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IMPORTANT: READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL
REQUIREMENTS, WARNINGS AND CAUTIONS. USE THE TOOL CORRECTLY AND WITH CARE
FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE
AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP
INSTRUCTIONS SAFE FOR FUTURE USE.
1. Block drive wheels before use. Set parking brake and put gear selector in neutral for manual transmission
or park for automatic transmission. Risk of sudden vehicle movement!
2. Read vehicle's service manual before use.
3. Keep away from hot or moving engine parts.
4. Use with gasoline engines only. Do not exceed gauge range.
5. Secure connections before use.
6. Inspect before every use; do not use if parts loose or damaged.
7. Wear ANSI-approved safety goggles during use.
8. Use the Tester only in well-ventilated areas. A running gasoline engine produces carbon monoxide. Carbon
monoxide is a colorless, odorless, gas that can cause serious injury or death.
9. Maintain labels and nameplates on the Compression Tester. These carry important information. If
unreadable or missing, contact Harbor Freight Tools for a replacement.
10. The brass components of this product contain lead, a chemical known to the State of California to cause
cancer and birth defects (or other reproductive harm). (California Health & Safety Code 25249.5, et seq.)
11. People with pacemakers should consult their physician(s) before using this product. Electromagnetic
fields in close proximity to a heart pacemaker could cause interference or failure of the pacemaker.
In addition, people with pacemakers should adhere to the following: Caution is necessary when near the coil,
spark plug cables, or distributor of a running engine. The engine should always be off if adjustments are to be
made to the distributor.
12. The warnings, precautions, and instructions discussed in this manual cannot cover all possible conditions
and situations that may occur. The operator must understand that common sense and caution are factors,
which cannot be built into this product, but must be supplied by the operator.
1. IMPORTANT SAFETY INFORMATION
2. SPECIFICATION
Pressure Scale
0 <-> 300 PSI / 0 <-> 20 kpa
Air Release Type
Push Button Release
Hose Fitting
M10, M12, M14, M18 (Male, With "O" Ring)