101-3374 86-tooth camshaft drive gear for engine spare part

Product Advantages

1. Reinforced tooth root fillet reduces crack risk under cyclic load, with fatigue life tuned for older mechanical pump engines.
2. Bore and mounting holes match OEM dimensions, no reaming required for direct installation on camshaft end.
3. Deep, clearly marked timing marks remain readable under dusty site conditions and reduce alignment mistakes.
4. Precise tooth pitch keeps stable backlash, cuts meshing noise and slows wear on adjacent gears and bearings.

FAQ 

Q: Can 101-3374 interchange with 4W-9985?
A: No. They differ in tooth count, tooth profile and mounting holes, built for different engines with unmatched gear ratio.

Q: Can the gear be reused if only a few teeth have light pitting?
A: Not recommended. Mechanical pump engines have heavy torque fluctuation. Pitting spreads rapidly and tooth breakage may cause severe valve train failure.

Q: Does the crankshaft gear need replacement together?
A: Inspect the crank gear carefully. If pitting, spalling or excessive wear is found, replace both gears as a pair to avoid accelerated wear from mismatched new and used gears.