Mec 3072RT, Service Manual

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"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications March 2008
Page 4-11
Co u nter ba l a nce
V a lve s
Steering Relief (RV2)
The steering Relief valve is located on the left side, lower of the valve manifold. It will be
necessary to remove the cap from the relief valve if adjustment is necessary. REMOVING THE
CAP WHILE THE ENGINE IS RUNNING WILL RESULT IN OIL LEAKAGE.
To check Steering Relief valve setting, operate steer in one direction. While maintaining the steer
command, record the reading on the gauge.
Lift Cylinder Overpressure Valves (RV4) 3772RT Only
The Lift Cylinder Overpressure valves are located on each of the lift cylinder valve blocks on the
3772RT 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.
Setting Counterbalance Valves
1. Loosen the locknut on one of the valves.
2. Turn the adjustment screw counterclockwise (to the left) until it reaches the internal stop
and the screw will turn no further.
3. Turn the adjustment screw clockwise (to the right) 2¾ turns.
4. Tighten the locknut while holding the adjustment screw in position to prevent it from
rotating.
5. Repeat steps 1 through 4 on the other Counterbalance valve.
6. Adjustment is complete.