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AVaY = Service Department
Date NOVEMBER 1981
ee
Aimy
Distribution No. 900-771-138UK
_ MODEL 900 . Subject: DANGER OF OVERTIGHTENING WHEEL NUTS
AND REVIEW OF WHEEL NUTS NOW USED
~ Some instances of incorrectly tightened wheel nuts have been brought to our ~ )
attention. We would, therefore, remind dealers to be aware of the following
points during normal servicing procedures.
Steel Wheels
-o,
am Used wheels should be checked around the wheel nut holes for any deformity
of the nut locating boss and the formation of cracks from the hole outwards.
~ Ensure that the conical face of the wheel nut does not protrude too far through
the hole.
i
LI | |
| Position of whee! nut in new wheel Limit of permissible wear using new wheel
nut
rr
If the wheel nut protrudes too far through the wheel due to over-
tightening or wear of the wheel nut/vheel conical seat, cracks can
form in the body of the wheel.
Torque wheel nuts to 64-73ft lbs.
Do not use impact wrenches.
continued/.....
Postal address
a GT G3tTAIN) LTD.
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900-771-138UK
_ Wheel Nuts
A review of the various wheel huts available is pictured below. Do not
interchange.
on.
Conical wheel nut for steel whetis up to Wheel nut with f!tange for aluminium
1981 year models wheels up to 1981 year models ~
Part.No. 89 09 145 Part No. 89 19 656 (19) 11973 EMS -
? ~ 89 39 787 (19) 22988 Turbo
o~
‘
|
Conical wheel nut for steel wheels as from Conical wheel nut for aluminium wheels as
1982 year models from 1982 year models
Part No. 89 47 277 Part No. 89 47 285
—
Special attention should be paid to the fact that the 1982 TRX wheel, whilst ,_—
similar at first glance to previous wheels, has conical wheel nut location
instead of sleeve nuts.
DH/DGS