Wheels - TC Steel Wheel

Bulletin No. T 84-14
File In Group 3E
Number 15
Date Nov. '83
SUBJECT: "TC" STEEL WHEEL

MODELS AFFECTED: 1983 ELDORADO AND SEVILLE

Figure 1 - New Steel Wheel (w/o flanged pilot hole):

Figure 2 - Existing Steel Wheel (w/ flanged pilot hole):

In May, 1983, a new steel wheel, code "TC", P/N 9590967 (Figure 1), was put into production at Linden. This wheel was designed to replace existing Steel Wheels (Figure 2) for the Eldorado (B/P-652448) and Seville (B/P-824039). In addition, the new wheel may be used as a service replacement for existing steel wheels back to the 1979 "E" and 1980 "K" models.

This wheel incorporates a new manufacturing process in which the five bolt holes and the pilot hole are machined at the same time. Use of this process will eliminate many of the radial wheel runout conditions.

Some difficulty may be encountered when attempting to balance the first group of the new production steel wheels. These wheels, carrying a disc code "C" (March) stamped near the bolt circle, have a pilot hole design which interferes with the service balancer wheel mounting cones when the wheel is mounted from the back side. Accordingly, all wheels date stamped "C" should be mounted to a wheel balance machine with the wheel front side to the mounting cone. If mounted from the back side, the "C" stamped wheels may be off by about one ounce of static balance.

Wheels with a date stamp "E" (May) and later may be balanced in a conventional manner. No wheels date stamped "D" (April) were built.