Multiquip MQ62TDD - Manual (Page 39)

MQ62TDD TRASH PUMP • OPERATION AND PARTS MANUAL — REV. #0 (07/30/09) — PAGE 39
■ Rock the ball to make sure it is tighten to the hitch, and
visually check that the hitch ball nut is solid against the
lock washer and hitch frame.
■ Wipe the inside and outside of the coupler, clean and
inspect it visually for cracks and deformations; feel the
inside of the coupler for worn spots and pits.
■ Be sure the coupler is secured tightly to the tongue of
the trailer. All coupler fasteners must be visibly solid
against the trailer frame.
■ The bottom surface of the coupler to be above the top of
the hitch ball. Use the tongue jackstand to support the
trailer tongue. Wood or concrete blocks may also be used.
Coupling the Trailer to the Tow Vehicle (Ball Coupler)
■ Lubricate the hitch ball and the inside of the coupler with
a thin layer of automotive bearing grease.
■ Slowly back up the tow vehicle so that the hitch ball is
near or aligned under the coupler.
■ Using the jackstand at the front of trailer (tongue), turn
the jackstand crank handle to raise the trailer. If the ball
coupler does not line up with the hitch ball, adjust the
position of the tow vehicle.
■ Open the coupler locking mechanism. Ball couplers have
a locking mechanism with an internal moving piece and
an outside handle. In the open position, the coupler is
able to drop fully onto the hitch ball.
■ Lower the trailer (Figure 28) until the coupler fully
TRAILER SAFETY GUIDELINES
WARNING — Defective Hitch Ball
A worn, cracked or corroded hitch ball can fail while
towing, and may result in death or serious injury.
Before coupling trailer, inspect the hitch ball for wear,
corrosion and cracks.
Replace worn or damaged hitch ball.
WARNING — Uncoupled Hitch Ball
A loose hitchball nut can result in uncoupling, leading
to death or serious injury.
Be sure the hitch ball is tight to the hitch before coupling
the trailer.
engages the hitch ball.
■ Engage the coupler locking mechanism. In the engaged
position, the locking mechanism securely holds the
coupler to the hitch ball.
■ Insert a pin or lock through the hole in the locking
mechanism.
■ Be sure the coupler is all the way on the hitch ball and
the locking mechanism is engaged. A properly engaged
locking mechanism will allow the coupler to raise the
rear of the tow vehicle. Using the trailer jackstand, verify
that you can raise the rear of the tow vehicle by 1-inch
after the coupler is locked to the hitch.
■ Lower the trailer so that its entire tongue weight is held
by the hitch.
■ Raise the jackstand to a height where it will not interfere
with the road.
If the coupler cannot be secured to the hitch ball, do
not tow the trailer. Call your dealer for assistance. Lower
the trailer so that its entire tongue weight is held by the
hitch, and continue retracting the jack to its fully retracted
position.
Overloading can damage the tongue jack.
DO NOT use the tongue jack to raise the
tow vehicle more than 1 inch.
Figure 28. Ball Hitch Coupling Mechanism