Overview – V.COL HD8 ISM CM876 INTRO 4091926 Series
If you run Cummins ISM (CM876) engine valvetrain as the valve collet, the Cummins V.COL HD8 ISM CM876 INTRO 4091926 and its series variants give you flexible sourcing without compromising fit.
Parts Characteristics
A valve collet (valve keeper) that locks the valve-spring retainer to the valve stem in the ISM CM876 valvetrain. It holds the spring stack under load, so a correct, matched collet keeps the valve seated and prevents the spring launching under a broken keeper.
Applicable Models & Applications
Used on Cummins ISM (CM876) valvetrains specifying this collet. Match the collet angle and stem size against your old part – valve collets differ in how they grip the stem and how the halves seat together.
Maintenance & Replacement
Replace collets as a matched pair whenever the valvetrain is opened. A single reused or stretched collet can walk out from the retainer and drop a valve into the cylinder.
Never re-use a collet that shows a grooved or polished grip face. The grip is what holds the spring; once it has taken a set, the next closing event can release it.
Confirm the collet seats fully into the retainer groove before fitting the spring. A collet one step short leaves the valve loosely retained and the engine will not hold a setting.
Keep the common ISM (CM876) valve collets on the bench. They cost little, they are load-critical, and they are exactly the part missing when a valve job needs finishing today.
Price Reference (USD)
The V.COL HD8 ISM CM876 INTRO 4091926 generally falls in the USD 5-25 bracket, with expedited freight quoted separately.
Value & Service
We supply brand-new ISM (CM876) valve collets with the stem fit confirmed against your Cummins engine, so the valvetrain stays locked and seated.
The V.COL HD8 ISM CM876 INTRO family includes CM876; we can cross-check which one matches your serial number.
Racer Machinery maintains a deep inventory of Cummins General Parts, and the V.COL HD8 ISM CM876 INTRO 4091926 is available with same-week dispatch for urgent repairs.
