TM 5-3825-226-24
BASIC BLOCK
Place 1P2344 Centering Rings (1), with oiler (2) up,
at each end of block. If an end bore is distorted, use the
next good bore.
NOTE: There must be two good bores for locating
centering rings.
CENTERING RINGS IN BLOCK
1. 1P2344 Centering Rings. 2. Oiler.
Place original bearing caps (4) over the centering
rings (1). Tighten bolts (3) hand tight.
CENTERING RINGS INSTALLED
1. 1P2344 Centering Rings. 3. Bolts (four). 4.
Bearing caps.
BORING BAR INSTALLED
1.1 P2344 Centering Rings. 3. Bolts (four). 5.1
P2352 Boring Bar.
Oil boring bar (5) and insert it through centering rings
(1). Tighten bolts (3) to a minimum of 20 lb. ft. (25
N•m) and a maximum of 50 lb. ft. (70 N•m) while
spinning bearing bar (5) to check for binding. Centering
rings (1) must be seated in boring saddles after
tightening.
Slide boring bar (5) out of one end of block and
install bearing assemblies (6) on boring bar (5). Slide
boring bar (5) back through centering ring. Adjust
bearing by tightening bolt (7) until bar begins to bind,
then back off until boring bar (5) spins easily.
INSTALLING BEARING ASSEMBLIES
5. 1P2352 Boring Bar. 6. 1P2373 Bearing assembly
(two). 7. Bolt.
Install bridge assemblies (8) over bearing assemblies
(6). Position bridge assemblies (8) on block as shown
with thicker portion up.
NOTE: Bridge assemblies must be on block as shown
for tool holder clearance at each bore.
BRIDGE ASSEMBLIES INSTALLED
6. 1P2373 Bearing Assembly (two). 8. 1P2343
Bridge Assembly (two).
7.
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