美國威格士片式多路閥

relief valve control poppet and seat
Valve body cracked inside
Spool not moved to full stoke
Repair, clean and readjust.
Disassemble, clean and reassemble.
Replace valve section.
Check travel.
No relief valve action
(High Pressure)
Small particle of dirt plugging orifice in
relief valve sub-assembly
Relief valve sub-assembly installed
backwards.
Remove relief valve and check hole. If
blocked, clear hole.
Install properly.
Load will not hold Oil by-passing between spool and body
Replace valve.
Detent type spools will not stay in
detent position
Worn detent barrel
Weak or broken detent spring
Replace detent barrel.
Replace detent spring.
No motion, slow or jerky action of
hydraulic system
Relief valve not properly set, or stuck in
base and/or worn
Dirt or foreign particles lodged between
 

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