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MODEL H7943/H7944
INSTRUCTION MANUAL
H7943 21°
FRAMING NAILER
H7944 34°
FRAMING NAILER
COPYRIGHT © NOVEMBER, 2006 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#JC8620 PRINTED IN TAIWAN
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SAFETY For Your Own Safety Read Instruction Manual Before Operating This Equipment The purpose of safety symbols is to attract your attention to possible hazard- ous conditions. This manual uses a series of symbols and signal words which are intended to convey the level of importance of the safety messages. The progression of symbols is described below. Remember that safety messages by themselves do not eliminate danger and are not a substitute for proper accident prevention measures. Indic
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Safety Instructions For Pneumatic Tools 10. USE PROPER AIR HOSE for the 17. DISCONNECT TOOLS before ser- tool. Make sure your air hose is in vicing, changing accessories, or good condition and is long enough to moving to another location. reach your work without stretching. 18. DO NOT OVERREACH. Keep proper footing and balance at all 11. WEAR PROPER APPAREL. Do not times. wear loose clothing, gloves, neck- ties, rings, bracelets, or other jew- 19. USE THE RECOMMENDED elry which may get cau
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Additional Safety Instructions for Nailers 1. HAND INJURIES: Do not place 5. COMPRESSED AIR RATING: Do your hands near the nail point not connect the nailer to compressed of entry. A nail can deflect and air that exceeds 120 PSI. tear through the surface of the workpiece, puncturing your hand 6. CHECK VALVE: Do not use a check or fingers. valve or any other fitting that allows air to remain in the tool. 2. COMBUSTIBLE GASES: Never connect the nailer to pressur- 7. CLEANING: Never use g
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Never point this nailer at yourself or another person! Always pay attention to the direction this nailer is pointed. Use this tool with respect and caution to lessen the possibility of operator or bystander injury. Ignoring this warning may result in serious personal injury. Operating this nailer can propel objects into the air, causing imme- Nailer accidents routinely happen while moving the gun to another loca- diate eye damage. To protect your- tion, such as up ladders, to another se
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INTRODUCTION Foreword Model H7944 Specifications We are proud to offer the Grizzly Model H7943/H7944 framing nailer. This nailer Nail Type ...............................Clipped Head is part of a growing Grizzly family of fine Nail Angle ..............................................34° pneumatic tools. When used according to Nail Diameter .......................0.113" - 0.161" the guidelines set forth in this manual, you Nail Length .........................................2"–4" can expe
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SETUP Unpacking Inventory Your Model H7943/H7944 left our ware- After you open the nailer box, you should house in a carefully packed box. If you dis- find the following. cover the nailer is damaged after you have signed for delivery, please immediately Model H7943/H7944 Inventory (Figure 1) call Customer Service at (570) 546-9663 A. Nailer .................................................. 1 for advice. B. Nailer Case ........................................ 1 C. Extra Piston O-Rings ...
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Check the current Grizzly catalog for avail- Compressed Air ability of this unit. If you plan on install- System ing a filter/lubricator/regulator unit in your compressed air system, always follow the connection instructions that come with Model H7943/H7944 is designed to be the unit. operated at 70–120 PSI using clean, dry, regulated, compressed air. DO NOT exceed the 120 PSI maximum operat- ing pressure for your model. Exceeding the maximum permissible operating pressure may damage the
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5. Without pressing the trigger, depress Testing the Safety the safety nose mechanism against a Nose Mechanism scrap piece of wood that is clean and free of any knots, nails, or other foreign objects. A safety mechanism (bump fire) on the nose of the nailer protects against acci- — If the nailer does not fire then the dental firing. When the trigger is pressed, safety nose mechanism is working the nailer will not fire until the safety nose correctly. mechanism is depressed. — If the na
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OPERATIONS Loading Use nails meeting these specifications: Model H7943 Nail Type: Round Head Strip Angle: 21º Nail Diameter: 0.113" - 0.161" Nail Length: 2"– 4" Magazine Capacity: 66 nails. Figure 3. Loading nails in the magazine. Model H7944 3. Pull the pusher to the rear of the maga- Nail Type: Clipped Head zine, as shown in Figure 4. Strip Angle: 34º Nail Diameter: 0.113" - 0.148" Nail Length: 2"– 4" Magazine Capacity: 90 nails. To load nails in your nailer: 1. DISCONNECT NAILER FROM THE
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Unloading Nail Strips Rotating The Exhaust Cover To remove unused nails: The exhaust cover rotates as needed to 1. DISCONNECT NAILER FROM THE direct the exhaust away from you. AIR SUPPLY! To rotate the exhaust cover, do these 2. Point the nailer away from you. steps: 3. Pull the pusher back from the nails, 1. Use the 5MM hex wrench to loosen the then press the pusher lock down as exhaust cover cap screw as shown in shown in Figure 6. Figure 8. Exhaust Pusher Lock Cap Screw Figure 8. Lo
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To operate your nailer: Using the Nailer 1. Connect the air supply to the quick connect fitting. If you have not read the safety instruc- tions in this manual, do not operate 2. To test for proper nail penetration, hold the nailer. the nailer perpendicular to the surface of a piece of clean scrap wood that is When using pneumatic nailers, be aware thick enough for the length of nails you of the causes and dangers of nail deflec- have loaded. tion. 3. Depress the safety nose mech
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Adjusting Depth Clearing Jammed Nails A depth adjustment device is attached to the nose for setting the nail depth. A jammed nail must be cleared before using the nailer again. To adjust the depth: To clear a jammed nail from the dis- 1. DISCONNECT NAILER FROM THE charge area: AIR SUPPLY AND POINT THE NAILER IN A SAFE DIRECTION! 1. DISCONNECT NAILER FROM THE AIR SUPPLY! 2. Use a hex wrench to loosen the cap screw on the depth adjustment device 2. Remove all nails from the magazine. (
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4. The top of the piston should now be Replacing visible inside the cylinder, which is Pistons/O-Rings housed in the head of the nailer. 5. Watch the discharge area and push If you need to replace piston parts in your the top of the piston with your finger. nailer, you can purchase a piston repair kit You will see the piston shaft slide from Grizzly. down the discharge area. The Piston Repair Kit part number for 6. With a long flathead screwdriver or Model H7943 is PH7943087. The Pi
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CLEANING & LUBRICATING Cleaning Lubricating Use an automotive grade solvent such as Special pneumatic tool oil has been ® Sprayway C-60 (G2544 in the Grizzly included with your new Grizzly nailer to catalog) to clean the nose assembly of the help maintain its useful life. Place two to nailer. Always be sure that the nailer is dry six drops of oil in the nailer air inlet (as before using it again. shown in Figure 12) every 2 hours of continuous use. Do not allow dust, chips, sand, etc. int
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H7943 PARTS BREAKDOWN �� � �� � �� �� � �� � �� �� �� � �� �� � �� �� �� �� �� � �� �� �� �� � �� �� �� �� �� � �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ������������������������������������������������������������ �������������������������������������������������� -14- H7943 /H7944 Framing Nailer
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H7943 PARTS LIST REFPART # DESCRIPTION REFPART # DESCRIPTION 1 FLAT HD SCR M6-1 X 16 45 PH7943045 NAIL GUN LINER PFH38M 2 PH7943002 FRONT BRACKET 46 PH7943046 MAGAZINE 3 PH7943003 EXHAUST COVER 47 PH7943047 NAIL STOPPER 4 PH7943004 EXHAUST FILTER 48 PSBS09M BUTTON HD CAP SCR M6-1 X 12 5 PH7943005 EXHAUST FILTER PLATE 49 PH7943049 MAGAZINE COVER 6 PSB06M CAP SCREW M6-1 X 25 51 PLNO3M LOCK NUT M6-1 7 PH7943007 CAP 52 PSBS21 BUTTON HD CAP SCR M6-1 X 25 8 PH7943008 SPRING 53 PW02M FLAT WASHER 5MM
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H7944 PARTS BREAKDOWN �� �� � �� � �� � �� � �� �� �� �� � �� � �� �� �� �� �� � �� �� �� �� �� �� � �� �� �� �� �� � �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ������������������������������������������������������������� �������������������������������������������������� -16- H7943 /H7944 Framing Nailer
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H7944 PARTS LIST REF PART # DESCRIPTION REF PART # DESCRIPTION 1 PFH38M FLAT HD SCR M6-1 X 16 45 PH7944045 NAIL GUN LINER 2 PH7943002 FRONT BRACKET 46 PH7944046 MAGAZINE 3 PH7943003 EXHAUST COVER 47 PH7943047 NAIL STOPPER 4 PH7943004 EXHAUST FILTER 48 PSBS09M BUTTON HD CAP SCR M6-1 X 12 5 PH7943005 EXHAUST FILTER PLATE 49 PH7943049 MAGAZINE COVER 6 PSB06M CAP SCREW M6-1 X 25 50 PH7944050 SET PLATE 7 PH7943007 CAP 51 PLN03M LOCK NUT M6-1 8 PH7943008 SPRING 52 PH7944052 BRACKET 9 PH7943009 O-RING
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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
