Product Manual
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WORK AREA
• Keep work area clean, free of clutter and well lit. Cluttered and dark work areas can cause
accidents.
• Keep children and bystanders away while operating a tandem wheel chock/lock. Distractions
can cause you to lose control, so visitors should remain at a safe distance from the work area.
PERSONAL SAFETY
• Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair,
clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught.
• Use safety apparel and equipment. Use safety goggles or safety glasses with side shields
which comply with current national standards, or when needed, a face shield.
TANDEM WHEEL CHOCK/LOCK USE AND CARE
• For optimal stability the tandem wheel chock/lock should be used on both sides of
vehicle/trailer.
• Do not modify the tandem wheel chock/lock in any way. Unauthorized modification may
impair the function and/or safety and could affect the life of the equipment. There are specific
applications for which the tandem wheel chock/lock was designed.
• Always check for damaged or worn out parts before using the tandem wheel chock/lock.
Broken parts will affect the tandem wheel chock/lock operation. Replace or repair damaged or
worn parts immediately.
• Use the tandem wheel chock/lock on flat and level surfaces only. A load on a slanted or
uneven surface can result in loss of control.
• Storing tandem wheel chock/lock. When tandem wheel chock/lock is not in use, store it in a
secure place out of the reach of children. Inspect it for good working condition prior to storage
and before re-use.
• Do not over tighten this wheel chock/lock. Damage can be done to tires or Tandem Wheel
chock/lock. This damage is not covered by the warranty.
• NEVER rely on this tandem wheel chock/lock as a brake. While it will assist in braking, other
independent devices such as blocks or wedges must be used to keep the vehicle in the parked
position.
OPERATION
NOTE: You may need to repeat adjustment steps several times to find final fit for your
trailer/vehicle.
The original state of the unit is at the narrowest position and will not function until adjustments
are made. REFER TO FIGURE #1 and #2 BELOW while following instructions below.
Figure #1
Handle in “open” position
Figure #2
Handle in “closed” position
Adjusting Nut and
Threaded Rod.
Make adjustments
in “open” position