Maintenance Operation & Maintenance Manual
22560858 79
Speed & Pressure Regulation Adjustment
Normally, regulation requires no adjusting, but if correct adjustment is lost, proceed as follows:
Refer to the diagram above.
A Adjusting screw
Start the machine (Refer to STARTING INSTRUCTIONS in the OPERATING
INSTRUCTIONS section of this manual).
Adjust the service valve on the outside of the machine to maintain normal operating discharge
pressure (refer to GENERAL INFORMATION) and full speed position. If the tachometer
moves away from the full speed position before normal operating discharge pressure is
attained, then turn the adjusting screw ‘A’ clockwise to increase the pressure. Optimum
adjustment is achieved when the throttle just moves from its full speed position and the
pressure increases slightly.
Close the service valve. The engine will slow to idle speed.
CAUTION
!
Never allow the idle pressure to exceed maximum allowable pressure
(refer to GENERAL INFORMATION).
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