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11 

TOOL USE

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2

3

CLEARING JAMS:

Should a fastener jam occur, disconnect air supply.

➀ 

Release the feeder shoe and slide it forward. 

➁ 

Remove fasteners from tool.

③ 

Remove the bracket screw at the back of the tool and remove the magazine.

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2

3

Clear jammed fastener from guide body.

Reattach the magazine and fasten magazine mounting bracket screw.

Connect air supply and replace fasteners. Pull feeder shoe back.

The deflector can be rotated to 3 positions to change the direction of the exhaust air. 

Disconnect air supply, loosen cap screw with a hex wrench, and then rotate deflector to 
desired direction. 
Prior to tool use, ensure deflector cap screw is tightened.

This tool is equipped with a lockout feature:

When approximately five nails remain in the magazine, the workpiece contact (safety element) will be locked in the 
undepressed position until more nails are loaded into the magazine.

Repairs other than those described here should be performed only by trained, qualified personnel. Contact SENCO for 

information at 1-800-543-4596.

Read section titled “Safety Warnings” before maintaining tool.

Summary of Contents for JN91H1

Page 1: ... Issued October 26 2021 IMPORTANT Read before use Warnings for the safe use of this tool are included in this manual Los avisos para el uso seguro de esta herramienta están incluidos en este manual Les consignes pour l utilisation en toute sécurité de cet outil se trouvent dans ce manuel JN91H1 JN91P1 JN91H2 JN91P2 METAL CONNECTORS Operating Instructions ...

Page 2: ...yer s Responsibilities Keep this manual available for use by all people assigned to the use of this tool Employer must enforce compliance with the safety warnings and all other instructions which accompany this tool as shipped from the manufacturer Tool actuation system must be appropriate taking into consideration the work application The operator must be trained in the safe use of the tool descr...

Page 3: ...nd shall provide protec tion against flying particles both from front and side Hearing protection shall have Noise Reduction Rating determined in accordance with US Environmental Protection Agency Rules that is appropriate for the noise exposure Head protection shall conform to ANSI Z89 1 Explosion Hazard Never use tool in an explosive atmosphere or in the presence of combustible materials such as...

Page 4: ...igger and do not require a work contact element These tools are used in specialty applications and are typically used in industrial applications Light duty tools may have a dual action trigger The two stage trigger must be actuated in a sequence in order to drive a fastener This type tool does not require a work contact element and is used for specialty applications Some special application tools ...

Page 5: ...ed to air supply therefore remove all fasteners from tool before connecting air Do not load fasteners with trigger or workpiece contact element depressed Keep hands and body away from the fastener discharge area of tool near workpiece contact 1 Read and understand tool labels and manual Failure to follow warnings will result in DEATH or SERIOUS INJURY 2 Operators and others in work area MUST wear ...

Page 6: ...re to follow warnings will result in DEATH or SERIOUS INJURY Operators and others in work area MUST wear safety glasses with side shields Keep fingers AWAY from trigger when not driving fasteners to avoid accidental discharge Know and understand what trigger system you are using Check manual for triggering options NEVER point tool at yourself or others in work area NEVER use oxygen or other bottle...

Page 7: ...uctions are available to personnel performing maintenance shall ensure that tools that require repair are removed from service and that tags and physical segregation are used as a means of control Tool conditions that require the tool to be taken out of service Excessive leaks from pressure vessel Inoperable workpiece contact safety element Workpiece contact safety element that appears to bind dur...

Page 8: ...Functional Operation JN91H1 JN91H2 Grasping Surface Belt Hook Workpiece Contact Element Inlet Air Fitting Adjustable Exhaust Deflector Feeder Shoe Trigger ...

Page 9: ...Functional Operation JN91P1 JN91P2 Grasping Surface Belt Hook Workpiece Contact Element Inlet Air Fitting Adjustable Exhaust Deflector Feeder Shoe Trigger ...

Page 10: ...s Metal connector nails are not designed to penetrate metal When installing metal connectors always place the exposed point of the metal connector nail into the metal connector s pre formed hole and orient so the nail is perpendicular to the hole before attempting to drive a fastener Senco strongly recommends the use of hardened nails in the JN Series tools WORK CONTACT ELEMENT JN91H1 JN91H2 The m...

Page 11: ...tions to change the direction of the exhaust air Disconnect air supply loosen cap screw with a hex wrench and then rotate deflector to desired direction Prior to tool use ensure deflector cap screw is tightened This tool is equipped with a lockout feature When approximately five nails remain in the magazine the workpiece contact safety element will be locked in the undepressed position until more ...

Page 12: ...seal Verify air supply Tighten screws or install Parts Kit JN91H YK0895 JN91P YK0898 Air leak near bottom of tool Poor return Piston stop Piston seal Check for piston seal or sleeve wear If parts are worn or damaged parts are detailed in the parts chart Clean tool Tighten screws or install Parts Kit JN91H YK0896 JN91P YK0899 Other problems Contact SENCO ...

Page 13: ...Consumption scf cycle 0 0734 0 0734 0 1066 0 1066 Air Inlet 1 4 in NPT 1 4 in NPT 1 4 in NPT 1 4 in NPT Weight 5 41 lbs 2 71 kg 5 81 lbs 2 64 kg 7 44 lbs 3 38 kg 7 88 lbs 3 58 kg Fastener Capacity 30 54 Plastic 30 Paper 32 Plastic 43 Paper 46 Tool size Height 10 7 in 271mm 10 7 in 271mm 14 5 in 368 mm 14 5 in 368 mm Tool size Length 12 6 in 318 8 mm 18 2 in 463 mm 14 1 in 358 mm 19 2 in 488 mm Too...

Page 14: ...14 Fastener Specifications JN91H1 JN91H2 JN91P1 JN91P2 KJ17 KJ17 MD17 MD17 MD25 ND25 KJ17 131 MD17 148 ND25 162 KJ25 MD25 131 148 1 1 2 1 1 2 2 1 2 2 1 2 ...

Page 15: ...h SENCO Cordless tools will be free from defects in material and workmanship for one year after the purchase date Warranty Exclusions The following warranty exclusions apply 1 seals driver blades piston stops and piston driver assembly 2 This warranty does not cover parts damaged due to normal wear misapplication misuse accidents operation beyond the recommended speeds or voltage electric units on...

Page 16: ...KYOCERA SENCO Industrial Tools Inc 8450 Broadwell Road Cincinnati Ohio 45244 1 800 543 4596 www senco com ...

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