TM 5-3810-300-24&P-3
7.0 SERVICE TOOLS
ALINGNMENT TOOLS FOR TACHOMETER DRIVE COVER AND ADAPTORS
Whenever a tachometer drive cover assembly or a
of the tool when one complete hand rotation of the
tachometer drive adaptor is installed on an engine, it is
engine is made.
important that the cover assembly or adaptor by aligned
properly with the tachometer drive shaft.
Misalignment of a tachometer drive shaft can impose a
side load on a tachometer drive cable adaptor resulting
in possible gear seizure and damage to other related
components.
Use one of three tools in set J 23068 to establish the
proper alignment. Figure 1 illustrates the use of the
tools.
Because of the many different combinations of
tachometer drive shafts, covers and adaptors available, it
is not practical to itemize specific usages for each tool.
When confronted with an alignment job, test fit each tool
to determine which provides the best fit and proceed to
make the alignment with that tool.
Fig. 1. -Checking Tachometer Drive Shaft Alignment
Correct alignment is established when there is no
tachometer drive shaft bind on the inside diameter
SPECIFICATIONS
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
SIZE NUT
SIZE NUT
SIZE NUT
OR BOLT
(Ib-ft)
OR BOLT
(Ib-ft)
OR BOLT
(Ib-ft)
1/4 - 20 ................................ 7-9
7/16- 20 .......................... 57-61
3/4- 10 ...........................240-250
1/4 - 28 ................................ 8-10
1/2 - 13 ........................... 71-75
3/4- 16 ...........................290-300
5/16 - 18 .............................. 13-17
1/2 - 20 ........................... 83-93
7/8 - 9 ............................410420
5/16 - 24 .............................. 15-19
9/16 - 12 ......................... 90-100
7/8 -14 ...........................475-485
3/8 - 16 ................................ 30-35
9/16 - 18 ......................... 107-117
1 - 8 ...............................580-590
3/8 - 24 ................................ 35-39
5/8 - 11 ........................... 137-147
1 - 4 ...............................685-695
7/16 - 14 .............................. 46-50
5/8 - 18 ........................... 168-178
SERVICE TOOLS
TOOL NO
TOOL NAME
J 2619.........................................................................................................................Slide Hammer
J 5901-3......................................................................................................................Tachometer Drive Shaft Remover
J 23068.......................................................................................................................Tachometer Alignment Tool
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