7G-3457 planetary gear for CAT bulldozer spare part

Short Description:

CAT planetary gear 7G-3457 (25 teeth). It rotates around sun gear inside final drive planetary set, meshes with ring gear to transmit heavy torque, reduces speed and boosts torque for reliable travel power.

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Product Detail

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Application Scenarios

Fit for CAT 834G,834H wheel dozers, 836G,836H landfill compactors, D8L,D9L,D9N,D9R,D9T,D10N track tractors, 589 pipelayer, D350E ADT. Suitable for mining and heavy earthmoving. Used to replace damaged gear during final drive overhaul and tooth failure repair.

FAQ

Q: Can 7G-3457 interchange with 7G-2476?
A: No. 7G-3457 is 25T while 7G-2476 is 20T. Mismatched ratio destroys planetary set.

Q: Can gear with light surface pitting keep working?
A: Not recommended. Pitting spreads under load and may crack teeth and lock travel drive.

Q: What risk if only planetary gear is replaced without new needle bearing and thrust plate?
A: Worn old bearing and thrust plate create excessive clearance. New gear meshes off-center and breaks quickly.

Q: Only one gear damaged in planetary set, can I replace only this one?
A: Not recommended. Remaining gears are fatigued. Mismatched wear rate leads to early failure.