TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 302 of 779
6-8
(1)
Removal. Drill
out bearing retaining
pins when used to secure bearings in castings or
retaining cages when applicable.
(2) Installation.
(a) Aline bushing, liner, or bushing-type
bearing in casting or retaining cage. Press into
place with a suitable pressing arbor.
(b) Select proper drill size for installation
of bearing retaining pins. Drill through bearing
and into casting or retaining cage to the proper
depth so that the pin will be flush with the
bearing surface after installation. Drive retaining
pin through bearing and into casting or retaining
cage. Cut off any portion of pin that extends
above bearing.
(c) Ream or burnish bushing liner, or
bushing-type bearing to size specified in ap-
propriate overhaul standards table.
(d) Clean repaired parts thoroughly
before assembly or installation.
j. Oil Seals.
Replace all oil seals at engine
overhaul.
During field repair, replace oil seal
when thin feather edge is damaged or when seal
has become hard or brittle.
(1) Removal. Press or pry damaged oil seal
from casting or adapter, being careful not to
damage bore in casting or adapter.
(2)
Repair.
When oil seal bore in casting or
adapter is burred or damaged to a point where
an oil-tight seal is impossible, repair or replace
casting or adapter. Remove slight nicks, burs,
and scratches from oil seal bore in casting or
adapter with crocus cloth dipped in dry-cleaning
solvent or mineral spirits paint thinner.
(3) Installation.
Install new oil seal in bore
of casting or adapter.
6-5.
Replacement of Helical-Coil and
Threaded Inserts
a. General.
Replace all helical-coil and screw
thread inserts which do not fit securely in the
casting or when casting threads have become
galled or stripped.
b.
Replacement.
Replace
all
unserviceable
helical-coil and screw thread inserts in the same
manner, following instructions which accompany
figures 6-2 and 6-3. For instructional purposes
helical-coil inserts in the cylinder assembly will
be replaced.
1. Use a diamond-shaped punch is the insert (A) is the
serrated-teeth type to drive staked, serrated-teeth
section of insert from the thread in cylinder casting.
2. Install screw thread extractor - 5120-251-1527 into
insert. Remove insert by applying constant pressure
while turning extractor (B) counterclockwise until
insert is removed.
Figure 6-2. Removing helical-coil threaded
insert from cylinder assembly using screw
thread extractor-5120-251-1527.5
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