Crown GMTS-30 Installation & Operation Manual page 13

Gas Skillets
Relief Valve
The relief valve is located underneath an aluminum hexagon cover on the side of the custom manifold block. This relief
valve is factory set to 825 P.S.I. and locked and should not be adjusted.
If adjustments are necessary, remove the hexagon cover which will give access to the relief valve screw. With the
pump running, and with a suitable flat blade style screwdriver, rotate the screw clockwise to increase pressure, and
anti clockwise to decrease pressure. While this operation is being carried out some oil will leak down the threads of the
adjusting screw.
To obtain the pressure required, a pressure gauge will have to be located in the circuit. The best location is on the
cylinder hose. To set the pressure, energize the solenoid to extend the cylinder fully and thus "deadhead" the system. The
pressure can be set as indicated above. When adjustment is complete, replace the hexagon cover. This will seal the relief
valve area. The actual factory set pressure is noted on the label and should not be exceeded as this affects the HP draw
on the electric motor.
Flow Control
It should be noted that if the cylinder speed is restricted by the flow control valves, the balance of oil not
delivered to the cylinder will go over the relief @ 825 P.S.I. which will cause unwanted heat in the reservoir.
There are two flow control valves mounted on the power unit and located on the solenoid valve subplate. The flow
control valves will restrict the capacity of oil passing through them when the knurled knob is screwed in - in a clockwise
direction. This action will reduce the linear speed of the cylinder. Turning the flow control valve adjustment in the opposite
direction - anti clockwise, will increase the speed of the cylinder. One flow control valve (right side) will allow adjustment
of the extension speed (travel speed should be set at minimum 20 seconds), the other (left side) the retraction speed.
(Retraction speed should be set at minimum 10 seconds).
INSTALLATION & OPERATION MANUAL 10094 REV 0 (08/21)
! IMPORTANT !
Maintenance
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