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126T Flywheel Ring Gear 033-7687 for Caterpillar CAT Engine 3054B 3056 C3.3 C3.4B C4.4 C6.6 C7.1 Excavator 320 323FLN Generator XQP60 XQP100 XQP150 XQ230
Flywheel Ring Gear for Compactor,Engine,Excavator,Generator

126T Flywheel Ring Gear 033-7687 for Caterpillar CAT Engine 3054B 3056 C3.3 C3.4B C4.4 C6.6 C7.1 Excavator 320 323FLN Generator XQP60 XQP100 XQP150 XQ230

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Product Details

126T Flywheel Ring Gear 033-7687 for Caterpillar CAT Engine 3054B 3056 C3.3 C3.4B C4.4 C6.6 C7.1 Excavator 320 323FLN Generator XQP60 XQP100 XQP150 XQ230

Part Name: Starter Motor Ring Gear

Replacement Part Number: 033-7687, CA0337687, 033-7687

Specifications:
126 Teeth
Inner Diameter: 14.815 inch
Outer Diameter: 15.913 inch

Fit for Caterpillar Engine: 3054, 3054B, 3054C, 3054T, 3056, 3056E, C3.3, C3.4B, C4.4, C6.6, C7.1

Application:
Fit for following models:
Caterpillar Excavator: 320, 320 GC, 323F LN
Caterpillar Generator:
XQP60, XQP100, XQP150, XQ230, XQ125, XQ115, D100, D125, D135, D150, D175, D200, D40, D50, D60, D80, DE150E2, DE165E2, DE165E3, DE175E3, DE20, DE56E0, DE75E0
Caterpillar Compactor:
CB-434B, CB-434C, CB-434D, CB-534B, CB-534C, CB-534D, CB-535B, CB-544, CB-545, CB44B, CB534D, CB564D, CB54, CB54B, CB64, CP-323C, CP-433E, CP76, CS-323C, CS-433E, CS64B, CS66B, CS76, CS76 XT, CS76B, CS78B, CW34, PF-290B, PF-300C, PS-300C, PS-360B, PS-360C
Caterpillar Asphalt Paver:
AP300, AP300D, AP500E, AP555E, AP600D, AP-650B, AP-655C, AP655D, AP-800C, AP-800D, BG-2255C, BG-225C, BG-230, BG-230D, BG500E, BG555E, BG-600D, BG-655D

Product Highlights
Compatible Model Brand
Model Number
Replacement Part Number
For CAT
320, CB-434D, CB-534D, CP-433E, D40, D50, D60, AP-650B, AP-655C, AP-800D, XQP150, CW34, CB44B, CB54B, AP555E, BG500E, BG555E, BG-225C, 320 GC, CB-534B, CB-534C, CB-535B, CB-434B, CB-434C, CB-544, CB-545, CP-323C, CS-323C, CS-433E, PF-290B, PS-360B, AP-800C, BG-230D, XQP60, PF-300C, PS-300C, DE150E2, DE165E2, CS64B, CS66B, CS76B, CS78B, 323F LN, AP300D, AP500E, BG-600D, BG-655D, BG-230, CB534D, CB564D, BG-2255C, CB54, CB64, DE165E3, DE175E3, DE20, PS-360C, XQP100, XQ230, D125, D135, D150, D175, D200, D100, D80, AP655D, CP76, CS76, AP600D, XQ115, XQ125, CS76 XT, DE56E0, DE75E0, AP300
033-7687
Compatible Engine Brand
Engine Number
Replacement Part Number
For CAT
3054, 3054T, C4.4, C6.6, C7.1, 3054C, 3056, C3.3, 3054B, 3056E, C3.4B
033-7687
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user
zero
Reviewed on 27/01/2026
Smooth Installation

This flywheel ring gear is built solid and has some good weight to it. The installation went off without a hitch—the bolt holes lined up perfectly and the gear teeth are machined very cleanly. After putting it on, the engine starts up smoother and that old troubling noise is gone. The seller's description was spot on; it was exactly the right part for my machine. Shipping was fast and the packaging was secure. A very satisfying purchase overall.

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