5. Turn the puller screw down against
the end of the shaft to remove the gear.
6. Remove the gear from the balance
shaft in a similar manner
7. If necessary, remove the two weight
retaining bolts and remove the balance
weights from each gear.
8. If necessary, remove the keys from
the camshaft and balance shaft.
Inspection
Clean the gears with fuel oil and dry
them with compressed air. Then examine
pitting and wear.
If severely damaged
o r w o r n , install a new gear. Also check
the other gears in the gear train.
(Camshaft or Balance Shaft)
I n s t a l l Camshaft and Balance Shaft
Gears
5. Use gear installer J 1903 as shown in
1. Install the balance weights, if re-
the gears on the camshaft and balance
moved, on the gears.
shaft.
2. Lubricate the shaft journals and place
6. Start the gear retaining nuts on their
the camshaft and balance shaft end bear-
respective shafts by hand. Tighten the
i n g s i n p l a c e , with the bolting flanges
nuts after the shafts have been installed
facing toward the gear ends of the
in the cylinder block.
shafts. Install the thrust washers be-
7. Install the camshaft and balance shaft
shoulders of the shafts, and between the
in the engine.
8. With the shafts and the front balance
NOTE
weights installed, wedge a clean cloth
between the camshaft and balance shaft
Be
sure
the
steel
face
of
the
gears a n d t i g h t e n t h e g e a r r e t a i n i n g
thrust washers are next to the
nuts to 300-325 lb-ft (407-447 Nm) tor-
bearings.
que.
9. Secure the nuts with retainers, re-
3. Install the Woodruff keys for the
tainer bolts and lock washers.
gears in both shafts.
10. Check the backlash between the mat-
The backlash should be
ing gears.
4. Note that the teeth on one gear form a
0.003" to 0.008" with new parts or 0.010"
right hand helix and on the other a left
hand helix.
m a x i m u m with used parts.
When viewing the engine
from the flywheel end, the gear with
r i g h t hand helical teeth is located on the
left side and the gear with the left hand
IDLER GEAR AND BEARING ASSEMBLY
helical teeth is located on the right side
of the engine.
With this in mind, rest
the non-gear end of the camshaft on a
Description
wood block and start the gear on the
The idler gear is mounted on a double
other end of the shaft by hand so the
row, t a p e r e d r o l l e r b e a r i n g w h i c h , i n
keyway aligns with the key and with the
flat finished face of the gear away from
the bearing.
Engine (Less Major Assemblies)
11B-105
