Troubleshooting

Problem

 

Possible Causes

 

Likely Solutions

Decreased output.

1. Not enough air pressure and/

1.

Check for loose connections and make sure

 

 

or air flow.

 

that air supply is providing enough air flow

 

 

 

 

(CFM) at required pressure (PSI) to the tool’s

 

 

 

 

air inlet. Do not exceed 90 PSI maximum

 

 

 

 

air pressure.

 

2.

Obstructed trigger.

2.

Clean around trigger to ensure free

 

 

 

 

movement.

 

3.

Incorrect lubrication or not

3.

Lubricate using air tool oil and grease

 

 

enough lubrication.

 

according to directions.

 

4.

Blocked air inlet screen (if

4.

Clean air inlet screen of buildup.

 

 

equipped).

 

 

 

5.

Air leaking from loose housing,

5.

Make sure housing is properly assembled

 

 

hose or connections.

 

and tight. Repair hose/connection air leaks.

 

6.

Mechanism contaminated.

6.

Have qualified technician clean and lubricate

 

 

 

 

mechanism. Install in-line filter in air supply

 

 

 

 

as stated in Initial Set Up: Air Supply.

 

7.

Vane wear or damage.

7.

Replace all vanes.

Housing heats

1.

Incorrect lubrication or not

1.

Lubricate using air tool oil and grease

during use.

 

enough lubrication.

 

according to directions.

 

2.

Worn parts.

2.

Have qualified technician inspect internal

 

 

 

 

mechanism and replace parts as needed.

Severe air

1. Cross-threaded housing

1.

Check for incorrect alignment and uneven

leakage.

 

components.

 

gaps. If cross-threaded, disassemble and

 

 

 

 

replace damaged parts before use.

 

2.

Loose housing.

2.

Tighten housing assembly. If housing cannot

 

 

 

 

tighten properly, internal parts may be

 

 

 

 

misaligned.

 

3.

Damaged valve or housing.

3.

Replace damaged components.

 

4.

Dirty, worn or damaged valve.

4.

Clean or replace valve assembly.

Follow all safety precautions whenever diagnosing or servicing the tool.

Disconnect air supply before service.

SKU 68128

For technical questions, please call 1-800-444-3353.

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Harbor Freight Tools 68128 operating instructions Troubleshooting, Problem Possible Causes Likely Solutions