Lull 6K Service Manual - Manual (Page 228)

Supply, Pressure, and Return Hydraulics
5-84 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Removal
Mid-Inlet Control Valve
Fig. 5-53: Mid-Inlet Control Valve Installation
(Ref. Fig. 5-53) The following procedure describes removal of the mid-inlet
control valve.
1. Follow preparation procedures as outlined in Section 3.
2. Install a brake pressure diagnostic test gauge onto the “Brakes”
diagnostic port (see Fig. 5-58).
3. While watching the test gauge, press the brake pedal numerous times
until the pressure gauge reads 0 psi. Remove the test gauge and cap
the diagnostic port.
4. Tag and disconnect all hydraulic lines from control valve fittings. Cap all
hoses, tubes, and fittings. Tag all fittings.
5. (Ref. Fig. 5-32) Remove three (3) capscrews and lockwashers
securing the mid-inlet control valve to the valve plate.
6. Using appropriate lifting devices, lift the control valve from valve plate
and take to an appropriate location for disassembly and cleaning.
K
1142
Capscrew
Lockwasher
Valve Plate
Control Valve