Chevrolet 70 1969 Series, Руководство по ремонту

Страница: 681 / 913

E N G IN E 6-10
V IE W A - IN S T A L L IN G N o. 3 B E A R IN G
Sh aft (J -2 1099-9)
N o . 2 Pilot
A d a p te r
(J-2 10 99-4)
/
/
A?
&a -x
C -W a sh e r
D r iv in g Button
(J-2109 9 -1 1 )
V IE W B - I N S T A L L I N G N o. 1 B E A R IN G
(J -2 1099-12)
Figure 14— In sta llin g C a m s h a f t B e a r in g s w ith Tool Set ( J - 2 1 0 9 9 -1 5 )
4. If engine is in vehicle, the No. 4 camshaft bearing
must be removed toward front. Washer ( J- 2 1099-8,
fig. 10) is placed behind rear bearing after cover plate
is removed, and shaft is inserted through front pilot
( J- 2 1099-13) and bolt with plain washer is used to an­
chor washer to end of shaft (fig. 11). Use slide h a m ­
mer (J-2619), attached to front of shaft, to pull rear
bearing forward out of bore.za
If flywheel housing is removed from cylinder block,
the rear bearing may be driven rearward by attach­
ing adapter (J-21099-7) to rear end of shaft and
using driving button ( J - 2 1099-1 I ) on front of
shaft.
NOTE: All camshaft bearings can be pulled for­
ward through block by using slide hammer
( J - 2 6 1 9 ) i nst e a d of driving button (J-
21099-11). Use same adapters for this
method as are listed in chart for driving
bearings out, except when removing front
(No. 1) bearing, use adapter (J-21099-5)
instead of adapter (J-21099-4). Adapter
(J-21099-4) cannot be used behind front
bearing due to lack of space.
C A M S H A F T B E A R IN G IN ST A LLA T IO N
1. Use suitable tool to break sharp corner and provide
chamfer at forward edge of each bearing bore in
block.
2. Locate camshaft No. 4 service bearing at bore in cyl­
inder block. Be sure split in bearing is on top and
chamfered end of bearing is toward rear as shown in
Figure 13. Use adapter ( J - 2 1099-7) on rear end of re­
placer shaft and insert front pilot ( J- 2 1099-13) in No.
1 bearing bore. With driving button on front end of
shaft, drive the bearing in so front edge of bearing is
flush with front face of bore.
3. Install No. 3 bearing in cylinder block in same m a n ­
ner as previously described for installing No. 4 bear­
ing, except use adapter ( J - 2 1099-6) to drive bearing
into place (View A, fig. 14).
4. To install No. 2 bearing, use adapter ( J - 2 1099-5) and
C-w'asher ( J- 2 1099-12) on shaft to drive bearing into
place.
5. Referring to View “ B" of Figure 14, place No. 2 pilot
( J - 2 1 0 9 9 - 5 ) in N o . 2 b e a r i n g , slide a d a p t e r (J
21099-4) on shaft, and place No. I (front) bearing on
adapter with chamfered edge toward rear. With C-
washer (J-2 1099-12) in groove in shaft and drive but­
ton on forward end of shaft, drive No. 1 bearing into
place. No. 2 pilot serves to center the shaft so bearing
is held square with bore as it is driven into place.
Front edge of No. 1 bearing should be 0.010 to 0.030
inch beyond (to rear of) front face of block.
IMPORTANT: Be sure to remove from cylinder
block any shavings or metal particles which
may have resulted from the bearing installation
procedure. Also recheck each bearing position
to see that the split in each bearing is toward
top of cylinder block.
6. After camshaft bearings have been installed, install
plug (or plate and gasket) at bearing bore opening in
rear of cylinder block.
7. When hole plug is used, coat outer edge of new c a m ­
shaft bearing hole plug with sealing cement, then
drive plug into rear bearing bore until 0.030 inch
below rear face of block. Engines without the ca m ­
shaft hole plug have either a cover plate and gasket or
a tachometer drive unit.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L