1988 JEEP CHEROKEE lock
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Install input shaft seal with spring in seal facing adjuster plug.
2) Install dust seal into adjuster plug. Rubber face of seal
must face away from plug. Install retainer ring. Install adjuster plug
"O" ring.
3) Assemble thrust bearing, thrust bearing race, and thrust
bearing spacer on adjuster plug. Using a brass or wooden dowel, press
bearing retainer into needle bearing bore.
RACK/PISTON & WORM
Disassembly
Remove worm, lower thrust bearing and bearing races from rack
piston. Remove piston ring and back-up "O" ring from rack/piston.
Remove ball return guide clamp, ball return guide and all ball
bearings from rack/piston.
Inspection
1) Clean and dry all parts. Inspect worm and rack/piston
grooves for scoring. Inspect ball bearings for damage. If any ball
bearings are damaged, replace entire set. Check ball guides for
pinching of ends.
2) Inspect lower thrust bearing races for cracking, scoring,
or pitting. Replace wormshaft and rack/piston as an assembly if either
part is damaged. Inspect rack/piston teeth for chips, cracks, dents or
scoring.
Reassembly
1) Install "O" ring and piston ring onto rack/piston using
care not to twist them. Install worm into rack/piston until worm is
against piston shoulder. Install ball bearings into rack/piston while
slowly rotating worm counterclockwise.
NOTE: See RACK PISTON & WORM ASSEMBLY BALL BEARINGS table for
number of balls to be installed. BE SURE to install light
and dark colored balls alternately, as Black balls are
.0005" smaller than Silver balls.
2) Install correct number of balls in ball guide. Bearings in
guide must be in sequence with bearings in rack/piston. Hold balls in
place with chassis lubricant and install return ball guide assembly
into position.
3) Install clamp and tighten attaching bolts. Alternate light
and dark colored balls when installing. See Fig. 10. Insert
rack/piston arbor into rack/piston until it contacts worm. Maintain
pressure on arbor, and back worm out of rack/piston. DO NOT allow ball
bearings to drop out of circuits.
RACK PISTON & WORM ASSEMBLY BALL BEARINGS TABLE
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Application Rack/Piston Guide
Jeep ...................... 18 ....................... 6
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Page 1059 of 1378
Fig. 10: Installing Ball Bearing into Rack/Piston Assembly
ROTARY VALVE
NOTE: Complete valve assembly is balanced during assembly. If
replacement of any part other than rings or seals is
necessary, replace complete assembly.
Disassembly
1) Remove and discard stub shaft cap "O" ring. Invert valve
and lightly tap end of stub shaft against wood block until shaft cap
is free of valve body. Pull stub shaft outward until drive pin hole is
visible. Depress the pin to remove the stub shaft from the valve body.
See Fig. 11 .
NOTE: DO NOT pull shaft any further than 1/4" (6 mm) or spool
valve may become cocked in valve body.
Page 1063 of 1378
housing ball plug for fluid leakage. Seat ball plug with blunt punch.
2) Spray ball area with Loctite Solvent 7559 and dry with
compressed air. Cover ball area with Loctite Sealant 290. Allow
sealant to cure for 2 hours before assembling gear.
3) Inspect all retaining ring, bearing and seal surfaces in
housing. Replace housing if any surface is worn or damaged.
Reassembly
1) Working from upper end, press a new bearing into housing
until it is seated .030" (.76 mm) below shoulder in housing bore.
Lubricate new seal with power steering fluid.
2) Install single lipped seal and spacer washer only far
enough to provide clearance for next seal, washer and retaining ring.
DO NOT bottom seal against housing counterbore.
3) Install double lipped seal and steel washer. Install
retaining ring. DO NOT allow seals to contact one another. To ensure
proper seal action, be sure there is clearance between them.
4) If port seat was removed, position new spring, check
valve, and a new seat over opening in housing. Drive into place using
a brass drift.
TORQUE SPECIFICATIONS
CHEROKEE, COMANCHE, WAGONEER & WRANGLER
TORQUE SPECIFICATIONS (CHEROKEE, COMANCHE, WAGONEER & WRANGLER) \
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Application Ft. Lbs. (N.m)
Adjuster Plug Lock Nut .......................... 80 (108)
Gear Housing-to-Frame Attaching Bolts ........... 75 (102)
Pitman Arm Attaching Nut ....................... 185 (250)
Rack Piston End Plug ............................. 50 (68)
Sector Shaft Adjuster Lock Nut ................... 33 (45)
Side Cover Bolts ................................. 45 (60)
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GRAND WAGONEER & "J" TRUCK)
TORQUE SPECIFICATIONS (GRAND WAGONEER & "J" TRUCK) \
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Application Ft. Lbs. (N.m)
Adjuster Plug Lock Nut .......................... 85 (116)
Gear Housing-to-Frame Attaching Bolts ............... (95)
Pitman Arm Attaching Nut ....................... 185 (250)
Rack Piston End Plug ............................ 75 (102)
Sector Shaft Adjuster Lock Nut ................... 33 (45)
Side Cover Bolts ................................. 40 (54)
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Page 1064 of 1378
\003
STE ER IN G K NUCKLE S - 4 W D
1988 J e ep C hero ke e
1988 4WD Steering Knuckles
ALL MANUFACTURERS
DESCRIPTION
Open type steering knuckles are used on all models. Open
type knuckles provide sharper turning angle, which will decrease
vehicle turning radius. Axle shafts are free floating. Depending upon
vehicle model, steering knuckles can be attached to axle housing by
either ball joints or roller bearings and king (pivot) pins.
OVERHAUL
BALL JOINT TYPE
Disassembly
1) Raise vehicle and support securely. Remove wheels. Remove
brake caliper and rotor. If equipped, remove locking hubs. See
appropriate LOCKING HUBS article in DRIVE AXLE section.
2) Disconnect tie rod end from steering knuckle. Remove
spindle nuts and lightly tap spindle with soft face hammer to free it
from steering knuckle. Pull out axle shaft assembly.
3) Clean all components with solvent and dry with compressed
air. Inspect all parts for burrs, chips, wear, flat spots or cracks.
Replace all damaged or worn parts.
NOTE: When aligning upper ball joint nut to install cotter pin,
always tighten nut to align. Never loosen nut to align holes.
Reassembly
To reassemble, reverse disassembly procedure. Torque all
fittings to specifications.
Fig. 1: Exploded View of Steering Knuckle Assembly
ADJUSTMENT
Page 1065 of 1378
NOTE: All other models are not adjustable.
BALL JOINTS
Jeep, Truck & Wagoneer
1) Raise vehicle and remove front wheels. Disconnect
steering damper and connecting rod. Remove cotter pin from right side
tie rod retaining nut. Rotate steering knuckles through complete arc
several times.
2) Place torque wrench on right side tie rod retaining nut.
Torque to turn knuckles through complete arc should not be more than
25 ft. lbs. (34 N.m).
3) If turning effort is excessive, disconnect tie rod ends
at knuckles. Measure turning effort of right and left side knuckles.
Individual turning effort should not be more than 10 ft. lbs. (14
N.m).
4) If individual turning effort is more than specified,
replace upper ball joint split ring seat. If turning effort is more
than 10 ft. lbs. (14 N.m) after split ring seat replacement, ball
joints will have to be replaced.
TURNING ANGLE
Truck & Wagoneer
1) Turning angle stop screws are located at rear of steering
knuckle, just above axle centerline. To adjust, loosen lock nut on
turning angle stop screw. Jeep turning angle is not adjustable.
2) Using turntable to measure angle, adjust stop screw to
obtain specified angle. Tighten lock nut without changing setting.
TURN ANGLE ADJUSTMENT
TURNING ANGLE ADJUSTMENT TABLE \
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Application Left Right
Wheel Wheel
Jeep
Cherokee,
Comanche,
& Wrangler .......... ( 1) 32-33
................. ( 1) 32-33
Wagoneer ................. 36-37 ....................... 36-37
(1) - Angle stops are not adjustable. Parts must be replaced if
angle is incorrect.
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TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Application Ft. Lbs.(N.m)\
Ball Joint Type
Lower Ball Joint Nut
Jeep .................................................. 100 (136)\
Upper Ball Joint Nut
Jeep .................................................. 100 (136)\
Upper Ball Joint Split Retaining Seat
Jeep ..................................................... 50 (68)\
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Page 1068 of 1378
1) Place front wheels in straight-ahead position. Remove lock
nuts and washers from damper ends. Remove damper assembly and rubber
bushings.
2) To install, place rubber bushings in damper eyelets. On
Grand Wagoneer models, secure eyelet at push rod end to stud on tie
rod bracket. Install rubber bushings in damper body eyelet. On
Cherokee, Comanche, Wagoneer and Wrangler, install stud at push rod
end into hole on tie rod.
3) On all models, attach opposite end of damper with bolt and
lock nut (Cherokee, Comanche, Wagoneer and Wrangler) or with a lock
nut (Grand Wagoneer). Tighten lock nuts.
Fig. 2: Grand Wagoneer Steering Linkage
WHEEL ALIGNMENT
Page 1069 of 1378
After performing appropriate service procedures, refer to
WHEEL ALIGNMENT SPECIFICATIONS & PROCEDURES article in the WHEEL
ALIGNMENT section.
CONNECTING ROD REPLACEMENT
Removal & Installation
Remove cotter pins and nuts from both ends of connecting rod.
Using a separator, remove connecting rod. To install, place wheels in
straight-ahead position. Center pitman arm. Install connecting rod.
Tighten lock nuts. Install new cotter pins.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Application Ft.Lbs. (N.m)
Clamp Bolt
Grand Wagoneer ................................. 30 (41)
All Others ..................................... 14 (19)
Connecting Rod Nut
5/8" ........................................... 70 (95)
9/16" .......................................... 60 (82)
Pitman Arm-to-Shaft Nut ........................ 185 (251)
Steering Damper Lock Nut
Wrangler ....................................... 53 (71)
All Others ..................................... 30 (41)
Tie Rod End Stud Nuts
Grand Wagoneer ................................. 60 (82)
All Others ..................................... 35 (47)
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Page 1075 of 1378
Attaching hardware
incorrect .............. A .......... Require replacement of
incorrect part.
Attaching hardware
loose .................. A ... Require repair or replacement
of loose part.
Attaching hardware
missing ................ C .. Require replacement of missing
part.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
Blocked ................. A .. Require repair or replacement.
Connector bent .......... A .. Require repair or replacement.
Connector broken ........ A ............ Require replacement.
Connector loose ......... A .. Require repair or replacement.
Inoperative ............. A .. Require repair or replacement.
Leaking ................. A .. Require repair or replacement.
Restricted .............. A .. Require repair or replacement.
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AIR RIDE SUSPENSION - AIR SPRINGS
AIR RIDE SUSPENSION - AIR SPRING INSPECTION \
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Condition Code Procedure
Attaching hardware
broken ................. A ... Require replacement of broken
part.
Attaching hardware
incorrect .............. A .......... Require replacement of
incorrect part.
Attaching hardware
loose .................. A ... Require repair or replacement
of loose part.
Attaching hardware
missing ................ C .. Require replacement of missing
part
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of part with damaged threads.
Attaching hardware
threads stripped
(threads missing) ...... A ..... Require replacement of part
with stripped threads.
Collar cracked .......... A ............ Require replacement.
End cap cracked ......... A ............ Require replacement.
Inner fabric of bag
damaged ................ A ............ Require replacement.
Leaking ................. A .. Require repair or replacement.
Outer covering of air bag
is cracked to the extent
that inner fabric of air
bag is visible ......... 1 ............ Suggest replacement.
Piston cracked .......... A ............ Require replacement.
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