /43V selected in operation 154, deduct the thickness of shims Z [38] and X [47] to obtain: J5 = Y - (Z+X).

- Slide the number of shims selected in operation 171 on to the shaft.

- Fit the circlip (45). The circlip must be a snug fit in its groove. Check that it is correctly positioned.

- Check the shaft and gear train rotation manually.

- Check that the 3rd and 4th speed synchromesh and the High/Low range coupler operate normally.



Fig.1



Fig.2



Fig.47



Fig.48



Fig.49

Massey Ferguson 3050, 3085 tractors Creeper Gearbox

Refitment:



Fig.50

- Position the lock plate (1) and the ring gear (2) on the housing.

- Attach the friction washers (3) and (4) to the planetary carrier (5) using Amber Technical-grease.

- Slide the pinion carrier on to the output shaft.

- Position the cover plate (6).

- Fit the bolts (7) and tighten to a torque of 34-52 Nm.

Massey Ferguson 3050, 3085 tractor gearbox Layshaft - Reassembly:



Fig.52



Fig.53

- A new designed shaft was introduced from serial no. P345012. Tractors prior to this are built using version a.

- Fit the needle roller bearing (62) against the shoulder on the shaft (54) using a press. Check that the needle roller bearings turn freely in the cage.

- Ensure that the circlips fit easily into their grooves.

- The gap J1 is calculated according to machining tolerances (Fig.52). Carry out procedures 28 and 29 in reverse.

- Slide the spacer (57) on to the shaft. Fit the 2nd gear (59). the 1st gear (60) and the circlip (61).

- Using a set of shims, measure the space between the 1st gear (60) and the 2nd gear (59). On the basis of the measurement, select a thickness of shims to obtain (Fig.52): J1 = 0 to plus 0.25.

- Remove the circlip (61) and the gear (60). Slide the shims already selected on to the shaft. Fit the gear and the circlip.

- Using a press, fit the bearing cones (63) and (53) holding the assembly in a suitable jig (Fig.53).

- Carry out procedures 23 and 20 in reverse.

Input shaft housing - Refitment:



Fig.54



Fig.55

- Clean the mating face.

- Check that the cup (1) and the «o» ring (2) are fitted (Fig.54).

- (Fig.55) Fit the O-rings (3) and the locating dowel (4) in the housing.

- Offer up the input shaft housing assembly (66) into the housing by tilting st to the left then tilting it to the right to engage the reverser gear train into the A/B gear train.

- At the same time, check through the selector cover that the reverse shuttle selector (5) (Fig. 54) is not in contact with the housing partition and that the layshaft cone (63) engages in the cup (64).

- Position the housing assembly over the locating dowel.

- Fit the bolts and tighten to a torque of 45-60 Nm. Remove the retaining tool. Shim to obtain: J2 = plus 0.04 to plus 0.12

- Fit the locally made-up tool into the MF 3050, 3085 tractor gearbox layshaft.

- Lightly comroress the spring by tightening the nut on the tool so that the cones seat correctly in the cups.

- Rotate the shaft several times.

- Measure the space X using a depth gauge between face A of the cup (52) and face B of the housing.

- Measure the thickness Y of the washer (50).

- Calculate the difference between X and Y.

- Determine the thickness of shims required to obtain a play of plus 0.04 to plus 0.12.

- Remove the compression tool.

- Position the shims [51] selected in procedure 202.

- Press the washer into the housing.

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