Mechanics

CHEVY PUMP REMOVAL

1995 Chevrolet S-10

Steering problem
1995 Chevy S-10 6 cyl Two Wheel Drive Automatic

step by step how do you remove the power steering pump to replace with a new pump
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Nasa
November 7, 2009.



REMOVAL & INSTALLATION

See Figures 2, 3 and 4

1. Position a fluid catch pan under the power steering pump.
2. Disconnect the feed and return hoses from the power steering pump, then drain the excess fluid into the catch pan.

On models equipped with a remote fluid reservoir, disconnect and plug the hose(s) in order to prevent system contamination or excessive fluid loss.

3. Remove the drive belt from the pulley.
4. Install a puller tool such as J-25034, or equivalent onto the power steering pump pulley. While holding the pilot bolt, turn the tool nut counterclockwise in order to press the drive pulley from the pump.

When installing the puller tool onto the power steering pump pulley, be sure that the pilot bolt bottoms in the pump shaft by turning the head of the pilot bolt.

5. On most models, it may be necessary to unplug the electrical connection from the A/C compressor, unfasten the compressor mounting bolts and set the compressor to one side without disconnecting the lines.
6. If equipped, unfasten the power steering filler tube bolt and remove the filler tube.
7. Remove the rear brace retainers and the brace.
8. Remove the power steering pump-to-bracket bolts and then remove the pump from the vehicle.

To install: 9. Position the pump to the vehicle and secure using the front retaining bolts to 22 ft. Lbs. (30 Nm) 2.2L engines. (50 Nm). On 4.3L engines tighten the bolts to 37 ft. Lbs. (50 Nm).
10. If equipped, install the rear brace and tighten the retainers to 22 ft. Lbs. (30 Nm) on 1994-98 2.2L engines. On 1999 2.2L engines, tighten the brace retainers to 37 ft. Lbs. On 1994 4.3L models tighten the retainers to 24 ft. Lbs. (33 Nm). On 1995-99 4.3L models, tighten the retainers to 31 ft. Lbs. (41 Nm).
11. If removed, install the A/C compressor.
12. If removed, install the filler tube and its retainer. Tighten the retainer to 15 ft. Lbs. (20 Nm).
13. Use a pulley installer such as J-25033 or equivalent to press the drive pulley onto the power steering pump. While holding the pilot bolt, turn the tool nut clockwise in order to press the drive pulley onto the pump. Check that the pulley is flush within 0.010 in. (0.25mm) of the shaft end.

When positioning the installer tool onto the power steering pump pulley, be sure that the pilot bolt bottoms in the pump shaft by turning the head of the pilot bolt.

14. Properly install the drive belt and, if applicable, adjust the tension.

Be sure to secure any hoses which may get in the way or rub other components.

15. Remove the caps, then connect the feed and return hoses to the pump.
16. Properly refill and bleed the power steering system.
17. Test drive the vehicle.

SYSTEM BLEEDING

1994 Models

1. Add fluid to the reservoir until the proper level is reached, then allow the fluid to settle for at least 2 minutes. Start the engine and let it run for a few seconds, then turn it off and check if the level has changed. Repeat this until the level remains constant.
2. Raise and support the front of the vehicle safely using jackstands under the frame to the wheels are free to turn.
3. Start and run the engine, then slowly turn the wheels in both directions (lightly hitting the stops) several times.
4. Stop the engine and check the fluid level. If necessary, add power steering fluid to obtain the level indicated on the reservoir.

Maintain the fluid level just above the internal pump casting. Fluid with air in it will have a light tan or milky appearance. This air must be eliminated from the fluid before normal steering action can be obtained.

5. Remove the jackstands and carefully lower the vehicle.
6. Start and run the engine while turning the wheel slowly from stop to stop.
7. Stop the engine and check the fluid level. If necessary, add fluid in order to obtain the proper indicated level.
8. If the fluid is extremely foamy, allow the vehicle to stand for a few minutes, then repeat the procedure through this step.
9. Road test the vehicle to make sure the steering functions normally and is free from noise.
10. Allow the vehicle to stand for 2-3 hours, then recheck the power steering fluid.

1995-98 Models

1. Turn the ignition OFF, then turn the wheel to the full left position.
2. Fill the reservoir to the FULL COLD level and leave the cap off.
3. Raise the front of the vehicle and support it with jackstands.
4. With the ignition still in the OFF position, turn the wheel lock-to-lock at least 20 times (on models with long return lines perform this procedure at least 40 times).
5. Ensure that the fluid level remains at the FULL COLD position. And that there is no spilled fluid or air bubbles that could indicate a loose connection or leaking O-ring seal.
6. Turn the ignition ON and with the engine idling check the fluid level. If the level is correct install the cap.
7. Return the wheels to the center position and lower the vehicle.
8. With the engine still running turn the wheel from side-to-side. If there is a smooth, noiseless and leak free operation the procedure is complete.
9. If there is a problem, check that the fluid is free of bubbles and that the O-rings and clamps are in good condition. If not replace the worn or damaged part(s) and repeat the bleeding procedure.

1999 Models

See Figure 5

A Mity Vac and power steering bleeder adapter J 43485 are required to perform the bleeding procedure.

Make sure none of the power steering hoses are touching any part of the vehicle and that all connections are tight.

1. Remove the power steering pump reservoir cap.
2. Fill the reservoir to the FULL COLD level and leave the cap off.
3. Attach the bleeder adapter to the Mity Vac, then position the adapter to the reservoir cap opening.
4. Apply 20 in. Hg. (67 kPa) and wait five minutes. The typical vacuum drop over this time period is 2-3 in. Hg. (6-10 k Pa).
5. If there is a bigger vacuum drop, perform the following procedure: A. Disconnect the pressure and return hoses from the pump.
B. Install the two plugs that were supplied with the bleeder adapter kit into the hose ports on the pump.
C. Apply 20 in. Hg. (67 kPa) and wait five minutes. If the vacuum drops again, repair or replace the pump.

6. Remove the adapter and reinstall the reservoir cap.
7. Start the engine and allow it to idle, then turn the engine off and check the fluid level.
8. If the fluid level is low, bring it to the proper level and repeat steps 3 through 6 until the fluid level stabilizes.
9. Start the engine and allow it to idle.

Do not turn the steering wheel lock-to-lock.

10. Turn the steering wheel 180-360 degrees in both directions five times.
11. Turn the engine off and check the fluid level.
12. Remove the power steering pump reservoir cap.
13. Attach the bleeder adapter to the Mity Vac, then position the adapter to the reservoir cap opening.
14. Apply 20 in. Hg. (67 kPa) of vacuum and wait five minutes.
15. Make sure the fluid level is correct and reinstall the reservoir cap.

Fig. Fig. 5: Attach the bleeder adapter and Mity vac to the power steering pump as shown and apply 20 in. Hg. (67 kPa) vacuum