Wheel Alignment - Front Tire Wear on Postal Vehicles
90chevy16Number: 90-117-3A
Section: 3A
Date: February 1990
Corp. Bulletin No.: 963101
Subject: FRONT END, ALIGNMENT REVISIONS
Model and Year: 1987-90 POSTAL VEHICLES (LLV)
Some of the above postal vehicles are experiencing excessive front tire wear. To alleviate this problem, and reduce tread wear, the following revised camber and toe-in specifications (see table 1) have been developed.
INSPECTION BEFORE ALIGNMENT
Before making any adjustments affecting caster, camber, or toe-in, the normal front end inspections should be made. (Refer to Section 3 of the Light Duty Service Manual.)
Figure 1:
IMPORTANT: Tires should be checked for proper inflation (50 psi is the specification of the LLV). Due to the severe duty cycle of the LLV a 3 month or 5,000 mile rotation is recommended. (See Figure 1.)
Vehicles Built after the following VIN are set to the new alignment specifications:
1GBBS10E9K2312849