engine JEEP CHEROKEE 1988 Service Repair Manual
[x] Cancel search | Manufacturer: JEEP, Model Year: 1988, Model line: CHEROKEE, Model: JEEP CHEROKEE 1988Pages: 1378, PDF Size: 19.9 MB
Page 1050 of 1378
shaft from side to side through specified arc on each side of center.
See OVER-CENTER PRELOAD chart. Note torque reading going over center.
Adjust thrust bearing preload before over-center preload. See Fig. 3.
OVER-CENTER PRELOAD SPECIFICATIONS - INCH LBS. (N.m)
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Application Arc Over-Center (1) Total
New Gears .......... 45
........ 4-8 (.4-.9) ......... 14 (1.5)
Used Gears ( 2) ..... 45 ........ 4-5 (.5-.6) ......... 14 (1.5)
( 1) - Total preload is sum of thrust bearing and over-center preload.
( 2) - In service for more than 400 miles (640 km.).
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Fig. 3: Adjusting Over-Center Preload
REMOVAL & INSTALLATION
POWER STEERING PUMP
Removal & Installation
1) Loosen and remove pump drive belt. Disconnect pressure and
return hoses from pump. Cap ends to prevent loss of fluid or
contamination.
2) Remove bracket-to-engine bolts. Remove pump and mounting
bracket as an assembly. To install, reverse removal procedure. Fill
and bleed system.
Page 1054 of 1378
plate and end plate with petroleum jelly. Install new drive shaft seal
in housing. Install "O" ring in third groove of housing. Install dowel
pins in thrust plate. Install drive shaft through thrust plate and
rotor. Install NEW retaining ring. Ensure rotor slides freely on drive
shaft splines.
2) Install drive shaft in pump housing. Ensure thrust plate
engages with dowel pins. Install pump ring on dowel pins with rotation
arrow facing upward. Install vanes with rounded edges toward pump
ring.
3) Lubricate outer chamfered edge of pressure plate with
petroleum jelly. Install pressure plate with spring groove facing
upward. To seat pressure plate, place large socket on pressure plate
and press downward approximately 1/16".
4) Install end plate "O" ring in second groove of housing.
Install pressure plate spring and end plate in housing. Press end
plate downward, and install retaining ring. Install "O" ring, flow
control valve and spring.
5) Install mounting stud and pressure line union "O" rings in
rear of pump housing. Lubricate inner edge of reservoir with petroleum
jelly, and install. Install mounting stud. Tighten stud to
specification. Install pressure line union, and tighten to
specification. See appropriate table under TORQUE SPECIFICATIONS.
6) Using Pump Pulley Installer (J-25033-B), install pulley o\
n
pump shaft. Ensure shaft protrudes distance measured in disassembly
procedure.
7) When replacing plastic pulley with metal pulley, install
pulley flush with end of shaft. Install pump on engine, and compare
alignment with adjacent pulleys. If necessary, correct alignment by
using pump pulley installer to adjust shaft protrusion.
NON-SUBMERGED VANE POWER STEERING PUMP
Disassembly
1) Remove return tube. Clean exterior of unit. Measure
distance shaft protrudes through pulley, and record for reassembly
reference. Using pulley remover, remove pulley from shaft. Remove
fitting, "O" ring, flow control valve and spring. See Fig. 7.
2) Remove snap ring, drive shaft and bearing. Note direction
of snap ring installation for reassembly reference. Support drive
shaft bearing on inner race, and press drive shaft from bearing. Using
screwdriver, remove drive shaft seal from housing.
3) Insert punch into access hole to disengage and remove
retaining ring. Using a brass drift, tap on thrust plate, and remove.
Remove "O" ring, pump ring, rotor and vanes. Remove dowel pins,
pressure plate, "O" ring and pressure plate spring. Remove "O" ring,
dowel pin and sleeve.
Fig. 7: Exploded View of Cherokee & Comanche Pump Assembly
Courtesy of Chrysler Motors
Page 1071 of 1378
TIE ROD ENDS (INNER AND OUTER)
TRACK BARS
TRAILING ARMS
WHEEL BEARINGS, RACES AND SEALS
Wheel Alignment
WHEEL ALIGNMENT
Wheels and Tires
TIRES
VALVE STEMS
WHEEL ATTACHMENT HARDWARE
WHEELS (RIMS)
MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
1) a Pledge of Assurance to their Customers and 2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards
are continually re-published. In addition to these, standards for
Drive Train and Transmissions have recently been promulgated.
Participating shops utilize these Uniform Inspection & Communication
Standards as part of the inspection process and for communicating
their findings to their customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers mediation and arbitration through MAP/BBB-CARE and other non-
Page 1072 of 1378
profit organizations. MAP conducted pilot programs in twelve states
before announcing the program nationally in October, 1998. During the
pilots, participating repair shops demonstrated their adherence to the
Pledge and Standards and agreed to follow the UICS in communicating
the results of their inspection to their customers. To put some
"teeth" in the program, an accreditation requirement for shops was
initiated. The requirements are stringent, and a self-policing method
has been incorporated which includes the "mystery shopping" of
outlets.
We welcome you to join us as we continue our outreach... with
your support, both the automotive repair industry and your customers
will reap the benefits. Please visit MAP at our Internet site www.
motorist.org or contact us at:
1444 I Street, NW Suite 700
Washington, DC 20005
Phone (202) 712-9042 Fax (202) 216-9646
January 1999
MAP UNIFORM INSPECTION GENERAL GUIDELINES
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, steering,
suspension, wheel alignment, drive-line, engine performance and
maintenance, and heating, ventilation and air conditioning, and
electrical services be offered and performed under the standards and
procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be "Required" or
"Suggested". In addition, suggestions may be made to satisfy the
requests expressed by the customer.
When a component is suggested or required to be repaired or
replaced, the decision to repair or replace must be made in the
customer's best interest, and at his or her choice given the options
available.
This section lists the various parts and conditions that
indicate a required or suggested service or part replacement.
Although this list is extensive, it is not fully inclusive. In
addition to this list, a technician may make a suggestion. However,
any suggestions must be based on substantial and informed experience,
or the vehicle manufacturer's recommended service interval and must be
documented.
Some conditions indicate that service or part replacement is
required because the part in question is no longer providing the
function for which it is intended, does not meet a vehicle
manufacturer's design specification or is missing.
Example:
An exhaust pipe has corroded severely and has a hole in it
through which exhaust gases are leaking. Replacement of the
exhaust pipe in this case is required due to functional
failure.
Example:
A brake rotor has been worn to the point where it measures
less than the vehicle manufacturer's discard specifications.
Replacement of the rotor is required because it does not meet
design specifications.
Page 1127 of 1378
COIL SPRING
Removal
1) Raise and support vehicle. Remove wheel assembly. Place
reference mark on drive shaft and front axle flange. Disconnect drive
shaft at front axle. Place jack stand under axle housing. Disconnect
lower control arms at axle housing.
2) Disconnect stabilizer bar links and lower shock absorber
mounting bolts at axle housing. Disconnect track bar at the sill
bracket (if equipped). Disconnect center link at pitman arm.
3) Lower axle housing to relieve spring pressure. Remove
spring retainer mounting bolt, then remove retainer and coil spring.
Note component locations for reassembly reference.
NOTE: Coil springs are rated separately for each side of vehicle
depending on optional equipment and type of service. Ensure
springs are marked for installation in original positions.
Installation
1) Install coil spring and spring retainer. Tighten retainer
mounting bolt. Raise axle housing into position. Connect lower
control arms to axle housing.
2) Install lower shock absorber mounting bolts, center
link-to-pitman arm, track bar-to-frame bracket and stabilizer bar
links-to-axle housing. To complete installation, reverse removal
procedure.
LEAF SPRING
Removal & Installation
Raise and support vehicle. Raise axle assembly with jack to
relieve spring tension. On Wrangler models, loosen stabilizer bar
link nut. On all other models, remove stabilizer bar. Remove spring
"U" bolts and plate. Disconnect front and rear shackles from frame.
Lower spring assembly. To install, reverse removal procedure.
UPPER CONTROL ARM &
AXLE HOUSING PIVOT BUSHING
Removal
1) To remove right side upper control arm for 6-cylinder
models, disconnect right side engine mount. Raise and support engine
so rear control arm mounting bolt clears exhaust pipe. On all models,
raise and support vehicle.
2) Remove upper control arm mounting bolt from axle housing.
Disconnect control arm mounting bolt at frame rail. Remove upper
control arm. Repeat procedure for opposite control arm. Inspect
control arm for damage or distortion and replace as needed.
3) Check pivot bushings for excessive distortion,
deterioration or wear. If bushing replacement is necessary, install
Spacer (J-33581-3) between ears of control arm bracket on axle
housing. See Fig. 4.
NOTE: Spacer is not used on axle housings with solid control arm
brackets.
CAUTION: Do not attempt to remove upper control arm pivot bushing
without spacer. Tool is designed to support bracket and
prevent distortion during bushing removal.
4) Install Upper Control Arm Pivot Bushing Remover/Installer
Set (J-35581, which must include Spacer J-35581-3, Remover/Installer
Page 1132 of 1378
TIE ROD ENDS (INNER AND OUTER)
TRACK BARS
TRAILING ARMS
WHEEL BEARINGS, RACES AND SEALS
Wheel Alignment
WHEEL ALIGNMENT
Wheels and Tires
TIRES
VALVE STEMS
WHEEL ATTACHMENT HARDWARE
WHEELS (RIMS)
MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
1) a Pledge of Assurance to their Customers and 2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards
are continually re-published. In addition to these, standards for
Drive Train and Transmissions have recently been promulgated.
Participating shops utilize these Uniform Inspection & Communication
Standards as part of the inspection process and for communicating
their findings to their customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers mediation and arbitration through MAP/BBB-CARE and other non-
Page 1133 of 1378
profit organizations. MAP conducted pilot programs in twelve states
before announcing the program nationally in October, 1998. During the
pilots, participating repair shops demonstrated their adherence to the
Pledge and Standards and agreed to follow the UICS in communicating
the results of their inspection to their customers. To put some
"teeth" in the program, an accreditation requirement for shops was
initiated. The requirements are stringent, and a self-policing method
has been incorporated which includes the "mystery shopping" of
outlets.
We welcome you to join us as we continue our outreach... with
your support, both the automotive repair industry and your customers
will reap the benefits. Please visit MAP at our Internet site www.
motorist.org or contact us at:
1444 I Street, NW Suite 700
Washington, DC 20005
Phone (202) 712-9042 Fax (202) 216-9646
January 1999
MAP UNIFORM INSPECTION GENERAL GUIDELINES
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, steering,
suspension, wheel alignment, drive-line, engine performance and
maintenance, and heating, ventilation and air conditioning, and
electrical services be offered and performed under the standards and
procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be "Required" or
"Suggested". In addition, suggestions may be made to satisfy the
requests expressed by the customer.
When a component is suggested or required to be repaired or
replaced, the decision to repair or replace must be made in the
customer's best interest, and at his or her choice given the options
available.
This section lists the various parts and conditions that
indicate a required or suggested service or part replacement.
Although this list is extensive, it is not fully inclusive. In
addition to this list, a technician may make a suggestion. However,
any suggestions must be based on substantial and informed experience,
or the vehicle manufacturer's recommended service interval and must be
documented.
Some conditions indicate that service or part replacement is
required because the part in question is no longer providing the
function for which it is intended, does not meet a vehicle
manufacturer's design specification or is missing.
Example:
An exhaust pipe has corroded severely and has a hole in it
through which exhaust gases are leaking. Replacement of the
exhaust pipe in this case is required due to functional
failure.
Example:
A brake rotor has been worn to the point where it measures
less than the vehicle manufacturer's discard specifications.
Replacement of the rotor is required because it does not meet
design specifications.
Page 1187 of 1378
Fig. 6: Engine Driveability & Automatic Transmission
Page 1205 of 1378
![JEEP CHEROKEE 1988 Service Repair Manual TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Applicatio](/img/16/57037/w960_57037-1204.png "JEEP CHEROKEE 1988 Service Repair Manual TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Applicatio")
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Application Ft. Lbs. (N.m)
Companion Flange Nut
Chrysler Corp. ....................... 130-200 (176-271)
General Motors ................................ 80 (108)
Jeep ......................................... 110 (149)
Detent Plug
General Motors ................................. 11 (15)
Chrysler Corp. & Jeep .......................... 15 (20)
Drain & Fill Plug .......................... 30-40 (41-54)
Extension Housing Bolt ..................... 20-25 (27-34)
Front Bearing Retainer Bolt
Chrysler Corp. & Jeep .......................... 16 (22)
General Motors ................................. 14 (19)
Front Case-to-Rear Case Bolt
Chrysler Corp.
Flange Head Bolt ........................ 35-45 (47-61)
All Other Bolts ........................ 20-25 (27-34)
General Motors ................................. 23 (31)
Jeep ..................................... 20-25 (27-34)
Range Lever Nut ............................ 15-20 (20-27)
Rear Bearing Retainer Bolt ................. 20-25 (27-34)
Rear Crossmember ................................. 30 (41)
Shift Lever Lock Bolt ............................ 10 (14)
Speed Sensor Bolt ................................ 23 (31)
Transfer Case-to-Transmission Nut ................ 26 (35)
Vacuum Switch
Chrysler Corp. ........................... 15-25 (20-34)
General Motors ................................. 17 (23)
Jeep ..................................... 20-25 (27-34)
INCH Lbs.
Control Cable Lock Nut ............................ 18 (2)
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VACUUM DIAGRAMS
For vacuum diagrams, refer to appropriate VACUUM DIAGRAMS
article in the ENGINE PERFORMANCE section.
Page 1212 of 1378
\003
TR AN SM IS SIO N R EM OVA L & IN STA LLA TIO N - A /T
1988 J e ep C hero ke e
1988 Automatic Transmission Removal
JEEP
TRANSMISSION
ALL MODELS
Removal
1) Disconnect fan shroud and transmission fill tube upper
bracket. Raise vehicle. Remove converter inspection cover and fill
tube. Remove starter.
2) Mark drive shafts for reassembly. Disconnect shafts at
transfer case and wire to frame rails. DO NOT allow shafts to hang
free as damage to universal joints may result. On V8 models,
disconnect exhaust pipes from exhaust manifolds. Drain transfer case
lubricant. Disconnect speedometer cable from transmission.
3) Disconnect all shift and throttle linkages and wiring
from transmission and transfer case. Mark converter drive plate and
converter for reassembly and remove torque converter-to-drive plate
bolts. Rotate crankshaft to gain access to bolts.
4) Support transmission/transfer case assembly with jack and
secure with chain. Remove bolts and rear transmission crossmember.
Lower transmission enough to disconnect cooler lines at transmission.
Remove transmission-to-engine retaining bolts and slowly slide
transmission assembly away from engine.
5) Hold converter in position while lowering transmission
assembly from vehicle. Separate transmission from transfer case.
Installation
To install, reverse removal procedures. DO NOT tighten
exhaust pipe attaching bolts until crossmember has been installed and
transmission jack has been removed. Make sure all index marks made at
removal are aligned. Tighten all bolts to specification and fill
transmission and transfer case with fluid.
TORQUE SPECIFICATIONS
TIGHTENING SPECIFICATIONS \
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Application Ft. Lbs. (N.m)\
Cooler Line Nuts ........................................... 25 (34)\
Torque Converter-to-Drive Plate Bolts ...................... 22 (30)\
Transfer Case-to-Transmission Bolts ........................ 40 (54)\
Transmission-to-Engine Bolts ............................... 30 (41)\
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