Probler Gun Troubleshooting Guide
Contents
1. S a Ee POLYSOURCE URETHANE FOAMS ELASTOMERS amp COATINGS PROCESS EQUIPMENT SALES SERVICE amp RENTALS PROBLER GUN TROUBLESHOOTING GUIDE Why did the clip ring on the air piston inside the Probler Gun break clip ring 16828 01 a Check air pressure to gun Too much air pressure over 100psi can break the clip ring Regulate gun pressure to 90 100 psi at 10 CFM b Mixing chamber nozzle was pushed forcefully towards gun body breaking the clip ring Causes are dropping the gun or improperly forcing the gun to trigger NOTE If Probler Gun will not trigger and gun has required air supply DO NOT force chamber back into gun to break it free This will result in costly damage to the gun and is the result of poor maintenance or improper shutdown procedure The Gun needs to be taken apart and properly cleaned When gun is air purging I see a mist of ISO or Poly coming out the nozzle with the purge air Why and what should be done a Side block seal is leaking 16811 01 or T4 132 seal Remove seal assembly 17275 00 and inspect seal chamber and seal housing see seal inspection section 5 NOTE A raised sharp edge on the side port of the mixing chamber can damage the seal mixing chamber 17637 xx or 18375 xx seal 16911 01 or T4 132 See chamber dressing section 6 NOTE When replacing a seal be sure to inspect the inside of the seal housing housing 16812 00 If there is bu2. eat properly housing 16812 00 Soak housing in a suitable cleaning solvent to remove build up Be careful not to scratch the inside surface when cleaning see Seal Inspection section 5 1 3 The piston rod is bent What a The gun was dropped causes it b The gun mix chamber was improperly forced towards the gun body by means of a hammer or pushing the nozzle against a solid surface 1 4 The Probler continuously a The middle o ring on the trigger assembly is cut o ring 7554 53 trigger leaks air from the bottom of T4 171 Replace o ring the handle Why b The trigger adjustment nut is out too far nut 16839 00 Adjust by tightening nut until leaking stops NOTE If the trigger nut is adjusted out too far it will not allow the spring return to shuttle the trigger spool to its normal position If the trigger nut is adjusted in too far the gun will not trigger properly 1 5 There is air leaking from the a The front o ring on the trigger assembly is cut and needs to be replaced trigger button trigger button o ring 7554 53 trigger assembly T4 171 PG 16 Why 1 6 There is air leaking from the a The back o ring on the trigger assembly is cut and needs to be replaced trigger retaining nut nut o ring 7554 53 trigger assembly T4 171 16839 00 Why 1 7 There is air leaking around a There is material build up on the side blocks and or the front housing of the side block and gun head the gun side blocks T4 144 and T4 143
3. housing 16800 00 Using a new Why and how to stop it razor blade shave off the build up Finish with a fine grit wet dry sandpaper 1 200 or finer grit 1 8 When the gun is triggered the a An o ring on the air piston is cut or damaged and needs to be replaced purge air stays on Why and o ring 7554 03 7554 O05o0r 7554 29 Remove air piston assembly and how is it stopped replace damaged o rings Air piston assembly 16820 00 This can be caused by a scar in the air passage debris in the air passage or solvent contamination causing the o ring to swell and be cut during operation 1 9 There is air leaking from the a The slide valve o rings are cut or damaged and need to be replaced air on off slide valve slide o rings 7554 09 valve 16832 00 assembly Why and how is it fixed The Probler is leaking air a The o ring that seals between these two parts is damaged and needs to be 20 from between the gun body and the front housing gun body 16867 00 and housing 16800 00 Why and how is it fixed replaced o ring 7554 12 1 19725 Telegraph Trail Langley BC V1M 3E6 Tel 604 888 3505 Fax 604 888 3503 3
4. ild up or contamination it can keep the seal from seating properly I keep cutting side block seals 16811 01 orT4 132 seals soon after installation Why a Check the mixing chamber for burrs or scratches mixing chamber 17637 xx or 18375 xx See chamber dressing to recondition mixing chamber NOTE If a drill bit is used to clean the side ports of the mixing chamber a burr can form on the mixing chamber side port Always inspect the mixing chamber surface after cleaning with a drill bit It is important to insert the drill bit into the mixing chamber side port as straight as possible Using an angle other than 90 can raise an edge on the side port NOTE The air purge will clean the chamber but A and B materials can begin to scale on the side of the mix chamber after continual use This needs to be cleaned periodically If build up continues it can become hardened and damage the seals See chamber dressing section 6 There are sharp edges on the side ports of the mixing chamber mix chamber 17637 xx or 18375 xx How do I remove them a See Chamber Dressing section 6 NOTE Cleaning the side port with a drill bit most likely causes this Always inspect mixing chamber surface after cleaning with a drill bit Attempt to insert drill bit straight into side port holes Going in at an angle can raise an edge 5 There is air to the gun and air a The mixing chamber slides
5. n and what to do about it cleaning will correct the condition 7 All the air passages in the a The high pressure ball valves were not closed when the bolts holding the Probler were foamed up side blocks were loosened causing material to fill the internal gun crossed over Why and how chambers ball valves PG 15 side blocks T4 144 and T4 143 bolts are they cleaned out 9944 48C b Total seal failure seal 16811 01 or T4 132 This is rare and can be avoided with proper gun maintenance and timely seal replacement NOTE To clean the gun take apart drill out internal passages and soak in a suitable cleaning solution 8 The mixing chamber does not a The piston throw set screw replace is out of adjustment and needs to be line up with the holes in the reset nut 17259 16F See resetting Piston Throw Adjustment section 7 side block seals when the gun NOTE is triggered Why and how The piston throw is factory set and should not be accessed unless the are they lined up correctly piston is out of adjustment 9 The high pressure ball valves a Tighten valve packings Remove valve handles by loosening allen screws on the Probler seem loose and and pulling handles off This will expose the ball valve packing flats may be leaking valves With a wrench tighten the packings to snug Reassemble the gun and PG 15 How do I fix them perform ball valve seal integrity test see Ball Valve Seal Integrity Test section 4 1 0 The mi
6. through a guide channel in the front housing purge is good When gun is of the Probler Gun housing 16800 00 Remove side blocks side blocks triggered the piston is T4 144 and T4 143 and front housing housing 16800 00 The mixing sluggish to retract or doesn t chamber should be able to slide freely through the guide channel Inspect move Why and clean if needed b Air starvation Make sure that the gun is being supplied with 10 CFM at 100 psi c Air starvation If the gun has the required air supply check the internal air passages in the Probler Gun body If gun was recently crossed over crossed over cured foam in the internal air passages the vertical passage elbow is most likely restricted Clean our the air passages with proper sized drill bits see diagram of Probler Gun air passages d The air piston in the back of the gun needs to be well lubricated with white lithium grease If this area is dry o rings can dry out and make for sluggish trigger actuation 6 When the side blocks are a Build up is caused by leaking side block seals and or ball valves seals removed there is a material 16811 01 and T4 132 ball valves PG 15 See seal inspection build up around the chamber b Gradual scaling of material on the sides of the mixing chamber is a and where the chamber passes normal occurrence See Chamber Dressing section 6 When cleaned through the gun head Why periodically this creates no problem More frequent gun inspectio
7. xing chamber is not a With a new razor blade shave the mixing chamber surface mixing smooth and is built up with chamber 17636 xx or 18375 xx Be careful not to scratch the surface If material How is it fixed the surface is scratched see Chamber Dressing section 6 NOTE Be careful that your cleaning does not damage the mixing chamber If build up is severe consider soaking in a suitable cleaning solution before shaving 1 1 There are scores on the mix a Abrasive filler can cause this Try Glas Craft hardened mixing chambers chamber Why and how are for longer life mixing chambers 17637 G xx or 18375 G xx they fixed b Hardened material on the seal surface can cause this seal 16811 01 or T4 132 See shutdown procedures c Improper cleaning can cause this See chamber dressing to recondition mixing chamber section 6 ze 1 2 When a new side block seal is a The honed inside of the seal housing is scratched housing 16812 00 put in material seeps around Replace housing the shoulder of the seal NOTE between the seal and housing The scratch is most likely from a previous cleaning with a sharp object Why and how do I fix it Use care when cleaning this housing The inside surface is honed to give a high pressure seal to the shoulder of the seal seal 16811 01 or T4 132 housing 16800 00 b There is material build up on inside of seal housing and it is not letting the seal s
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