MAINTENANCE
27
9/215 9/230 9/255 9/300 10/170 12/170 12/235 17/235 21/215
HP600 VHP600 XP750 XP800 VHP825 XP900 XP1060 XHP760 XHP825
9/215 9/230 9/255 9/300 10/170 12/170 12/235
XP750 XP800 XP900 XP1060 HP600 VHP600 VHP825
SPEED AND PRESSURE REGULATION ADJUSTMENT
9/215 9/230 9/255 10/170 12/170 12/235
Normally, regulation requires no adjusting, but if correct adjustment
is lost, proceed as follows:
Refer to the diagram above.
A: Throttle arm
B: Adjusting screw
Start the machine (Refer to STARTING INSTRUCTIONS in the
OPERATING INSTRUCTIONS section of this manual).
Inspect the throttle arm ‘A’ on the engine governor to see that it is
extended in the full speed position when the engine is running at
full–load speed and the service valve is fully open. (Refer to the
GENERAL INFORMATION section of this manual).
Adjust the service valve on the outside of the machine to maintain
normal operating discharge pressure (refer to GENERAL
INFORMATION). without the throttle arm moving from the full speed
position. If the throttle arm moves away from the full speed position
before normal operating discharge pressure is attained, then turn the
adjusting screw ‘B’ clockwise to increase the pressure. Optimum
adjustment is achieved when the throttle arm just moves from its full
speed position and the pressure increases slightly.
Adjust the idle speed by moving bracket ‘C‘. Adjust full speed by
means of the ball joint ‘D‘.
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).
