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FIGURE 3. CYLINDER HEAD TORQUE SEQUENCE
XVII. Reconnect the 3/4" discharge hose and discharge jumper hose.
XVIII. Install the compressor and connect the wiring.
XIX.
Test the machine.
2. Oil Pump Replacement
I.
Shut down machine and allow to cool for approximately 10 minutes.
II.
Verify entire system pressure is relieved before proceeding.
III.
Remove the bolts and lift off the pump cover.
IV.
With a single edged razor blade, or sharp putty knife, remove the old gasket material. Take care
not to damage the machined surfaces.
V.
Lift the pump out of the cavity.
VI.
Position a new gasket on the rear bearing housing.
VII.
Insert the pump into the cavity. Position the pump slightly to one side, using a common screwdriver.
Wedge the pump into position so that it partially compresses the spring. Note that the driver pin
and slot in pump must be in line.
VIII.
Place the pump cover into position and start two bolts (bolts must be diagonally opposed). Strike
the pump cover with a rubber faced mallet to jar the pump loose. When the tension spring can be
felt against the pump cover, the pump is loose.
Maintenance
If pressure fails to build and the compressor is excessively noisy, check
the valve plate. It may have been installed upside down.
Do not allow the gasket material to fall into the crankcase. Do not nick
the head, cylinder, or crankcase mating faces while removing the old
gasket. Remove all of the old gasket material to provide a smooth,
clean surface for the new gasket. Failure to follow this procedure may
result in the need to reseal the unit later.
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