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1.  Read and understand this entire manual before attempting assembly or operation. 

2.  Read and understand the warnings posted on the tool and in this manual. Failure to comply with all of 

these warnings may cause serious injury. 

3.  Replace the warning labels if they become obscured or removed. 

4.  This ratchet wrench is designed and intended for use by properly trained and experienced personnel 

only. If you are not familiar with the proper and safe operation of an air-operated ratchet wrench, do 
not use until proper training and knowledge have been obtained. 

5.  Do not use this tool for other than its intended use. If used for other purposes, WMH Tool Group 

disclaims any real or implied warranty and holds itself harmless from any injury that may result from 
that use. 

6.  Always wear approved safety glasses/face shields while using this ratchet wrench. (Everyday 

eyeglasses only have impact resistant lenses; they are 

not

 safety glasses.) 

7.  Wear ear protectors (plugs or muffs) if the noise exceeds normal levels. 

8.  Use gloves if needed when operating the ratchet wrench. Keep hands and body away from the 

working area of the tool. 

9.  Some dust created by power sanding, sawing, grinding, drilling and other construction activities 

contains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples 
of these chemicals are: 

  Lead from lead based paint. 

  Crystalline silica from bricks, cement and other masonry products. 

  Arsenic and chromium 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 or any medication. 

11. Maintain proper balance and keep your footing at all times. Non-slip footwear or anti-skid floor strips 

are recommended. 

12. Before operating this ratchet wrench, remove tie, rings, watches and other jewelry, and roll sleeves 

up past the elbows. Remove all loose clothing and confine long hair.  

13. Excessive air pressure and too much free rotation may decrease the life of the tool and may cause a 

hazardous situation. 

14. Check air hoses for wear, and keep them away from heat and sharp edges. Do not carry the ratchet 

wrench by the air hose. 

15. Do not use this air tool near flammable objects or potentially explosive environments. 

16. Do not leave a connected tool unattended. When not in use, disconnect tool from the air source. 

17. Disconnect rachet wrench from air supply before making adjustments or changing accessories. 

18. Keep work area clean and free of clutter.  

19. Keep visitors a safe distance from the work area. 

Keep children away.

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20. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are 

careless acts that can result in serious injury. 

21. Do not force a tool or attachment to do a job for which it was not designed. The right tool will do the 

job better and safer. 

Summary of Contents for JNS-5052

Page 1: ...aintenance Instructions 3 8 inch Air Ratchet Wrench Model JNS 5052 WMH TOOL GROUP 2420 Vantage Drive Elgin Illinois 60124 Part No M JNS5052 Ph 800 274 6848 Revision B 1 07 www wmhtoolgroup com Copyright WMH Tool Group ...

Page 2: ...ate 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 at our expense unless it is determined by us that there is no defect or that the defect resulted from causes not within the scope of our warranty in which case ...

Page 3: ... chromium 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 al...

Page 4: ... safest performance Specifications Stock Number JNS 5052 Square Drive in 3 8 Free Speed no load RPM 160 Maximum Torque ft lb 50 Required Air Pressure PSI 90 Average Air Consumption CFM 4 Air Inlet Diameter in 1 4 NPT Air Hose Inside Diameter in 3 8 Vibration Value m s 2 according to EN12096 7 2 Overall Length in 11 62 Net Weight lbs 2 76 The above specifications were current at the time this manua...

Page 5: ...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 3 Re connect the air Run the ratchet wrench without load for a few seconds to distribute the oil throughout the tool 4 When you are finished operating the ratchet wrench b...

Page 6: ... 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 trigger being pressed Throttle valve or trigger is malfunctioning Inspect and repair throttle valve and or trigger Abnormal vibration and or excessive heat develops in the to...

Page 7: ...7 ...

Page 8: ...8 WMH Tool Group 2420 Vantage Drive Elgin Illinois 60124 Phone 800 274 6848 www wmhtoolgroup com ...

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