GROUP-l 7
REAR
SUSPENSION
CONTENTS
SPECIFICATIONS . . . . . . . . . . .. . . . . . . . . . . .. .. . . . . . . .. .. . . .. . . .. .. . 2 TROUBLESHOOTING ........................................ 3
GENERAL SPECIFICATIONS ........................ 2 COMPONENT SERVICE ..................................... 3
TORQUE SPECIFICATIONS .......................... 2 REAR SUSPENSION .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
17-1
SPECIFICATIONS
GENERAL SPECIFICATIONS
Suspension system Asymmetrical semielliptic leaf springs
Leaf springs (Standard)
I
Number of leaf springs 4
Straight span mm (in.) 1,200 (47.2)
Camber (unladen) mm (in.) /! 78 (3.1)
Spring constant N/mm (lbs./in.,
’
- as installed
at load of l,OOO-2,500 N (220-551 lbs.) 24 (134)
at load of 4,670~8,870 N (1,030-1,955 lbs.) 56 (3 14)
Leaf springs (Heavy duty)
Number of leaf springs 4
Straight span mm (in.) 1,200 (47.2)
>
Camber (unladen) mm (in.) 78 (3.1)
I
Sijring constant N/mm (lbs./id.)‘
- .
- as installed
at load of 700-2,700 N (154-595 lbs.) 35 (196)
at load of 5,000-15,000 N (1,102-3,307 lbs.) 124 (694)
Shock absorbers
Type Hydraulic cylinder, double-acting type
Max. length mm (in.) 548 (21.6)
Min. length mm (in.) 328 (12.9)
Stroke mm (in.) 220 (8.7)
Damping force
[at 0.3 m/set. (0.984 ft./set.)]
Expansion N (lbs.) 1,840 (406)
Compression N (lbs.) 720 (159)
TORQUE SPECIFICATIONS Nm (ft.lbs.)
Shackle assembly mounting nuts 45-60 (33-43)
Front pin assembly mounting nuts 45-60 (33-43)
Shock absorber mounting nuts 18-25 (13-18)
Front pm assembly mounting bolts 14-20 (10-14)
U-bolt mounting nuts 85-110 (61-80) .
17-2
TROUBLESHOOTING/
COMPONENT SERVICE-REAR SUSPENSION
Symptom Probable cause Remedy
Abnormal sound Suspension securing bolt(s) loose Tighten to specified torque
Loose wheel nuts
Faulty shock absorber Replace damaged parts
Worn bushings
Damaged or worn wheel bearings
Components bent or distorted
Broken spring
Wheel or tire imbalance Balance
Improper tire inflation Inflate to specification
Defective tire Replace
Poor riding comfort Over-inflated tire Adjust inflation pressures
(Refer to GROUP 22.)
Malfunctioning shock absorber Replace
Deteriorated or broken spring
Vehicle tilts Uneven camber Replace
Deteriorated or worn bushing
Deteriorated or broken spring
REAR SUSPENSION
COMPONENTS
1. Spring assembly 6. Rubber bushing.
2. U-bolt 7. Shackle
3. Bumpstopper 8. Rubber bushing
4. Shock absorber 9. Front pin
5. Shackle plate 10. U-bolt seat
Nm ft.lbs.
AC 45-60 33-43
B* 18-25 13-18
C 14-20 10-14
D 85-l 10 61-80
*To be tightened with vehicle
lowered to the ground. 12W503
REMOVAL
1. Support the vehicle with floor stands positioned on the
frame.
2. Remove the wheel.
3. Jack up the rear axle housing so that it is not supported
by the spring assembly.
4. Remove the parking brake cable clamp.
(Refer to GROUP 5.)
5. Detach the shock absorber from the U-bolt seat.
(12W511)
6. Remove the U-bolts, the U-bolt seat, and the bump
stopper. (12W5 11)
COMPONENT SERVICE-REAR SUSPENSION
7. Remove the front pm and lower the front end of the
spring assembly.
8. Remove the shackle to separate the spring assembly from
the side frame.
9. Remove the shock absorber from the side frame.
(12W507)
10. Remove the rubber bushings.
INSPECTION
1. Check shock absorber for damage, fluid leaks and noise.
2. Check leaf spring for deterioration and damage.
3. Check U-bolt for bend.
4. Check rubber bushings for wear and damage.
17-4
COMPONENT SERVICE-REAR SUSPENSION
Checking of the Spring Assembly
1. Check the center bolt for looseness. ( 12S599)
2. Check to be sure that each spring leaf is correctly in
contact with the one above it. (Also check to be sure that
the spring leaves are in positive contact with each other at Looseness
both ends.) (128599)
3. If loose contact is evident, replace the spring as an
assembly.
NOTE
If the spring leaves move, or if there is a clearance between
one spring leaf and another, the spring leaves will not absorb
shock properly, and could break. 12s599
INSTALLATION
1. Install the spring assembly on the vehicle. Make sure the
front end (front pin side) to center bolt distance is
shorter than the rear end to center bolt distance. Vehicle front
F1 Q
Center bolt
I 532586
2. Install the front pin from the outside, toward the inside
of vehicle. (12W5 15) Front pin side Shackle side
3. Install the shackle from the outside, toward the inside of
Inside of 0 lnsideof 0
vehicle. ( 12W5 14) vehicle vehicle
12W515 12W514
4. Tighten the U-bolt nuts evenly so that the ends of each
bolt protrude an equal amount. (12W5 12)
5. Loosely install the shock absorber.
6. Tighten components with the vehicle on the ground
to eliminate torsion on the bushings.
