Vehicle Systems Disassembly & Assembly 34
Assemble Steering Unit
Check all mating surfaces. Replace any parts that
have scratches or burrs that could cause leakage.
Clean all metal parts in clean solvent. Blow dry with air.
Do not wipe dry with cloth or paper towel because lint
or other matter can get into the hydraulic system and
cause damage. Do not use a coarse grit or try to file or
grind these parts.
NOTE: Lubricate all seals with clean petroleum jelly
such as Vaseline.
Do not use excessive lubricant on seals for meter
section.
Refer to parts listings covering your steering unit when
ordering replacement parts. A good service policy is to
replace all old seals with new seals.
1. Use a needle nose pliers to lower check ball
retainer into check valve hole of housing. Make
sure retainer is straight (not tilted on edge) in
housing.
2. Install check ball in housing
3. Lubricate 9.3 mm [.36 in.] ID seal and 7.7 mm
[.30 in.] ID seal. Install seals on check ball seat
as shown.
4. Lubricate check ball seat and seals thoroughly
before installing seat in housing. When installing
seat do not twist or damage seals. Install check
ball seat in housing, insert open end of seat first.
Push check ball seat to shoulder of hole.
5. Install set screw. Use a 1/4 inch hex key to
torque set screw to 11 N·m [100 lb·in]. To prevent
interference make sure top of set screw in slightly
below housing mounting surface.
6. Assemble spool and sleeve carefully so that the
spring slots line up at the same end. Rotate spool
while sliding parts together. Some spool and
sleeve sets have identification marks, align these
marks. Test for free rotation. Spool should rotate
smoothly in sleeve with finger tip force applied at
splined end.
7. Bring spring slots of both parts in line and stand
parts on end of bench. Insert spring installation
tool through spring slots of both parts. Position 2
pairs of centering springs on bench so that
extended edge is down and arched center
section is together. In this position, insert one end
of entire spring set into spring installation tool,
with spring notches facing sleeve.
8. Compress extended end of centering spring set
and push into spool sleeve assembly withdrawing
installation tool at the same time.
9. Center the spring set in the parts so that they
push down evenly and flush with the upper
surface of the spool and sleeve.
10. Install pin through spool and sleeve assembly
until pin is flush at both sides of sleeve.
IDCD289S
Check Ball
Check Ball
Seat
IDCD290S
Sprin
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