Harbor Freight Tools 40115 operating instructions Troubleshooting Guide

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Anytime any maintenance or repairs are done, FIRST:

1.Disconnect the Nailer/Stapler from the air hose.

2.Empty Magazine A (61) completely.

3.Attempt to fire the Nailer/Stapler into a piece of scrap wood to ensure that it is disconnected and is incapable of firing any staples.

4.Always leave Magazine A (61) open during maintenance. The Magazine is spring- loaded and may cause parts or a fastener to fly out of the Nailer/Stapler.

Troubleshooting Guide

Stop using the Nailer/Stapler immediately if any of the following problems occur.

Repairs and part replacements must be done only by a qualified technician.

All procedures in bold on this chart are to be attempted only be a qualified technician.

Problem

Likely Cause

Solution

 

 

 

Air leaking at Trigger area.

O-Rings in Valve Body (33) are

Replace O-Rings and check contact

damaged.

trip operation.

 

 

 

 

Air leaking between Housing and Nose.

Loose screws in Housing.

Tighten screws.

Damaged O-Rings/Bumper (24).

Replace O-Rings or Bumper (24).

 

 

 

 

Air leaking between Housing and Cap (4).

Loose screws.

Tighten Screws.

Damaged Gasket (9).

Replace Gasket (9).

 

 

 

 

Insufficient oil.

Lubricate as instructed.

Runs slowly or has power loss.

Broken Spring in Cylinder Cap (4).

Replace Compression Spring (8).

Exhaust is blocked.

Clean Cap (4) or replace damaged

 

 

 

parts.

 

 

 

 

Worn Bumper (24) or damaged

Replace Bumper (24) or Pusher

 

Pusher Spring.

Spring.

 

Dirt in Driver Guide (52).

Clean channels in Driver Guide (52).

Tool skips a nail.

Inadequate airflow to Nailer/Stapler.

Check hose and compressor fittings.

 

Worn or dry O-Ring on Piston.

Replace or lubricate O-Rings.

 

Damaged O-Ring on Trigger Valve.

Replace O-Rings.

 

Cap Gasket (9) leaking.

Replace Gasket (9).

 

 

 

 

Guide on driver is worn.

Replace Guide.

Fasteners are jammed.

Fasteners are wrong size or damaged.

Use correct, undamaged Fasteners.

 

Magazine or Nose screws are loose.

Tighten screws.

 

Driver (19) is damaged.

Replace Driver (19).

 

 

 

 

Rounded Driver (19) slipping off

Replace Driver (19).

 

fastener crown.

 

Nailer/Stapler will not drive down tight.

Lack of air pressure.

Supply correct pressure (60-100 PSI).

 

Slow cycling and loss of power.

Check Compression Spring (8) for

 

 

broken coils or reduced length.

 

 

Make sure Exhaust is clear.

 

 

 

Blade driving fastener too deeply.

Worn Bumper (24) and/or Piston

Replace either or both parts.

Spacer.

 

 

 

 

 

 

All procedures in bold on this chart are to be attempted only be a qualified technician.

SKU 40115

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

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Contents AIR NAILER/STAPLER Save This Manual SpecificationsSafety Warnings and Precautions SKU For technical questions, please call SKU For technical questions, please call Operation Testing The Single Sequential SafetyTrip MechanismUnpacking Loading Nails or Staples Operating the Stapler/NailerClearing Jams See FigureTroubleshooting Guide Anytime any maintenance or repairs are done, FirstMaintenance Parts ListAssembly Drawing