204-0857 Caterpillar camshaft for engine spare part

Product Advantages

1. Pre-matched kit, with backlash and end play pre-calibrated for faster overhaul installation
2. Cam profile follows original 3406E calibration, ensuring good air exchange and stable fuel consumption
3. Gear is shrink-fitted to camshaft with tight concentricity, minimizing timing drift at high speed
4. Unified assembly standard prevents premature failure of new camshaft caused by reused worn gears or thrust parts

FAQ 

1. Can I separate the gear from 204-0857 and use it alone?
This part number is a pre-matched group. Splitting it will ruin calibrated tolerance, not recommended.

2. Does 204-0857 fit 3406C?
No. 3406C and 3406E differ in valve actuation and timing design. Lift and gear tooth count are not compatible.

3. Can the gear with minor pitting stay in service?
Pitting on gear teeth of this group is not acceptable. Vibration will escalate and cause timing jump and valve collision.

4. What risk if I only replace camshaft and reuse old lifters?
Mismatched wear surface will cause rapid scuffing on cam lobes and repeated failure quickly.