Overview
Valve stem sub-assembly for the HydraMaster stainless solution valve, listed as Valve Stem Sub Assembly.
The stem carries the plunger and its sealing o-rings. Where a valve weeps or will not shut cleanly and the spring is sound, the stem assembly is the usual replacement.
What it contains
- Plunger 107-129 (HM solution valve)
- Ring keeper 139-003
- O-ring 097-010 — large, valve plunger
- O-ring 097-022 — small, solution valve flow meter
- Snap ring 139-004
Where it is fitted
- Solution valve assembly, with valve body 600-012-001, spring 155-003 and brass cap 027-001
Identifying the right part
CCW part codes are the HydraMaster part number with the 000- prefix removed — this item is HydraMaster P/N 000-600-012-002.
HydraMaster truckmounts share components across models and production years. If you are ordering for an existing machine, send us the model and serial number from the data plate and we will check it against the parts list for your machine.
Confirmed against the HydraMaster CDS 4.2 / 4.7 machine assemblies and parts lists. Fitment to other HydraMaster models has not been verified from a parts list — ask us if you are ordering for a different machine.
STEM ASSEMBLY HYDRAMASTER SOLUTION VALVE
Stem assembly or o-ring kit?
Two parts service the same valve and they are not the same repair.
- O-ring kit 078-019 — where the seals are worn but the plunger and stem are sound. The cheaper repair, and the right one most of the time.
- This stem assembly — where the plunger is scored or pitted, or the ring keeper or snap ring is damaged. New seals on a scored plunger will not last.
Inspect the plunger before you order. If the sealing surface is marked, the o-ring kit will buy you weeks rather than years.
Related parts
- Spring, HydraMaster Solution Valve (155-003) — the third wear item in the same valve
- Repair O-Ring Kit, Solution Valve (078-019)
Frequently asked questions
Does it include the o-rings?
Yes — 097-010 (large, plunger) and 097-022 (small, flow meter) are both part of the assembly, along with the plunger, ring keeper and snap ring.
Should I replace the spring at the same time?
If the valve was slow to shut off rather than weeping, yes. Going back into a valve for a second part costs more in downtime than the spring is worth.
Do you stock the complete valve?
Not as a listed line. Tell us your machine model and serial number and we will work out what you need.
