09 800 motor, oil pump cam arm sticking

sledbilly · Feb 7, 2009

MY FIX BELOW , 09 800 motor, oil pump cam arm sticking

anyone else experiencing loading with oil at idle, slow speed

the oil pump cam arm does not always fully return when you close the throttle. It looks like the cam might be tight against the post that holds the return spring tail and there is just enough friction that the return spring cannot overcome and close fully. Also, the return spring sort of sits there cockeyed and one wind is up against the cam which also may create enough friction that the spring cannot overcome. might be a casting problem too.

you can see the operation of the cam from the topside.

anybody got a fix? we have a warm spell coming and I want to get this fixed. my oil use is ridiculous and it just sucks when the sled loads up at idle or slow speed. blipping the throttle sometimes gets the cam to fully return but many times does not...doesn't matter whether you let the throttle snap back or let it off gently. Strange 'cause it doesn't hang all the time.B

bones1075 · Feb 7, 2009

Mine does the same thing.

sledbilly · Feb 7, 2009

bones1075 said:
Mine does the same thing.

suggestion over on hcs to wind return spring tighter 1 turn. may tear into this tommorrow.

black swan · Feb 7, 2009

400miles

my 09 m8 sp just had the oil pump replaced, yesterday.

mine was sticking 3/4 open and no return. Winding the spring and entire turn will be near impossible. we loosened the linkage and it still sticks. Found it when i noticed oil blowing by the y-pipe and splashing on jugs. Pump replaced under warranty.

Otherwise, sled is flawless. NO codes, no other issues.

cat rutt · Feb 8, 2009

Just checked my sled oil lever is sticking most of the time. Then ckecked three of my budds sleds Two were sticking.All are m8

ptofnortn · Feb 8, 2009

My 09 m1000 sp does the same thing. Have to take it all apart for a bulk head this week, see if I can figure out a fix. bogs bad when it sticks.

Braaap12 · Feb 8, 2009

Just took this pic, never seen it when it wasn't sticking but does it look like its stuck half open?

bones1075 · Feb 8, 2009

Braaap12 · Feb 8, 2009

dont know what that means haha

northof40 · Feb 8, 2009

Braaap12 said:
dont know what that means haha

ttt= to the top

black swan · Feb 8, 2009

that is actually how my dealer setup my new pump. Assuming that is in the closed at-rest position. My old pump would stick at WOT, never returning.
Looks like safe position to idle, but might smoke a little=safe for the WOT pull, buddy roost!

Whats your oil ratio? Is oil blowing everywhere?

CatAttack · Feb 8, 2009

Had the oil pump sticking on my 09 M1000, dealer just replaced last week under warranty. Pump was sticking between 3/4 and 1/2 open

Rprecision · Feb 8, 2009

Has there been any discussion as to why they are sticking......recall....dealer bullitans, etc ?

On a brighter not at least they are still pumping....Rather have it that way

sledbilly · Feb 9, 2009

my fix

chere's how I fixed mine.

dealer has already looked at and agreed to replace. don't want to be down so this should work. here's what I did with a pic. the pump cam definitely hangs, you can feel it when operating by hand. can't see anything on the outside that is causing it to hang, must be a casting problem.

1. remove hood
2. remove air silencer, bungee ECU up out of the way
3. remove boot between air silencer and throttle bodies
4. you do not need to remove throttle bodies
4.5 remove oil pump arm from oil pump, some small pieces
5. the red mark in the pics is the post that carries the return spring
6. with a pair of needle nose pliers (thru the frame where boot is in #3) you can grab spring wire at post and pull spring around post thereby shortening spring. you can see the additional spring tail in the pic. had to do it a ouple times before cam would close on its own. probably shortened spring about 3/8" or so.

there is still full rotational movement of the cam. I tried to remove cam but feels like it must be pressed on shaft and wanted to try this first.

removing cam and winding spring one full turn may not allow full rotational movement of the cam.

shortening the spring this way obviously increases return force, you can feel it by hand before and after. after i shortened spring enough to get cam return every time I repeated the shortening process two times

for some reason can't upload pics. you can go here to see pics http://www.hardcoresledder.com/forums/index.php?s=&showtopic=400091&view=findpost&p=4510421

diggerdown · Feb 9, 2009

Doo had a lot of problems with this a few years ago and most of the guys just hooked a pull spring on the arm and fastened it to the bulkhead. It did add some extra thumb fatigue but at least they did'nt leave a cloud of smoke everywhere.

Rprecision · Feb 9, 2009

diggerdown said:
Doo had a lot of problems with this a few years ago and most of the guys just hooked a pull spring on the arm and fastened it to the bulkhead. It did add some extra thumb fatigue but at least they did'nt leave a cloud of smoke everywhere.

That kind of what I was thinking

Rprecision · Feb 9, 2009

sledbilly said:
chere's how I fixed mine.

dealer has already looked at and agreed to replace. don't want to be down so this should work. here's what I did with a pic. the pump cam definitely hangs, you can feel it when operating by hand. can't see anything on the outside that is causing it to hang, must be a casting problem.

1. remove hood
2. remove air silencer, bungee ECU up out of the way
3. remove boot between air silencer and throttle bodies
4. you do not need to remove throttle bodies
4.5 remove oil pump arm from oil pump, some small pieces
5. the red mark in the pics is the post that carries the return spring
6. with a pair of needle nose pliers (thru the frame where boot is in #3) you can grab spring wire at post and pull spring around post thereby shortening spring. you can see the additional spring tail in the pic. had to do it a ouple times before cam would close on its own. probably shortened spring about 3/8" or so.

there is still full rotational movement of the cam. I tried to remove cam but feels like it must be pressed on shaft and wanted to try this first.

removing cam and winding spring one full turn may not allow full rotational movement of the cam.

shortening the spring this way obviously increases return force, you can feel it by hand before and after. after i shortened spring enough to get cam return every time I repeated the shortening process two times

for some reason can't upload pics. you can go here to see pics http://www.hardcoresledder.com/forums/index.php?s=&showtopic=400091&view=findpost&p=4510421

None of your pictures worked

Braaap12 · Feb 9, 2009

I'm going to take mine to arctic cat tommorow we'll see what they say

sledbilly · Feb 9, 2009

Rprecision said:
None of your pictures worked

I use firefox and it hangs when i try to browse in the attachment section. pictures are posted on hcs but believe you need to be a member to view pics

sledbilly · Feb 9, 2009

Braaap12 said:
Just took this pic, never seen it when it wasn't sticking but does it look like its stuck half open?

looks to me like it is not closed, tap with long screwdriver to verify.

09 800 motor, oil pump cam arm sticking

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