Vehicle - Drift/Pull While Braking and Steering
Bulletin No. 002/95Issued 9/21/95
Revised 9/29/95
Category
R
Applicable Model/s
1991-94 Navajo
1994 B-Series
Subject
DIAGNOSTIC PROCEDURES DRIFT/PULL WHILE BRAKING and STEERING
The "Parts Information" portion of this bulletin is revised. Changes are highlighted by bold print. Replace the original page 3 with this revised page. ONLY this page and page 3 are being sent at this time, do not discard the entire bulletin.
APPLICABLE MODELS/VINS
1991 - 94 Navajo Model Vehicles
1994 B-Series Model Vehicles
DESCRIPTION
The procedures should be placed in the front of section "R" or "P" in the workshop manual. Refer to these instructions when troubleshooting "Drift/Pull" while braking complaints.
The contents are as follows:
^ Symptom Descriptions
^ Repair Procedures
^ Parts Information (current at the time of printing)
^ Warranty Information (current at the time of printing)
NOTE:
1. This Service Bulletin contains all current 1991-94 Navajo and 1994 B-Series Steering and Braking Drift/Pull issues and known repair and parts information.
2. Refer to the workshop manual for symptoms other than those described above.
3. READ THIS BULLETIN COMPLETELY PRIOR TO PERFORMING ANY DIAGNOSTICS OR REPAIRS.
4. Place a copy of this bulletin in the applicable workshop manuals.
CONTENTS:
Symptom "A Drift/Pull While Braking
General Information
Repair Procedure
Warranty Information
Symptom "B" Drift/Pull While Not Braking
General Information
Repair Procedure Overview
Procedure 1 "Tires Mis-Matched"
Procedure 2 "Alignment"
Procedure 3 "Tires"
Procedure 4 "Steering Gear"
Procedure 5 "Rubber Ball Socket"
Procedure 6 "Brake Imbalance"
Procedure 7 "Miscellaneous"
Warranty Information
SYMPTOM A - DRIFT/PULL WHILE BRAKING
GENERAL INFORMATION
Some vehicles may experience pulling/drifting to either side while braking. If a customer complains of this problem, perform the following repair procedure.
REPAIR PROCEDURE
1. Verify the complaint. If the vehicle pulls/drifts while braking, proceed to step 2. If the vehicle pulls/drifts while not braking, refer to diagnostic and repair procedures.
2. Remove the pins from the caliper.
3. Hold the caliper in place against the bottom pin rails. Refer to Fig. 1.
4. Measure the clearance between the caliper and the top pin rails.
Clearance should be within 0.5-0.9 mm (0.020-0.035 in.)
5. If the clearance is too small, replace the caliper and measure again. If the clearance is still not within the specified amount, replace the knuckle.
NOTE:
Check the clearance of the new knuckle before installation.
6. After confirming clearance (between the caliper & knuckle), remove both calipers and inner pad assemblies.
7. Remove the anti-rattle clips from the inner pads.
8. Check the side and end clearance with a feeler gauge. Refer to Fig. 2.
Pad Tab Clearance (Without Anti-Rattle Clips)
MAX MIN
Side 0.5 mm (0.026 in) 0.25 mm (0.010 in)
End 1.2 mm (0.047 in) 1.0 mm (0.039 in)
9. If the pad clearances are within specification proceed to step 12.
^ If not within specification, proceed to step 10.
10. File the backing plate removing equal amounts of material from both sides. Refer to Fig. 3.
WARNING:
Wear Safety Glasses when filing backing plate.
CAUTION:
Do not grind backing plate. It is possible to remove too much material when grinding.
11. Check the tab clearance.
12. Install the anti-rattle clip on the lower pad tab.
13. Apply a light coat of "anti-seize" solution to the inner knuckle top and bottom pad groove and the caliper rail.
CAUTION:
DO NOT ALLOW ANTI-SEIZE SOLUTION TO CONTACT ROTOR, PAD LINING OR DUST BOOT.
14. Inspect the left and right side radius arm bushings for cuts or deterioration. Replace as necessary. Refer to section R of the applicable workshop manual. Refer to Fig. 4.
15. Verify repair. If pulling/drift still occurs, proceed to Symptom "B" - Pull or Drift While Not Braking.
SYMPTOM "A" PARTS INFORMATION
INTERCHANGEABILITY "A" = A new part can be used in place of an old part but an old part can not be used in place of a new part.
SYMPTOM "A" WARRANTY INFORMATION
(Applies To Verified Customer Complaints On Vehicles Covered Under Normal Warranty. Refer To The SRT Microfiche For Warranty Terms)
Warranty Type: A
Symptom Code: 39
Damage Code: 9H
Part Number Main Cause: Refer to Parts Information
Operation Number: YY0072RX
Labor Hours: 1.3 (Left and Right Sides)