October 2008 "3072ES / 3772ES / 3772ES HD" Service & Parts Manual
Page 4-36
Main (RV3)
• Disconnect forward or reverse coil of drive valve.
• Energize drive function by moving joystick in the direction of the already disconnected coil.
• Hold the switch for 10 seconds to get an accurate reading on the pressure gauge.
• If pressure is LOW, adjust main relief valve ¼ turn clockwise and recheck.
• If pressure is HIGH, adjust main relief valve ¼ turn counterclockwise and recheck.
• Repeat until correct.
Lift Relief (RV1)
• Energize the platform to full extension with no load on platform.
• Hold the switch for 10 seconds to get an accurate reading on the pressure gauge.
• If pressure is LOW, adjust lift relief valve ¼ turn clockwise and recheck.
• If pressure is HIGH, adjust lift relief valve ¼ turn counterclockwise and recheck.
• Repeat until correct.
Steering Relief (RV2)
• Energize the steering to full left.
• Hold the switch for 10 seconds to get an accurate reading on the pressure gauge.
• If pressure is LOW, adjust steering relief valve ¼ turn clockwise and recheck.
• If pressure is HIGH, adjust steering relief valve ¼ turn counterclockwise and recheck.
• Repeat until correct.
Lift Cylinder Overpressure Valves (RV4) 3772ES Only
The Lift Cylinder Overpressure valves are located on each of the lift cylinder valve blocks on the
3772ES model only.
Proper valve adjustment is not possible by the consumer. Considering their importance to the safe
operation of the machine, they must not be tampered with. If the valve is suspected to be out of
adjustment or tampered with, it must be replaced.
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