Inspect
Inspect the lift/lower control valve section mating
surfaces and any open bores for damage. If damage
is found, replace the lift/lower control valve section.
If the spool has been removed, inspect the spool
and the bore for damage. If damage to either the
spool or the bore is found, replace the lift/lower con-
trol valve section.
NOTE:
If the lift/lower control valve section is not
to be reassembled immediately, coat surfaces with
clean hydraulic oil to prevent the possibility of rust.
Cover the lift/lower control valve section with a
clean, dry, lint-free cloth to prevent the possibility
of contaminants entering the lift/lower control
valve section.
Assemble
1.
Install new O-ring on load check valve. Install
poppet, O-ring, spring, and load check valve on
lift/lower control valve section. See Figure 9.
2.
Install new O-ring on plug. Install washer,
spring, and socket head plug on top of lift/lower
control valve section. See Figure 9. Tighten
plug to 81 ±8 N•m (60 ±6 lbf ft).
3.
Install washer, backup ring, piston, spool, and
spring on bottom of lift/lower control valve sec-
tion. See Figure 9.
4.
Install new O-ring on plug. Install socket head
plug on bottom of lift/lower control valve sec-
tion. See Figure 9. Tighten plug to 81
±8 N•m (60 ±6 lbf ft).
5.
Install backup rings and O-rings on two propor-
tional pressure-reducing valves (PPRV). Install
two PPRV and four socket head capscrews in
top and bottom of lift/lower control valve sec-
tion. Tighten capscrews to 14 ±1 N•m (120
±12 lbf in).
Install
1.
Install new O-rings on side of transition control
valve section.
2.
Install lift/lower control valve section on transi-
tion control valve section.
3.
Install the tilt control valve section. See Tilt
Control Valve Section, Install.
4.
Install the auxiliary control valve section. See
Auxiliary Control Valve Section, Install.
5.
Install the outlet control valve section. See Out-
let Control Valve Section, Install.
Transition Section
Remove
1.
Remove the outlet control valve section. See
Outlet Control Valve Section, Remove.
2.
Remove the auxiliary control valve section(s).
See Auxiliary Control Valve SectionRemove.
3.
Remove the tilt control valve section. See Tilt
Control Valve Section, Remove.
4.
Remove the lift/lower control valve section. See
Lift/Lower Control Valve Section, Remove.
5.
Remove four tie rods from the transition control
valve section.
Disassemble
CAUTION
The transition section is equipped with a clipper
relief valve. DO NOT disassemble or adjust the
clipper relief valve. Removing the tamper proof
cap and disassembling and/or adjusting the clip-
per relief valve will void and/or cancel any warran-
ties. Contact your dealer for more information.
CAUTION
When removing the emergency load lowering
valve, use care to not damage the tip of the emer-
gency load lowering valve.
NOTE:
Disassemble the transition control valve
section only as needed to accomplish the repairs re-
quired.
Remove the emergency load lowering valve from
the transition section. Remove and discard the O-
ring from valve. See Figure 10.
Clean
Clean the transition control valve section using a
lint-free cloth.
Main Control Valve Repair
2000 SRM 1899
14