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DRY PRIME PUMP — OPERATION AND PARTS MANUAL — REV. #3 (10/06/08) — PAGE 43
Uncoupling the Ball Hitch
Follow these steps to uncouple ball hitch from tow vehicle:
Block trailer tires to prevent the trailer from rolling,before
jacking the trailer up.
Disconnect the electrical connector.
Disconnect the breakaway brake switch cable. Promptly
replace the pullpin in the switchbox.
Before extending jackstand, make certain the ground
surface below the jackstand foot will support the tongue
load.
Rotate the jackstand handle (or crank) clockwise. This
will slowly extend the jack and transfer the weightof the
trailer tongue to the jack.
DO NOT tow the trailer with the
breakaway brake system ON be-
cause the brakes will overheat
which can result in permanent
brake failure.
Failure to replace the pullpin will prevent brakes from
working, leading to loss of control, serious injury or death.
Replace the breakaway brake bat-
tery (if equipped) according to the
battery at intervals specified by
manufacturer.
WARNING - Pullpin Replacement
NOTE
NOTE
Connecting Trailer Lights
Connect the trailer lights to the tow vehicle’s electrical
system using the electric connectors at the front of the trailer
(tongue). Reference the wiring diagram shown in the trailer
wiring diagram section of this manual. Before towing the
trailer check for the following:
Running lights (turn on tow vehicle headlights).
Brake Lights (step on tow vehicle brake pedal).
Backup Lights (place tow vehicle gear shift in reverse).
Turn Signals (activate tow vehicle directional signal le-
ver).
Electric Brake Testing
Perform the following when testing the electric braking sys-
tem:
Connect the pull pin cable to the tow vehicle so that the
pull pin will be pulled out before all of the slack in the
safety chains is taken up (see Figure 30). DO NOT
connect the pullpin cable to a safety chain or to the
hitch ball or hitch ball assembly. This would keep the
breakaway brake system from operating when it is
needed.
When electric brakes are used, the tow vehicle will have
an electric brake controller that sends power to the trailer
brakes. Before towing the trailer on the road, you must
operate the brake controller while trying to pull the trailer
in order to confirm that the electric brakes operate. Re-
move the pullpin from the switch. While towing the trailer
at less than 5 m.p.h., manually operate the electric brake
controller in the tow vehicle cab.
You should feel the trailer resisting being towed, but the
wheels will not necessarily be locked. If the brakes do
not function, DO NOT tow the trailer until brakes are
repaired.
Immediately replace the pullpin. The breakaway brake
system battery discharges rapidly when the pullpin is
removed.
Improper electrical connection between the tow vehicle
and the trailer will result in inoperable lights and electric
brakes, and can lead to collision.
Before each tow:
y Check that the taillights, brake lights and turn signals
work
y Check that the electric brakes work by operating the
brake controller inside the tow vehicle.
WARNING - Improper Electrical Connections
TRAILER SAFETY GUIDELINES