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GAMA Master III Series Service Manual

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Service Manual
Spray Gun
Series Master III
1.4 Issue 20/04/2017
Ref. NR-00073-ENG
Before installing and operating the MASTER III gun, carefully read the
technical and safety documentation in this manual. Special attention
should be paid to the information in order to know and understand the
handling and conditions of use of the Unit. All of the information is aimed
at enhancing User Safety and avoiding possible faults due to incorrect
use of the Unit.

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Summary of Contents for GAMA Master III Series

  • Page 1 Service Manual Spray Gun Series Master III 1.4 Issue 20/04/2017 Ref. NR-00073-ENG Before installing and operating the MASTER III gun, carefully read the technical and safety documentation in this manual. Special attention should be paid to the information in order to know and understand the handling and conditions of use of the Unit.

  • Page 2: Warranty

    Product or which should fail to strictly comply with the instructions of use provided by GAMA; due to accident, carelessness, adjustments, alterations or modifications of the Product not authorised by GAMA or due to the use of accessories, heating devices, pumping equipment and/or dispensers that have not been approved or manufactured by GAMA.

  • Page 3: Safety And Handling

    Keep this Service Manual for future consultation of useful information at all times. If you lose the manual, ask for a new copy from your local GAMA distributor or make direct contact with Garraf Maquinaria, S. A.
  • Page 4 Service Manual When working with the gun, it is essential to dress suitably and use personal protection equipment, including the unlimited use of gloves, protective goggles, safety footwear and face masks. Use breathing equipment when working with the gun in enclosed or insufficiently ventilated atmospheres.

  • Page 5: Characteristics

    Service Manual CHARACTERISTICS * High-pressure internal mixture * Automatical cleaning by pressurised air * No solvents required * Mechanical spraying * Exterior greasing of the mix chamber Approximate weight: 1 Kg Dimensions: H 19 cm / W 9 cm / L 19 cm SPECIFICATIONS Maximum working pressure: _________________________ 246 Kgf/cm2 (24 MPa) / 3500 psi Required air pressure: _________________________ 6-8 Kgf/cm2 (0.6-0.8 MPa) / 85-114 psi...

  • Page 6: General Description

    Service Manual GENERAL DESCRIPTION The main components and their description are given for better knowledge of the elements of the NEW MASTER III gun. For a more precise identification, see the Components Manual ref. NR-00072. Head Unit. Polyol Side Cartridge Unit Isocyanate Side Cartridge Unit Polyol Non-Return Cartridge Unit.

  • Page 7: Installation And Start-Up

    GAMA provides a series of tools and accessories which are necessary for assembling the gun. The unit is made up of the following elements: Tube spanner, chuck holder, grease tube, air connection pipe, fast plug, cleaning chucks, operations manual and components manual.
  • Page 8 Service Manual Open the manual air valve Pressurise the unit and make sure there are no leaks. Activate the trigger several times to make sure the mix chamber moves correctly. Make sure that the pressure in the machine and the temperature of the heaters and the hoses are correct (see the Machine Service Manual).
  • Page 9 Service Manual This NEW MASTER III model comes with a head turning mechanism so that it can be turned according to the inlet position of the product hoses. Do the following to make the change: Completely close the manual valves by turning them clockwise. To eliminate the pressure from the gun, press the trigger and project with the gun until the projection fan begins to narrow.

  • Page 10: Standstill Method

    Service Manual STANDSTILL METHOD Perform the Unit Standstill Method with the procedure indicated in the Machine Service Manual. Completely close the manual valves of each product by turning them clockwise. To eliminate the pressure from the gun, press the trigger and project with the gun until the projection fan begins to narrow.
  • Page 11 Service Manual 13. Remove the stopper and grease the mix chamber with the greasing pump supplied in the kit with the gun. this will prevent the cleaning air of the gun from drying the ISOCYANATE product, and will therefore prevent it from crystallising and scratching the chamber and the bushing.

  • Page 12: Maintenance

    Service Manual MAINTENANCE To get the most of your MASTER III gun, periodical maintenance must be carried out. Carefully read the safety data sheet provided by your supplier to prevent any possible injury caused by incorrect handling of the raw materials and solvents used in the process.

  • Page 13: Gun Block Unit And Mix Chamber

    Service Manual Gun block unit and mix chamber WARNING: Before carrying out maintenance work on the gun, make sure that the unit has been completely stopped, that all of the push buttons and the main switch are turned off and that the unit is disconnected from the main power supply. The gun is a component which works under pressure.
  • Page 14 Service Manual Remove the lower check valve cartridges as shown on page 10 with the help of a screwdriver, threaded rod or screw. Loosen the head fixing nut by turning it anti-clockwise and then remove the central block or head by turning it 45º clockwise and pulling on it so that it separates from the rest of the gun.
  • Page 15 Service Manual 10. To clean the product holes of the chamber, use suitable brushes of the right size for the holes. It is not necessary to remove the head chamber to do this operation. Cleaning “Round” Chamber Product Input Cleaning “Round” Chamber Product Holes Output Hole N.B.: the chamber cleaning chucks are attached with them in the spare parts and in the...
  • Page 16 Service Manual 14. Insert the mixing chamber in the head paying attention to its position (“A” ISO side “R” POL side). Make sure the notch on the head of the chamber is always turned to the “A” side ISO. 15. Fit the seal and the PCD if you are working with the “Flat”...

  • Page 17: Side Cartridge Unit

    Service Manual Side cartridge unit WARNING: Before carrying out maintenance work on the gun, make sure that the unit has been completely stopped, that all of the push buttons and the main switch are turned off and that the unit is disconnected from the main power supply. The gun is a component which works under pressure.

  • Page 18: Filter And Non-Return Cartridge Unit

    Service Manual 11. Carry out the projection procedure indicated in the start-up section. 12. Start the gun. PRECAUTION : Use wooden or plastic utensils or a brass brush for cleaning. Do not use metal utensils that can scratch the contact surfaces. Filter and Non-Return cartridge unit WARNING: Before carrying out maintenance work on the gun, make sure that the unit...

  • Page 19: Trigger And Valve

    Service Manual Trigger and valve WARNING: Before carrying out maintenance work on the gun, make sure that the unit has been completely stopped, that all of the push buttons and the main switch are turned off and that the unit is disconnected from the main power supply. The gun is a component which works under pressure.
  • Page 20 Service Manual Make sure the trigger shaft housing is clean and apply a small layer of grease inside. 10. Fit the air hose to the rear of the gun with sealing paste on the thread to avoid air leaks. 11. Insert the trigger shaft in the spring and insert it inside the grip taking special care not to damage the o-rings.

  • Page 21: Cylinder Block And Blocking Device

    Service Manual Cylinder block and blocking device WARNING: Before carrying out maintenance work on the gun, make sure that the unit has been completely stopped, that all of the push buttons and the main switch are turned off and that the unit is disconnected from the main power supply. The gun is a component which works under pressure.
  • Page 22 Service Manual 10. Fit the cylinder block on the blocking screw. Slip the spring and the blocking device on the blocking screw. Screw in the two adjustment screws, making sure that they are perfectly flush with the flats at the end of the blocking screw. Make sure that the blocking device is well-fitted.

  • Page 23: Pneumatic Cylinder

    Service Manual Pneumatic cylinder WARNING: Before carrying out maintenance work on the gun, make sure that the unit has been completely stopped, that all of the push buttons and the main switch are turned off and that the unit is disconnected from the main power supply. The gun is a component which works under pressure.
  • Page 24 Service Manual WARNING: To guarantee that the cylinder block is correctly fixed, make sure that the retention ring is perfectly housed in the fixing groove. To avoid any possible error in assembly, avoid approaching the cylinder block when pressure is applied to the gun after performing any cleaning, repair or maintenance work.

  • Page 25: Table Of Contents

    Service Manual CONTENT Warranty _____________________________________________________ 2 Safety and Handling ____________________________________________ 3 Characteristics ________________________________________________ 5 Specifications _________________________________________________ 5 General Description ____________________________________________ 6 Installation and Start-up ________________________________________ 7 Standstill Method _____________________________________________ 10 Maintenance _________________________________________________ 12 Gun block unit and mix chamber ______________________________________________ 13 Side cartridge unit _________________________________________________________ 17 Filter and Non-Return cartridge unit____________________________________________ 18 Trigger and valve __________________________________________________________ 19...

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