Lull 6K Service Manual - Manual (Page 193)

Supply, Pressure, and Return Hydraulics
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 5-49
Removal
Multi-Spool Control Valve
Fig. 5-32: Multi-Spool Control Valve Installation
(Ref. Fig. 5-32) The following procedure describes removal of the
multi-spool control valve.
1. Follow preparation procedures as outlined in Section 3.
2. Install brake pressure diagnostic port test gauge onto “Brakes”
diagnostic port (see Fig. 5-58).
3. While watching test gauge, press brake pedal numerous times until
pressure gauge reads 0 psi. Remove test gauge and cap diagnostic
port.
4. Tag and disconnect all hydraulic lines and tubes from control valve
fittings. Cap all hoses, tubes, and fittings.
5. (Ref. Fig. 5-32) Remove three (3) capscrews and lockwashers
retaining control valve to valve plate.
6. Lift control valve from valve plate.
Installation
Multi-Spool Control Valve 1. (Ref. Fig. 5-32) Position control valve on valve plate. Secure with three
(3) capscrews and lockwashers.
2. Connect all hydraulic hoses and tubes to fittings on control valve.
Torque per instructions in Section 3.
3. Start engine and repeatedly cycle all hydraulic circuits controlled by
valve to remove air from system.
Control Valve
Capscrew
Lockwasher
Valve Plate
K
1056