Grizzly H7943/H7944 instruction manual Troubleshooting, Symptom Possible Cause Solution

Page 20

TROUBLESHOOTING

Symptom

Possible Cause

Solution

Air leaking at trig-

1. O-rings in trigger valve hous-

1.

O-rings must be replaced

ger valve area.

 

ing are damaged.

 

& operation of safety nose

 

 

 

 

must be checked.

 

 

 

 

Air leaking between

1. Loose screws in housing.

1.

Tighten screws.

housing and hose.

2. Damaged O-ring.

2.

Replace O-ring.

 

3.

Loose air fitting.

3.

Tighten air fitting & use tef-

 

 

 

 

lon tape.

 

 

 

 

Air leaking between

1. Damaged seal.

1.

Replace damaged seals.

housing and cap

 

 

 

 

assembly.

 

 

 

 

 

 

 

 

Tool skips nails

1. Air leaks.

1.

Tighten screws and fittings.

while discharging.

2. Dirt in nose.

2.

Clean nose.

 

3.

Dirt or damage prevents nails

3.

Clean magazine and

 

 

from moving freely in maga-

 

inspect/repair damage.

 

 

zine.

 

 

 

4.

Inadequate air flow to tool.

4.

Check fitting, hose, com-

 

 

 

 

pressor & air pressure.

 

5.

Worn O-ring on piston or lack

5.

Replace piston O-ring.

 

 

of lubrication.

 

Lubricate.

 

6.

Damaged O-rings on trigger

6.

Replace trigger valve O-

 

 

valve.

 

rings.

 

7.

Worn bumper.

7.

Replace bumper.

 

8.

Cap seal leaking.

8.

Replace cap seal.

 

 

 

 

Tool runs slowly

1. Nailer is not sufficiently lubri-

1.

Lubricate nailer.

or has a loss of

 

cated.

 

 

power.

2. Broken spring in cap assem-

2.

Replace spring.

 

 

bly.

 

 

 

3.

Exhaust port in cap is blocked.

3.

Clean or replace damaged

 

 

 

 

internal parts.

 

 

 

 

Fasteners frequent-

1. Nails are the wrong size.

1.

Use correct nails.

ly jam the nailer.

2. Nails are bent or dirty.

2.

Use undamaged, clean

 

 

 

 

nails.

 

3.

Magazine or nose screws are

3.

Tighten magazine.

 

 

loose.

 

 

 

4.

Driver or driver guide are worn

4.

Replace worn or damaged

 

 

or damaged.

 

parts.

 

5.

Nails are wrong angle.

5.

Use correct angle nails.

 

 

 

 

Nailer does not fire.

1. Nail is jammed in magazine or

1.

Clear nailer magazine or

 

 

discharge area.

 

discharge area.

 

2.

Piston shaft is damaged.

2.

Replace piston shaft.

 

3.

Air pressure too low.

3.

Check/increase air pres-

 

 

 

 

sure.

 

 

 

 

 

-18-

H7943 /H7944 Framing Nailer

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Contents Model H7943/H7944 Before Operating This Equipment SafetySafety Instructions For Pneumatic Tools Always Wear Ansi Approved Hearing Protection Additional Safety Instructions for Nailers Nailer discharges at up to 90 deci Model H7943 Specifications IntroductionForeword Model H7944 Contact InfoSetup UnpackingInventoryCompressed Air System Testing the Safety Nose Mechanism Operations LoadingUnloading Nail Strips Rotating The Exhaust CoverUsing the Nailer To operate your nailerAdjusting Depth Clearing Jammed NailsReplacing Pistons/O-Rings Cleaning & Lubricating CleaningLubricatingH7943 Parts Breakdown H7943 Parts List DescriptionH7944 Parts Breakdown H7944 Parts List Troubleshooting Symptom Possible Cause SolutionWarranty and Returns Page Warranty Card Place Stamp Here