Finish Thompson CQC-HD - Manual (Page 9)

USE OF THE DRAIN PUMP:
CAUTION:
The CQC-HD has a high center of gravity and could tip over. Use caution when moving the CQC-
HD with the fill container full.
WARNING:
Large vehicle cooling systems can be under pressure and extremely hot. Allow the vehicle’s
cooling system to cool down and use extreme caution when removing caps and hoses. Consult
the vehicle manufacturer for recommended procedure on removing the radiator cap.
1. Squeeze the vehicle’s upper radiator hose to determine the amount of pressure in the system. If the
hose is hot and hard, allow the cooling system to cool down before proceeding.
2. Carefully remove the cap of the vehicle’s overflow bottle. In many cooling systems there is one cap
for both the radiator and the overflow container. Using a clamp or locking pliers, carefully pinch the
flexible overflow tube closed to prevent fluid leakage during coolant exchange.
3. Insert the plastic wand on the red suction hose into the overflow bottle. Turn on the CQC-HD
drain pump (the switch is located on the front right side of the unit) and remove the liquid from the
overflow container. Turn off the drain pump and replace the cap to the overflow bottle.
Hint: If the overflow bottle contains sludge, loosen it with water sprayed with
a hose.
4. Remove the vehicle’s radiator cap. Insert the plastic wand from the red
suction hose into the radiator (see figure 2). Turn on the CQC-HD drain pump
(the switch that is located on the right-front side of the unit) and remove liquid
from the radiator until the level is below the upper radiator hose. Turn off the
drain pump. Replace the radiator cap.
Note: If the radiator has no cap, locate the radiator drain. Open the drain valve
and collect liquid from the radiator in a drain receptacle until the level is below
the upper radiator hose and level of the thermostat. You may be able to utilize
the red evacuation pump/wand to assist in the drain process. Place the plastic wand on the end of the
petcock valve. Turn the petcock drain valve and the evacuation pump on. After completion of this
step, close the radiator drain valve.
CAUTION:
Do not remove too much liquid from the radiator. Allowing air to enter the lower radiator hose
can result in damage to the vehicle’s engine.
CAUTION:
Never allow the CQC-HD pumps to operate without liquid. Running the pumps dry will cause
premature wear or damage to the pump and is not covered under warranty.
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7.
Figure 2