Main Control Valve; Main Control Valve Resealing - Labrie EXPERT Maintenance Manual

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
N : These repairs should be performed only by trained, experienced technicians.
OTE
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.
™.
XPERT