9G-1918 sun gear for CAT bulldozer spare part

9G-1918 sun gear for CAT bulldozer spare part Featured Image
  • 9G-1918 sun gear for CAT bulldozer spare part

Short Description:

Sun gear for Caterpillar D8L/D9N/D9R bulldozer and 589 pipelayer final drive, 34 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

Sun gear is the main driving gear of final drive planetary reduction assembly. It meshes with planet gears and ring gear, transmits and distributes power torque under heavy impact load. Pitting, spalling, broken teeth and internal spline wear will cause abnormal noise, power vibration and unstable torque transmission, and may destroy the whole planetary gear set.

Part No.:9G-1918
Type: Sun Gear
Teeth: 34 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 track-type tractor and 589 pipelayer, 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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