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7. TROUBLESHOOTING   

Problem 

Possible Causes 

Suggested Remedy   

Spray size generally uneven 
due to poor atomization. 

1.Too much paint entering air 

flow. 

2. Insufficient air hitting paint 

flow. 

1.Decrease  paint  flow  or  reduce  the  nozzle  to 

the next size down. 

2.Increase air flow on the spray gun's air control. 

Intermittent spray. 

1. Air is getting into the paint 
circuit. 

1.Tighten the nozzle up with the multi size 

spanner. 

2.Check the paint pot is not empty. 

A lot of overspray. 

1.Spray gun distance from 

work piece. 

2.Technique.

   

3. Atomization too high. 

1. Maintain a distance of approx. 20cm. 
2. Make sure you are not flicking the gun on the 

leading or trailing edge. 

3. Reduce air flow on the spray gun's air control. 

 

Badly formed spray pattern. 
 
 
 

 

 

1. Nozzle or air cap alignment. 
2. Debris or dried paint 

blocking air cap or nozzle. 

3. Needle tip worn or damage. 

 

1. Check that both are correctly seated. 
2. Check and if necessary clean the air cap and           

nozzle. 

3. Replace needle assembly. 
 

Lack of spray in the centre. 

 

 

1.Not enough paint entering air 

flow. 

2.Too much air flow. 

 

1. Increase paint flow or step up the 

nozz\e to the next size. 

2. Reduce air flow on the spray gun's 

air control. 

 

Uneven fan shape. 

 

 

1. Air cap holes blocked on 

one side. 

2. Needle tip and air cap worn 

or damaged nozzle. 

 

1. Clean the air cap thoroughly. 
2. Replace needle assembly. 
 

Air or paint leaking. 
 

1. Sticking trigger or needle 

mechanism. 

2. Loose or worn packing 

washers. 

 

1. Lubricate all moving parts, 
2. Check tightness. If tight, repla 
    lubricate packing washers. 
 

NOTE:

 Any adjustments made to remedy a problem will alter the original test pattern results. Slight rebalancing 

may be necessary. 

 
 
 
 
 
 

Summary of Contents for CT3321

Page 1: ...GUN CT3321 ORIGINAL INSTRUCTIONS SAVE THESE INSTRUCTIONS AND PRECAUTIONS READ ALL PRECAUTONS AND INSTRUCTIONS BEFORE USE Cannon Tools Limited Address 20 Station Road Rowley Regis West Midlands B65 0J...

Page 2: ...on its design and type as brought into circulation by us In case of alteration of the machine not agreed upon by us this declaration will lose its validity Product description SPRAY GUN Model CT3321 A...

Page 3: ...ear approved safety respiratory protection and safety eye goggles If spraying isocynate based finisher wear approved respirator clean air breathing apparatus and cover exposed skin with latex gloves a...

Page 4: ...ir inlet 1 4 Nozzle Size 0 8mm Cup size 120cc Operating pressure 30 50 psi Air consumption 2 8 cfm 3 AIR SUPPLY FAILING TO COMPLY WITH THESE INSTRUCTIONS WILL RESULT IN YOUR AIR TOOL FAILING EARLY THI...

Page 5: ...the thread before turning it clockwise to tighten 4 Make sure the bleed screw B is screwed in to prevent paint loss 5 Screw the paint pot assembly into the top of the spray gun connector C Turn the po...

Page 6: ...ension on the fluid needle allowing removal SPRAY GUN SETUP TEST PATTERN Fig 6 8 A perfect spray gun setup is only ever a temporary achievement factors which affect this include the choice of material...

Page 7: ...gun across the work piece keeping it parallel all the way A fluid wrist action will be necessary Begin pulling the trigger before the leading edge of the work piece is reached holding it in fully as...

Page 8: ...nt is removed 5 Reassemble the spray gun components lubricating all nylon packing washers and any moving parts that pivot or slide Only apply a lubricant specifically designed for use on a spray gun 6...

Page 9: ...rmed spray pattern 1 Nozzle or air cap alignment 2 Debris or dried paint blocking air cap or nozzle 3 Needle tip worn or damage 1 Check that both are correctly seated 2 Check and if necessary clean th...

Page 10: ...cording to national regulations In all circumstances Do not abandon in the environment Always read the literature supplied with the paint to ensure it is compatible with the equipment and any other pa...

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