I replaced the old spring in Diana 35 with a new one and lubed metals with Moly grease and piston seal with silicon oil. Find that there is buzzing and jarr after firing. What did I do wrong ? Or is it that I have to live with a certain amount of Buzz/jarring/vibration ?
do you have some heavy tar from JM? a light coat on the spring might dampen the vibration. some HT on the guide can help too. other issues sound like piston slam and may be indicative of a bad breach seal or piston seal.
I've been told the JM R6 spring is a good replacement, tho I have never compared dimensions.
I had similar results after a tune. My gun is smoother with proper lubes and Old Skool buttons on the piston. There still is some spring buzz present, enough to be noticeable. It is a metal guide and that usually means more noise.
As the other posters metioned making the spring fit the guide better usually helps. Some shrink wrap on the rear guide might can increase OD a bit.
It is a long spring and corresponding stroke so I think a tophat would really help too.
A custom synthetic guide and tophat would be my preference over the stock metal one.
Did the main seal need any attention? If the leather is dry the seal is likely dried up and not doing its job as well as it could.
My gun is hella accurate and easy to shoot all day long.
I bought an almost brand new .177 Diana 35 2 years ago, and it always shot very well, arround 765 fps with a 7,5 gr pellet, but always with a little "twanng". According to what I read about this gun, the 35 tends to be twanngy, at least compared with his modern brothers, the 34 and 36.
Then I put Jim Maccari´s Velocity Tar Grease in its spring and guide, but the problem persist, so I had to put a bigger amount to obtain results, BUT then I lost a lot of velocity. So I took away this grease.
Being the 35 a classic and a sweet gun to shoot, I talk with Steve Pope in England ( Venom), who did a miracle in my HW 80 with the V-glide kit ( I must use FTT pellets in it )and ask him to put a new spring and guide set. The high quality of the products of Mr Pope will guarantee that your 35 will shoot smooth and free of vibrations.
Teo
Guru's
I replaced the old spring in Diana 35 with a new one and lubed metals with Moly grease and piston seal with silicon oil. Find that there is buzzing and jarr after firing. What did I do wrong ? Or is it that I have to live with a certain amount of Buzz/jarring/vibration ?
The spring was gifted to me by a friend along with a seal (synthetic leather)and both are Diana spares. I had read about the D35 being twangy. But I guess I did things right this time round by stripping, cleaning and relubing with local make moly grease and it shoots smoothly with a thud but no after shot jarring or vibrations.
JM springs are realy nice and are sought after here.
I'd be willing to invest in an appropriate JM spring for the D35 (which one should I go for ?) and even the mach kit if its not too expensive. I paid the equivalent of USD 300/- for this April 1968 beauty and the shipping cost kills but hey...she is my son's favourite.
One problem is JM's site is very slow from my net connection. an alternative source would be nice. The top hat and guide, I can have it locally made once I get the spring.
765fps is a good figure, is that with the blue Diana synthetic seal ?
