TM 9-2320-260-20
14-49. TACHOGRAPH KIT MAINTENANCE (Contd)
g. Tachograph Adjustment
NOTE
Remove tachograph chart prior to adjustment.
1. Stop and go adjustment.
a. If base line records high, turn adjusting screw (30) left.
b. If base line records low, turn adjusting screw (30) right.
c. Close tachograph (20).
d. Start engine (TM 9-2320-260-10), let engine idle for five minutes, then drive for five minutes.
e. Recheck tachograph chart stop and go field. Adjust if needed.
2. Engine rpm/warning indicator light (25) adjustment.
a. If engine rpm/warning indicator light (25) fails to light at 2300 rpm, adjust tachograph (20).
b. If engine rpm/warning indicator light (25) comes on below 2300 rpm, turn adjusting screw (27)
right.
c. If engine rpm/warning indicator light (25) comes on above 2300 rpm, turn adjusting screw (27)
d. Close tachograph (20).
e. Road test truck (TM 9-2320-260-10) and bring engine speed to 2300 rpm for a short time.
If warning indicator light (25) fails to light at 2300 rpm, readjust.
3. Clock (26) adjustment.
a. To set clock (26), turn chart support (28) to proper time.
b. Turn lateral wheel (29) for final clock (26) setting.
c. Close tachograph (20).
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