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 TM 9-2320-360-20-2
7-14. TACHOGRAPH REPLACEMENT (CONT)
b. Installation
NOTE
Tachograph is installed properly
when three receptacles are facing top
of instrument panel.
(1) Install tachograph (1) in instrument panel
(2).
(2) Install two support brackets (3) and
knurled nuts (4) on tachograph (1).
(3) Install receptacle (5) in center housing
connector (6) of tachograph (1).
c. Follow-On Maintenance
Install instrument panel (para 7-13).
d. Placing in Service
NOTE
Perform this sub-paragraph only
when installing a new tachograph.
(1) Start engine (TM 9-2320-360-10).
NOTE
Hold engine speed steady for several
seconds before checking.
(2) Check tachograph RPM displayed at idle.
Tachograph should indicate 575-625
RPM.
TABLE 7-0.2
(3) Check tachograph RPM displayed at full
DDEC DDR
ALLOWABLE TACHOGRAPH
throttle.
Tachograph should indicate
ENGINE SPEED
ENGINE SPEED
2125-2225 RPM.
600
570-600
NOTE
1000
955-1000
Continue with steps (4) and (5) only if
1500
1433-1500
previous results were not within
2000
1910-2000
specifications.
(4) Connect Diagnostic Data Reader (DDR)
(para 2-13).
(5) Operate the engine at 600, 1000, 1500,
and 2000 RPM as indicated by the DDR.
Compare the tachograph RPM indicated,
at each speed, with the DDR displayed
RPM.
(6) Replace the tachograph if the results are
not within specifications shown in
7-48 Change 1
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