1991 B7100 HST: Kubota Review  -- Kubota Tractors Discussion Forum and Review 1991 B7100 HST: Kubota Review -- Kubota Tractors Discussion Forum

  parts   |   manuals   |   discussion   |   photos   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   contact   |   faq   |   myProfile   |   home          Login Now | Sign Up


FAQ:   What is a tractor?

Forum Index

Kubota Tractors
  Kubota News
  Kubota Price
  Kubota Review
John Deere Tractors
  John Deere News
  John Deere Price
  John Deere Review
New Holland Tractors
  New Holland Tractor Price
  New Holland Tractor Revie
Other Tractor Brands
  Articulated Tractors
  Belarus
  Bobcat Tractors
  Case
  Cub Cadet
  Hinomoto
  Kioti Tractor
  Long
  Massey Ferguson
  Mitsubishi
  Other Tractor Brands
  Other Tractor News
  Shibaura
  Yanmar Tractors
Lawn and Garden Tractors
  Craftsman
  Cub Cadet Garden
  John Deere Garden
  Kubota Lawn Garden
  Other Garden Tractors
  Simplicity
  Toro Wheelhorse
  Ventrac Lawn Tractors
Antique Tractors
  Allis Chalmers
  Case David Brown
  Farmall IHC
  Ford
  Ford 9N 2N 8N
  Fordson
  Harry Ferguson
  John Deere Older
  Massey-Harris Ferguson
  Minneapolis Moline
  Oliver Cletrac Cockshutt
  Restoration
  Tractor Pulling
Tractor Attachments Implements 3ph
  Back Hoe
  Field Mowers Brush Cutter
  Grooming Mowers Finish Mo
  Loaders
  Snowblowers / Snow Plows
  Tillers and Ploughs
  Tractor Implements
  Trenchers
  Wood Chippers 3PH
Tractor Maintenance
  Diesel Fuel Lubrication E
  Tractor Engine Repair Reb
  Tractor Tires
Utility ATV
  All Terrain Vehicles
  John Deere Gator
  Mule Utility Vehicles
General Tractor
  Farming Ranching Agricult
  Photo Contest
  Size Tractor Needed
  Tractor Projects
  Tractor Safety
  Welding
Chinese Tractors
  Jinma Farmpro Agracat
  NorTrac Tractors
  Other Chinese Tractors
Cars
  All Brands
  Audi VW
  BMW
  Car Tires and Maintenance
  Chrysler
  Exotic, Sports, Racing
  Ford Cars
  General Motors
  Honda
  Hyundai
  Mercedes
  News
  Nissan
  Subaru
  SUV and Trucks
  Toyota Cars
Trucks Trailers
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
Home Building
  Alternate Electric Energy
  Barns Pole Barns
  Buying Ranch Farm Acreage
  Carpentry
  Contractors
  Electric
  Excavation
  Moldings Finish Trim
  Other Home Building
  Pellet Stoves
  Plumbing
  Wood Stoves
Tools
  Electirc Power Tools
  Gas Power Tools
  Generators
  Shop Tools
  Techniques Howto
Landscape
  Flowers Shrubs Garden
  Golf Course Maintenance
  Irrigation Systems
  Landscape Design
  Landscape Lighting
  Landscape Maintenance
  Lawn, Turf, and Grass
  Vegetable Gardening
Construction
  Caterpillar
  Komatsu
  Wheel Loaders
Current Events Health Happiness
  Current Events
  Dogs and other Pets
  Electronics And Computers
  Food
  Health
  Just For Fun Off Topic
  Movies Music Games
  Personal Finance Investme
  Sports Outdoors
Tractorpoint Site
  Member Photos
  Site Members
  Website Operations Howto


New As Posted | Active Subjects



Click to Post a New Message!

Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Page [ 1 ] |
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 10-13-2005, 08:09 Post: 117826
dannycora



Join Date: Jun 2005
Location: San Diego
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

3
Filter by User
 1991 B7100 HST

I have a 1991 B7100 HST with 800 hours. When going in reverse, it is slow and sometimes I have to increase rpm for it to creep along slowly. It does better on high than in Lo speed. I check the fluid and it is slightly overfill. It also has a growling/vibration in reverse. About a year ago, I had water contamination in the transmission but I changed and flushed with new filters and fluid. Any advice is greatly appreciated. Dan






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 10-13-2005, 08:26 Post: 117828
Chief



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: Southwest MiddleTennessee
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4280

2
Filter by User
 1991 B7100 HST

Water contaminatin is VERY difficult to completely flush out. It has been my experience that it may take more than a single drain and flush. The water combines with other contaminants and can cause a build up of "crud" which can not only readily clog up or restrict the filters but the pickup screen as well. Have you tried to drain a quart to half gallon of fluid into a clear container to observe what the color and condition of the oil looks like?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 10-13-2005, 08:45 Post: 117834
dannycora



Join Date: Jun 2005
Location: San Diego
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

3
Filter by User
 1991 B7100 HST

No, I have not drain and check the color of the fluid but the dipstick shows clean fluid. I am thinking about taking it to the dealer but I thought I would try and fix it myself if I can. Is there a way to power flush ? I will try and repeat the fluid change and new filters again. What's with the growling/vibration ? Do you think the check valves or orifices in the transmission is clogged ? Thanks in advance for any advice. Dan






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 10-13-2005, 09:30 Post: 117839
Chief



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: Southwest MiddleTennessee
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4280

2
Filter by User
 1991 B7100 HST

Please excuse the lengthy reply but I figure a basic troubleshooting list would be of more help to you than my trying to type it all out. Hopefully is should give you a few ideas as to what to look at. Most hydrostatic drives are similar and fairly basic systems with the exception of the electronics of the Deere 4000 Ten series and up which is where this trouble shooting list came from. Disregard the parts about the pedal potentiometers and related electronics. I agree that the growling noise is typically caused by air that needs to be purged fromt the system.



Symptom: Machine Movement Problem
(1) Wheels On Machine Will Not Rotate?
Yes - Check torsional damper between engine and
pump
Yes - Hydraulic oil level low in transaxle
Yes - Low charge pressure. See Tests and
Adjustments section.
Yes - Internal pump or motor damage or excessive
wear
Yes - Parking brake engaged or malfunctioning
Yes - Transaxle malfunction. See Final Drive Power
Train section.
Yes - Forward/Reverse proportional valve
malfunction
Yes - Pedal potentiometers neutral position not
properly adjusted, Debris under pedal(s) or pedal
return spring problem
Yes - Seat switch malfunction
(2) Noisy Pump or Motor?
Yes - Hydraulic oil level low in transaxle
Yes - Main drive pressure relief valve stuck open.
See Tests and Adjustments section.
Yes - Air in system. See Hydraulic System Bleed
Procedure.
Yes - Internal pump or motor damage or excessive
wear
Yes - Parking brake engaged or malfunctioning
(3) Sluggish Response To Changes In Speed?
Yes - Hydraulic oil level low in transaxle
Yes - Low charge pressure. See Tests and
Adjustments section.
Yes - Main drive pressure relief valve stuck open.
See Tests and Adjustments section.
Yes - Air in system. See Hydraulic System Bleed
Procedure.
Yes - Hydrostatic pump output pressure too low.
See Tests and Adjustments section.
Yes - Internal pump or motor damage or excessive
wear
Yes - Forward/Reverse proportional valve
malfunction
(4) Low Power?
Yes - Hydraulic oil level low in transaxle
Yes - Low charge pressure. See Tests and
Adjustments section.
Yes - Main drive pressure relief valve stuck open.
See Tests and Adjustments section.
Yes - Air in system. See Hydraulic System Bleed
Procedure.
Yes - Hydrostatic pump output pressure too low.
See Tests and Adjustments section.
Yes - Internal pump or motor damage or excessive
wear
(5) Wheels Rotate In One Direction Only?
Yes - Main drive pressure relief valve stuck open.
See Tests and Adjustments section.
Yes - Forward/Reverse proportional valve
malfunction
Yes - Pedal potentiometers neutral position not
properly adjusted, Debris under pedal(s) or pedal
return spring problem
(6) Machine Does Not Move When Forward or
Reverse Pedals Are Pressed?
Yes - Hydraulic oil level low in transaxle
Yes - Low charge pressure. See Tests and
Adjustments section.
Yes - Internal pump or motor damage or excessive
wear
Yes - Parking brake engaged or malfunctioning
Yes - Transaxle malfunction. See Final Drive Power
Train section.
Yes - Forward/Reverse proportional valve
malfunction
Yes - Pedal potentiometers neutral position not
properly adjusted, Debris under pedal(s) or pedal
return spring problem
Yes - Seat switch malfunction






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 10-13-2005, 11:07 Post: 117844
dannycora



Join Date: Jun 2005
Location: San Diego
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

3
Filter by User
 1991 B7100 HST

Thanks for the list. I will check it out as much as I can and if I cannot fix it, I will probably go to Kubota. Thanks again and you have a good day. Dan






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] |

Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Thread 117826 Filter by Poster:
Chief 2 | dannycora 3 |

 (advanced search)

Picture of the Day
Bick333

Grooming Mowers Finish Mowers - 914A 60  mid mount mower deck for sale in suffolk va 2002 model
914A 60 mid mount mower deck for sale in suffolk va 2002 model


Unanswered Questions

Drain Cock
Need more hydraulic flow for s
HINOMOTO HB 501
Belarus 420A - Problems bleed

Active Subjects

460 Long hyd leak
Key will not start engine
6x4 engine rebuild vsHarbor Fr
Things we say and what do they
The Plus and Minus of Ignoring
Looking to buy a New Pickup Tr
Need more hydraulic flow for s
Mitsubishi D 3250


Hot Topics

Tractor Category 1 2 3 Hitch s
Duerr hp 678 Chipper replaceme
Gator 620i gas in engine oil
KUBOTA Tractor Trouble Free Qu
Gator 6x4 Overheating problem
Duerr hp 678 Chipper Manual
Adjusting 7308 Pressure Relief
Long 460 hydraulic problem


Featured Suppliers

Mountain Creek Labradoodles
      MountainCreekLabradoodles.com





New Forums on Gun Sport Shooting and Hunting -- BarrelPoint.com  New Forums on Horses ManePoint.com
Talk Horses at ManePoint
Hunting + Gun Sports at BarrelPoint



Most Viewed

+ Kubota AT70s Rear Tine Tiller
+ Kubota HST GST Shuttle or Gear Transmission
+ Best Boom Mower for Kubota B2710 Tractor
+ Definition of Tractor Loader Breakout force
+ Kubota B3200 vs JD 2720
+ New Kubota L3240 First Look Review
+ Kubota Transmission Fluid SUDT
+ Kubota BX2230 VS kIOTI CK20HST
+ KUBOTA Tractor Trouble Free Quality
+ kubota bx25 vs john deere 2720

Most Discussion

+ How to match Truck to Trailer
+ New Kubota L3240 First Look Re
+ Kubota Number 1 in Compact Tra
+ KUBOTA Tractor Trouble Free Qu
+ Source for after market produc
+ 3-Point Quick Hitch
+ B 7100 ST - Making the Leap
+ Kubota Transmission Fluid SUDT
+ Kubota vs John Deere Compact T
+ L3130HST vs JD4310Hydro HELP

Newest Topics

+ Kubota B2301 vs Deere 2025R vs Mahindra Max24
+ 5040 shear on my PTO shaft
+ Kubota B7100 HST Flipped Will Not Move
+ Kubota b7100-hst
+ B2601 vs bx1800
+ 2000 B2710 I need a loader dealer wants over 4K an
+ Upgrading the Factory 145amp Alternator to 40 Amp
+ Kubota BX2750 Snowblower Fan Shear Pin Alignment
+ Size Kubota for Homeowner Use
+ I need some OEM Quality decals for a B7500 DT-TLB
















Turbochargers for Tractors and Industrial Machines
Cab Glass for Tractors and Industrial Machines

Alternators for Tractors and Industrial Machines
Radiators for Tractors and Industrial Machines

Driveline Components for Tractors and Industrial Machines
Starter Motors for Tractors and Industrial Machines