Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Power Steering Gear

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REMOVAL & INSTALLATION



1982-86 Vehicles

See Figure 1



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Fig. Fig. 1: Power steering gear and related components-1982-86 vehicles

  1. Raise and support the car on jackstands.
  2.  
  3. Disconnect the hose clamp and hose at the steering gear. Disconnect the flare nut and the tube at the steering gear, then drain the fluid from the gear.
  4.  
  5. Using the Ball Joint Remover tool HT72520000, remove the tie rod from the knuckle.
  6.  
  7. Place a floor jack under the transaxle and support it.
  8.  
  9. Remove the exhaust tube and the rear engine mount.
  10.  
  11. Remove the steering column lower joint.
  12.  
  13. Unbolt and remove the steering gear unit and the linkage.
  14.  

To install:
  1. Install the power steering gear assembly to the vehicle. Torque the tie rod-to-steering knuckle nut to 26-36 ft. lbs. (35-49 Nm), the steering gear-to-frame clamp bolts to 43-58 ft. lbs. (58-79 Nm), the lower joint-to-pinion gear bolt to 22-29 ft. lbs. (29-39 Nm), the lower joint-to-steering column bolt to 22-29 ft. lbs. (29-39 Nm), the low pressure hose clip bolt to 9-17 inch lbs. (1.02-1.92 Nm) and the high pressure hose-to-gear to 11-18 ft. lbs. (15-25 Nm).
  2.  
  3. Bleed the power steering system and check the wheel alignment.
  4.  

When installing the lower steering joint to the steering gear, make sure that the wheels are aligned with the vehicle and the steering joint slot is aligned with the steering gear cap or spacer mark.

1987-96 Vehicles

See Figures 2 and 3



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Fig. Fig. 2: Power steering gear assembly-1987-96 vehicles



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Fig. Fig. 3: Exploded view of a typical power steering gear assembly-model PR24SA shown

  1. Raise and support the vehicle safely, then remove the wheels.
  2.  
  3. Disconnect the power steering hose from the power steering gear and plug all hoses to prevent leakage.
  4.  
  5. Disconnect the side rod studs from the steering knuckles.
  6.  
  7. Support the transaxle with a suitable transmission jack and remove the exhaust pipe and rear engine mounts.
  8.  
  9. Remove the lower joint assembly from the steering gear pinion. Before disconnecting the lower ball joint set the steering gear assembly in neutral by making the wheels straight. Loosen the bolt and disconnect the lower joint. Matchmark the pinion shaft to the pinion housing to record the neutral gear position.
  10.  
  11. Remove the steering gear and linkage assembly from the vehicle.
  12.  

To install:
  1. Installation is the reverse of the removal procedure observing the following:
    1. Make sure the pinion shaft and pinion housing are aligned properly.
    2.  
    3. Torque the high pressure hydraulic line fitting to 11-18 ft. lbs. (15-25 Nm) and lower pressure fitting to 20-29 ft. lbs. (27-39 Nm).
    4.  
    5. When attaching the lower joint, set the left and right dust boots to equal deflection.
    6.  
    7. Torque the gear housing mounting bracket bolts to 54-72 ft. lbs. (73-97 Nm).
    8.  

  2.  

When installing the lower steering joint to the steering gear, make sure that the wheels are aligned with the vehicle and the steering joint slot is aligned with the steering gear cap or spacer mark.

  1. Refill the power steering pump, start the engine and bleed the system. Refill the power steering pump, start the engine and bleed the system.
  2.  

On most vehicles, the O-ring in the lower pressure hydraulic line fitting is larger than the O-ring in the high pressure line. Make sure the O-rings are installed in the proper fittings. Observe the torque specification given for the hydraulic line fittings. Over-tightening will cause damage to the fitting threads and O-rings.

ADJUSTMENTS



1987-90 Vehicles

See Figure 4



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Fig. Fig. 4: Use a special socket and inch lbs. torque wrench to adjust the steering gear

Adjustment is usually performed only after over haul and replacement of major parts. A special socket wrench KV48100700, or equivalent, must be used with an inch lbs. torque wrench in performing this work.

  1. Disconnect the unit and remove it from the car as previously outlined.
  2.  
  3. Rotate the pinion shaft from lock-to-lock, counting the turns. Then, divide the number of turns in half, and turn the shaft that distance from either lock to center it.
  4.  
  5. Loosen the locknut and loosen the adjusting screw. Then, torque it to 43 inch lbs. (4.87 Nm). Loosen it and torque it again to that figure.
  6.  
  7. Loosen the adjusting screw and torque it to 0.43-1.74 inch lbs. (0.048-0.197 Nm). Loosen the locknut and apply locking sealer to the lower threads of the adjusting screw as well as the retainer cover surrounding it. Then, tighten the locknut to 29-43 ft. lbs. (39-58 Nm).
  8.  
  9. Move the rack through its entire stroke several times. Then, install the torque wrench and special socket and measure the rotating torque of the pinion 100° either side of the neutral position. The torque should be 6.9-11.3 inch lbs. (0.78-1.28 Nm) with a maximum of 16 inch lbs. (1.8 Nm).
  10.  
  11. If the torque is incorrect, readjust the screw appropriately. When the rotating torque is correct, reapply sealer and retorque the locknut as necessary.
  12.  

1991-96 Sentra

See Figure 5



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Fig. Fig. 5: Power steering gear adjustment-1991-96 Sentra

  1. Set the rack to the neutral position without fluid in the gear.
  2.  
  3. Coat the adjusting screw with locking sealer and screw it in.
  4.  
  5. Lightly tighten the locknut.
  6.  
  7. Torque the adjusting screw to 43-52 inch lbs. (4.9-5.9 Nm).
  8.  
  9. Loosen the adjusting screw and retorque to 1.7 inch lbs. (0.2 Nm).
  10.  
  11. Rotate the pinion to move the rack back and forth 2 times. Return to the neutral position.
  12.  
  13. Slowly rotate the pinion and measure the rotating torque in a 180° range. Find the position where the rotating torque is maximum.
  14.  
  15. Loosen the adjusting screw at that position and torque the adjusting screw to 43 inch lbs. (4.9 Nm). Back it off of the adjusting screw 40-60°.
  16.  
  17. Prevent the adjusting nut from turning and torque the locknut to 29-43 ft. lbs. (39-59 Nm).
  18.  
  19. Measure the pinion rotating torque with an inch lbs. torque wrench. The normal torque should be 6.9-11.3 inch lbs. (0.8-1.3 Nm) and the maximum deviation is 3.5 inch lbs. (0.4 Nm).
  20.  
  21. If the rotating torque is not within specifications, readjust the rotating torque.
  22.  
  23. Check the steering gear does not bind.
  24.  

OVERHAUL



Overhaul of the power steering gear is recommended to be performed by qualified steering gear rebuilders. The cost for specific components may not be as cost effective as purchasing a rebuilt unit.

 
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