The coolant heater control unit (4) senses high and low input voltage. The control unit
(4) will initiate a low/high voltage shutdown if the input voltage drops below 20 VDC or
rises above 30 VDC. This type of shutdown typically indicates a problem with the
crane's batteries and/or it's charging system.
The coolant heater's electrical connections are protected by a 15A in-line fuse (16),
located in the crane's battery box at the battery connections, and a second 5A in-line
fuse (19), located in the coolant heater boxed enclosure. The 15A in-line fuse (16)
protects the main 24 VDC input.
ASPHYXIATION HAZARD. Ensure that exhaust fumes cannot enter the
cab. Failure to comply with this warning could result in personal injury or
death from asphyxiation.
The engine coolant heater exhaust is hot, ensure a minimum clearance of
2 inches (5 cm) from any heat sensitive material. Failure to follow this
warning could result in personal injury and/or damage to the crane.
Ensure that the engine coolant heater exhaust outlet and pipe cannot be
pipe does not face the crane slipstream.
Ensure the engine coolant heater combustion air intake opening cannot
intake opening does not face the crane slipstream.
Ensure the battery disconnect switch is in the OFF position prior to
starting installation of the coolant heater.
Fuel Tank Modification. (Refer To Figures J-2 and J-3.) Modify the crane's fuel tank as follows:
Drain and remove the fuel tank in accordance with the technical manual, TM 5-3810-
Mark the centers for the two 0.25" and one 1.0" diameter hole in accordance with the
dimensions shown on Figure J-2 and create an indent in the centers using a punch.
Drill the two 0.25" diameter holes in the fuel tank.
Blow shavings away while drilling to reduce amount of shavings that may
fall into fuel tank.