JD Sabre hydro transmission - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
Register Home FAQ Garage MTF Gallery Search Today's Posts Mark Forums Read Store Chat Room

John Deere Forum John Deere Garden Tractor talk

Reply
 
Thread Tools Display Modes
Old 08-23-2009, 10:04 AM   post #1 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default JD Sabre hydro transmission

I have an 11 year old Sabre with a K51A Hydro transmission I am having issues with.
1. It is stuck in neutral and will not go into either forward or reverse.
2. The rear wheels are locked up and will not move, regardless of the position of the transport mode knob or the brakes.
3. If the rear wheels are not in contact with the ground, they turn easily.
I have removed the drive belt and cleared all debris from the underside, no change.
Anyone have any idea on how I should proceed?
Misha57 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-23-2009, 10:39 AM   post #2 of 20
KHodges
AKA Moses Lawnagan
 
KHodges's Avatar
 
Join Date: Mar 2009
Location: Newton, NC
Posts: 3,559
MTF Member # 23296
Images: 6
Default Re: JD Sabre hydro transmission

Has it been sitting unused for a while, or has this happened suddenly while in use, or gradually while in use?

Does the HST whine (normal sound) when you press either direction pedal?

You say the rear wheels are locked up, but then say they turn freely when off the ground. When you turn one wheel, does the other one turn also, and in the opposite, or same, direction?

When was the last time the HST fluid was changed? Any chance water has gotten into the HST?

If you start it up, does the input shaft spin (the one with the belt from the engine?)and does the belt screech like it's slipping?

I really don't have a clue as to the problem, but answers to these questions might help those who are more HST-savvy.
__________________
Proud owner of :
'08 JD X748SE, 54C deck
3-pt hitch, rear PTO
Power Flow and MC519 cart
LP RTR0550 rototiller
?? 60" box blade
Simplicity 10" plow adapted to 3-pt hitch
45 FEL

'02 JD GT235, 48C deck

'86 JD 214, 46" deck

I've always had a problem with kleptomania.
When it gets really bad, I take something for it.
KHodges is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 11:42 AM   post #3 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

Thank you for responding,
-------------------------------------------------------------------------
Has it been sitting unused for a while, or has this happened suddenly while in use, or gradually while in use?

A: Used every weekend. Two months ago went into the dealer for it's annual "tuneup". This happened suddenly, while in use. Wasn't easy to get it back to the garage. Oddly, the only way to get it into gear and keep it there, was to ride the brake heavily while driving. It drove very slowly and I stopped several times in the hopes of preventing further damage to anything.
--------------------------------------------------------------------------
Does the HST whine (normal sound) when you press either direction pedal?

A: Not sure what you mean by direction pedal. Yes it did whine when trying to move the gearshift.
-------------------------------------------------------------------------
You say the rear wheels are locked up, but then say they turn freely when off the ground. When you turn one wheel, does the other one turn also, and in the opposite, or same, direction?

A:They turn in the opposite direction.-

When was the last time the HST fluid was changed? Any chance water has gotten into the HST?

To my knowledge the trans fluid has never been changed. According to the manual, looks like the trans has to be dropped to perform this.

The tractor is always garaged so I would think it doubtful water got in there.
-------------------------------------------------------------------------
If you start it up, does the input shaft spin (the one with the belt from the engine?)and does the belt screech like it's slipping?

I am re-attaching the drive belt and refilling the oil as I had it on it's side to work on but there was no screeching noise. I will recheck this post once I have it running again.
Thanks,
__________________________________________________ _______________
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:32 PM   post #4 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

Quote:
Originally Posted by KHodges View Post
Has it been sitting unused for a while, or has this happened suddenly while in use, or gradually while in use?

Does the HST whine (normal sound) when you press either direction pedal?

You say the rear wheels are locked up, but then say they turn freely when off the ground. When you turn one wheel, does the other one turn also, and in the opposite, or same, direction?

When was the last time the HST fluid was changed? Any chance water has gotten into the HST?
__________________________________________________ _____________
If you start it up, does the input shaft spin (the one with the belt from the engine?)and does the belt screech like it's slipping?

The input shaft does spin and there are no screeching noises.
__________________________________________________ _____________
I really don't have a clue as to the problem, but answers to these questions might help those who are more HST-savvy.
In answer to the last question, the input shaft does spin and there are no screeching noises. The transmission just refuses to go into gear.
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:43 PM   post #5 of 20
stint9
Senior MTF Member
 
stint9's Avatar
 
Join Date: Aug 2009
Location: nj
Posts: 156
MTF Member # 31189
Default Re: JD Sabre hydro transmission

There are usually 2 problems with JD Hydro:
1) Pulley (Sheave) on input shaft strips out. Check if any looseness or play.
2) Hydro frys itself because not intended for long duration or strenuous up hill mowing for long periods, especially if fan/shrouds clog with grass accumulations.

If 11 years old with original oil, suspect usual carbon deposits formed, scored precision parts, and now cannot develop high oil pressure needed to function
stint9 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:46 PM   post #6 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

If that is the case, is it worth trying to repair, or have repaired or am I better off replacing the hydro?
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:48 PM   post #7 of 20
davidg
The Travelin' Mod
 
davidg's Avatar
 
Join Date: Nov 2005
Location: MS
Posts: 20,157
MTF Member # 807
Images: 2
Default Re: JD Sabre hydro transmission



sounds liek you got some good advice on what to check.


BTW, most of the time water gets in due to condensation. no need to be out in the rain/forging streams.
__________________
Check out our new HOMEPAGE


davidg is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:55 PM   post #8 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

I agree, it's better than I got from the manual. Guess I will have to see what a rebuild kit goes for.
Can't understand why the designers made it so difficult to change the oil other than to make money.
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 12:55 PM   post #9 of 20
stint9
Senior MTF Member
 
stint9's Avatar
 
Join Date: Aug 2009
Location: nj
Posts: 156
MTF Member # 31189
Default Re: JD Sabre hydro transmission

A new Hydro from dealer will cost you about $1,000 plus freight and labor if you want them to install.

Used units sometimes on E-Bay for much less.

Seldom "repaired" if in fact fried, because precision pumps inside often cost over $700

Before giving up, check if an oil change will help..not easy to do but lots cheaper to try.

Most hydro manufacturers now suggest 5w50 synthetic rather than original 10W30
stint9 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 01:00 PM   post #10 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

Preparing to drop the HST now and give it a shot. At least no problem with getting oil on a Sunday.

My thanks to those that have replied and if anyone else thinks of anything, I will be checking this throughout the day.
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 01:10 PM   post #11 of 20
stint9
Senior MTF Member
 
stint9's Avatar
 
Join Date: Aug 2009
Location: nj
Posts: 156
MTF Member # 31189
Default Re: JD Sabre hydro transmission

Probably will have to turn upside down to dump out of fill hole if this is te Tuff Torq K-55 I suspect.

If oil looks black,thin,and smells 'burnt' suspect.... Fry $$$

When draining watch how much comes out and use that amount for initial re-fill

Follow procedure carefully to bleed air after re-fill before concluding no-go.
stint9 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 01:18 PM   post #12 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

Info on transaxle sez Tuff Torq K51A, Next few posts may be to recommend a better tractor/mower that the average Joe like me can actually work on. Not sure after this it will be a JD but everyone has their issues I'm sure.

Again, my hearty thanks
Misha57 is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 01:25 PM   post #13 of 20
davidg
The Travelin' Mod
 
davidg's Avatar
 
Join Date: Nov 2005
Location: MS
Posts: 20,157
MTF Member # 807
Images: 2
Default Re: JD Sabre hydro transmission

it is an 11 year old mower with original oil in the hydro, what more can you ask? even if it was a 20,000.00 machien that is asking for trouble. i don't fault the machine here, it has served it's purpose and got a reasonable life. if you want a machien tha tlasts longer than 10 years or so, find one with a serviceable hydro and then follow the service schedule.

how many hours are on this machine anyway?
__________________
Check out our new HOMEPAGE


davidg is offline   Reply With Quote Quick reply to this message
Old 08-23-2009, 01:55 PM   post #14 of 20
Misha57
MTF Junior Poster
 
Join Date: Aug 2009
Location: New Hampshire
Posts: 11
MTF Member # 31376
Default Re: JD Sabre hydro transmission

I have no idea of the hours as it was purchased by my fiance's ex-husband. As to my comment on who to buy next time, I am quite happy with the unit overall and the engine, B&S Vanguard 16 HP, is still going strong.

My comment was directed as to engineering for ease of maintenance. I am an engineer and it pains me to see poor design like this. As a general statement, equipment would last much longer if it is easier to service, it's just far more likely to get done.

BTW, there is no service interval stated, that I could find, on changing the oil on the transaxle. Hindsight tells me that is not possible so shame on me for that.

Thanks again!!!!
Misha57 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-23-2009, 02:03 PM   post #15 of 20
davidg
The Travelin' Mod
 
davidg's Avatar
 
Join Date: Nov 2005
Location: MS
Posts: 20,157
MTF Member # 807
Images: 2
Default Re: JD Sabre hydro transmission

yeah, entry level machines, and some of the lower end "dealer" class from many vendors do not have a maint schedule for the tranny. commons sense tells you that it needs to be done, but they say the trannies should outlast the machine. that right there tells you that the machien is designed with a limited life expectancy. this goes for most any manufacturer!
__________________
Check out our new HOMEPAGE


davidg is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:19 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Compact Tractor Reviews Tractor Reviews Snowblowers Lawn Mower Forum
My Tractor Forum Snow Thrower Power Equipment Forum
Combine Forum Snowblower Forum ATV and UTV Reviews