MX5100 HST will not travel

TLP

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Equipment
MX5100 HST
Mar 27, 2023
6
1
3
Ocean Springs MS
I just bought a used MX5100 hst. I was driving it across the yard everything operating like it should. I turned it off for about 10 minutes started it back up and it will not move. I am looking for a service manual and any suggestions to check.
 

ken erickson

Well-known member

Equipment
B7100 hst, 2650 front mount snowblower, L2501 hst qa loader
Nov 21, 2010
676
962
93
Waupaca Wisconsin
My first inclination would be to check I did not “bump” the high , medium, low shift lever to one of the neutral positions.
 
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TLP

New member

Equipment
MX5100 HST
Mar 27, 2023
6
1
3
Ocean Springs MS
My first inclination would be to check I did not “bump” the high , medium, low shift lever to one of the neutral positions.
I have checked that. I tried it in all three positions. I know it seems like it would be something like that. I'm open to any suggestions. Thanks!
 
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ken erickson

Well-known member

Equipment
B7100 hst, 2650 front mount snowblower, L2501 hst qa loader
Nov 21, 2010
676
962
93
Waupaca Wisconsin
I have checked that. I tried it in all three positions. I know it seems like it would be something like that. I'm open to any suggestions. Thanks!
Silly question , the clutch pedal is not not locked in the down position?

Ruling those out, when the treadle pedal is depressed is there any indication at all the tractor is attempting to move or a change in engine rpm or hst tone? Have you verified the hydraulic oil level?
 

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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Sandpoint, ID
Fluid level?
Brake set?
Range engaging?
Range linkage?
HST Pedal linkage?
 
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TLP

New member

Equipment
MX5100 HST
Mar 27, 2023
6
1
3
Ocean Springs MS
Fluid level?
Brake set?
Range engaging?
Range linkage?
HST Pedal linkage?
Yes checked all these. I also made sure the actual shafts that the linkages are attached to are turning. I broke loose the line that appears to be coming from the charge pump going to the directional controller. I did have what appears to be good flow. I am going to pick up a gauge to test pressures. Just not sure which plugs are the test ports. It just seems I’m missing something or overlooked something
 

ferguson

Active member

Equipment
L3130
Jan 19, 2022
242
85
28
w.v.
Had & a HST failure on my L3130 / lots of reresearch three dif. dealers & head Mechanics / ended up putting a used trens. baught on line / If you have checked all of the above feadback items /oil deain & cut filters open if you have bronze that will tell you its in the HST pump or drive
 

TLP

New member

Equipment
MX5100 HST
Mar 27, 2023
6
1
3
Ocean Springs MS
Had & a HST failure on my L3130 / lots of reresearch three dif. dealers & head Mechanics / ended up putting a used trens. baught on line / If you have checked all of the above feadback items /oil deain & cut filters open if you have bronze that will tell you its in the HST pump or drive
I’m hoping it’s not that. I worked on hydrostatic pumps in the past. It’s been a minute. Usually you can hear them whining. This acts like it’s lost the charge pressure or something silly like a linkage come loose. I’m going to pull the floor pan tomorrow and get a better look
 

ferguson

Active member

Equipment
L3130
Jan 19, 2022
242
85
28
w.v.
I’m hoping it’s not that. I worked on hydrostatic pumps in the past. It’s been a minute. Usually you can hear them whining. This acts like it’s lost the charge pressure or something silly like a linkage come loose. I’m going to pull the floor pan tomorrow and get a better look
Mine did not stop just kept getting slower & slower to the point were it would not go up a slight grade in any thing but low gear. Hope you find something simple
 
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Motion

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Lifetime Member

Equipment
Kubota MX5100HST/FEL
Aug 17, 2020
448
232
43
Mandeville Louisiana
How many hours? Did you drive it around before purchasing? Did you get it from a dealer? It's strange that after running fine and only being off for 10 minutes something failed, I believe it may be something simple. Does everything else function properly i.e., FEL, PTO, power steering? How does the clutch feel? Clutch linkage? Good Luck
 

kubotafreak

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Equipment
GRAND l6060, L3560, B6100, gr2100, tg 1860, g1800, g1900, g2160
Sep 20, 2018
942
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63
Arkansas, US
Does your three point work? Pto?
 
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North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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3,187
113
Sandpoint, ID
Any noise or change in noise when you step on the HST pedal?
 

rbargeron

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L5450, L48, L3250, L345 never enough attachments
Jul 6, 2015
1,047
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western ma
My guess would be the range shifter is disconnected somewhere and is between gears. Taking off the platform takes some time and may not show much - Cover 070 comes off with 2 screws. Worth a look-see in there before diving deeper.


MX5100 range shifter.jpg
 
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ferguson

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Equipment
L3130
Jan 19, 2022
242
85
28
w.v.
Disconect item #110 in the drawing above put a adjustable wrench on #100 and rotate it you will be able the feel if it is moviny the gear clusters in the gear case. You can do all this from under the tractor.
 

rbargeron

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L5450, L48, L3250, L345 never enough attachments
Jul 6, 2015
1,047
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western ma
This HST has ELECTRONIC controls - we've been talking about mechanical causes but its very possible the issue is electrical. If the solenoid valves aren't working the tractor won't move. There are several electrical "faults" that could be preventing normal operation.

Hope somebody posts about the owners book and using the HST display on the "intellipanel". I don't have manuals on the newer HST's - but there is a discussion here (starting at post #31) on solenoid valves causing a "no movement" issue.

The newest edition of the owners book is Kubota #TC250-19717 MX4700 MX5100 Operators Manual - available here and elsewhere. Probably a good thing to have.

Best luck - Dick B.
 
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rbargeron

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L5450, L48, L3250, L345 never enough attachments
Jul 6, 2015
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western ma
edited post #18 - see above
 
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