September 2016
Service Manual
Hydraulic Power Unit
Part No. 38139
AWP Super Series • IWP Super Series
81
3-3
Hydraulic Power Unit - DC Models
(to SN AWP03-27401 and IWP03-5122)
Index No. Description
Function
1
12V DC electric motor
12V DC standard duty 1 terminal
180 A at 2650 psi / 183 bar
2
Motor starter solenoid
Power supply to electric motor
3
Relief
valve
Lift relief
4
Solenoid operated N.O. dump valve
Diverts pump output back to tank during motor start up
5
10V DC coil
Activates N.O. dump valve
6
Hydraulic tank
3 quarts / 2.8 liters
7
Drain plug
Drains hydraulic tank
8
Sight gauge
Hydraulic fluid level
9
Breather cap
Hydraulic tank vent/filler
10
Suction strainer
Filters hydraulic fluid
11
O
-ring
Seals tank
12
Pump
0.7 to 1 gpm at 2000 psi /2.6 to 3.76 L/min at 138 bar
13
Check valve
Pump output
14
Motor seal
Seals motor from
contaminants
15
Motor bearing
Aligns motor shaft into pump