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TM 9-2320-285-24-1
2-86.
TACHOMETER MAINTENANCE (CONT)
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
5
a. Tachometer head Inspect
Replace if cracked, broken,
(9) and
or inoperative If electri-
sender unit
cal contacts dirty or dis-
(13)
colored, polish to bright-
ness with fine sandpaper
b. Electrical
Inspect
Replace if insulation frayed,
leads (3, 4,
cut, or cracked or if con-
5, and 10)
ductor corroded or broken
c.  Drive assembly
Inspect
Check for freedom of rota-
(18)
tion. Replace if bound or
frozen
d. All other parts
Inspect
Replace if cracked, broken,
distorted, or threads
damaged
INSTALLATION
CAUTION
Be sure you do not drop any parts into engine in following steps. Removal of dropped parts
may require partial engine disassembly (notify direct support maintenance). Do not start
engine unless dropped part is removed to prevent foreign object damage to engine.
6
Engine,
a. Fork (23)
Install
rear
b. New gasket (22)
Position
c.  Flange (21) and
Install
Tighten capscrews (20)
two capscrews
(20)
d. New gasket (19)
Install
On drive assembly (18)
e. Drive assembly
Install
(18) and
clamp (17)
f.  Capscrew (16)
Tighten
g. Nut (15)
Tighten
Hold capscrew (16) station-
ary while tightening nut
h. Drive tip (14)
Install
and sender
i.
Rubber boot
Position
Slide onto electrical leads
(24)
(3, 4, and 10)
j.
Three electri-
Connect as
Lead (3) to "+" terminal;
cal leads (3,
tagged
lead (4) to "S" terminal;
4, and 10)
lead (10) to "-" terminal
k.
Three nuts (11)
Install and
and lock
tighten
washers (12)
2-920

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