Case Farmall 110A, 120A, 125A, 130A, 140A Tractor Service Manual

Table of Content (Service Manual)

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

Manual Extract: Powered rear axle

There are two rear axles available. The standard rear axle uses three planetary gears in the final drive and is available on the Farmall 110A and Farmall 120A. The heavy-duty rear axle uses four planetary gears and is available on the Farmall 125A and Farmall 140A. Both rear axles have an electrohydraulic differential lock and hydraulic brakes.

The rear axle, mounted on the rear of the transmission, connects the power from the engine and the transmission to the rear wheels. The following components are contained within the rear axle: • Ring and pinion of the differential
• Differential
• Electrohydraulic differential lock
• Hydraulic brakes
• Final reduction gears
• Wheel axle shafts
• Power Take-Off (PTO) components
• Park/hand brake
• Fixed displacement hydraulic pumps

The power from the output shaft of the transmission passes through the spiral teeth of pinion by means of a coupler.
The pinion is in the front part of the rear axle housing. The pinion is mounted in two, preloaded, cone and cup bearings and contacts the ring gear of the differential. The ring gear is riveted to the differential carrier, which is supported between tapered roller bearings mounted in the rear axle housings.
NOTE: In service, bolts and nuts replace the rivets.