Dieseling

[durbsguy]

Afternoon gents

 

I have had my HW97 serviced recently, by the shop from whence it came. A week later I picked the gun up and was informed that they had replaced the spring as apparently it been butchered by the manufacturing company. I was even more surprised that the service and replacement spring was free.

 

First time since the service at the local range, every 5th shot or so it sounded like a 22 small bore rifle and duly reprimanded. I asked how to sort the problem and was given 2 separate ideas of where the dieseling occurs and hence 2 separate solutions. Firstly the I was told the dieseling occurred in the compression chamber and the other that is the dieseling occurs in the barrel. Does anyone have any ideas and if so how to fix?

 

regards

Adrian

[lineshooter]

There could be lube/oil in the barrel, try swabbing with a dry patch, if you have`nt fired many pellets since service then it may need to settle down.

 

I`d take it back though if you`re not happy they may have been a bit heavy handed with the lube on the spring.

Edited August 7, 2011 by lineshooter

[Beretta28g]

Deiseling is usually too much lube in the barrel.

[durbsguy]

Cheers Lineshooter

 

On taking your advice I've cleaned the barrel and seen thick black oil residue left on the port and barrel, this was cleaned off until the pull through came out clean. The very next shot there came the familiar bang. So the barrel and loading port was cleaned again with the same amount of gunk coming out. This continued firing and cleaning until I got tired of it after 25 shots. So I gather it can't be long now until all the oil has been blown out.

[Ratsmasher]

give the barrel a good clean and if it is still making the noise the problem is in the chamber and I would take back to gunshop where it was serviced and they should sort it for free

if your feeling brave you could strip it down to the piston and give that a good clean off but not sure how easy that is on the hw97s

good luck and I wouldnt shoot it unless you can avoid it until the problem is fixed

atb ratty

[Gnome of the Woods]

It will be over zealous lubing of the spring and piston.

Dieseling is caused by the compression of air in the comp tube just as in a diesel engine.

 

Sounds like it just needs a clean up from the shop that did it.

HW are well known for there less than delicate reducing of springs length.

[buster321c]

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What she said ..........

[durbsguy]

thanks for the responses guys. I think the best thing to do is to take the gun back to the shop. Just had the old bill round as a neighbour has complained about the noise. I suppose it is back to the old pcp for this week.

[Polish]

I concur with the sound advice from the lads above. Most likely someone getting a little greasy with your gun. I service my springers regularly and have learnt that a little goes a long way

 

Hope all gets sorted quickly.

[bruno22rf]

Take it back to the shop-not only can it mess up the gun but it can push the velocity over the legal limit.When you collect it next time get a chrono test from the dealer to prove its power output-this problem is caused by combustible lubricants seeping forwards onto the piston seal.

[Ginney]

IT AS PROBERLY BEEN OVER LUBED AROUND THE PISTON SEAL