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I need opinions

lgt145 hydraulics

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16 replies to this topic

#1 Chopperhed OFFLINE  

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Posted January 16, 2015 - 10:26 PM

If you haven't noticed, I'm building a dozer out of a junked LGT145.

 

My question is. how much of an extra load can the charge pump handle?

 

I plan on adding 3 circuits, blade lift, blade angle, and blade tilt. The factory lift circuit will be used for the rear ripper.

 

I also plan on adding an auxiliary reservoir for the hydro system, probably with a cooler of some sort.

 

Or

 

I could add an extra pump and run the front circuits from that but I worry that a 13 hp clone engine wont be able to handle all of it.

 

Either way, the tank and cylinders and valves will all be required.

 

My guestimation is that so long as I don't expect speed, it should work, provided I feed it enough fresh cool clean oil. I figure I will only ever be using one circuit at a time.

 

Any thoughts?

 

 



#2 MH81 ONLINE  

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Posted January 17, 2015 - 06:28 AM

Lifting the blade when in operation is different than just lifting a blade. There can be a huge resistance to the lift or angle adjust and (now I am not a hydraulics guy, just a user) I would think a dedicated pump would be a far better way to go.

#3 NUTNDUN OFFLINE  

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Posted January 17, 2015 - 06:30 AM

If you stay with smaller bore cylinders I think you might be alright and like you mentioned only using one valve at a time. I don't know much about hydraulics other than basic principles. Sounds like a very interesting project and I know I will follow the progress.



#4 shorty ONLINE  

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Posted January 17, 2015 - 06:53 AM

From what I have used so far, I think it would work but have limited power. I know that my three point lift that runs off the hydro is easy to max out.



#5 Jazz OFFLINE  

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Posted January 17, 2015 - 08:21 AM

I had never seen one of these garden tractor sized dozers until November last year when I spotted one in the back lane when I was coming out of a Arctic Cat dealer in Kelowna BC...no doubt its still there as it did not look to have been used for some time...good luck on your build...



#6 Chopperhed OFFLINE  

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Posted January 17, 2015 - 11:59 AM

I picked up the smallest cylinder I could find. The tilt cylinder and control valves have not been purchased yet, need to save some more money first.

 

Angle Cylinders http://www.princessa...der/A-p8480188e

Lift Cylinders  http://www.princessa...der/A-p8411043e

Tilt Cylinder  http://www.princessa...der/A-p8557647e

Valves  http://www.princessa...lve/A-p1249556e



#7 olcowhand ONLINE  

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Posted January 17, 2015 - 12:22 PM

As far as reserve oil, when using double acting cylinders, the only variance in the oil supply will be the displacement of the cylinder shafts themselves, so you should be ok.  Speed will be slow as you know if larger cylinders are used.  



#8 Auburn David OFFLINE  

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Posted January 17, 2015 - 01:24 PM

I have a 5 (I tag-00528-sectional-pump-1002000-sm5-138think its 5) stage pump that would be perfect for what your doing.looks just like this one.



#9 skyrydr2 ONLINE  

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Posted January 18, 2015 - 07:02 AM

13 HP ain't turnin' that pump under load.... The charge pump is good for maybe 800 psi max and 1.5 GPM you will need more pump for sure!! You only need about 6 gpm and maybe 1200 psi and the hydraulics will do anything you want. And the engine should be able to handle it just fine.
Get a multi spool valve with a float section for the blade and use your hydro's circuit for the ripper only. If you want the ripper to "punch in" use a large cylinder,remember you have only 500-800psi max to work with.
A powersteering pump from a gm van would work very nice, and you can add a second larger resivior to them easy, as they had this from the factory. Reason i say use one of these pumps, is it is a vain pump and will allow the engine to start and run way easier than a gear pump.
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#10 Auburn David OFFLINE  

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Posted January 18, 2015 - 09:42 AM

The 5 stage pump I posted is linked to a 16hp Briggs,it came off a Jacobsen greens king4 reel mower.


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#11 Chopperhed OFFLINE  

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Posted January 18, 2015 - 11:31 AM

The 5 stage pump I posted is linked to a 16hp Briggs,it came off a Jacobsen greens king4 reel mower.

is that direct drive or can it be belt driven.



#12 Auburn David OFFLINE  

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Posted January 18, 2015 - 11:35 AM

it was set up direct drive,but I am sure it could be belt driven.



#13 Auburn David OFFLINE  

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Posted January 18, 2015 - 11:37 AM

I saw on on Ebay for sale it had some specs and such in the listing,probably gone by now.



#14 Auburn David OFFLINE  

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Posted January 18, 2015 - 11:40 AM

If you could find one of the Greens King 4 mowers up your way it would have lots of stuff you could use(pump,nice tank,and hydro motors..ect..)


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#15 Chopperhed OFFLINE  

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Posted January 18, 2015 - 10:04 PM

Stuff like that is a little hard to come by up here.


skyrydr2 has my next best option
Direct drive pumps aren't an option due to space constraints.  

Edited by NUTNDUN, January 20, 2015 - 12:24 PM.





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