Hello
I am new to air rifle ,but have some experience with rifles and handloading,Hunting and fair amount of feild target. I purchased a used Diana 20T01 air rifle It was advertised as a Diana 24 and 2 years old hardley used, I was ready to send it back when I seen how small it wasalso it number was 20T01.But I just had to try it The crosman match pellots about 1 inch at 10 yards, Tried some CV diabolo master and it would almost go into the same hole. Best was 12 thousands ctc and average at about 60 thousands. I am happy
Now I did oil the piston with molibneum disulfide but forgot to mix it up first so got mostly the oil and now it smokes when its fired and accuracy has dropped a bit. Does any one know where I can find parts and proper oil for the cylinder and spring etc on tyhis Diana. I live in British Columbia Canada, at Quesnel. Also what should be expected out of this gun for accuracy in the 10 yard range. Thanking you in advance for your help John

go to Jim Maccari's site and order his lube kit. has all the proper lubes.

take the gun apart again and clean out all the old lube. i use a 3/4" dowel with those blue paper shop towels wrapped around and held on with a rubber band. use that to swab out the chamber. you want all the petro based oil out of there.

put a small amount of molly behind the piston seal on the piston. small amount. it willo work its way along the cylinder wall and lube the seal as well.

i then burnish a very thin coat on the piston. thin means just a very thin transparent coat .put some more on the back edge of the piston where the stem end is. i usually burnish some into the stem. do not introduce chamber oil once you have used molly. it will mix with the oil and cause deiseling. the seal (if its a synthetic) is self lubricting. if its leather thats a whole other story. you don't use molly

the spring has a light coating of his heavy tar. not too much. i don't use the
clear tar much. on sliding compression chamber of my 52 is all.

jims web site: http://www.airguns.citymax.com/page/page/251327.htm

Hi

Thanks for the answer and quick as well,are there other lubs for the piston or should I stick with Jim maccari lube The freight is very expensive Thanks again John

thing. Jim has taken the problem of finding them away from you and made it easy. the molly is available but i don't know what is hte equivalant of heavy tar or clear tar. if you are going to own more air guns then maybe his kit is worth it. it will last a long time.

Moley 60 paste Honda pn.#08734-0001.I don't know about the heavy tar but have heard that open gear lube and the grease that is used for the hitch on 5th wheel trucks will work. I use J.M. products though.
Gary

Here's a link to a diagram of your gun:

http://www.gunspares.co.uk/showcatimage.asp?id=24367

Like the guys said, you want no ("NO!") oil in front of the piston seal. You're seeing mild problems because this is a low-compression gun.

For this gun, most any decent syn-grease should be just fine. Apply a small bead around the backside of the piston seal, coat the OD of the rear of the piston, burnish a light coat on the spring.

The key to lubrication is to use 1/2 of what you think you should, divide that by 1/3, then actually use 1/16 of what you have left.

Should be good.

Thanks for all the help fellows , I cleaned out the oil like you have sujested and low and behold shoots good again John

Just bought his kit of light/heavy tars and moly. It was $20 plus $9 shipping, his flate, minimum rate. Even at double the rate, it would only run you about $38. Been told you can do 20 - 30 guns with one of these. Maybe you have some friends with springers who can share the cost with you?

I was just window shopping at the ARH site. Domestic shipping is $9, foreign is $12. Pretty cheap for peace of mind that you are doing it right! PS - I Got just the moly and heavy tar. I let the exposed part of the breech show dark grease (econo move instead of getting clear tar...)

JC