Grove Published 11-10-2014, Control # 524-00 2-45
RT880E SERVICE MANUAL HYDRAULIC SYSTEM
Item Description
23 SB - Swing Brake
24 Drain - Front Steer Control Valve
25 PA - Swing Pilot
26 PB - Swing Pilot
27 GP1 - Gauge Port 1 - Steer Inlet Pressure
28 GP2 - Gauge Port 2 - Steer Load Sense
Pressure
29 GP3- Gauge Port 3 - Swing Brake Foot Pedal
Inlet Pressure
30 GP4 - Gauge Port 4 - Joystick Supply
31 GP5 - Swing Valve Inlet Pressure
32 GP6 - Gauge Port 6 - Return Pressure from
Gear Pump to cooler
33 GP7 - Gauge Port 7 - Gear Pump Outlet to Steer/
Swing Valve
34 GP8 - Gauge Port 8 - Pressure From jack
cylinder Manifold
35 LS-STR - Front Steer Control Load Sense
36 SWV - Swing Valve
37 BS - Brake Supply
38 SWB - Swing Brake Release
Item Description
40 LS-B - Hose Reel Brake Load Sense
42 LS - Load Sense Hoist/Telescope Lift Direction
Valve
44 LS-Aux - Auxiliary Load Sense
47 SH3 - Shuttle Valve - Hose Reel/Telescope
Relief Circuit
49 SH1 - Shuttle Valve - Hose Reel/Telescope
Relief Circuit
50 SV3 - Solenoid Valve - Joystick Supply
51 SV2 - Solenoid Valve - Swing Brake Release
53 PR2 - Pressure Reducing Valve (350 psi) -
Joystick Supply
54 PR1 - Pressure Reducing Valve (250 psi) -
Swing Brake Release
55 RV1 - Relief Valve (3000 psi) - Pump #2 - Inlet
Relief
56 CV1 - Check Valve - Swing
57 SH4 - Shuttle Valve - Hose Reel/Telescope
Relief
58 OR1 - Orifice (ø.156)- Swing
59 CMP1 (2750 psi) - Front Steer Control Valve
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