Engine - Accessory Drive Belt Chirping Noise
NUMBER: 19-007-04GROUP: Steering
DATE: September 09, 2004
SUBJECT:
Accessory Drive Belt Chirp Due To Power Steering Pump Pulley Alignment
OVERVIEW:
This bulletin involves verifying the alignment of the power steering pump pulley.
MODELS:
2004 (TJ) Wrangler
SYMPTOM/CONDITION:
The customer may experience a chirp-like sound coming from the accessory drive belt.
The chirp-like sound may become more pronounced at higher engine speeds.
Investigation may reveal accelerated accessory drive belt wear even though the belt is properly installed on all pulleys.
The accessory drive belt chirp-like sound may be caused by the mis-alignment of the power steering pump pulley to the shaft of the power steering pump. The pulley may have been installed too far (over-installed) onto the pump shaft. The front surface of the power steering pump pulley hub should be flush with the end of the power steering pump shaft.
DIAGNOSIS:
Determine if the front end of the power steering pulley hub is flush with the leading edge of the power steering pump shaft.
If the above Symptom/Condition is present, and the front end/edge of the power steering pulley hub is not flush with the leading edge of the power steering pump shaft, then perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS/EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1. Disconnect the negative battery cable from the battery.
2. Install Matco MST93 puller tool, or equivalent, on the steering pump pulley. Align the power steering pump pulley so that the front surface/face of the pulley hub is flush with the end of the power steering pump shaft. Maximum tolerance is 0 +/- 0.127 mm (0.005 in.) (Fig. 1).
3. Install a new accessory drive belt. Make sure the belt is properly seated to all pulleys.
4. Connect the negative battery cable to the battery.
NOTE:
Know that the 2004 Wrangler Service Manual, in Section 19 - STEERING / PUMP / PULLEY / INSTALLATION, offers additional insite for the technician regarding power steering pump pulley alignment.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.