TM 9-2320-279-10-2
M984E1 General Operating Procedures (Cont)
2-82. TOW M939 (CONT).
(47)
Set PTO ENGAGE switch (43) to OFF position.
(48)
Push in TRAILER AIR SUPPLY control (44).
(49)
Turn on service drive lights (para 2-10d).
(50)
Turn on emergency flashers on wrecker (para 2-44a) and disabled
(51)
Push in PARKING BRAKE control (45) and select desired gear
(para 2-11e).
WARNING
The M984E1 should not be operated at speeds over 15 mph except on paved
roads when the operator determines that the vehicle being towed and the terrain
allow safe operation. Engine brake switch must be "On" for all towing operations.
The following are maximum safe speeds.
Maximum speed,
Maximum speed,
Terrain
Conditions
towed load up to
towed load above
50,000 lbs (22,681 kg)
50,000 lbs (22,681 kg)
On Road - Level
30 mph (48 kmh)
Standard Tire
35 mph (56 kmh)
Sand Tire
15 mph (24 kmh)
15 mph (24 kmh)
On Road - Hilly
Standard Tire
30 mph (48 kmh)
20 mph (32 kmh)
Sand Tire
15 mph (24 kmh)
15 mph (24 kmh)
Off Road
Standard Tire
15 mph (24 kmh)
15 mph (24 kmh)
Sand Tire
15 mph (24 kmh)
15 mph (24 kmh)
Speeds in excess of the above can result in loss of control, serious injury or death.
(52) Transport disabled vehicle.
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