TM-9-2320-428-10
TRUCK, CARGO, 8X8, M977
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 2009
TM-9-2320-428-10 - Page 169 of 1072
Table 1.
Heater Compartment Controls and Indicators. - Continued
Key
Control/
Indicator
Function
Indicator
(M985E1only)
15
High Idle
Switch (M1977
only)
When set to ON position, increases engine speed (RPM) from
low to high for operating CBT/LHS equipment.
16
PTO ENGAGE
Control
Turns electrical power to power take-off (PTO) ON/OFF.
17
PTO ENGAGE
Indicator
Illuminates (red) when PTO ENGAGE control is set to ON
position.
JACOBS
CAUTION
ENGINE BRAKE
24
25
22
21
20
19
18
23
Figure 3.
18
Trailer
Handbrake
Control
Used to test the trailer brakes. Pull control lever back to apply,
push forward to release trailer brakes.
TM 9-2320-428-10
0022
0022-5
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