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Operating Instructions and Parts Manual 

3/8-inch Reversible Air Drill 

Models JNS-4031 and JNS-4031KL 
 

 

 

 

 

WMH TOOL GROUP 

2420 Vantage Drive 
Elgin, Illinois 60123 

Part No. M-JNS4031 

Ph.: 800-274-6848 

Revision A

  

6/06 

www.wmhtoolgroup.com 

Copyright © WMH Tool Group 

Summary of Contents for JNS-4031

Page 1: ...d Parts Manual 3 8 inch Reversible Air Drill Models JNS 4031 and JNS 4031KL WMH TOOL GROUP 2420 Vantage Drive Elgin Illinois 60123 Part No M JNS4031 Ph 800 274 6848 Revision A 6 06 www wmhtoolgroup com Copyright WMH Tool Group ...

Page 2: ...postage prepaid to a location designated by us For the name of the location nearest you please call 1 800 274 6848 You must provide proof of initial purchase date and an explanation of the complaint must accompany the merchandise If our inspection discloses a defect we will repair or replace the product or refund the purchase price at our option We will return the repaired product or replacement a...

Page 3: ...mium from chemically treated lumber Your risk of exposure varies depending on how often you do this type of work To reduce your exposure to these chemicals work in a well ventilated area and work with approved safety equipment such as face or dust masks that are specifically designed to filter out microscopic particles 10 Do not operate this tool while tired or under the influence of drugs alcohol...

Page 4: ...cations Stock Number JNS 4031 JNS 4031KL Drilling Cap in 3 8 3 8 Free Speed no load RPM 1800 1800 Required Air Pressure PSI 90 90 Average Air Consumption CFM 6 6 Air Inlet Diameter in 1 4 NPT 1 4 NPT Air Hose Inside Diameter in 3 8 3 8 Vibration Value m s 2 according to EN12096 x 10 y 0 5 z 0 7 Overall Length in 8 07 8 07 Net Weight lbs 2 76 2 76 The above specifications were current at the time t...

Page 5: ...nually proceed as follows 1 Disconnect the air hose from the drill 2 Place 4 or 5 drops of air tool oil into the air inlet Figure 1 NOTE Air tool oil not provided It may be purchased from your JET dealer or is available at most major hardware and tool stores SAE 10 weight oil or sewing machine oil may be used as a substitute Do not use detergent oil Figure 1 3 Re connect the air Run the drill with...

Page 6: ...ressor and hoses Make sure compressor is set at 90psi and air lines are not twisted Stops operating Trigger or throttle valve is malfunctioning Have throttle valve trigger inspected and repaired at an authorized service center Torque is diminished Air leakage Check connections at the air inlet o rings etc Make adjustments repairs as needed Starts immediately as soon as air is connected without tri...

Page 7: ...y 1 02KL JNS4031KL 02 Keyless Chuck for Model JNS 4031KL only 1 03 JNS4031 03 Housing Sleeve 1 04 JNS4031 04 Bearing 6201 2 05 JNS4031 05 Gear Frame 1 06 JNS4031 06 Roll Pin Ø4x14 mm 3 07 JNS4031 07 Assembly Gear 3 08 JNS4031 08 Inner Gear 1 09 JNS4031 09 Washer 1 10 JNS4031 10 Front Plate 1 11 JNS4031 11 Bearing 626ZZ 1 12 JNS4031 12 Fixing Pin 1 13 JNS4031 13 Rotor 1 14 JNS4031 14 Rotor Blade 5 ...

Page 8: ...S4031 29 Trigger Base 1 30 JNS4031 30 Pin Ø2 5x24 mm 1 31 JNS4031 31 Main Housing 1 32 JNS4031 32 Exhaust Deflector 1 33 JNS4031 33 Screw M3x6 2 34 JNS4031 34 Air Inlet 1 35 JNS4031 35 Inlet Cover 1 36 JNS4031 36 Chuck Key for model JNS 4031 only not shown 1 37 JNS4031 WL Warning Label not shown 1 WMH Tool Group 2420 Vantage Drive Elgin Illinois 60123 Phone 800 274 6848 www wmhtoolgroup com ...

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