Broadmoor 717 Transmission Slip

[mbezzlr 0]

Hi All,

I'm in need of some transmission help. I have the 2 speed transmission w/o hi-lo on a 717 990425. Recently, it started feeling like I was getting kicked in the rear end while mowing, especially while turning. It quickly got a lot worse, to the point where the transmission is definitely slipping. Is there a common point of failure in this transmission? Is it worth pulling apart to replace what may be broken? Any ideas on what may be broken/worn and whether I would be able to find a new one?

Thank-you!

[Simplicity7013H 95]

Hello, I think that one of the gears inside the transmission must be stripped out. All you can do is to take it apart and see what is the matter inside. I have put links to manuals for the tractor. Hope this helps!

Parts Manual:

http://bsintek.basco.com/BriggsDocumentDisplay/heCBEN8.wMYrE3Cwa5kbp796Dq.pdf

Owners/Operaters Manual:

http://bsintek.basco.com/BriggsDocumentDisplay/heCBEN8auG3rE3Cwa5kbp796Dq.pdf

[goatfarmer 817]

Sure it's not a bad belt, or out of adjustment?

[mbezzlr 0]

I just replaced the belt as it was one of my suspicions, and that didn't solve it. The belt does appear that be engaging properly, but I will look into it a little more.

[steve-wis 637]

Two things I would suggest. First, are you sure you didn't shear off the pin that goes thru the rear rim and axle shaft on one side? I had this happen once and it would catch and drive for a while, but then start to slip, usually when turning. If this isn't it, I would go ahead and pull the tranny and split it. They are fairly simple to work on. If you do split it, be careful as you open the two halves that you don't lose any of the thin shims that go on the shafts. The book does show where they all go, but it is a bit hard to tell them apart and there is more than one kind of shim. Any damage should be very apparent. Parts can be found on ebay off and on, or a replacement or parts transmission should be easy enough to find.

Steve

[mbezzlr 0]

Thank-you to everyone who has contributed. I really appreciate the assistance.

For a quick update, I pulled the transmission tonight...but don't have a garage or even pavement to sit on while working, so I'm going to head into work early tomorrow and tear it apart in the shop there. When I drained the fluid this evening, it was definitely sparkly. I'll let you know what I find.

I did check the shear pins, and they were not the culprit. However, when I pulled the right rear wheel off the axle shaft, a relatively small chunk of axle fell out of the tube. It came from the thru-hole area where the shear pin goes. Not the smoking gun, but also not a great sign.

[mbezzlr 0]

Bringing this to a resolution here. I pulled the transmission apart and found that one of the four bolts (part number 34 on page 20 of the manual linked above) was snapped in half, allowing the gears to wander off course in a diagonal fashion. This caused the two nearby differential spacers (part 29) to get chewed up. FYI, those spacers are sleeve bearings from what I can tell. 5/8" inner diameter, 7/8" OD, 1/2" long/tall.

I replaced the broken bolt, the two spacers, put it back together, and she's golden. Yes, there is some extra wear on the gears, but this will get me by for now.

Thanks again for your help!

[steve-wis 637]

Glad it worked out for you. As you saw, these transmissions are really pretty simple to work on. If the gears are not worn too badly, I would wager you will get many years of use out of it. One thing I have found is that on the older, more warn transmissions, it helps to be a bit more gentle when shifting them, the linkages get worn and tired and will break or jam if abused.

good luck with the tractor!

Steve