Thwaites SPRITE NIMBUS, Руководство пользователя

Страница: 37 / 54

(i) The amount of variation away from zero gives the amount of shim adjustment
required.
(ii) If a change in shim pack is required it is essential that a corresponding opposite
change takes place under the outer pinion bearing cup, i.e. if .003" is removed from
the inner bearing cup shim pack to give correct pinion height, the .003" must be
added to the outer bearing cup shim pack. This is in order to maintain the correct
preload for the two bear-ings as given in chart 2.
When the correct pinion setting has been obtained, check the pinion bearing
preload, which should afford a slight drag or resistance to turning, there being no
end play of the pinion. The correct preload for the pinion bearings gives a torque
figure as listed in Chart 2. Less than the correct range will result in excessive
deflection of the pinion under load, whilst too much preload will lead to pitting and
failure of the bearings. To rectify the preload adjust the shim pack between the outer
bearing cone and the pinion shank or spacer but do not touch the shims behind the
inner bearing cup, which control the position of the pinion. Remove shims to
increase preload and add shims to decrease preload.
ASSEMBLY OF GEAR & BEARINGS ONTO DIFFERENTIAL CASE:
39. Assemble ring gear onto differential case and bolt together by gradually and evenly
tight-ening the bolts. Do not tighten one bolt at a time but work on diametrically
opposite bolts. This ensures the ring gear is seated correctly on the case. It is
advised to use loctite ‘Studlock’ grade or similar locking compound on the bolt
threads. Do not use excessively and remove any surplus. Tighten bolts to torque
figure given in chart 2.
40. Assemble differential bearing cones to differential case using press and suitable
adaptor. NOTE: When pressing second bearing cone onto case, seat first bearing
cone into its cup in order to prevent damage to bearing cage etc.
Fig. 19.
3-2-14