Dynapac CC424HF - Short Distance Towing with the Engine Running; Short Distance Towing When the Engine Is Inoperative

Miscellaneous
ICC424HF-CN1EN2.pdf2012-11-23
Short distance towing with the engine running
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Fig. Propulsion pump
1. Towing valve
2. Bypass valve
Activate the parking brake knob, and temporarily
stop the diesel engine. Chock the drums to
prevent the roller from moving
Activate the parking brake knob, and temporarily
stop the diesel engine. Chock the drums to
prevent the roller from moving
Open the left door to the engine compartment to
access the propulsion pump.
Turn both towing valves (1) (middle hexagonal nuts A)
three turns to the left, while holding the bypass valve
(2) (lower hexagonal nuts). The valves are located at
the bottom of the propulsion pump.
After releasing the hex nut (A), screw in the adjusting
screw (B) until it touches the pin (C) and then turn an
additional ½ turn. The valve is now open.
Figure. Towing valve
To leave the by-pass position, unscrew the adjusting
screw (B) until it stops and then lock the valve again
with the hex nut (A).
Start the engine and allow it to idle.
Deactivate the parking brake knob and place the
forward/reverse lever in the forward or reverse
position. If the lever is in neutral, the brakes in the
hydraulic motors are activated.
The roller can now be towed and can also be steered
if the steering system is otherwise functioning.
Short distance towing when the engine is
inoperative.
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3
Fig. Brake disengagement valve
1. Valve
2. Pump arm
3. Knob
Chock the drums to prevent the roller from moving
when the brakes are hydraulically disengaged.
Chock the drums to prevent the roller from moving
when the brakes are hydraulically disengaged.
Open both towing valves as described earlier.
The brake disengagement pump is located behind the
left door of the engine compartment.
Make sure that the valve (1) is closed, this is done by
tightening clockwise with the knob (3). Pump with the
pump arm (2) until the brakes are disengaged.
Ensure that the valve is reset into open position after
finished towing. This is done by turning the knob
counter clockwise to full extracted position.
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