Pneumatic Ratchet Wrench #505320, JAT-320 #505321, JAT-321 Operation & Parts Manual M-505320 Edition 1 02/2015 JET 427 New Sanford Road LaVergne, TN 37086 Ph.: 800-274-6848 www.jettools.
Warranty and Service JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday. Warranty Period The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded website. • JET products carry a limited warranty which varies in duration based upon the product.
Safety warnings General air tool warnings 1. Read and understand this entire manual before attempting assembly or operation. 2. Read and understand all warnings posted on the tool and in this manual. Failure to comply with all of these warnings may cause serious injury. 3. Replace warning labels if they become obscured or removed. 4. Do not use this tool for other than its intended use.
20. Do not use power tools in damp or wet location, or expose them to rain. Keep work area well lighted. 21. Do not leave a connected tool unattended. When not in use, disconnect tool from air source. 22. Shut off air supply and discharge any residual pressure from tool before removing hose, making adjustments, changing accessories, or storing tool. 23. Make sure tool is switched off, and your finger off the trigger, before connecting to air supply. 24.
About this manual This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JAT-320 and JAT-321 Pneumatic Ratchet Wrench. This manual contains instructions on safety precautions, general operating procedures, maintenance procedures and parts breakdown. Your tool has been designed and constructed to provide consistent, long-term operation if used in accordance with the instructions set forth in this document.
Tool specifications Model number JAT-320 JAT-321 Stock number 505320 505321 Square drive 1/4 in. 3/8 in. Bolt capacity 5/16 in. 5/16 in. Anvil retainer type Hog ring Ball detent Impact mechanism Single hammer Single hammer Maximum torque 50 lbf•ft (67.8 N•m) 50 lbf•ft (67.8 N•m) Working torque 10-35 lbf•ft (13.6-47.5 N•m) 10-35 lbf•ft (13.6-47.5 N•m) Free speed 700 RPM 700 RPM Average air consumption 3.1 CFM 3.1 CFM Air inlet 1/4 in. NPT 1/4 in.
Setup and Assembly 5. Turn direction switch to forward (F) or reverse (R) rotation. Any missing parts or damage should be reported immediately to your JET® distributor. Do not use a damaged tool. Read this instruction manual thoroughly for operation, maintenance and safety instructions. To loosen nut or bolt: Box contents: 1. Select reverse rotation. 1 1 1 2. Place socket over nut, and grip tool firmly with both hands. 3. Gently squeeze throttle lever.
Maintenance 4. Drain water from air compressor tank daily, as well as any condensation from air lines. Water in the air line may enter the tool and cause damage. 5. Change filters on the air system on a regular basis. 6. Air-line pressure may be increased accordingly to compensate for extra-long air hoses (usually over 25 feet). Inside diameter of hose should be minimum 3/8-inch. Lubrication The ratchet wrench should be lubricated daily (or before each use) with air tool oil through the air inlet.
When using multiple hoses, air hoses should be larger than leader hose. Join multiple hoses directly, rather than with quick connect fittings which may cause pressure drops and tool power reduction. Use anti-whip devices across hose couplings to prevent hose from whipping in the event of a hose failure or coupling disconnect. Always use moisture traps at the compressor for the main distribution line. Use moisture traps and in-line oilers on each downline that is to be used for air tools. (See Figure 2).
Troubleshooting JAT-320/321 Ratchet Wrenches Any disassembly of the tool should be done by qualified service personnel. For problems not addressed below, contact JET technical service at 800-274-6846. Problem Possible cause Remedy Tool will not start. Air valve closed or obstructed. Open valve; clear any obstructions. Dirt or gum deposits on components. Flush tool with gum solvent. If problem persists, disassemble, clean and lubricate internal parts. Rotor vanes or other components are worn.
Replacement parts Service parts are listed on the following pages. To order parts or reach our service department, call 1-800274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Please have the stock number and serial number of your tool available when you call, so that we may serve you quickly and accurately.
#505320, JAT-320, 1/4-inch Ratchet Wrench – exploded view 4 2 3 2 6 2 2 2 0 3 7 2 5 3 8 4 1 5 2 3 3 3 5 1 6 1 9 4 0 5 4 3 9 1 7 1 7 3 0 2 8 3 1 2 8 1 4 1 4 6 4 1 3 4 2 4 3 4 1 0 4 5 3 5 2 5 8 0 3 6 5 4 0 0 0 0 56 5 7 55 4 4 2 0 0 1 7 0 9 0 JAT-320,321 Ratchet Wrenches 12
#505320, JAT-320, 1/4-inch Ratchet Wrench – parts list Index 1 2 3 4 Part No. JAT320-01 JAT320-02 JAT320-03 JAT320-04 5 JAT320-05 6 7 8 9 10 14 15 16 17 18 19 20 21 22 23 24 26 27 JAT320-06 JAT320-07 JAT320-08 JAT320-09 JAT320-10 JAT320-14 BB-696ZZ JAT320-16 JAT320-17 JAT320-18 JAT320-19 JAT320-20 BB-608ZZ JAT320-22 JAT320-23 JAT320-24 JAT320-26 BB-6901ZZ Description Air inlet Motor housing Throttle valve Spring O-Ring P8 NBR A70±5 ø7.8x1.9 Valve screw Pin ø4x14.
#505321, JAT-321, 3/8-inch Ratchet Wrench – exploded view 4 2 3 2 2 2 8 4 1 5 6 2 5 1 6 1 9 4 0 5 7 2 0 3 5 3 9 1 7 1 2 3 3 3 4 1 7 3 4 6 4 3 1 4 2 4 3 4 1 2 8 1 0 2 4 3 1 0 4 5 3 5 8 3 2 5 8 0 2 0 3 6 5 4 0 0 0 0 5 7 4 4 0 1 7 0 9 0 JAT-320,321 Ratchet Wrenches 14
#505321, JAT-321, 3/8-inch Ratchet Wrench – parts list Index 1 2 3 4 Part No. JAT320-01 JAT320-02 JAT320-03 JAT320-04 5 JAT320-05 6 7 8 9 10 14 15 16 17 18 19 20 21 22 23 24 26 27 JAT320-06 JAT320-07 JAT320-08 JAT320-09 JAT320-10 JAT320-14 BB-696ZZ JAT320-16 JAT320-17 JAT320-18 JAT320-19 JAT320-20 BB-608ZZ JAT320-22 JAT320-23 JAT320-24 JAT320-26 BB-6901ZZ Description Air inlet Motor housing Throttle valve Spring O-Ring P8 NBR A70±5 ø7.8x1.9 Valve screw Pin ø4x14.
427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
