Hydraulic Power Unit; Hydraulic Power Unit Components - Genie TZ-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 fi ll / Vents to atmosphere
3 Hose fi tting ........................................................ 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 fi lter ................................................... Filters hydraulic fl uid leaving system
12 Power unit valve body
13 Pump ................................................................. 1.3 gallons per minute @ 3500 psi
14 Pick-up fi lter ...................................................... Filters hydraulic fl uid 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 fi tting ........................................................ To outrigger retract front circuit .......... 10-12 ft-lbs / 14-16 Nm
19 Manifold Plug ................................................................................................................ 10-12 ft-lbs / 14-16 Nm
20 Hose fi tting ........................................................ 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 fi tting ........................................................ To function manifold "P" ..................... 10-12 ft-lbs / 14-16 Nm
24 Sight gauge ........................................ G ........... Hydraulic fl uid level .................................... 106 in-lbs / 12 Nm
25 Red Beaded Security Tie
4 - 24
Schematic
Item Function
4.9 liters per minute @ 241.3 bar
Genie TZ-34/20
January 2016
Torque
Part No. 825934