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Weak Hydro pump

#1

H

Hopper1

I just bought a 2000,928D2, 1100hrs. It is weak on the right side, it seems to drive straight but turning forward or reverse is very weak. Is there any way to check oil pressure? Any ideas?


#2

Sprinkler Buddy

Sprinkler Buddy

Hopper1 said:
I just bought a 2000,928D2, 1100hrs. It is weak on the right side, it seems to drive straight but turning forward or reverse is very weak. Is there any way to check oil pressure? Any ideas?
Click to expand...

Bearings wear out in Hydro Pumps, you can get them rebuilt if you don't wait until it goes out completely. When they go out completely they sometimes will crack the housing. If the housing cracks your buying a new one. If you get it rebuilt, make sure they or you flush all lines out completely pror to installing the Hydro Pump back.

Take it to a professional to rebuild, lot of small parts that have to be in their right place. Should be able to get it done for 1/2 the cost of a new one if not better.

Hope that helps!


#3

H

Hopper1

Sprinkler Buddy said:
Bearings wear out in Hydro Pumps, you can get them rebuilt if you don't wait until it goes out completely. When they go out completely they sometimes will crack the housing. If the housing cracks your buying a new one. If you get it rebuilt, make sure they or you flush all lines out completely pror to installing the Hydro Pump back.

Take it to a professional to rebuild, lot of small parts that have to be in their right place. Should be able to get it done for 1/2 the cost of a new one if not better.

Hope that helps!
Click to expand...

If the bearings are bad, is the OIL pressure low?


#4

K

KennyV

Hopper1 said:
If the bearings are bad, is the OIL pressure low?
Click to expand...

I wouldn't suspect bearings.... My bet would be on internal seals leaking ... seams like CajunCub has commented on resealing these pumps...
He should be along any time, with some first hand info... :smile:KennyV
BTW... welcome to LMF...:smile:


#5

CajunCub

CajunCub

Low pressure in these hydro pumps can be fixed "IF", your willing do the work. Basically, you take it all apart and clean everything, reseal it, then replace the fluid with the OEM recommended stuff. These pumps only fail because the fluid brakes down into mudd. They are full of springs & balls then disc/clutches, I have done them and they would work like new again. Get ready for some intense assembling, but no special tools are needed. If you have never done one just keep a camera beside you and photo everything to refer back if you get jammed up. Good Luck, PM if you need more help.


#6

Sprinkler Buddy

Sprinkler Buddy

KennyV said:
I wouldn't suspect bearings.... My bet would be on internal seals leaking ... seams like CajunCub has commented on resealing these pumps...
He should be along any time, with some first hand info... :smile:KennyV
BTW... welcome to LMF...:smile:
Click to expand...

Bearings arn't out yet, if they were you would be going no where but a circle. Seals and bearings all will be replaced in the rebuild. A seal will often go first, that causes the bearing to. I had this problem in the past. My mechanic told me it's not uncommon at the 1100 to 1500 hr mark. That is a lot of hrs on a mower.

I wouldn't be surprised if the previous owner knew about this and decided to just get new equipment to avoid downtime posibly. It's not that big of deal, get it rebuilt and you'll have a good operating mower.


#7

H

Hopper1

CajunCub said:
Low pressure in these hydro pumps can be fixed "IF", your willing do the work. Basically, you take it all apart and clean everything, reseal it, then replace the fluid with the OEM recommended stuff. These pumps only fail because the fluid brakes down into mudd. They are full of springs & balls then disc/clutches, I have done them and they would work like new again. Get ready for some intense assembling, but no special tools are needed. If you have never done one just keep a camera beside you and photo everything to refer back if you get jammed up. Good Luck, PM if you need more help.
Click to expand...

where do I get seals?


#8

CajunCub

CajunCub

We have a Grasshopper dealer here, don't know if they have a web page...but, it's South Circle Tractor in Alexandria, Louisiana.


#9

Sprinkler Buddy

Sprinkler Buddy

Hopper1 said:
where do I get seals?
Click to expand...

If you can't get them from a local mower shop, you probably have a hydrolic shop near you. They usually work on the big stuff, front end loaders, etc... but they should still be able to get you what you need. When I had one go out, the oil still looked new. Take a flash light and look in hydrolic reservoir, look for metal flakes and metal gold dust. Bet you will see some more than likely. Flush it out too!


#10

173abn

173abn

Look for a place where you live that sell Grasshopper or don't know where you are in Oklahoma but Grasshopper is located in Moundridge ,Kansas phone #is 316-345-8621.They also have a web site...russ


#11

H

Hopper1

Hopper1 said:
I just bought a 2000,928D2, 1100hrs. It is weak on the right side, it seems to drive straight but turning forward or reverse is very weak. Is there any way to check oil pressure? Any ideas?
Click to expand...

Update....Right pump is ok. Idler on R side was binding up, needed new brass bushings. Apparently it was not keeping pump drive belt tight enough. After changing the Hyd filter, now it seems to be on the left side, low power. I think it has air in the pump now. It was not there before. There is a allen plug on top od each pump. Is that to let air out of each motor? Help again.


#12

I

ingqman

I have a 618 with the same problem, I took it all apart and found nothing wrong, I do have a leak somewhere but I cannot find it. The mower has 1200hrs on it, but I have only had it for three weeks now. I am going to take the pump into the local dealer tomorrow and ask to have it rebuilt.


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