M59 Discussion Thread

[Stonehaller]

I may have been miss informed but I remember asking the dealer what the swing port put out and the main port put out and was told the same gpm number for both.

The L45 is rated, 11.8GPM main pump and 6.6 GPM on the swing pump, M59 I believe is 16.1 and 9.5 GPM. The ball valve is a good idea, but you only need the valve on the supply port for the lift to be able to operate. Something else to keep in mind is that you could combine the main and swing pump outputs if you ever needed it for a high flow attachment. One caution is that the relief pressure for the swing pump is lower than the main so you should add a check valve in the swing line to block higher pressure back to the swing pump.

 

[BandDcabinet]

View attachment 405124
Sorry it's sideways.

Any idea what the max design working pressure the ball valves can sustain?

 

[ultrarunner]

Any idea what the max design working pressure the ball valves can sustain?

The ones I buy are only rated for 600 lbs except for a few expensive ones that I have to order that are rated for 3000 lbs... also they are stainless and labeled for water/oil/gas... about $200 list for the 3/4 size.

SHARPE VALVES SS Ball Valve,FNPT,3'/'4 In - Ball Valves - 3MRD9'|'"SV50C76006" - Grainger Industrial Supply

 

[Stonehaller]

Any idea what the max design working pressure the ball valves can sustain?

Very good point. I missed that. Those valves look like low pressure valves for water service and if so natem should replace or remove them immediately. You could get away with it on the return side if you always remember to shut off the supply side first. You need a valve on the supply side rated for 3000 psi or more working pressure. Like Ultrarunner posted or this lower cost one here:

3/4" NPT CARBON STEEL 5800 PSI BALL VALVE

 

[natem]

Very good point. I missed that. Those valves look like low pressure valves for water service and if so natem should replace or remove them immediately. You could get away with it on the return side if you always remember to shut off the supply side first. You need a valve on the supply side rated for 3000 psi or more working pressure. Like Ultrarunner posted or this lower cost one here:

3/4" NPT CARBON STEEL 5800 PSI BALL VALVE

I'll have to get one of them, I have not had any problems with it yet. But I don't think I'll push it.

 

[rScotty]

Might as well keep this thread up to date. It contains a ton of useful info.

So here's notice and a link to a thread reporting on Kubota's weldable hanging brackets for anyone wanting to make accessories to fit their M59's backhoe bucket quick attach pins.

Take a look at the thread:
"M59 QA Backhoe Bucket and Weldable Ears"

http://www.tractorbynet.com/forums/...ng/335631-m59-qa-backhoe-bucket-weldable.html
rScotty

 

[bdog]

Does anyone have their rear tires loaded? The manual says it may be necessary to load them for stability when the backhoe is not attached but that they should not be loaded when using the backhoe. I never plan on removing the hoe in fact I don't even have the 3point arms. The machine seems light and easy to push around when digging. Seems that filling up the rears would help a lot. I can't figure out why the manual says not to fill the rears when using the hoe. I figure the tires will hold about 500lb each. Surely the outriggers can lift up an extra 1000lb?

I am a big fan of weight on tractors. Everything I have owned prior to this has had loaded tires and add on cast weights.

 

[sandyc]

I was told that the reason the manuals for tractors with backhoes mention not using loaded tires is that when the loaded tires are up in the air on the stabs they might loosen. Never happened to me but I check my torque every once in a while. Maybe it's an urban myth.

Sent from my iPhone using TractorByNet

 

[mike69440]

I was told that the reason the manuals for tractors with backhoes mention not using loaded tires is that when the loaded tires are up in the air on the stabs they might loosen. Never happened to me but I check my torque every once in a while. Maybe it's an urban myth.

Sent from my iPhone using TractorByNet

Simply adding weight is good! M59 Needs at least another 1000Lbs.

 

[rScotty]

Does anyone have their rear tires loaded? The manual says it may be necessary to load them for stability when the backhoe is not attached but that they should not be loaded when using the backhoe. I never plan on removing the hoe in fact I don't even have the 3point arms. The machine seems light and easy to push around when digging. Seems that filling up the rears would help a lot. I can't figure out why the manual says not to fill the rears when using the hoe. I figure the tires will hold about 500lb each. Surely the outriggers can lift up an extra 1000lb?

I am a big fan of weight on tractors. Everything I have owned prior to this has had loaded tires and add on cast weights.

" I can't figure out why the manual says not to fill the rears when using the hoe."

Well, my guess is that nailing down the tractor with that much weight would cause too much stress on the hoe itself. As it is, Kubota has already given us more backhoe than the tractor's normal weight can hold steady, and I'm figuring that letting the hoe move the tractor around is a "safety valve" for stress on the BH and frame components. If you've ever looked at that main swing pivot platform on the M59 BH and then taken a gander at the same part on a full size TLB....well, that darn plate on the M59 sure isn't all that beefy. Of course it does work OK....and I've never heard of one breaking or bending....but there has to be a limit somewhere and tractor weight just might be where the limit lives.

But maybe there's still room for you to add some weight....because it just might be that when the Kubota engineer wrote that part of the ops manual he was assuming that the owner already had the full allowable complement of three factory wheel weights per side and are meaning to say not to add loaded tires to the wheel weights that are already there. Could be.... after all, wheel weights really are a better solution even if more expensive, and the guy is probably some sort of engineer so he's got little concept of money or the real world outside anyway.... ....so maybe he just figured anyone with an M59 would go with wheel weights first.

Can't help much more than that. Weight isn't a problem where we are here in Colorado. Just as it comes stock is good for us here in the Rocky Mountains where what we want is light weight coupled to high muscle. The M59 sure has both those things... just as long as we can agree that weighing something over 4 tons is to be considered "light".

Whatever you try, good luck and let us know.
luck,
rScotty