Pilot-Operated (Poppet Style) Check Valve Inspection - Western HTS Mechanic's Manual

PILOT-OPERATED (POPPET STYLE) CHECK VALVE INSPECTION

1. Remove O-ring boss plug,
spring, and poppet.
2. Remove O-ring boss plug,
spring, and spool with O-ring.
Use long/slender needle-nosed
pliers to remove spool.
3. Inspect springs, poppet, spool,
O-rings, and poppet seat for
wear, damage, or contamination.
4. If the valve manifold block has a
steel poppet seat, use a strong
pencil magnet to push and pull
on the seat. If the seat moves at
all, reset with poppet seat tool
(PN 28530). If the problem is
not corrected, replace the valve
block.
5. Re-oil O-rings, install spool fully
into bore. Spool must insert
smoothly.
6. Install poppet, springs, and
O-ring boss plugs. Torque O-ring
boss plug to 60 in-lb.
Lit. No. 41467, Rev. 01
O-Ring Boss Plug
Spring
Poppet
Spool
Valve Manifold
Block
74
April 15, 2021