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Section 5 – Procedures Hydraulic System Adjustments
5.3-3 Steer Relief Pressure Adjustment
1. Extend transverse deck to service position, then
raise the service access door and secure in
position with the prop rod provided.
2. Locate system pressure test port on power pack
manifold. Refer to Section 3.8 Power pack and
Port Identification for location.
3. Install a calibrated 5000 PSI gauge to the system
pressure test port.
4. Remove platform control box from guardrail and
locate it in the proximity of the work area of the
power pack.
5. At the main manifold, loosen locknut on steer
relief valve R2. Refer to Section 3.14 for location.
6. Select drive with the Lift/Drive switch on the
platform control box.
7. Engage steer right and hold. Engage diagnostic
switch and hold.
8. Observe reading on gauge when steering is
at full stroke. Adjust steer relief valve R2 value
at 1500 psi. Turn the stem on the relief valve
clockwise to increase pressure. Turn the stem
counterclockwise to decrease pressure.
9. Release steer switch, diagnostic switch and then
tighten the locknut.
10. Remove the gauge from the system pressure
test port.
11. Store prop rod back to its holder, then lower
service access door and secure it. Push the
transverse deck back to the working position.
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