Case Farmall 85U, 95U, 105U, 115U Tractor Service Manual

Table of Contents

1. Introduction
2. Engine
3. Transmission
4. Four Wheel Drive
5. Front Axle
6. Rear Axle
7. Power Take Off
8. Brake and Controls
9. Hydraulic Systems
10. Hitches, Drawbars and implement couplings
11. Steering
12. Cab climate control
13. Electrical System
14. Platform, cab, bodywork and decals
15. Special Tools

Manual Extract: FRONT AXLE DIFFERENTIAL

NOTE: This procedure is to be considered valid for planet gears with Z1 = 12 teeth and sun gears with Z2 = 20 teeth and modulus m = 4.1
NOTE: When overhauling the differential assembly it is necessary to adjust the backlash between the teeth of the planet pinions and the side gears.

1. Thoroughly clean the components of the differential to remove any traces of oil that would otherwise prevent accurate backlash measurement.
2. Fit the two sun gears without thrust washers on the differential casing.
3. Fit the planet pinions complete with thrust washers and pins and screw down the pin retaining bolts by a few turns to hold the pins in place.
4. Position a dial gauge on the differential housing.
5. Move the left–hand side gear to bring it into full contact with the planet pinion and then push it up against the differential housing, reading the end float ( Gs ) on the micrometer.

6. Repeat the above operations to measure the end float on the right–hand side gear ( Gd ).
– The side gear end float will be 0.25 mm (0.010 in).
– Therefore the rings to be inserted in the differential housing are given by:
– Ss = Gs – 0.25 mm (0.010 in) for the left–hand sun gear;
– Sd = Gd – 0.25 mm (0.010 in) for the right–hand sun gear.

7. Install shims as near as possible to the calculated value and, using a dial gauge and following the previously described procedure, check that the end float of the left and right–hand sun gears is approximately 0.25 mm (0.010 in).

NOTE: With an end float of ga = 0.20 – 0.30 mm (0.0079 – 0.0118 in) a clearance will be obtained between the teeth of gn = 0.12 – 0.18 mm (0.0047 – 0.0071 in)