7C-0667 Caterpillar engine camshaft for engine spare part

Maintenance & Replacement Tips

1. Inspect all roller lifters and cam bearings of the same bank during replacement. Replace worn components with excessive clearance
2. Clean cylinder head galleries and camshaft oil passages thoroughly. Metal debris easily scratches hardened lobe surfaces
3. Follow 3512 service manual strictly for timing alignment. Multiple camshafts are timed together; misalignment causes valve collision
4. Pre-lube before cranking. Monitor exhaust temperature spread and listen for gear housing noise during test run

FAQ 

1. Can 7C-0667 be installed on the right rear bank?
No. Right rear and left rear camshafts have different timing and lift profiles, mixing them breaks engine timing.

2. Does it fit 3516 engine?
No. 3512 and 3516 differ in cylinder layout, cam mounting distance and timing parameters, non-interchangeable.

3. Can the camshaft stay in service with scattered shallow pitting and no crack?
Light isolated pits can be monitored temporarily. Replace it if pitting spreads or spalling occurs to protect roller lifters.

4. What risk if I install new camshaft and reuse old lifters?
Mismatched contact surfaces will trigger rapid lobe pitting and spalling during break-in and lead to early failure.