Caterpillar 311F LRR EXCAVATOR JFT — Final Drive and Travel Motor - Disassemble
Repair & overhaul
For the Caterpillar 311F LRR EXCAVATOR JFT, from the Caterpillar service manual.
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Before you start
- Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product.
- Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped.
- Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines.
Procedure
- Thoroughly clean the outside of the final drive and travel motor prior to disassembly.
- Remove the sprocket from the final drive and the travel motor. The weight of the sprocket is approximately 39 kg (85 lb).
- Mark the alignment of the final drive and travel motor for reassembly purposes. The parts must be reinstalled in the original locations.
- Use Tooling (A) and a suitable lifting device to position the final drive and the travel motor onto Tooling (B). The combined weight is approximately 170 kg (375 lb).
- Drain the oil from the final drive into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Capacities (Refill)".
- Remove fittings (1). Remove fittings (2) from traction control valve (3).
- Remove nine bolts (4) that secure traction control valve (3) to the final drive.
- Use two persons to remove traction control valve (3) from the final drive. The weight of travel brake valve (3) is approximately 27 kg (60 lb).
- Remove valve plate (5) and O-ring seal (6).
- Use Tooling (D) to remove bearing (7).
Tools required
- 138-7573 Link Bracket (Qty 3) Amazon
- 1P-2420 Transmission Repair Stand (Qty 1) Amazon
- 8T-6699 Bolts (Qty 2) Amazon
- 1P-0074 Slide Hammer Puller Gp Amazon
- 4C-5666 Threaded Adapter Amazon
- 123-6702 Backlash Gauge Gp Amazon
- 1P-0510 Driver Gp Amazon
- 8H-0663 Bearing Puller Gp Amazon
- 1P-1863 Retaining Ring Pliers Amazon
- 9U-7346 Spanner Wrench As Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Sprocket weight approximately 39 kg (85 lb)
- Combined weight of final drive and travel motor approximately 170 kg (375 lb)
- Weight of travel brake valve (3) approximately 27 kg (60 lb)
Source: Caterpillar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.