Procedure J - Front Steer Relief Valve Pressure; Procedure K - Outrigger/Rear Steer Valve Relief; Procedure L - Hydraulic Oil Cooler Fan Motor Control Valve - Manitowoc Grove RT765E-2 Service And Maintenance Manual

HYDRAULIC SYSTEM
5
1
2
Item
1 Steer Priority
2 Swing "A" Port Relief
3 Outlet
4 Swing "B" Relief
5 Swing Inlet Test Port
Procedure J - Front Steer Relief Valve
Pressure
1. Install pressure check diagnostic quick disconnect with
gauge onto test nipple at swing valve test port per
Procedure I.
6659-8
2. Run the engine at full rpm and steer full right or full left
and hold. Check the pressure and adjust the relief valve
Figure 2-13 to 2500 psi ±50 (17.2 MPa ±0.4).
2-28
3
6671-2
FIGURE 2-12
Description
Relief Valve Adjustment
Hydraulic
Swivel
Port #5
FIGURE 2-13
Published 9-04-2014, Control # 422-08
3. Remove the pressure gauge from the swing inlet test
port.
Procedure K - Outrigger/Rear Steer Valve
Relief
1. Install pressure check diagnostic quick disconnect with
gauge onto test nipple at outrigger/rear steer valve
4
pressure check port Figure 2-14.
2. With the boost switch OFF and the engine running at full
rpm, press the extend switch and adjust the outrigger/
rear steer relief valve to 2500 psi ±50 (17.2 MPa ±0.4).
3. Remove pressure gauge from the pressure check port.
Outrigger/rear steer adjustable relief:
Loosen jam nut and turn stem in (CW) to
increase or out (CCW) to decrease
pressure.
Procedure L - Hydraulic Oil Cooler Fan
Motor Control Valve
1. Make sure that machine is up to operating temperature
then unplug oil cooler valve solenoid (located near oil
cooler fan motor) to assure fan is running at full speed.
2. Run the engine at idle and using a photo tachometer
adjust flow control valve until a fan speed of 2400 to
2500 rpm is achieved.
3. Run the engine at full rpm and adjust the relief valve until
a fan speed of 2400 to 2500 rpm is achieved.
4. Shut off engine, remove pressure gauge and plug in the
oil cooler valve solenoid.
RT765E-2 SERVICE MANUAL
7531-1
FIGURE 2-14