Walker MDD having issues on Hills -- Help

pjmjr

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Jul 11, 2021
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I have a 1999 MDDGHS, about 2000hours, I recently moved from a property that was basically flat to a large 3.2 acre lot with 15 to 18 degree hills.
The problem is a either loose traction climbing, (tires spin) or the machine just slows down and stops in the middle of the hill.
When it stops I back off all the way on the forward speed control and then slowly begin moving forward and it begins going up the hill again.
Occasionally I screeching noise and I am not sure if that is a belt slipping or a pump making noise.
I have replaced all the belts, changed fluids both pumps with 15W-50 Mobil1.
The jack shaft belt seems to bounce a lot, I replaced the idler pulley which did not resolve the issue.
I also purchased a new belt #7231 and it does not fit. My current belt is a 3VX355 which looks to be about 2 inches bigger then the 3VX335.
I purchased this machine used so I do not know exactly what has been done to it. The Jackshaft pully measures 3-1/4" in diameter which from
my research does not appear to be correct.

What is the correct size Jackshaft pully for this machine?
Are my Hydro pumps going bad?
Do I need to replace them?

The machine runs good, and I do mow sideways on the hill with no issues, but there are times when I have to go up the hill, and I do not seem to have the power.
 

pjmjr

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I have spent a lot of time doing google searches and learned a lot BUT could not find any facts for my mower model.
I was hoping to learn something from another Walker mower owner.
 

bertsmobile1

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Nov 29, 2014
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Walker have all of their owners manuals, spares manual and parts books on line for free.
Mark gave you the link in post #2
What more do you want ?
Walker have one of the best customer service departments in the USA
they are a family owed company and very proud of their products and will shift heaven & earth to help you.
Give them a ring
Be polite.
 

pjmjr

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They might have Best Customer service IF you can get a person on the phone.
I have been trying since Monday, have not spoken to a person yet.
We keep playing phone tag.
I cannot sit in the office 4 to 5 hours waiting for a call back, not sure who can??
 

bertsmobile1

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Being in OZ I naturally use emails
Always answered in a day or two
 

footballfan33

Member
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Jul 10, 2019
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Walker have all of their owners manuals, spares manual and parts books on line for free.
Mark gave you the link in post #2
What more do you want ?
Walker have one of the best customer service departments in the USA
they are a family owed company and very proud of their products and will shift heaven & earth to help you.
Give them a ring
Be polite.
I agree. Based on my experience, at least the greater Texas parts distributor has 2 amazing women working for them.
 
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