Manitowoc Grove RT880E User Manual

Grove Published 11-10-2014, Control # 524-00 2-21
RT880E SERVICE MANUAL HYDRAULIC SYSTEM
2
PRESSURE SETTING PROCEDURES
The following procedures should be used to properly check,
adjust and set the hydraulic system pressures.
The following equipment is required for checking the
hydraulic pressure settings.
• Three dial gauge 0-5000 psi (0-34.5 MPa)
• Pressure check diagnostic quick disconnect—Grove
P/N 9999101806 and straight adapter fitting P/N
7447040401
• ORFS reducers as required to attach work port hoses to
the gauge.
NOTE: When checking the directional control valve relief
settings, unless otherwise specified, start with the
engine at idle RPM and move the controller to its
fully stroked position. Then slowly accelerate the
engine to the specified RPM. Read gauge and
make adjustments to specified setting.
When checking the outrigger relief valve setting,
start with the engine at idle RPM and activate and
hold the extend switch. Then slowly accelerate the
engine to the specified RPM. Read gauge and
make adjustment as required.
Table 2-2
Valve Pressure Setting Table
Valve To Be Set
Pressure
Setting PSI
(MPa)
Tolerance
PSI (MPa)
Adjustment Location
Hoist(s) & Lift 4000 (27.6) ± 50 (0.4) Pump 3 Piston Pump (see Figure 2-10)
Telescope Extend 2800 (19.4) ± 50 (0.4) Main Directional Control Valve Port
Relief (see Figure 2-11)
Telescope Retract 3200 (22.1) ± 50 (0.4) Main Directional Control Valve Port
Relief (see Figure 2-11)
Outrigger Extend & Retract 2000 (13.8) ± 50 (0.4) Outrigger Control Manifold
(see Figure 2-12)
Hyd/Trans. Oil Cooler Motor 3000 (20.7) +0/-100
(+0/-0.8)
Outrigger Control Manifold (see
Figure 2-12)
Service Brake High Charge Limit 2320 (17.4) +72/-145
(+0.5/-1.00)
Dual Accumulator Charge Valve (see
Figure 2-13)
Service Brake Low Charge Limit 1950 (13.5) ±145 (±1.00) Dual Accumulator Charge Valve (see
Figure 2-13)
Accumulator Pre-charge 1500 to 1550
(10.3 to 10.7)
See Range Accumulator (see Figure 2-14)
Front Steer 2600 (18.0) ± 50 (0.4) Front Steer, Swing & Accessory
Manifold (see Figure 2-9)
Swing "Left" Relief 2400 to 2550
(16.6 to 17.6)
See Range Front Steer, Swing & Accessory
Manifold (see Figure 2-9)
Swing "Right" Relief 2400 to 2550
(16.6 to 17.6)
See Range Front Steer, Swing & Accessory
Manifold (see Figure 2-9)
Swing Brake Release Pressure 250 to 300
(1.7 to 2.1)
See Range
Front Steer, Swing & Accessory
Manifold (see Figure 2-9)
Controller Supply 350 to 400
(2.4 to 2.8)
See Range
Front Steer, Swing & Accessory
Manifold (see Figure 2-9)
*Counterweight Removal Extend
1000 (6.91) ± 100 (0.8)
Counterweight Removal Valve (see
Figure 2-15)
*Counterweight Removal Retract
1800 912.5) ± 100 (0.8)
Counterweight Removal Valve (see
Figure 2-15)

Manitowoc Grove RT880E Specifications

General

Brand	Manitowoc
Model	Grove RT880E
Category	Construction Equipment
Language	English