Lotus Elise S1 Service Notes page 503

Lotus Service Notes
Section XA
XA.9 - FRONT HUB CLAMP BOLT SET - A111C0137S
bolts.
This set is applicable only to cars built before Sept. 1997 (approx. VIN W 1830) with M12 front hub clamp
If the car is to be used in a competition environment with the associated high level of chassis loading, it is
recommended to replace the front hub bearing M12 clamp bolts with an M16 clamp bolt set including thrust
washers, which allows a substantial increase in the clamping force applied to the inner bearing races. Cars
from the above change point have been factory built with the M16 bolt set.
Kit Contents
Front Hub Clamp Bolt Set
comprising:
Bolt, M16 x 100, bearing clamp
Nut, M16 Nyloc, bearing clamp bolt
Thrust Washer, outer
Thrust Washer, inner
Dust Shield, front wheel bearing
Washer, M 16x30x2
Part no. Qty
A111C0137S 1
A111W2185F 2
A111W3159F 2
A111C0117F 2
A111C0118F 2
B111C0076F 2
A111W4171F 2
The M16 clamp bolt set is a direct replacement for the M12 set, and it is recommended that at the time of
fitting, the hub is removed from the bearing and the condition of the hub spigot carefully examined. If any signs
of bearing inner race movement on the hub are evident, the hub and bearing should be renewed and assem-
bled with the new bolt set.
Inner thrust
washer
M16 bolt
Flat washer
Dust shield
Outer thrust
washer
M16 Nyloc nut
Hub
c37
Hub carrier
The replacement procedure is detailed in Elise Service Notes sub-section CG.4, but also note the following
points:
a) The M12 bolts are handed - RH thread on RH side, LH thread on LH side. The M16 bolts are not handed,
but use a higher torque setting of 210 Nm (previously 77 Nm).
b) The assembly configuration is as shown in the illustration, with the bolt head and dust shield on the inside,
and the nut on the outside. Note that the plain washer is fitted between the bolt head and dust shield.
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