Hydraulic Power Unit; Hydraulic Power Unit Components - Terex Genie TX-34/20 Service Manual

Section 4 • Repair Procedures

Hydraulic Power Unit

5-1

Hydraulic Power Unit Components

The power unit is located under the side cover on the side of the machine opposite of the ground controls.
Index
No. Description
1 Hand pump ...................................................... Auxiliary functions
2 Breather Cap W/Check Valve .......................... Fluid fill / Vents to atmosphere
3 Hose fitting ....................................................... To outrigger extend front circuit ........ 10-12 ft-lbs / 14-16 Nm
4 Manifold Plug ............................................................................................................... 10-12 ft-lbs / 14-16 Nm
5 Diagnostic nipple .............................. A ........... Testing .............................................. 10-12 ft-lbs / 14-16 Nm
6 24V DC electric motor ...................................... Operates hydraulic pump ................. 50 in-lbs / 5.5 Nm
7 Solenoid valve, 3 position 4 way
(open center) ..................................... B ........... Outrigger extend/retract .................... 28-33 ft-lbs / 38-44 Nm
— Coil nut ................................................................................................................................. 60 in-lbs / 6.7 Nm
8 Valve coil .......................................................... Outrigger extend function
9 Valve coil .......................................................... Outrigger retract function
10 Check valve ....................................... C ........... Outrigger circuit
11 Hydraulic filter .................................................. Filters hydraulic fluid leaving system
12 Power unit valve body
13 Pump ................................................................ 1.3 gallons per minute @ 3500 psi
14 Pick-up filter ...................................................... Filters hydraulic fluid entering the pump
15 Tank .................................................................. 2.1 gallons / 8 liters ................................... 50 in-lbs / 5.5 Nm
16 Breather Cap W/Check Valve .......................... Vents tank to atmosphere
17 Relief valve ....................................... D ........... Outrigger system relief ..................... 28-33 ft-lbs / 38-44 Nm
18 Hose fitting ....................................................... To outrigger retract front circuit ......... 10-12 ft-lbs / 14-16 Nm
19 Manifold Plug ............................................................................................................... 10-12 ft-lbs / 14-16 Nm
20 Hose fitting ....................................................... To function manifold "T" .................... 10-12 ft-lbs / 14-16 Nm
21 Relief valve ....................................... E ........... System relief ..................................... 28-33 ft-lbs / 38-44 Nm
22 Check valve ....................................... F ........... Auxiliary pump circuit ....................... 28-33 ft-lbs / 38-44 Nm
23 Hose fitting ....................................................... To function manifold "P" ................... 10-12 ft-lbs / 14-16 Nm
24 Sight gauge ....................................... G ........... Hydraulic fluid level ................................. 106 in-lbs / 12 Nm
4 - 24
Schematic
Item Function
4.9 liters per minute @ 241.3 bar
Genie TZ-34/20
August 2022
Torque
Part No. 825934