INSPECTION - TM-9-2320-285-24-10943

TM 9-2320-285-24-1

2-86.

TACHOMETER MAINTENANCE (CONT)

STEP

LOCATION

ITEM

ACTION

REMARKS

INSPECTION

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.

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

Rubber boot

Position

Slide onto electrical leads

(24)

(3, 4, and 10)

Three electri-

Connect as

Lead (3) to "+" terminal;

cal leads (3,

tagged

lead (4) to "S" terminal;

4, and 10)

lead (10) to "-" terminal

Three nuts (11)

Install and

and lock

tighten

washers (12)

2-920