TRUCK SERVICE MANUAL
Do not use drill rated less than 10 amperes or over 450
11. To cut next journal:
a. Remove cutter holder from boring bar.
b. Pull out on plastic knob on feed assembly and turn one-fourth
c. Push in on feed shaft (the knob) until it stops against feed
d. Turn plastic knob one-fourth (1/4) turn, until pin seats in slot.
e. Repeat Steps 9 and 10.
12. Clean block and check size of bore with a dial bore gauge and
alignment with checking ring.
USE OF THE BRIDGES
The bridges and bearings are intended for additional support of boring
bar and are designed to compensate for any distortion of block oil pan
surface. It is not necessary to use bridges if centering rings are located
For example: If No. 1, 3, 4, 5 or 7 journals are to be bored and
centering rings are in 2 and 6 journals, bridges are not necessary.
1. Assemble bearing bar (ST-1177-22) on bearing bridge (ST-
1177-21) with hexagon head capscrew (ST-1177-23) finger tight.
2. Slide bearing over boring bar at point where support is
needed. Allow room for cutter holder, if next to journal being cut.
3. Lower line bore bridge (ST-1177-18) over bearing bar and
secure to oil pan rails.
4. Tighten socket head screw (ST-1177-25) in bearing until
bearing is snug on boring bar; do not restrict bar from turning.
5. Tighten hexagon head capscrew (ST-1177-25) in bearing bar
and socket head capscrew (ST-1177-19) in bridge.
6. Turn boring bar to see that it is free.