TM 9-2320-273-20
PANEL MOUTED INSTRUMENTS.
5-66. TACHOGRAPH MAINTENANCE (Continued).
LOCATION/lTEM
ACTION
REMARKS
B. DISK PACK REMOVAL.
CAUTION
The disk pack must be changed before the end
of the seventh day to prevent stylus damage.
1. Key (6).
Unlock tachograph (3) with
key (6) and swing open.
2. Retainer (1).
a. Turn to the left and remove.
b. Lift out used disk pack (2).
NOTE
If pack is not properly instaIled, instruments
and dials may not function.
C. DISK PACK INSTALLATION. ]
3. New disk pack (2).
a. Enter date, driver’s name,
Enter in center field on disk
vehicle number and mile-
number one.
age.
b. Ensure pack is under sep-
arating knife (7) and under
tachometer lever (4).
c. Aline time at installation
with red dot (5) on disk.
d. With disk pack in position
on center hub, place re-
tainer (1) in place and turn
to the right.
4. Tachograph (3).
Swing up into closed position
and lock with key (6).
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