14
CAS440HU Air Compressor Manual Part # 99901339
Underdeck Compressor Installation
Use these instructions as a guide only, due to variations.
1
Position the compressor below the compressor compartment with the belt side to the rear of
the compartment.
2
Lift the compressor base into position so the base is flush with the bottom of the
compartment. Make sure there is clearance within the compartment and no interference is
present. Support the compressor in this position.
3
Using the base as a template, drill eight 17/32" diameter holes through the compartment.
4
Bolt the compressor base to the walls of the compartment using 1/2" grade 5 cap screws, flat
washers and lock nuts.
5
Connect the hydraulic hose from the pump to the relief valve connected to the hydraulic drive
motor on the compressor. See the compressor assembly drawing.
6
Connect the return line to the reservoir. See the compressor assembly drawing.
7
If the compressor is positioned properly, torque all mounting bolts per Torque Data Chart.
8
Connect the air hoses per the compressor assembly drawing.
9
Install the engine speed control as shown and connect hoses from compressor to speed
control.
10
Fill the oil reservoir and open the suction gate valve. Disconnect the pressure hose at the
hydraulic pump. Engage the PTO and turn the vehicle engine with the starter until oil flows
through the pressure side of the pump. Reconnect the pressure hose. Pull out the
compressor switch and open the gate valve to the air receiver. Disengage the PTO and start
the truck. Depress clutch and engage PTO. Release the clutch slowly. It may be necessary
to warm the truck engine so that it will pull at idle RPM. Push in the compressor switch. This
will close the control valve and start the compressor. Allow for warm-up time. Close the gate
valve on the air receiver. This will activate the speed control. Adjust the engine speed
control for proper operating RPM. Check for system leaks and proper operation.
11
Install compressor kill switch. See figure.
-
+
BATTERY
IGNITION
SWITCH
NORMALLY
CLOSED
DOOR
SWITCH
COIL (GAS)
OR
FUEL SOL. (DIESEL)