Clark GEX20 - Control Valve Linkage Disassembly; Hydraulic Control Valve Removal; Preparation for Valve Removal; Valve Removal

Group 30, Hydraulic Control Valve/Lift Circuit
30-5-2 • Hydraulic Control Valve Removal and Replacement SM 765, Sep ’06
Hydraulic Control Valve Removal
IMP
O
RTANT
Keep all hydraulic ports, components, and
fittings completely clean during valve
removal and replacement to prevent any con-
tamination from entering the hydraulic sys-
tem.
Preparation for Valve Removal
1. Park truck in a safe position and fully lower the
upright.
2. Return all controls to neutral, apply the parking
brake, and turn key switch OFF.
3. Move all hydraulic control levers to all working posi-
tions and return them to neutral. Be sure there is no
hydraulic pressure applied to the system by attach-
ments.
4. Remove floor plate.
5. Remove the right cowl cover from under the dash in
the operator’s compartment. See removal and
replacement procedures in Group 38.
6. Air clean the hydraulic valve and fittings.
7. Place a drain pan under the truck and loosen and
remove all hydraulic lines from the valve. Plug the
valve ports. Mark or tag each line as removed to
assure correct position of line at assembly.
8. Cap ends of lines to keep them clean. Tie ends of
lines to truck to prevent loose ends dropping and
leaking oil onto floor
Control Valve Linkage Disassembly
Remove the cotter rings and clevis pins connecting the lift
and tilt (and auxiliary, as applicable) lever rods from the
hydraulic valve spools.
Valve Removal
1. Remove the three hex capscrews mounting the
hydraulic valve to the hydraulic valve mounting
bracket .
2. Remove valve assembly from valve mounting
bracket. See Section 6 for valve overhaul instruc-
tions.
N
O
TEN
O
TEN
O
TEN
O
TEN
O
TE
Be sure to clean up any oil spills and dry the
floor to prevent accidents.
To upringt
Feed Line
from Pump
Tilt Cylinder
Lines
Return Line
to Sump
Clevis Pin
Cotter Pin
Valve Spool
Hydraulic Valve mounting
Bracket