Re: WD45 loader

wilson ind

Well-known Member
different ways however possibly a hyd pump on pto. As i recall radr to get 2 lines off ac pump. Possibly pump off belt pulley.
 
You could add a pump to the pto or belt pulley, but either one gives you hyd that will stop when the foot clutch is pushed in. With the belt pulley pump, it is annoying to let the pulley stop before you can shift gears, etc. Better to add a pump powered by the crankshaft...gives true independent power. Power whenever the engine is running.
 
I haven't seen the first part of the post but why do
you need an extra pump. The hand clutch will take
care of it for you. If you really want a live hyd ok but
all you need is a two spool valve. There is a pipe plug
in the bottom of the pump. Use it to feed your valve
and you can pull the hyd fill dipstick out and install a
t for a return line or you can remove the drain plug
and thread your return into that. ANY pump out there
can be used in a one or two way system. One way
and two way are entirely decided by the valve and
cylinder. Most cylinders are rated for 3000 psi. You
are pushing them a little but most of the cylinders on
the market will handle what a wd45 will put out.
 
The tractor pump can do it. A modern pump is so much nicer. 10+ gpm flow vs a couple gpm. I put a front pump on my D17 for a loader. So much nicer than the stock setup I ran on my WD. I can shift any gear I want and not worry about loader function. If you are going to the trouble of setting up 2 way hydraulics, spend a couple hundred more on a good pump.
AaronSEIA
 
10 gal/min you are going to need an external
reservoir or you're going to get that oil to hot. You're
also going to loose quite a bit of power over what
you would have had off the allis pump unless you
spend big bucks. You'll also have to get a valve body
with a pressure relief or a two spool or and an
external pressure relief. A pump at ten gallons per
minute will make the loader faster but an auxiliary
system is going to have considerably less lifting
power as they are much lower pressure. A wd45 only
holds five gallons according to the I t manual. The
hand clutch gives you live hydraulic. Issues
associated with putting an auxiliary pump are by far
not worth the effort just so you can use the foot
clutch in my opinion.
 
The front pump on my D17 is 10 gpm. Have a 3 gallon reservoir (same size as the AC 400/500 loader was). Valve is set at 2500 psi. With modern sized cylinders, I can do more with it than my WD and stock AC loader setup. The hand clutch gives live, I want independent. To each their own, but for the extra $$$ you get way more loader.
AaronSEIA
 
My loader has 3" cylinders. It is not an allis. I have a
hard time imagining you having anything bigger than
that especially with a 3 gal. Reservoir. A 3" cylinder
at 3750 psi is going to lift more than the back of the
tractor has weight to stay on the ground. At any rate
there is no mathematical way you have more lifting
power with a reservoir that size because at 2500psi
you would need a pair of cylinders large enough you
would run out of oil before the extended.
 
Cylinders on mine are 3" as well. Size of reservoir has no bearing on what size cylinder can be used. I am comparing a 3" modern cylinder setup to my original WD and WD 9 loader. I know I can get the back of my D17 off the ground. Couldn't do that with my WD, even though it should breakout 3,000 lbs by the book. My point is the speed of a 10 gpm pump that is 100% independent of the tractor clutch is far superior to the speed of the 3 gpm pump on a WD that will pump zero oil with your foot on the clutch. True, I have the cost of the pump and reservoir but the rest is identical to what a WD using the stock pump would need.
AaronSEIA
 
You do have valid points. My point is that to match
lifting power of my loader which has 3" rams at
3750psi which I am almost certain is the right spec
but I could be wrong (I know it is either 3150 or
3750) you would need 4" rams at 2500 psi. Using
round numbers a 4"x48" cylinder will hold 2.6 gallons
when extended. To fully extend two cylinders you
would have to have 5.2 gallons available to fully
extend them. If you have two way it changes the
numbers but not by enough to make it functional
when you add two for the bucket. You have a valid
point about the speed of a 10 gpm pump and
independent hyd. I always use the hand clutch/
power director on an allis so that is irrelevant to me
but that is a personal preference. Also right or wrong
3750psi is where my pump is set.
 
You are right about the lifting power. A WD was never meant have that much cylinder on it. The stock ones are roughly 2" if memory serves. My WD cut out at around 3400 lbs so 3750 is close enough. Technically a loader with 2 way cylinders is a closed loop needing no more or less oil at any given cylinder position.
AaronSEIA
 
My loader tractor is not Allis and It has 2 two way 2" lift cylinders and one two way 3 1/2" on bucket and have only a 2 1/2 gallon reservoir which has only 2 gallon in it. Once you get the air out of system you are only taking oil from one side of cylinder and putting in the other side so reservoir oil level stays roughly at the same level all the time.
 
The key word is roughly and that is proportional to the size of the cylinder. Your 2" cylinders dont hold more than 1/2 gallon to a gallon. Your resovior is large enough when you figure two way. You're talking apple and oranges because you have much smaller cylinders and roughly the same size resovior than we were talking about. Put 4" cylinders on it and try it. It WILL NOT work. Theres a cylinder rod on one side and not the other. You are not just taking oil from one side and putting it on the other. My father In law has an 8n with a two gallon resovior and 3" cylinder. It will only raise 3/4.
 

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