I must be joking, right? Only springers are known for dieseling, right?
Well, there's a reasone why I ask...
Some time ago I got a Feinwerkbau 103 SSP pistol that was sold as defective and leaking.
I figured it would just need new seals.
Wrong.
To my surprise air was leaking out from an almost invisible hairline crack in the cylinder wall,
rearmost where compression would peak.
But still it held enough pressure to fire the pellet.
I see two possible explanations:
1. Overpressure from dieseling.
2. Metal fatigue from repeated compression decompression cycling or cocking.
Observations:
I found no evidence of dieseling inside the gun, all looks nice and clean.
The gun is in very good condition with no signs of abuse.
The compression cylinder is made of aluminum and has a hexagonal shape on the outside.
Thinnest parts of the cylinder walls are no more than a millimetre thick.
Normally I wouldn't think of dieseling in an SSP but the manual is very clear about it:
"
When cocking your air-pistol, a very high
pressure will be produced in the
compression chamber, which may
considerably increase the temperature of
the gas resp. air for a short time.
If there are still residues of weapon oil or
oil mist in the compression chamber,
the may become inflamed and result
in a recoil of the cocking lever, which can
then cause injuries to the shooter and
damage to the weapon.
For all moveable part and also for the
outside conservation you must
therefore exclusively use our FEIN-
WERKBAU special grease, which is
suitable for high pressures.
"
Anyway, I swapped out the cylinder for a new one and it's working perfectly.
Well, there's a reasone why I ask...
Some time ago I got a Feinwerkbau 103 SSP pistol that was sold as defective and leaking.
I figured it would just need new seals.
Wrong.
To my surprise air was leaking out from an almost invisible hairline crack in the cylinder wall,
rearmost where compression would peak.
But still it held enough pressure to fire the pellet.
I see two possible explanations:
1. Overpressure from dieseling.
2. Metal fatigue from repeated compression decompression cycling or cocking.
Observations:
I found no evidence of dieseling inside the gun, all looks nice and clean.
The gun is in very good condition with no signs of abuse.
The compression cylinder is made of aluminum and has a hexagonal shape on the outside.
Thinnest parts of the cylinder walls are no more than a millimetre thick.
Normally I wouldn't think of dieseling in an SSP but the manual is very clear about it:
"
When cocking your air-pistol, a very high
pressure will be produced in the
compression chamber, which may
considerably increase the temperature of
the gas resp. air for a short time.
If there are still residues of weapon oil or
oil mist in the compression chamber,
the may become inflamed and result
in a recoil of the cocking lever, which can
then cause injuries to the shooter and
damage to the weapon.
For all moveable part and also for the
outside conservation you must
therefore exclusively use our FEIN-
WERKBAU special grease, which is
suitable for high pressures.
"
Anyway, I swapped out the cylinder for a new one and it's working perfectly.