Harbor Freight Tools 42528 manual Troubleshooting Guide

Anytime any maintenance or repairs are done, FIRST:

1.Disconnect the Nailer from the air hose.

2.Empty the Magazine Unit (3-2) completely.

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

4.Always leave the Magazine Side Cover (3-1) open during maintenance. The Magazine is spring-loaded and may cause parts or a nail to fly out of the Nailer.

Troubleshooting Guide

Stop using the Brad Nailer 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 Trigger Valve housing	Replace O-Rings and check contact
	are damaged.	trip operation.
Air leaking between Housing and Nose.	Loose screws in Housing.	Tighten screws.
	Damaged O-Rings/Bumper (A-05).	Replace O-Rings or Bumper (A-05).
Air leaking at Trigger Valve Stem.	O-Rings or Seals are damaged.	Replace O-Rings or Seals.
Air leaking between Housing and Cap.	Loose screws.	Tighten Screws.
	Damaged Seal (A-12).	Replace Seal (A-12).
	Insufficient oil.	Lubricate as instructed.
Runs slowly or has power loss.	Broken Spring in Cylinder Cap.	Replace Spring (A-13).
	Exhaust in Cap (A-14) is blocked.	Replace damaged parts.
	Worn Bumper (A-05) or damaged	Replace Bumper (A-05) or Pusher
	Pusher Spring.	Spring.
	Dirt in Driver Guide (3-9).	Clean channels in Driver Guide (3-9).
Nailer skips a nail.	Inadequate airflow to Nailer.	Check hose and compressor fittings.
	Worn or dry O-Ring on Piston.	Replace or lubricate O-Rings.
	Damaged O-Ring on Trigger	Replace O-Rings.
	Valve.	Replace Seal (A-12).
	Cap Seal (A-12) leaking.
	Guide on driver is worn.	Replace Guide.
Nails are jammed.	Nails are wrong size or damaged.	Use correct, undamaged nails.
	Magazine or Nose screws are	Tighten screws.
	loose.	Replace Driver Blade (3-18).
	Driver Blade (3-18) is damaged.
	Rounded Driver Blade (3-18)	Replace Driver Blade (3-18).
	slipping off nail crown.
Nailer will not drive down tight.	Lack of air pressure.	Supply correct pressure (55-95 PSI).
	Slow cycling and loss of power.	Check Spring (A-13) for broken coils
		or reduced length. Make sure
		exhaust in Cap (A-14) is clear.
Blade driving nail too deeply.	Worn Bumper (A-05) 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 42528 For technical questions, please call 1-800-444-3353. Page 8