Munix MI CN-90 Instruction Manual Download Page 4

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14. BEFORE USING TOOL

, carefully check if 

there is any part damaged to obtain ideal results. Do 
not use the tool if the tool has any air leaks, 
uncompleted, damaged parts and needs repairing. 

15. NEVER USE TOOL

 if safety, trigger or spring is 

inoperable, missing or damaged. Do not alter or 
remove safety, trigger or springs Make daily 
inspections for free movement of trigger and safety 
mechanism. 

16.ONLY USE PARTS AND FASTENERS 

recommended by us.

 

17. CONNECT TOOL TO AIR SUPPLY BEFORE 

loading fasteners to prevent

 

fastener from being fired 

during

 

connection. The tool driving mechanism

 

may cycle when tool is connected to the air supply. 
When not in use remove all fasteners from the nail 
housing. 

18. ALWAYS ASSUME THE TOOL CONTAINS 
FASTENERS

. Keep the tool

 

pointed away from 

yourself and others

 

at all times. No horseplay. Respect 

the tool as a working implement.

 

19. DO NOT LOAD FASTENERS 

with trigger or 

safety depressed to prevent unintentional firing of a 
fastener. 

20. REMOVE FINGER FROM TRIGGER 

when 

not driving fasteners. Never carry

 

tool with finger on 

trigger: tool will fire a

 

fastener if safety is bumped 

while trigger

 

is depressed.

 

21. DON'T OVER REACH.

 Keep proper footing 

and balance at all times when using or handling the 

tool. 

22. FIRE FASTENERS INTO WORK SURFACE 

ONLY: 

NEVER into materials

 

too hard to penetrate.

 

 

 

 

 

 

 

PROBLEM CAUSE 

SOLUTION 

Failure to start tool. 

1. Tool dry, lacks lubrication. 
2. The spring in the cylinder cap is 
damaged. 
3. Valve sticks with cylinder cap. 

1. Use pneumatic tool oil 
2.Replace the spring in the 
cylinder cap. 
3.Disassemble/check/lubricate 

Blade driving fasteners 
too deeply 

1. Safe bracket poison is not correct. 
2. Air pressure is too high. 

1. Rotate knob of the adjuster to 
move safe bracket down. 
2. Decrease air pressure. 

Skipping 
fasteners/ feeding 
intermittently 

1. Having foreign matters between the 
small piston and small cylinder. 
2. O-ring on the small piston is worn 
and damaged. 
3. Tool dry and lacks lubrication. 
4. The spring on the small piston is 
damaged. 
5. Air pressure is lower. 
6. Connecting screw of nose and body 
is loose. 
7. Stopped hook can't stop the 
fasteners. 
8. Bent fasteners. 
9. Wrong size fasteners. 
10. Gasket is damaged. 
11.Dry small piston 
12. Small piston bumper is worn and 
damaged. 
13. Feed hook is binding. 
14. Nail length is not correct with 
loading space of nail housing. 
15. Weld wires in nail coilare broken. 

1. Disassemble/ clean/lubricate. 
2.Check/replaceO-ring/ lubricate 
3. Use pneumatic ic tool oil. 
4. Replace small piston the spring. 
5. Increase the air pressure, but don't 
exceed 120 PSI (8.3 bar). 
6. Tighten al l screws. 
7.Replace taper spring of the 
stopped hook. 
8. Use recommended fasteners. 
9.Use recommended fasteners 
10. Replace gasket/t tighten screw. 
11. Open nai l housing, place several 
drops of pneumatic tool oil into end 
cover hole of the small piston. 
12.Replace bumper and lubricate 
small piston. 
13. Clean feed hook and torsion 
spring. 
14.Adjust adjusting nut at the nail 
housing tail portion according to the 
recommended nail length to make 
arrow on the nail housing tail point 
to correct direction. 
15. Stop using. 

Runs slowly or has 
power loss 

1. Tool dry, lacks lubricate ion 
2. The spring in the cylinder cap is 
damaged. 
3. Having foreign matters between 
piston assembly and cylinder. 
4. Have not assembled the cylinder to 
home posit ion. 
5. O-ring on the valve is dry after 
disassembly. 
6. Air pressure is too low. 
7.Driver is worn (sort) 
8. Inner diameter of hose is small. 

1. Use pneumatic tool oil. 
2. Replace the spring in the cylinder 
cap. 
3. Disassemble/clean/lubricate. 
4. Reassemble after disassembling. 
5.Reassemble after lubricating 
6. Increase the air pressure, but don't 
exceed 120 PSI (8.3 bar). 
7. Replace piston assembly. 
8. Use bigger inner diameter of the 
hose. 

Fasteners are jammed 

1. Fasteners are wrong size. 
2. Weld wires in nail coil are broken. 

1. Use recommended fasteners. 
2. Stop using. 

 

Summary of Contents for MI CN-90

Page 1: ...355x368x130mm 3 5 kgs 225 300pcs 70 120PSI 4 9 8 3bar 1 4 N P T 45 90mm MI CN 90mm Thank you very much for purchasing our MI CN 90mm Pneumatic Coilnailer COILNAILER MI CN 90mm ...

Page 2: ...nder Cap 59 HCN041 O ring 9 5x1 9 9 HCN093 Gasket 60 HCN142 O ring 10 3x1 9 10 HCN094 Spring 61 HCN143 Trigger Valve Seat 11 HCN095 Valve Seat 62 HCN044 O ring 12 8x1 9 12 HCN096 O ring 48 8x2 5 63 HCN144 Spring 13 HCN097 Valve 64 HCN145 O ring 5 5x1 5 14 HCN098 O ring 67x3 65 HCN146 Trigger Valve Stem 15 HCN099 Collar 66 HCN147 Tirgger Valve Guide 16 HCN100 Cylinder Seal 67 HCN148 Spring Pin 3x26...

Page 3: ...sion rust or in a having heavy powder environment 11 DISONNECT TOOL FROM AIR SUPLY HOSE before doing tool maintenance clearing a jammed fastener leaving work area moving tool to another location or handing the tool to another person 12 ONLY DISCONNECT THE QUICK CONNECTOR with the connector of the body tail portion air inlet no compressed air can be guaranteed when disconnecting If operation is not...

Page 4: ...rs between the small piston and small cylinder 2 O ring on the small piston is worn and damaged 3 Tool dry and lacks lubrication 4 The spring on the small piston is damaged 5 Air pressure is lower 6 Connecting screw of nose and body is loose 7 Stopped hook can t stop the fasteners 8 Bent fasteners 9 Wrong size fasteners 10 Gasket is damaged 11 Dry small piston 12 Small piston bumper is worn and da...

Page 5: ...ten screw recheck 2 Check replaceO ring lubricate 3 Replace the bumper 4 Disassemble and clean Air leaking at the upper portion and nose body 1 Screw is loose at the connecting port ion of the cylinder and body 2 O ring is damaged 3 Gasket is damaged 1 Tighten the screw and recheck 2 Check replace0 ring lubricate 3 Replace the gasket 23 GRIP TOOL FIRMLY TO MAINTAIN CONTROL while allowing tool to r...

Page 6: ...ep to achieve desired results See Fig 20 CLEARING A JAMMED FASTENER 1 CAUTION Disconnect tool from air supply 2 Open latch rotate lower housing and remove the nails of the lower housing 3 Use a slender soft steel rod to drive the drive blade to its uppermost position Use needle nose pliers to remove the jammed fastener see Fig 21 4 Follow instructions in PREPARING THE TOOL BEFORE DRIVING to reload...

Page 7: ...ing the tool to another person Clean and inspect tool daily Carefully check for proper operation of trigger and safety mechanism Do not use the tool unless both the trigger and the safety mechanism are functional or if the tool is leaking air or needs any other repair FASTENER SPECIFICATIONS Only use recommended fasteners They may be screw ring and smooth fasteners OPERATING INSTRUCTIONS FOREWORD ...

Page 8: ...9 16 nails 4 Rotate to the side of the body Place a coil of nails over the Lower Nail Housing Uncoil enough nails to reach the Feed Hook and place the second nail between the teeth on the Feed Hook 5 Close the latch see Fig 17 6 Adjust directional exhaust deflector see Fig 18 so that the exhaust air blast will be directed away from the operator Grasp the deflector and rotate it to the desired posi...

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