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Your tool is now ready to work. Insert rivet mandrel into nosepiece. Insert rivet into 
predrilled hole in application and pull trigger button and hold until rivet sets then 
release the trigger. A second pull may be required. 

 

CLEANING & CHANGING OF JAWS 

 

With use, the jaws of the tool may become dirty or worn. This will cause slipping of 
the rivet mandrel & and improper setting of the rivet. To clean the jaws follow this 
procedure. 

 

1. Disconnect air supply. 
2. Use a suitable wrench, unscrew frame head and remove. 
3. Using a pair of wrenches, disassemble front jaw case from rear jaw case. 
    DO NOT MOVE rear jaw case as this will affect tool operation. 
4. To clean jaws, use a stiff dry wire brush. 

5. If excessive wear is apparent, replace with new jaws. 
6. Reassemble the jaw case assembly. 
 

 

 

 
 

LIMITED TOOL WARRANTY

 

 

This warranty applies to the purchaser of the tool for original use only. 

All other warranties, whether expressed or implied, including any warranties of merchantability or fitness 

for purpose are hereby excluded. 

 

CHANGING NOSEPIECES 

 

1.

After selecting the correct size nosepiece for the rivet being used 
Connect tool to air supply and pull trigger and hold trigger button.

  

2. Using wrench (supplied), unscrew nosepiece from frame head & 

replace with proper size nosepiece. Tighten down with wrench. DO 
NOT OVERTIGHTEN. Release trigger. 

 

A

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 Fastening Systems - Marson division warrants that this tool will be free from  defects in material 

and  workmanship under normal service and for ninety (90) days from the date of purchase. 

 
Should this tool fail during this ninety (90) day period, and no unauthorized repairs have been made, return 
the tool freight prepaid to the factory for free of charge replacement of any part or parts found by A

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Fastening System

s

 - Marson division to be defective due to faulty material or workmanship. This represents 

the sole obligation of A

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 Fastening Systems - Marson under this warranty. In no event shall A

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Fastening Systems - Marson division be liable for any consequential or special damages arising from the 
purchase or use of this tool. You may have other rights which vary from state to state. 

 IF further maintenance is beyond the scope of this manual and the tool fails to function properly, contact

 the factory or return it to the factory for service. 

Contact our Tool Repair Center at 209-839-3032 for further information

Summary of Contents for MARSON MP-4V

Page 1: ...hed hose for operator convenience Each tool is supplied with nosepieces to set 5 32 1 4 rivets in all alloys A 1 4 Monobolt nosepiece is included in addition to adjustment service wrenches fluid applicator spare jaws and an air off on valve The adjustable Vacuum System control knob located on the side of the tool allows you to control the force of the air needed to hold the rivet in place or you m...

Page 2: ...into the collection cup If you don t want to use the vacuum system rotate the silver knob counter clockwise to shut it off The tool will still function but must be tilted backwards to allow spent mandrel to fail into collection cup ADDITION OF HYDRAULIC FLUID 1 Disconnect air supply to tool and switch ON OFF valve to OFF position 2 Remove seal screw and seal see Fig 3 3 Screw the priming pump of f...

Page 3: ... the rivet being used Connect tool to air supply and pull trigger and hold trigger button 2 Using wrench supplied unscrew nosepiece from frame head replace with proper size nosepiece Tighten down with wrench DO NOT OVERTIGHTEN Release trigger Arconic Fastening Systems Marson division warrants that this tool will be free from defects in material and workmanship under normal service and for ninety 9...

Page 4: ...4 MP 4V BREAKDOWN PARTS LSIT ...

Page 5: ...M95319 Seal plastic housing 62 M95364 On Off assembly 18 M95320 Sealing ring 20x13 5x3 5 63 M95365 Valve rod 19 M95321 Head assembly 64 M95366 Screw plug 20 M95322 U Ring 14x22x6 3 65 M95367 Silencer 21 M95323 Retaining nut 66 M95368 Cylinder cover 22 M95324 O Ring 26 7x1 78 67 M95369 O Ring 81 7x1 9 23 M95325 U Ring 30x22x6 68 M95370 Bolt 24 M95326 Principal Axis Unit 69 M95371 Lock nut 25A M9532...

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