Oil pump question - Snowmobile Forum: Your #1 Snowmobile Forum

mhibby28 · 12-31-2012, 05:29 PM

I have a 700 xc sp and I just caused myself some grief. I'll spare you a lot of reading in describing how I did it, it's a long story that begins with a broken pull rope.

Anyway, my problem is that I have broken the machined ring that surrounds the oil pump drive shaft. It is a machined part of the pump housing itself and I don't believe it has any functional purpose related to actual driving / pumping of oil, I think it simply holds the pump concentric in the bore of the recoil cover. The pump drive shaft still turns nice and smooth and I can place the ring back in the exact location it was when it broke and nothing interferes. My question is...how serious of a risk am I taking if I try to hold the ring in place with some sort of bonding agent and put the pump back in and run it? My guess is that if the bond doesn't hold, even though the bolts should hold things pretth stable, there would be some vibration on the drive shaft which could cause the shaft seal to leak? I don't know, I'm curious what others thoughts are. A new oil pump will run close to $200 which i would like to avoid if possible but not at the risk of more serious damage.

**BC_Dan** · 12-31-2012, 05:43 PM

The oil pump is one place I wouldn't skimp on. It may work fine, if it doesn't, you get to replace a couple of cylinders and pistons. And you get to walk (or worse, get towed back by a Cat!)

I wouldn't take the chance if it were mine. You can probably find one used for a lot less money from a salvage yard such as Als Snowmobile Warehouse.

Al's Snowmobile Parts Warehouse - Snowmobile Parts, Snowmobile Parts, and More Snowmobile Parts

mhibby28 · 01-02-2013, 10:58 AM

Thanks Dan. I think I agree with you and am going to get a new pump. Wife isn't happy about it, but being towed by a Cat is not acceptable! LOL!

Follow up question, for anyone familiar with these pumps, which I think were the same on all 03-05 700 and 800 engines. When I get the new pump is the adjustment the same as what I have read for other sleds where there are two lines on the housing and one on the lever and the lines should line up at idle and full throttle?

**BC_Dan** · 01-02-2013, 08:37 PM

Adjusting is similar to other pumps. Some had a line for idle and for WOT to match up, some just had one line. Either way, if they line up, you are good to go.

I always recommend any time a pump is replaced to mix the first tank of gas with oil at 50:1 just to make SURE the pump is working. Stuff happens, you don't want to squeak a piston on that first ride! You do that and your wife will REALLY be unhappy!!

Also, after bleeding the pump, hold the lever wide open for a bit as the engine is idling, that will purge any air that still may remain in the system.

BTW, welcome to the forum!