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 TM 9-2320-285-24-1
2-86.
TACHOMETER MAINTENANCE (CONT)
STEP
LOCATION
ITEM
ACTION
REMARKS
INSTALLATION (cont)
6
l.
Rubber boot
Install
On sender unit (13)
(cont)
(24)
m. Transmission
Install
Para 3-17f
mount
7
Cab tilt
Cab
Lower
To normal operating
position
pump
8
Instrument
a. Tachometer head
a. Adjust
Turn adjustment screw on
panel
(9)
tachometer head to position
number 3
b. Install
In instrument panel
b. Bracket (8)
Position
c. Two lock wash-
Install and
ers (7) and
tighten
d. Three electri-
Connect as
Leads (3 and 5) to "BAT"
cal leads
tagged
terminal; lead (4) to "IGN"
(3 thru 5)
terminal
e. Two lock wash-
Install and
ers (2) and
tighten
nuts (1)
f. Tachometer
Install
light socket
with bulb
g. Instrument
Lower and
panel
secure
9
Battery
Battery ground
Connect
box
cable
TEST
10
Tractor
a. Test tachometer
Connect
b. Engine
Start
c. Test tachometer
Watch
Check accuracy of tractor
tachometer; error must be
less than five percent (100
rpm error at 2000 rpm).
Replace tachometer head (9)
or sender unit (13) if
tachometer error is more
than five percent
d. Engine
Stop
e. Test tachometer
Disconnect
2-921
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