Forum Discussion

Explorer

Sep 26, 2012

Repairing fuel station pump

My pump wasn't turning on so I loosened up a couple of bolts on the gear cover panel and then it started pumping again. Wasn't leaking or anything after loosening the bolts but I investigated some more and removed the gears. I noticed that the gears had been rubbing pretty good on the cover panel so I got out some sand paper and sanded down the gears so they weren't so wide. After I put it all back together it was working pretty good at first but then slowed down and wouldn't run unless I loosened the bolts again. I plan on taking the gears out and sanding them some more to see if that fixes it up before I have to replace them but I was wondering if these plastic/rubber gears don't wind up expanding some over time while soaking in gas all the time. Any other opinions out there before I tear into it again.

Toy Haulers

34 Replies

gandude
Explorer
Sep 27, 2012
On mine,

On the cover and housing that supports the gears on the inside is a black rubber coating on the non-machined areas. This coating was breaking apart and lodging in the gear teeth preventing the motor from turning. I think the reformulated gas has something to do with it. I removed the 'blistered' coating areas and sanded the gears a few months ago. So far, so good.
SAR_Tracker
Explorer
Sep 26, 2012
My TH pump had the same problem, and I applied the same fix. Been working fine ever since. Only sand off less than 1/64" at a time....
BobWanderer
Explorer
Sep 26, 2012
The gas now days damages a lot of plastic/rubber/etc.
Going to get worse with the 15% ethanol.
I believe the pumps were not designed for the currant fuels.
jetboater454
Explorer
Sep 26, 2012
That seems to be the problem and the fix for most of the problems with the pumps.Try using a belt sander,just put it upside down,lock the power on and sand the gear a little that way.clean it and reinstall.
You would think a gear that sits in gas would be made better.:h