ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996

Steering Linkage

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See Figure 1



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Fig. Fig. 1: Steering linkage assembly-Trooper

REMOVAL & INSTALLATION



Pitman Arm

See Figures 2, 3 and 4



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Fig. Fig. 2: Remove the Pitman arm to steering linkage cotter pin



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Fig. Fig. 3: Remove the retainer nut



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Fig. Fig. 4: Use a suitable tie rod puller to loosen the Pitman arm-to-steering linkage connection

  1. Raise and support the front of the vehicle safely on jackstands.
  2.  
  3. If necessary, remove the air snorkel for access to the intermediate shaft.
  4.  
  5. Matchmark the upper and lower intermediate shaft joints, then remove the retainers and remove the intermediate shaft.
  6.  
  7. Disconnect the oil cooler pipes at the crossmember, if equipped.
  8.  
  9. If equipped, remove the splash shield.
  10.  
  11. Remove the nut from the ball stud at the relay rod-to-Pitman arm connection.
  12.  
  13. Using a suitable universal steering linkage puller, such as J-24319-01 or equivalent, separate the relay rod from the Pitman arm. Pull down on the relay rod and separate the stud.
  14.  
  15. For vehicles where access to the Pitman arm/nut is restricted, remove the 2 lower steering gear bolts (leaving on the top bolt which should be loosened), then pivot the steering gear for Pitman arm clearance. Support the gear using a block of wood.
  16.  

On 1994 vehicles, it may not be possible to pivot the gear for access to the Pitman shaft. If necessary, unbolt and remove the gear from the vehicle. For details, please refer to the gear procedures found later in this section.

  1. Remove the Pitman arm-to-Pitman shaft nut, then matchmark the relationship of the arm to the shaft to assure proper alignment during assembly.
  2.  
  3. Using a Pitman arm remover such as J-6632 or equivalent, separate the Pitman arm from the Pitman shaft and remove it from the vehicle.
  4.  

When separating the Pitman arm from the shaft, DO NOT use a hammer or apply heat to the arm.

To install:

If the Pitman arm is being replaced, transfer the alignment mark to the new component.

  1. Install the Pitman arm while aligning the arm-to-Pitman shaft matchmark. Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable) to properly seat the arm on the shaft, and tighten to 40 ft. lbs. (54 Nm) to seat the taper.
  2.  
  3. Remove the installer tool, then install the Pitman shaft nut and tighten to 185 ft. lbs. (250 Nm).
  4.  
  5. Install the lower retaining bolts. Tighten all of the retaining bolts to 55 ft. lbs. (75 Nm).
  6.  
  7. Connect the Pitman arm to the relay rod (make sure that the seal is on the stud). Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent, and tighten to 40 ft. lbs. (54 Nm) to seat the taper.
  8.  
  9. After seating, remove the tool, install lockwashers and nuts, then tighten to 60 ft. lbs. (82 Nm).
  10.  

If a prevailing torque nut was used, (no spring washer), then a new nut must be used.

  1. Install the splash shield, oil cooler pipes, intermediate shaft and air duct, as applicable.
  2.  
  3. Remove the jackstands and carefully lower the vehicle.
  4.  
  5. Check and adjust toe, as necessary.
  6.  

Idler Arm
  1. Raise and support the vehicle with jackstands. Place the jackstands under the frame so the wheels are free to turn.
  2.  

Jerking the right wheel assembly back and forth is not an acceptable testing procedure; there is no control on the amount of force being applied to the idler arm. Before suspecting idler arm shimmying complaints, check the wheels for imbalance, run-out, force variation and/or road surface irregularities.

  1. To inspect for a defective idler arm:
    1. Position the wheels in the straight ahead position.
    2.  
    3. Position a spring scale near the relay rod end of the idler arm, then exert 25 ft. lbs. (110 Nm) of force upward and then downward. Measure the distance between the upward and downward directions that the idler arm moves. The allowable deflection is 1 / 8 in. (3.18mm) for each direction for a total difference of 1 / 4 in. (6.35mm); if the idler arm deflection is beyond the allowable limits, replace it.
    4.  

  2.  
  3. Remove the idler arm-to-frame bolts/nuts.
  4.  
  5. Remove the nut from the idler arm-to-relay rod ball joint.
  6.  
  7. Use a suitable steering linkage puller such as J-24319-01 or equivalent to separate the relay rod from the idler arm.
  8.  
  9. Remove the idler arm assembly from the vehicle.
  10.  

To install:
  1. Install the idler arm, then tighten the arm assembly-to-frame bolts to 60 ft. lbs. (82 Nm).
  2.  
  3. Connect the relay rod to the idler arm. Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable) to seat the relay rod-to-idler arm ball joint stud. Tighten the tool to 40 ft. lbs. (54 Nm), then remove the tool.
  4.  
  5. Install the idler arm-to-relay rod stud nut and tighten to 35 ft. lbs. (47 Nm) for 2WD vehicles or 60 ft. lbs. (81 Nm) for 4WD vehicles.
  6.  
  7. Remove the jackstands and carefully lower the vehicle.
  8.  
  9. Check and/or adjust the toe, as necessary.
  10.  

Intermediate Rod
EXCEPT HOMBRE
  1. Raise and safely support the vehicle on jackstands.
  2.  
  3. Remove the cotter pin from the ball studs connecting the tie rods-to-intermediate rod and the steering damper. Remove the castellated nuts. Using a ball joint separator tool or equivalent, separate the components.
  4.  
  5. Remove the nut and lockwasher on the ball stud connecting the intermediate rod to the idler arm. Using a ball joint separator tool or equivalent, separate the intermediate rod from the idler arm.
  6.  
  7. Remove the intermediate rod with the tie rods attached.
  8.  
  9. If the tie rod is in need of replacement, paint alignment marks on the rod, then disconnect the intermediate rod from the tie rod.
  10.  

To install:
  1. If removed, install the tie rod to the intermediate rod.
  2.  
  3. Make sure the threads on all the components are clean and smooth.
  4.  
  5. Install the intermediate rod-to the idler arm and secure with the nut. Tighten the nut to 50 ft. lbs. (65 Nm).
  6.  
  7. Install the rod on to the Pitman arm. Tighten the nut to 44 ft. lbs. (57 Nm). Tighten the nut just enough to insert a new cotter pin.
  8.  
  9. Install the intermediate rod to steering damper end. Tighten the nut to 87 ft. lbs. (113 Nm), then advance the nut just enough to insert a new cotter pin.
  10.  
  11. Install the tie rods and tighten the nut to 44 ft. lbs. (57 Nm), then advance the nut just enough to insert a new cotter pin.
  12.  
  13. Install the wheels and lower the vehicle.
  14.  

Relay Rod (Centerlink)
HOMBRE

See Figure 5



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Fig. Fig. 5: Hombre relay rod assembly

  1. Raise and support the vehicle safely using jackstands.
  2.  
  3. Remove the inner tie rod stud nuts, then separate the tie rods from the relay rod using a suitable tie rod removal tool. Refer to the tie rod procedure in this section for tie rod removal steps.
  4.  
  5. On vehicles equipped with a steering damper, remove the shock absorber ball stud nut, then separate the shock absorber from the relay rod using a suitable linkage puller, such as J-24319-01 or equivalent.
  6.  
  7. Remove the ball stud nut from the Pitman arm-to-relay rod connection, then use a suitable steering linkage puller, such as J-24319-01 or equivalent, to disconnect the Pitman rod from the idler arm.
  8.  
  9. Remove the ball stud nut from the idler arm-to-relay rod connection, then use a suitable steering linkage puller, such as J-24319-01 or equivalent, to disconnect the relay rod from the idler arm.
  10.  
  11. Once the linkage components have been removed from the relay rod, it is free to be removed from the vehicle.
  12.  

To install:
  1. Clean and inspect the threads on the tie rod, the tie rod ends and the ball joints for damage, and replace them (if necessary). Inspect the ball joint seals for excessive wear, and replace them (if necessary).
  2.  
  3. Connect the relay rod to the idler arm. Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable) to seat the relay rod-to-idler arm ball joint stud. Tighten the tool to 40 ft. lbs. (54 Nm), then remove the tool.
  4.  
  5. Install the idler arm-to-relay rod stud nut and tighten it to 35 ft. lbs. (2WD) or 60 ft. lbs. (4WD).
  6.  
  7. Connect the Pitman arm to the relay rod (make sure that the seal is on the stud). Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable), install the correct one onto the ball stud and tighten it to 40 ft. lbs. (54 Nm) to seat the taper.
  8.  
  9. After seating, remove the tool, install the lockwasher and nut and tighten to 60 ft. lbs. (82 Nm). If a prevailing torque nut was used (no spring washer, as with 1994 vehicles) a NEW nut MUST be installed.
  10.  
  11. Install the inner tie rods to the relay rod, then install the mounting nuts and tighten to specification. For details, please refer to the tie rod procedure located later in this section.
  12.  
  13. Remove the jackstands and carefully lower the vehicle, then check the steering linkage for proper operation.
  14.  

Outer Tie Rod

See Figures 6, 7, 8, 9, 10, 11 and 12



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Fig. Fig. 6: Tie rod assembly and steering linkage components-Pick-up



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Fig. Fig. 7: Tie rod assembly-Hombre



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Fig. Fig. 8: Remove the cotter pin from the stud ball



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Fig. Fig. 9: Loosen and remove the tie rod retainer nut



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Fig. Fig. 10: Use a suitable tie rod puller to loosen the tie rod from the steering knuckle



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Fig. Fig. 11: Remove the tie rod from the knuckle



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Fig. Fig. 12: Unscrew the tie rod end. Count the number of turns for installation

DO NOT attempt to separate the tie rod-to-steering knuckle joint by driving a wedge type tool between the joint and knuckle or seal damage could result.

  1. Raise the vehicle and support safely on jackstands. Remove the front wheel assemblies.
  2.  
  3. Remove the cotter pin and castle nut from the tie rod end. Using a tie rod removal tool, separate the tie rod from the steering knuckle.
  4.  

Tie rod adjustment components tend to rust in service. If the torque required to remove the nut from the bolt exceeds 62 inch lbs. (9 Nm), the nuts should be replaced. Also, the components should be lubricated with a penetrating oil, then the clamps should be rotated until the move freely. Pay attention to the clamp positioning before loosening or removing them.

  1. Remove the tie rod end as follows:
    1. Measure the installed length of the tie rod end(s) for installation purposes.
    2.  
    3. Loosen the adjuster tube clamp bolt(s).
    4.  
    5. Unscrew the tie rod end from the adjuster tube; count the number of turns necessary to remove the tie rod end. This can be used to help preserve the toe adjustment during installation.
    6.  

  2.  

To install:
  1. If one or both of the tie rod ends were removed:
    1. Clean, inspect and lubricate the adjuster tube threads.
    2.  
    3. Thread the tie rod end into the adjuster tube using the same number of turns necessary to remove it. Once installed, measure the length of the tie rod end, as done during removal to help assure toe adjustment.
    4.  
    5. Position the clamp bolts between the adjuster tube dimples (located at each end) and in the proper location. Tighten the adjuster tube clamp bolt 14 ft. lbs. (19 Nm). Tighten the locknut to 25 ft. lbs. (34 Nm).
    6.  

  2.  
  3. Position the tie rod ends to the steering knuckle and/or the relay rod. Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable), install the correct one onto the ball stud and tighten it to 40 ft. lbs. (54 Nm) to seat the taper(s).
  4.  
  5. Once the ends are properly seated, remove the tool and install the retaining nut(s).
  6.  
  7. Tighten the inner and/or outer tie rod end retaining nuts to 35 ft. lbs. (47 Nm).
  8.  
  9. Install a new cotter pin to the castle nut(s), as applicable.
  10.  
  11. Check and adjust the toe, as necessary.
  12.  
  13. Remove the jackstands and carefully lower the vehicle, then check the steering linkage for proper operation.
  14.  
  15. Have the front end aligned by a qualified technician.
  16.  

Damper Assembly

The damper assembly is used to remove steering wheel vibration and vehicle wander. Although not all vehicles are equipped with a damper, many 4WD vehicles are.

  1. Raise and support the front frame of the vehicle safely on jackstands.
  2.  
  3. Remove the damper assembly-to-relay rod cotter pin and nut.
  4.  
  5. Use a suitable universal steering linkage puller to separate the damper assembly from the relay rod.
  6.  
  7. Remove the cotter pin (if equipped) and the damper assembly-to-frame bracket nut/bolt, then remove the damper assembly from the vehicle.
  8.  

To install:
  1. Install the damper assembly to the frame bracket, then secure using the retainers. Tighten the bolt/nut to 26 ft. lbs. (35 Nm). If equipped, install a new cotter pin.
  2.  
  3. Position the damper assembly to the relay rod. Use a steering linkage installer such as J-29193 (12mm), J-29194 (14mm) or equivalent (as applicable), and tighten to 40 ft. lbs. (54 Nm) to seat the taper.
  4.  
  5. Remove the installation tool, then install the retaining nut and tighten to 45 ft. lbs. (62 Nm). Install a new cotter pin.
  6.  
  7. Remove the jackstands and carefully lower the vehicle.
  8.  
  9. Have the alignment checked by a qualified technician.
  10.  

 
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