Specifications

Vehicle System Disassembly & Assembly 65
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
Spring Slot
Control
Spool
Marks
Spring Slot
Identification
Control Sleeve
IDCD291S