9P-3801 support shaft for CAT bulldozer spare part

9P-3801 support shaft for CAT bulldozer spare part Featured Image
  • 9P-3801 support shaft for CAT bulldozer spare part

Short Description:

Support shaft (planet shaft) for Caterpillar D9L bulldozer final drive planetary assembly, carries planet gears, transmits torque and supports smooth rotation of planet gears to stabilize power output.

Product Detail

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description

Support shaft is the core load-bearing shaft of final drive planetary assembly. It is used for mounting planet gears and bearings, bears heavy torque and impact load, locates running track of planet gears and distributes power evenly. Shaft wear, scoring, bending and spline damage will cause uneven planet gear wear, abnormal noise and transmission vibration, and may break planet gears and sun gear assembly.

Part No.:9P-3801
Type: Planet support shaft
Material: Alloy structural steel
Surface Treatment: Quenched and tempered, journal induction hardening
Structure: With locating shoulder
Load Feature: Heavy load, impact torque
Working Condition: Low speed, high torque for bulldozer final drive
Matching System: D9L final drive planetary assembly

Application Scenarios

Fits Caterpillar D9L track-type tractor, installed inside final drive planetary gear set as support carrier for planet gears.

FAQ 

Q：Can I keep using the shaft with minor surface scratches?
A：Not recommended. Scratches will continuously wear the matched bearing, leading to excessive clearance and noise, damaging planet gears.

Q：Can bent shaft be straightened and reused?
A：Not recommended. Straightening changes internal stress, it may fracture under heavy impact load.

Q：Can I replace only the shaft without changing matched bearings?
A：Not recommended. Bearings are worn-in to old shaft, clearance mismatch will cause premature bearing failure.

Q：What causes spline wear on support shaft?
A：Insufficient lubrication, torque overload, stuck planet gear and misalignment will accelerate spline abrasion.

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