Crushed hydraulic pump input line impacts??: Kubota Review  -- Kubota Tractors Discussion Forum and Review Crushed hydraulic pump input line impacts??: 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
New As Posted | Active Subjects



www.emerichsales.com - New & Used Equipment
          View Tractors For Sale!


www.partsbynet.com - Lawn and Garden Equipment Parts


Bernardsville Landscape Lighting
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
 03-24-2003, 18:58 Post: 51770
Mike In Ont
2003-03-24 18:58:33
Post: 51770
 Crushed hydraulic pump input line impacts??

My B20 has a crushed hydraulic line just before the front mounted pump inlet. It appears that it would be restricting flow by about 50%. What impacts would this be having on either the Loader, Backhoe or drive hst ???

Thanks!!

Mike in Ont






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-25-2003, 00:38 Post: 51799
jeff r



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: burton. michigan
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 428
 Crushed hydraulic pump input line impacts??

LITTLE or REDUCED FLOW EQUALS SLOW OPERATION. FIX IT QUICK BEFORE SOMETHING BAD HAPPENS.






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-25-2003, 05:51 Post: 51803
hardwood

TP Contributor

Join Date: Dec 2002
Location: iowa
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 3582
 Crushed hydraulic pump input line impacts??

Stop, fix it now, or you'll probably buy a pump too from cavitation, pumps without enough oil don;'t last long.






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-25-2003, 07:38 Post: 51810
TomG

TP Contributor

Join Date: Feb 2002
Location: Upper Ottawa Valley
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5406

2
Filter by User
 Crushed hydraulic pump input line impacts??

It certainly should be fixed. Some typical symptoms that damage is being done is if there is a buzzing or rattling sound from the pump, the oil gets hot or it becomes foamy. If none of things are apparent the restriction may not be enough to cavitate oil in the pump and the tractor may be OK for limited light duty use before repairs, but no guarantees that use won't do some damage.






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-25-2003, 08:13 Post: 51815
Peters

TP Contributor

View my Photos

View my Photos  Pics
Join Date: Feb 2002
Location: Northern AL
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 3034
 Crushed hydraulic pump input line impacts??

I guess this is why it is important to determine if any cavitation is occuring.
In a closed system cavitation means that the hydraulic oil must vaporize into small bubbles. As soon as the vacuum on the oil decreases, in the pump the bubbles collapse. The small bubble, as the vapor pressure of the oil is high, needs a lot of heat to form. It extracts it from the surrounding oil. As the bubble collapses the heat is returned in a small pulse of heat and pressure.
This pits the surfaces in the pump and can quickly do considerable damage. The process is similar to what happens in a sonic bath, like those used to clean jewelry. Note that they never want to leave your rings in it any longer than necessary.
I worked on sono chemistry for a time.
This is a lot different than entrained air in the system.






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-26-2003, 05:27 Post: 51885
TomG

TP Contributor

Join Date: Feb 2002
Location: Upper Ottawa Valley
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5406

2
Filter by User
 Crushed hydraulic pump input line impacts??

The notion of bubbles eroding steel always mystified me. Never the less I have a picture of the results of pump cavitation that shows a dished out area on the cavity wall almost a quarter of its width. I've also heard that coolant cavitation in some diesels is sufficient to cause perforations in water jackets. Again pressure differential is the cause. High-energy sound waves made by the engines create high and low pressure zones. Coolant that is already near its boiling point boils in areas low pressure. For this reason it's good to change coolant every two years. Engines that are highly prone to coolant cavitation often use an additive that reduces cavitation.

The idea of a cavitating pump as kind of a heat pump that transfers energy from one place to another never occurred to me. Thanks for the comment.






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-26-2003, 06:09 Post: 51888
Art White



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Waterville New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6838
 Crushed hydraulic pump input line impacts??

Seems the replacement of the line is needed asap. Good work boys!!!!






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




Bookmarks: Digg It | Del.icio.us | Stumble This

 03-27-2003, 15:26 Post: 51996
mike in ont
2003-03-27 00:00:00
Post: 51996
 Crushed hydraulic pump input line impacts??

Thanks all!!! Time to order the part!!

Mike In Ont!






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




Bookmarks: Digg It | Del.icio.us | Stumble This

Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] |

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

Thread 51770 Filter by Poster:
Art White 1 | hardwood 1 | jeff r 1 | Mike In Ont 2 | Peters 1 | TomG 2 |




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

+ 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
+ Kubota 4750DT Fuel Venting
+ B1700 Hydostatic unit leaking
+ Kubota B2710 New to meadvice
+ Kubota L4330 three point hitch won t rise
+ Kubota B7200 Hydraulic leak













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