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Manifolds and Hydraulic Pumps Section 5 – Procedures
5.8-4 Hydraulic System Relief Valve
Adjustment
To adjust the system relief valve (RV1), you are
required to temporarily adjust the high pressure
setting on the system pump to 228 bar (3300 psi).
Refer to 5.8-3 Hydraulic High Pressure Adjustment.
1. Locate the GP1 port
1
on the main manifold
and remove the cap.
1
2. Connect a pressure gauge (345 bar / 5000 psi)
to the GP1 port.
3. Start the engine from the base control console
and let it run for 2-5 minutes.
4. Steer fully to one direction and then check the
reading on the gauge. Standard pressure should
be 220 bar (3200 psi). Follow the next steps for
adjusting pressure if needed.
5. Locate the system relief valve (RV1)
2
.
2
6. Loosen the lock nut on the system relief valve.
Turn the adjusting stem clockwise to increase
pressure and counterclockwise to decrease
pressure.
7. Tighten the lock nut on the system relief valve
once 210 bar (3050 psi) is observed on the
gauge. You must steer fully in one direction to
activate the pressure reading on the gauge.
8. Reset the system pump to 210 bar (3050 psi).
Refer to 5.8-3 Hydraulic High Pressure
Adjustment.
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