Hydraulic Power Unit; Hydraulic Power Unit Components - Genie TMZ-34/19 Service Manual

Section 4 • Repair Procedures
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Hydraulic Power Unit

6-1

Hydraulic Power Unit Components

The hydraulic power unit is located under the side cover opposite the ground control side of the machine.
Index
No. Description
1 Hydraulic return filter ........................................ Filters oil returning to the tank
2 Diagnostic nipple ............................... D ........... Testing .................................................. 155 in-lbs / 17.5 Nm
3 Proportional valve, N.C. with
manual over ride knob ....................... E ........... Allows lowering of the boom ................. 155 in-lbs / 17.5 Nm
— Coil nut (item E) .................................................................................................................... 5-7 ft-lbs / 7-9 Nm
4 24V DC electric motor ...................................... Operates hydraulic pump
5 Motor bearing ................................................... Aligns motor shaft into pump
6 Motor seal ......................................................... Seals motor from contaminants
7 Pressure relief valve .......................... F ........... System relief
8 Pump ................................................................ 0.75 gallons per minute @ 3000 psi, minimum
9 Pick-up filter ...................................................... Filters hydraulic fluid entering the pump
10 O-ring ................................................................ Tank to pump seal
11 Sight gauge ...................................................... Hydraulic fluid level
12 Tank .................................................................. 6 quarts / 5.7 liters ..................................... 40 in-lbs / 4.5 Nm
13 Drain plug ......................................................... Drains tank ............................................... 250 in-lbs / 28 Nm
14 Breather cap ..................................................... Vent tank
15 Check valve ....................................... G ........... One way valve for pump output ............ 155 in-lbs / 17.5 Nm
4 - 34
Schematic
Item Function
2.84 liters per minute @ 207 bar, minimum
TMZ-34/19
June 2005
REV B
Torque
Part No. 52075