L1500 Low oil pressure: Kubota Review  -- Kubota Tractors Discussion Forum and Review L1500 Low oil pressure: Kubota Review -- Kubota Tractors Discussion Forum

  discussion   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   photos   |   email   |   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!



Bernardsville Landscape Lighting
Click to Post a New Message!

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

Page [ 1 ] | 2 | | Next >>
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 10-10-2003, 19:37 Post: 65982
rtate
2003-10-10 00:00:00
Post: 65982
 L1500 Low oil pressure

I was having trouble with low oil pressure on my L1500, so I replaced the oil pump. Mowed with it today and after working it pretty hard the low oil pressure light started coming on again. It seemed to be running pretty hot. What could the problem be if it's not the oil pump? It does seem to run ok for a longer period of time with the new pump, but started coming on anytime the RPM dropped below about 800 RPM.

HELP!






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




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

 10-10-2003, 19:44 Post: 65984
kwschumm

TP Contributor

View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: NW Oregon
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5759
 L1500 Low oil pressure

I'd start by checking the oil pressure sending unit. If it's working OK then a couple of other possibilities could be using an oil of too light a viscosity, or (and this is bad) a worn out engine (bearings, valve guides, etc).






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




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

 10-11-2003, 04:33 Post: 66002
harvey

TP Contributor

View my Photos

View my Photos  Pics
Join Date: Sep 2000
Location: Moravia, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1515
 L1500 Low oil pressure

I'd get a live pressure guadge and put it were the sending unit is mounted. Me thinks before you start replacing stuff you should get a accurate reading of the pressure.

If you have low pressure after running, are return passages partially plugged? Shut down engine and pull dip stick is it low? Does the level come up after a while? This problem is usually caught while oil is cool.

If you have excessive engine wear an oil anaylisis can tell you where the wear is.

As ken asked what kinda oil are you using? Is the engine burning oil? Losing/leaking oil? Does the engine have enough oil?

Did someone swap a dipstick and give you one that is too long, 2-3 quarts will show full while it should have 5-6???






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




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

 10-11-2003, 07:51 Post: 66010
Art White

TP Contributor

View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Waterville New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6744
 L1500 Low oil pressure

What is the low RPM limit supposed to be for that tractor? You could have an engine that is that worn that it would be over heating and causing your problem. The boys gave you some good advice from both Ken and Harvey, a cheap oil would also do what you are refering to.






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




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

 10-11-2003, 08:39 Post: 66018
TomG

TP Contributor

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

4
Filter by User
 L1500 Low oil pressure

For more exotic problems, I've heard that a few Kubota engines had an aluminum plug on the ends of the rocker arm shaft. These plugs had a tendency to come out, which would produce low pressure and a lot of oil under the rocker-arm cover. I don't know which engines they were but I heard there was a factory fix for the problem.

Good to make sure the pressure is really low and maybe the engine really is over-heating before doing a bunch of troubleshooting though.






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




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

 10-11-2003, 18:30 Post: 66046
rhtate



Join Date: Oct 2003
Location: san marcos tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4

4
Filter by User
 L1500 Low oil pressure

I Need tohook up a gauge again. I did that before I replaced the oil pump and it would show good pressure until it warmed up, then the pressure would drop.

It was overheating when the pressure really dropped this time. I think I was overworking it in very tall, thick wet grass. I did not relieze it was too hot until I shut it down and i could hear the coolent boiling. I am running Dello 400 10w40 oil. Any othe ideas?






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




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

 10-11-2003, 18:31 Post: 66047
rhtate



Join Date: Oct 2003
Location: san marcos tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4

4
Filter by User
 L1500 Low oil pressure

Would overheating cause low oil pressure?






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




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

 10-11-2003, 18:36 Post: 66048
rhtate



Join Date: Oct 2003
Location: san marcos tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4

4
Filter by User
 L1500 Low oil pressure

Would a worn out engine cause low oil pressure with a new oil pump?






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




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

 10-11-2003, 19:44 Post: 66051
TomG

TP Contributor

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

4
Filter by User
 L1500 Low oil pressure

Both over-heating and excessive engine wear can produce low oil pressure. Multi-grade oils thin out above some temperature and excessive bearing clearances or a broken line will reduce pressure. Not an easy thing to sort out because low oil pressure can cause over-heating and so can heavy work on hot days.

If the pressure is OK at first, I'd start by looking for causes of over-heating, but first I'd check the temperature with a thermometer unless the engine makes black smoke or a gauge shows it's over-heating. A bad rad cap can cause the coolant to boil at normal coolant temperatures, but it usually boils over too. Then, I'd start on the list of over-heating causes and there are a bunch. Fan belt tension and clogged rad are easy to check. Water pump, thermostat and hoses are not too bad. Flushing the cooling system and replacing with new 50/50 coolant isn't too difficult. Checking for exhaust obstructions, and engine adjustments is a little more difficult and there are some other things. You might notice if the engine oil level increases and if there are bubble in the coolant. A bad head gasket also can cause over-heating.

At least typical causes of over-heating can be checked out and eliminated as causes in a fairy systematic way and without a huge amount of work. If the pressure starts out low and especially if if it has high hours I'd start by checking out the engine. I'd keep in mind that it's not good to shut down an over-heated engine or to run one that has low oil pressure.






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




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

 10-12-2003, 05:33 Post: 66063
TomG

TP Contributor

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

4
Filter by User
 L1500 Low oil pressure

I was too busy figuring an organized way to sort out the problem and forgot to mention an obvious test and I also assumed it's a conventional water-cooled diesel engine.

Looking through the rad cap hole when the engine is at operating temp is a quick check for many coolant system problems. The coolant should be swirling due to the pump flow after the thermostat opens--assuming the tractor has a water pump, thermostat or rad for that matter. It does help to know how normal flow looks though. Some more assumptions on my part are that the the oil filter is right and reasonable new and that the oil pump pressure-relief valve is OK because a new pump was installed.






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




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

Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] | 2 | | Next >>

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

Thread 65982 Filter by Poster:
Art White 1 | harvey 1 | kwschumm 1 | Peters 1 | rhtate 4 | rtate 1 | TomG 4 |




Most Viewed

+ Best Boom Mower for Kubota B2710 Tractor
+ Kubota AT70s Rear Tine Tiller
+ Kubota B3200 vs. JD 2720
+ Kubota HST GST Shuttle or Gear Transmission?
+ kubota bx25 vs john deere 2720
+ Kubota BX2230 VS kIOTI CK20HST
+ Definition of Tractor Loader Breakout force ?
+ New Kubota L3240 First Look Review
+ Kubota Transmission Fluid SUDT
+ Kubota BX and B series SnowBlowers

Most Discussion

+ How to match Truck to Trailer
+ New Kubota L3240 First Look Re
+ Kubota Number 1 in Compact Tra
+ KUBOTA ARE JUNK
+ 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 L3010 Tractor will not move
+ Kubota 8560 Park does not hold
+ Lift link keeps bending and snapping
+ B1750 steers itself all the way to the left
+ Advice please! BX2360 (500 hrs) vs. B2400 (1,000
+ Kubota B2620 3pt hitch won t lift
+ Kubota 9560 Tractor Steering problems
+ Kubota BX23 Tractor Air filter brackets breaking
+ need to install a single spool valve
+ Kubota B2150 and a BT750AR Backhoe attachment