224
General Maintenance
Main Control Valve
Main Control Valve Resealing
The following work instructions outline the procedure to reseal the main control valve (or directional
control valve) on the E
XPERT
™.
N
OTE
:
These repairs should be performed only by trained, experienced technicians.
Tools Required
Ratchet
¾” socket
½” socket
6” extension
Torque Wrench
¾” combination wrench
O-ring pick
Large Phillips Driver
Lifting device, minimum 500-lb capacity (overhead winch, shop crane, etc.)
Nylon sling, minimum 500-lb rating
Lint free rags
Petroleum jelly
Parts Required
LabriePlus part number HYJ4104 Section Seal Kit: one kit required for each section (does not
include plug or port relief seals)
LabriePlus part number HYJ04107 Inlet Section Seal Kit: one kit required per valve assembly
Valve Removal
1.
Thoroughly clean the valve, connecting hoses and the area directly surrounding the valve.
2.
Remove the hydraulic tank fill cap to relieve any air pressure from the reservoir.
3.
Remove the hoses.
Label the hoses prior to removal to aid in re-assembly.
4.
Attach the lifting device to the valve using the nylon sling, then using the ¾” socket, 6” extension
and ratchet remove the four ¾” bolts attaching the valve to the body.
5.
Remove the valve and mounting plate.
6.
Drain the oil from the valve and set it on a clean, flat surface.
7.
Using the ½” socket and ratchet, remove the valve mounting plate from the valve.
Valve Resealing
1.
Using the ¾” socket and ratchet, and a ¾” combination wrench, remove the four tie rods holding
the valve assembly together, and remove the tie rods.
Summary of Contents for EXPERT
Page 1: ...EXPERT TM MAINTENANCE MANUAL...
Page 2: ......
Page 3: ...EXPERT MAINTENANCE MANUAL...
Page 10: ...viii Table of Contents...
Page 18: ...8 Introduction...
Page 244: ...234 General Maintenance...
Page 251: ...Lubrication 241 Figure 4 11 Glass compartment lubrication chart optional...
Page 252: ...242 Lubrication Figure 4 12 EXPERT lubrication chart...
Page 264: ...254 Lubrication...
Page 320: ...310 Hydraulic System...
Page 357: ...Troubleshooting 349...
Page 358: ...350 Troubleshooting...
Page 386: ...378 Multiplexing...