Volkswagen Type II Transporter 1200 Series Shop Manual page 131

I
NOTE: To improve engagement, adjustment may only take
place in the inshift direction.
(13) Disengage reverse gear and engage the second gear.
In this position, check the clearance between the operating
sleeve and the sliding reverse gear. If necessary, the position
Transmission and Rear A.xle-50
should be rectified as explained in (ll) above. When
completed, tighten the union nut to a torque of 14ft/lb.
(14) Check the interlock mechanism. When one gear is
engaged, it must not be
possi~le
to engage another gear. All
shift rods are interlocked, one against the other.
J 3. FINAl. DRIVE AO.IIJSTMENT
Adjustment of the drive pinion and the ring gear is
absolutely necessary to ensure long rear axle service and
silent operation. To obtain this performance the ring gear
and the drive pinion are manufactured in sets and matched
by a special testing machine on which the set is run for
. some time in both directions and the contact pattern and
silent operation are carefully checked The most silent
operating position is obtained by the drive pinion being
moved axially and simultaneously moving the ring gear out
of the meshing position until the backlash is within the
tolerance range of .006"- .010". Every hypoid pinion and
ring set has a matching number stamped to identify the set
which must always be fitted together. For instance, a gear
set may be stamped K843, which means a Klingelnberg
pinion and ring gear set having a ratio of 8:43.
The matching number which must be stamped on the
pinion as well as the gear identifies the set.
Readjustment of the pinion and gear set is usually only
necessary after replacement of parts which directly effect
the adjustment. In the event of replacement of the
differential housing, a final drive cover or a differential
taper roller bearing, the ring gear only should be reseL
C"' Gear set make and ratio,
e.O.
Klingeinberg
8:43.
P
=
Gear set matching number;
n '" Pinion l)ead thickness variation,
e.g.
26
is
.25
mm.
Ro
=
Constant at 63 mm.
Vo .. Gear offset, 10 mm.
131
However, if the transmission. case or the complete pinion
and gear has been replaced, adjustment must be carried out.
In case the double taper roller bearing for the drive piniori
has been renewed, adjustment of the drive pinion only is
necessary .
The main purpose for the adjustment is to maintain the
same silent operating position set by . the manufacturer
during production.
The drive pinion must first be set in position by
inserting shims between the circlip on the double row taper
roller bearing and the transmission case so that the distance
from the centre line of the ring gear to the pinion end face
is exactly the same dimension as was obtained during
production of the vehicle.
The ring gear is then installed and carefully adjusted to
ensure that allowance is provided for the prescribed
pre-load between the taper roller. bearing and in addition
the prescribed amount of backlash exists between the ring
gear and the pinion teeth. To obtain this backlash, place
suitable shims between the transmission case and the final
drive covers.
By rotating the ring gear, the correct amount of
K043
312
c
p
Crownwheel and Pinion Markings.