Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1986VALUE VAN P3500, 7.4 W, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGSTEERING GEAR - POWEROVERHAULROTARY VALVE OVERHAULREASSEMBLY
1986 GMC Value Van P3500, 7.4 W, Standard
Rotary Valve Overhaul: Reassembly
1986 GMC Value Van P3500, 7.4 W, StandardSECTION Reassembly
- Lubricate all valve body components with power steering fluid. Install replacement back-up "O" rings in seal grooves and install replacement seal rings over back-up rings. Take care not to damage seal rings during installation.NOTE: Teflon seal rings may appear to be distorted after installation. However, heat of operation will straighten them.
- Lubricate replacement spool valve damper "O" ring with petroleum jelly. Install on spool valve. Carefully insert spool valve into valve body.
- Push spool valve through valve body until locating pin hole is visible at opposite end of valve body and spool valve is flush with notched end of valve. Install the stub shaft into the spool valve and valve body.
- Be sure stub shaft locating pin is aligned with spool valve locating hole. Align notch in stub shaft cap with stub shaft locating pin and press sub shaft and spool valve into valve body. Install stub shaft cap "O" ring into valve body. See Fig 1 .
CAUTION:
Before installing assembled valve body into gear housing, be sure valve body stub shaft locating pin is fully engaged in stub shaft cap notch. DO NOT
allow stub shaft to disengage from valve body pin.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.