3-IN-1 AIR FRAMING NAILER 98751 SET UP AND OPERATING INSTRUCTIONS Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury. SAVE THIS MANUAL. Copyright© 2008 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally.
Safety Alert Symbol and Signal Words In this manual, on the labeling, and all other information provided with this product: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
medication. A moment of inattention while operating the tool increases the risk of injury to persons. b. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair increases the risk of injury to persons as a result of being caught in moving parts. c. Avoid unintentional starting. Be sure the switch is off before connecting to the air supply.
f. Hold tool away from head and body during use. Tool may kick back, causing injury. g. Do not fire fasteners too close to edge of workpiece. They may split the workpiece and fly free, causing personal injury. h. Carry tool safely. Carry tool by handle. i. Use clamps or another practical way to secure and support the workpiece to a stable platform. Holding the work by hand or against the body is unstable and is able to lead to loss of control. j. k. Do not force the tool.
gas as an air source for the tool. Such gases are capable of explosion and serious injury to persons. Specific Safety Instructions 1. The warnings and precautions discussed in this manual cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied by the operator. 2.
4. WARNING: The brass components of this product contain lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. (California Health & Safety Code § 25249.5, et seq.) 5. Only use with accessories rated to handle forces exerted by tool during operation. Other accessories not designed for the forces generated may break and forcefully launch pieces. 6. 7. 8. 9. Attach all accessories properly to the tool before connecting the air supply.
Functional Description 1. Specifications Air Pressure Range 70-120 PSI Maximum Air Pressure 120 PSI Air Inlet 1/4” -18 NPT Nail Type / Length Magazine Capacity .113”-.
Item 98751 A B C D E F G H Air Hose Filter Regulator Lubricator (optional) Coupler and Plug Leader Hose (optional) Air Cleaner / Dryer (optional) Air Adjusting Valve (optional) Description Non-lubricated Tools A Lubricated Tools B B G D C A Function A E E F H Connects air to tool Prevents dirt and condensation from damaging tool or work piece Adjusts air pressure to tool For air tool lubrication Provides each connections Increases coupler life Prevents water vapor from damaging work piece
B A A B C D E F G H I J K L M N O Item 98751 Description F E F Vibration Pads Anchor Bolts Ball Valve Isolation Hose Main Air Line - 3/4” minimum recommended Ball Valve Branch Air Line -1/2” minimum recommended Filter Air Cleaner / Dryer (optional) Regulator Lubricator Air Hose Coupler and Plug Air Adjusting Valve Leader Hose B A C D G I I J K N J H Function H L L M O For noise and vibration reduction Secures air compressor in place Isolates sections of system for maintenance For vibra
3. The air hose must be long enough to reach the work area with enough extra length to allow free movement while working. 4. Close the in-line safety valve between the compressor and the tool. 5. 6. 7. Inspect tool before use, looking for damaged, loose, and missing parts. If any problems are found, do not use tool until repaired.
press it against the workpiece again. The tool must not cycle (fire). If it fails to perform in the manner explained in bold, have it repaired by a qualified service technician. Air Coupler (95) Trigger (59) WARNING! Disconnect the Nailer from the air compressor whenever loading or servicing. Magazine (79) Figure 1 Safety Nosepiece (42) 3. The Nailer should not fire if Safety Nosepiece (42) is not depressed against the workpiece. 4.
Operating Nailer Adjuster Knob (85) Set proper angle of the Nailer for your application (a three step process): Failure to properly adjust the nailer can result in tool failure or damage. Angle Adjustment Holes Figure 4 2. Hex Bolt 21o 28o 34o Remove the Adjuster Knob (85). See Figure 4, above. Tab (75) 34o 28o 21o Figure 3 1. Pull back and engage the Tab (75), exposing three adjustment holes. Loosen the hex bolt and slide it into the appropriate hole (21°, 28°, 34°).
or 34° angle nails, the Pin should be in the upper hole (position B). If the Pin is in the wrong position, pull the Pin from its Washer (35), reposition the Bar Guide (36), and reinsert and secure the Pin and Washer. Before using Nailer, be sure Pin is properly secured. 5. 6. The driving depth of a nail can be adjusted in two ways. First, by increasing or decreasing air pressure (never to exceed the maximum of 120 PSI). Secondly, by loosening the Depth Screw (41) and adjusting the Bracket A (40).
WARNING! Anytime any maintenance or repairs are done, wear ANSI-approved impact safety goggles and appropriate hearing protection. THEN: User-Maintenance Procedures not specifically explained in this manual must be performed only by a qualified technician. a. Disconnect the Nailer from its air supply.
Troubleshooting Problem Possible Causes Likely Solutions 1. Loose Screw (6). 1. Tighten and recheck. Air leaking in Cylinder Cap (8). 2. Gasket (9) is cracked or worn. 2. Replace Gasket. 1. Tool is too dry. 1. Add about 3 drops of pneumatic tool oil into the Air Coupler (95). Lack of power. Slow to cycle. 2. Air pressure too low. 2. Check to make sure regulator on Low power when shooting and air compressor is set between returning. 70 PSI and 120 PSI. 3. Exhaust blocked. 3. Clean exhaust channel. 1.
Parts List Part 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Item 98751 Description Screw Spring Washer Bushing Exhaust Cover Seal Screw Spring Washer Cylinder Cap Gasket Washer Valve Seat Spring O-ring 57.5x2.6 O-ring 72.4x3.5 Valve Screw Cylinder Seal Collar O-ring 54.4x4 Driver Cylinder O-ring 67x3 O-ring 60.25x2.5 Restrictive Seal O-ring 97.5x3.5 Bumper A Bumper B Body O-ring 62.3x1.
Parts Diagram Item 98751 For technical questions, please call 1-888-866-5797.
Limited 90 Day Warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase.