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 TM 9-2320-285-24-1
2-86.
TACHOMETER MAINTENANCE
This task covers:
a.
Removal
c.
Inspection
b.
Cleaning
d.
Installation
e.
Test
INITIAL SETUP
Tools
Personnel Required
No. 1 Common Organizational Maintenance
Wheel Vehicle Mechanic HOS 63B
Socket wrench set
Equipment Condition
Combination wrench set
Paragraph Condition Description
Safety glasses
Parked on level surface; park-
Materials/Parts
ing brake applied; engine off.
Cleaning solvent
Item 1, Appendix C
2-34a
Battery ground cable
Clean cloths
Item 2, Appendix C
disconnected.
Fine sandpaper
Item 4, Appendix C
2-26g(1)
Instrument panel raised.
Tags
Item 14, Appendix C
3-17f
Transmission mount removed
Gasket
FSCM 72582 PN 5136678
(for tachometer drive removal)
Gasket
FSCM 72582 PN 5135978
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
NOTE
Tag and identify all electrical leads before disconnecting and removing.
1
Instrument
a. Tachometer
Unplug
From tachometer head; para
panel
light socket
2-26d(1)
with bulb
b. Three electri-
Tag
cal leads
(3 thru 5)
c. Two nuts (1)
Remove
and lock
washers (2)
d. Three electri-
Disconnect
From tachometer head (9)
cal leads
(3 thru 5)
e. Two nuts (6),
Remove
lock washers
(7), and
bracket (8)
f. Tachometer head
Remove
Lift from instrument panel
(9)
2-916
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