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 SAFETY WARNINGS

5

Always place yourself in a firmly balanced position.
Stay alert, focus on your work and use common sense when using tool.

Keep bystanders and children away while operating tool. 

Store idle tools out of the reach of minors or other untrained persons. 

Drive fasteners into work surface only; never into materials too hard to penetrate.

Do not force tool. Let the tool do the work.

Use the correct tool for the application. The correct tool will do the job better and safer.

Tools shall be operated at the lowest pressure needed for the application. This will reduce noise levels, part wear, and 
energy use.
Do not drive fasteners on top of other fasteners or with the tool at too steep of an angle; the fasteners can ricochet and 
may cause injury.
When using tool, care should be taken due to possibility of tool recoil after a fastener is driven. 
If safety element is unintentionally allowed to re-contact work surface following a recoil, an unwanted fastener will be 
driven. Therefore, allow tool to recoil completely off work surface after a fastener is driven to avoid this condition. 
Do not push safety element on work surface until a second fastener is desired.
Do not drive fasteners close to the edge of the work surface. Keep face and body parts away from tool and work sur-
face. The workpiece is likely to split and the fastener could fly free or ricochet and may cause injury.

2

1

Tool may eject a fastener when connected to air supply; therefore,

① 

remove all fasteners from tool

② 

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 safety glasses with side shields.  (3) Keep fingers AWAY from trigger 
when not driving fasteners to avoid accidental firing.  (4) See manual for triggering instructions.

(5) NEVER point tool at yourself or others in work area.  (6) NEVER use oxygen or other bottled gases. Explosion may occur.
(7) MAX AIR PRESS. 120 PSI (8.3 BAR)

Operating Controls

Do not use tool without danger label on tool. If label is missing, damaged or unreadable, contact your SENCO represen-
tative to obtain a new label.

Never use tool  if safety element, trigger or springs have become inoperable, missing or damaged. Do not tamper with 
or remove safety element, trigger or springs.
Disconnect tool from air before doing tool maintenance, clearing a jammed fastener, leaving work area, moving tool to 
another location or handing the tool to another person, when not in use or outside of the operator’s supervision.

Tools shall not be modified unless authorized in tool manual or approved in writing by manufacturer.

Use only parts, fasteners, and accessories recommended or sold by SENCO. Do not modify tool without authorization 
from SENCO.

Proper Power Source

Use only clean, dry, regulated compressed air at recommended pressure.
Do not operate the tool with any alternate power source.

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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