2007 Exmark Lazer Z HP 50" with bad stick (hydraulic problem) (new member)

[Kman91]

I just bought a Lazer Z HP used with something around 800 hours on it. One side is sluggish and has little power, the other side is great.

I've checked the bypass valves, and the pulley, hoping for a cheap fix, but I don't think that's the problem.

I notice that the left side is very responsive, but the right side, I must move the stick a large amount before it moves. On hills it sometimes doesn't have enough power even to get up on that side at full throttle, but it does seem to be loading the engine more than if I move the other stick the same amount.

I found out that the pump is a Hydro Gear BDP-10A, but I can't find any info on the wheel motor other than it's a 1 1/4" tapered shaft Parker/Ross. I'll probably try to rebuild whichever one is bad.

To me, this seems like it may be a wheel motor (since it loads the engine a lot), but while I"m a very handy guy, I'm fairly new to hydraulic systems.

Does anyone have any ideas? Thanks!

I'm a new member, just signed up today, and it asked me if I had a question, so here it is. I hope I can help some of you with your questions too someday. Thanks for reading!

 

[tanman34fl]

Kman, I am having the same problem with my walker mower. I havent had time to check mine outthoroughly yet. Figured I would join here and search around for a quick answer. But so far no luck with that. I will be checking out mine in the next few days. If I find the answer I let you know.
Good luck!!!

 

[chance123]

I would almost be willing to bet that the linkage arm that is on the pump has come loose and is creating play and not giving you full linkage travel. I've seen this happen a thousand times. You will need a 5/16" wrench or a 12 point socket for the square set screw that holds this linkage arm tight onto the pump. They are kind of hard to reach and is easier done with the wheel removed.