9P-5531 sun gear for CAT bulldozer spare part

9P-5531 sun gear for CAT bulldozer spare part Featured Image
  • 9P-5531 sun gear for CAT bulldozer spare part
  • 9P-5531 sun gear for CAT bulldozer spare part

Short Description:

Sun gear for Caterpillar D8L/D9N/D9R/D9T/D10N bulldozer final drive, 50 teeth, driving gear of planetary reduction set, transmits input torque and drives planet gears for speed reduction and torque amplification.

Product Detail

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description

Planet shaft is the core load-bearing pin of final drive planetary assembly. It mounts planet gears and needle bearings, bears continuous impact load, locates the rotation center of planet gears and distributes torque evenly. Journal scoring, wear, bending and blocked oil holes will lead to uneven planet gear wear, abnormal noise and excessive clearance, and may damage planet gears, sun gear and carrier.

Part No.:9P-5531
Type: Sun Gear
Teeth: 50 Teeth
Material: Alloy structural steel
Surface Treatment: Carburizing & quenching, tooth surface induction hardening
Structure: With internal spline
Load Feature: Heavy impact load, low speed high torque
Working Condition: Heavy load field condition for bulldozer final drive
Matching System: Final drive planetary reduction assembly

Application Scenarios

Fits Caterpillar D8L, D9N, D9R, D9T, D10N track-type tractor, installed inside final drive planetary reduction assembly as the input driving gear.

FAQ 

Q：Can sun gear with slight pitting on tooth surface keep working?
A：Not recommended. Pitting will expand and cause spalling or broken teeth, which damages planet gears and ring gear.

Q：Can I replace only sun gear without changing planet gears and ring gear?
A：Not recommended. Old gears have worn-in tooth profile, mismatched meshing will lead to rapid wear.

Q：What causes internal spline wear of sun gear?
A：Insufficient spline lubrication, heavy impact load, misalignment and worn matched shaft will accelerate spline damage.

Q：What problems will excessive gear backlash cause?
A：Excessive backlash increases impact and noise, leading to tooth breakage; insufficient backlash causes poor lubrication and overheating.

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