MS-310 Chain Lube Leaking----Need HELP!

[redbaron169]

I'm a BRAND NEW Newbie. I don't normally join forums; but I'm desperate for an answer/help with my Stihl Chainsaw Model MS-310. I was born & raised in the SE Woods of Mississippi; but I joined the Navy and after my Tour was up, moved to the Great Northwest to live, hunt, & WORK. After 20 years of cutting Firewood with a Husky Chainsaw, I moved back Way Down South and was advised to purchase a REAL chainsaw....a STIHL. I was further advised that in order to enjoy trouble free continuous use of my Stihl, I should take it to a Stihl Authorized Dealer and have it annually serviced. I will honestly admit, I have a problem letting other folks work on any of my equipment; but upon the insistence of my oldest son, I relented this year (he volunteered to pay). I just started to cut some additional firewood for our Southern MS winter needs and discovered that the Chain is not getting any lubrication. Upon further detailed troubleshooting/investigation, I discovered all my Chain Lube Oil was coming out the front of my Stihl. (Lots of oil) As most of you longtime Stihl Owners know, Stihl is "Stingy" with the Maintenance info they make available! I have attached a pic of the hole where the Chain Lube is pouring out of.
I said all the above to ask this; "Can anyone please advise if there is something supposed to be in this hole? and if so, can you tell me what the part # is?"
Very Respectfully,
The NEW Newbie

P.S. First thing I did was REPLACE the Oil Pump Assembly & all Hoses--Still Leaks out same Hole, shown in attached Photo.

 

[mechanic mark]

http://thebakeliteradio.com/sawspares.com/Stihl MS310 Service Manual.pdf check out page 9

 

[redbaron169]

http://thebakeliteradio.com/sawspares.com/Stihl MS310 Service Manual.pdf check out page 9

Thanks for the prompt reply Mark!
I have already performed all the items listed on page 9---All NEW---Chain Lube is still being pumped out the front of the SAW, from the hole shown in the attached photo.
Does something belong in that hole?

 

[bertsmobile1]

Thanks for the prompt reply Mark!
I have already performed all the items listed on page 9---All NEW---Chain Lube is still being pumped out the front of the SAW, from the hole shown in the attached photo.
Does something belong in that hole?

Well Mark has sen you the service manual, I shall attempt to do the parts book.
There does not seem to be anything listed for that hole.
It could be a machining hole used to make the hole for the elbow and if that is the case a blanking plug should be in there.
However the seal between the pump & the elbow should be oil tight as should be the joint between it and the outlet to the bar.

View attachment MS 310 parts.pdf

Please only read the the document on your computer as you can see it is not allowed to be printed and the Stilh fairy will pot a spell on your saw & it will for ever more run backwards.

 

[ILENGINE]

I would say there is suppose to be a ball bearing pressed in that hole, and it came out. May not be a separate part. You may have to find something that fits.

 

[redbaron169]

Well Mark has sen you the service manual, I shall attempt to do the parts book.
There does not seem to be anything listed for that hole.
It could be a machining hole used to make the hole for the elbow and if that is the case a blanking plug should be in there.
However the seal between the pump & the elbow should be oil tight as should be the joint between it and the outlet to the bar.

View attachment 24486

Please only read the the document on your computer as you can see it is not allowed to be printed and the Stilh fairy will pot a spell on your saw & it will for ever more run backwards.

Thanks!....I think they already put a SPELL on my SAW.......I should have kept my HUSKY.....I just got tired of hearing all my Southern Stihl owner Friends telling me I should "GIT a REAL SAW".
Maybe one of them will let me look at his STIHL. Hopefully I can see if there's really something missing where the HOLE is.....?

 

[mechanic mark]

Thanks for the prompt reply Mark!
I have already performed all the items listed on page 9---All NEW---Chain Lube is still being pumped out the front of the SAW, from the hole shown in the attached photo.
Does something belong in that hole?

Read pages 60 & 61 pickup body/suction hose, also How to Repair the Oiler on a Stihl Chainsaw | eHow

 

[redbaron169]

Thanks for the prompt reply Mark!
I have already performed all the items listed on page 9---All NEW---Chain Lube is still being pumped out the front of the SAW, from the hole shown in the attached photo.
Does something belong in that hole?

One of my Buddies sent a photo of his MS-310....See attached......Do you know if there is a STIHL Part # for this?

This ORANGE THINGY is missing off my Stihl; and all my Chain Lube is being pumped out this hole!

 

[d_sharier]

I don't believe it does. I think it is a one-way, duck bill valve that is press fitted into the case. You may be able to match one up and fit it in. They are used in a lot of gas caps on 2 cycle equipment. I will look though all the IPL's I have for Stihl, but don't believe I have seen that as an individual part.

 

[d_sharier]

I lied, not a vent, but rather a plug.


Try: To replace you can use a grub screw, part number 9134 381 1230. On installation use Red Loctite 262 on the threads. Leave approx 1.5mm of the head of the screw exposed above the surface of the housing.