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(
a
)
Installation of Idler Hubs
(
a
) Parts of this document regarding the installation and maintenance of hubs are applicable ONLY if hubs are supplied by Timbren Industries Inc.
(
b
) Use a high temperature automotive type wheel bearing grease. We recommend using Lithium complex type products with NLGI consistency of 2, with additives for
EP (extreme pressure), corrosion and oxidation, dropping point of 419° F (min.) (or 215° C), with minimum viscosity index of 80.
(
c
) Always use NEW cotter pins (8).
Typical 5 Bolt Idler Hub Assembly
Fig. 1
Inboard
Outboard
b
( )
Grease inner and the outer bearings (
(3)&(5))
. Insert inner bearing in its housing on the inboard side of
hub
(4)
. Insert the grease seal
(2)
on top of the bearing and make sure it is fully seated. Turn hub around,
lift it and place it on the spindle
(1)
and slide it over into place. Insert outer bearing
(5)
. Put washer
(6)
and
install the castle nut
(7)
onto spindle. Tighten nut. Gently loosen it approximately 1/8 of a turn. Insert cotter
pin
(8)
through castle nut and spindle hole and then bend the end around the spindle with a screw driver or
plyers. Put the grease cap
(9)
and rubber plug
(10)
on.
1
2
4
3
5
6
7
8
9
10
An easy way to estimate a 5 lug bolt circle
is to measure from the center on one hole
to the BACK of the third hole.
Identifying the bolt pattern of a hub
545 hub
545 hub = 5 bolts on a 4.5” bolt circle
TIMBREN INDUSTRIES INC. - 1-800-263-3113 - [email protected]
The bolt circle is the diameter of an imaginary circle
formed by the center of the wheel hub
Typical Installation
