Power Steering System - Noisy
Article No.93-26-5
12/22/93
^ STEERING - POWER - NOISE, AIR IN SYSTEM - PROCEDURE TO PURGE AIR FROM SYSTEM
^ NOISE - POWER STEERING - AIR IN SYSTEM - PROCEDURE TO PURGE AIR FROM SYSTEM
FORD:
1990-94 CROWN VICTORIA, MUSTANG, TAURUS, TEMPO, THUNDERBIRD
LINCOLN-MERCURY:
1990-92 MARK VII
1990-94 CONTINENTAL, COUGAR, GRAND MARQUIS, SABLE, TOPAZ, TOWN CAR
1993-94 MARK VIII
LIGHT TRUCK:
1990 BRONCO II
1990-94 AEROSTAR, BRONCO, ECONOLINE, F-150-350 SERIES, F-47, RANGER
1991-94 EXPLORER
This TSB Article is being republished in its entirety to include 1994 model year vehicles and to update the service procedure. This TSB article supersedes TSB 93-7-3 and TSB 93-3-4.
ISSUE:
Noise heard from the Power Steering Pump may be caused by air in the system.
ACTION:
Purge all air from the system to eliminate any noise caused by air. Perform the following "Purge Air From Power Steering System" service procedure for either of the following conditions:
^ For Pre-Delivery vehicles with power steering noise complaints and evidence of aerated fluid. If noise. persists, proceed with service diagnostics and repair procedures.
^ For all other vehicles following the disconnecting/decoupling of any power steering hydraulic connections/couplings or for vehicles with evidence of aerated fluid. This does not include fluid top off procedures.
NOTE:
IF THE AIR IS NOT PURGED FROM THE POWER STEERING SYSTEM CORRECTLY, A SECOND CUSTOMER CONCERN OR PUMP FAILURE COULD RESULT. THIS CONDITION CAN ONLY OCCUR ON PRE-DELIVERY VEHICLES WITH EVIDENCE OF AERATED FLUID OR VEHICLES THAT HAVE HAD STEERING COMPONENT SERVICE.
FLUID LEVEL TOP OFF - PROCEDURE
1. Check and fill pump reservoir to dipstick FULL COLD or remote reservoir center mark.
2. Disable ignition by disconnecting the EDIS/DIS/TFI module or, for remote TFI, disconnect CMP/Hall Effect/PIP sensor.
NOTE:
ON 7.3L DIESEL VEHICLES, THE FUEL SHUTOFF SOLENOID (ON THE INJECTION PUMP) MUST BE DISCONNECTED TO PREVENT STARTING.
3. Crank engine 30 seconds, check fluid level and add if required.
4. Crank engine 30 seconds while cycling the steering wheel lock to lock.
NOTE:
DO NOT HOLD STEERING WHEEL ON STOPS.
5. Check fluid level and add fluid if required.
AIR PURGE WITH VACUUM EXTERNAL SOURCE - PROCEDURE
1. Tightly insert the rubber stopper of the air evacuator assembly into pump reservoir.
2. Reconnect connection used to disable ignition and start vehicle.
3. Apply 20-25 in-Hg. (68-86 kPa) maximum vacuum for minimum of three minutes at idle; maintain maximum vacuum with vacuum source. Refer to Figure 1.
4. Release vacuum and remove vacuum source.
5. Add fluid to FULL WARM or reservoir center mark.
6. Reinstall vacuum source and apply 20-25 in-Hg (68-85 Kpa) vacuum.
7. Cycle steering wheel from lock to lock every 30 seconds for approximately 5 minutes.
NOTE:
DO NOT HOLD STEERING WHEEL ON STOPS.
8. Shut engine off, release vacuum and remove vacuum source.
9. Add fluid if necessary and install dipstick or reservoir cap.
10. Start engine and cycle steering wheel from lock to lock every 30 seconds for approximately 5 minutes.
NOTE:
DO NOT HOLD STEERING WHEEL ON STOPS.
11. Check for oil leaks at all connections.
NOTE:
IN SEVERE CASES IT MAY BE NECESSARY TO REPEAT AIR PURGE WITH VACUUM SOURCE PROCEDURE.
PART NUMBER PART NAME CLASS
E6AZ-19582-AA Power Steering Fluid V
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 93-7-3
WARRANTY STATUS:
Eligible Under Basic Warranty For 1990-91 Model Ford, Mercury And Lt. Trucks And Major Component Coverage For 1990 Model Lincolns. Eligible Under Bumper To Bumper For 1992 And Later Model Ford, Mercury And Light Trucks And 1991 And Later Model Lincolns.
OPERATION DESCRIPTION TIME
932605A Purge Power Steering 0.5 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
3A674 56
OASIS CODES: 303000, 702000, 702100