Stupid Tractor Mechanic
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Does anyone no where to find a Hyd. flow schematic for a 2955
- Thread starter Stupid Tractor Mechanic
- Start date
Are you still having Hydraulic problems with the loader on this tractor??? Does it work alright for a short time when you begin to lift the loader? Then it starts to chatter??
If this is the case than your loader through the SCVs is the problem. These tractors where made to have an external valve that returned to the filter cup.
How do I know this??? JD Tech for twenty-five years. Mounted hundreds of loaders. Seen a lot of tractors ruined because the the owner would not spend the money to plumb the loader valve. Trying to do it on the cheep. Email me and I will send you my phone number. I can explain it better. [email protected]
If this is the case than your loader through the SCVs is the problem. These tractors where made to have an external valve that returned to the filter cup.
How do I know this??? JD Tech for twenty-five years. Mounted hundreds of loaders. Seen a lot of tractors ruined because the the owner would not spend the money to plumb the loader valve. Trying to do it on the cheep. Email me and I will send you my phone number. I can explain it better. [email protected]
buickanddeere
Well-known Member
1-800-522-7448
buickanddeere
Well-known Member
What is the problem(s),how is the loader plumbed and what have you replaced,changed or tested?
So... is that just a round-a-bout way of saying the tractor had a botch job for a hydraulic system the day it left Manheim?
I can understand direct plumbing the loader with mid-mount valves simply to keep it tidy, keep the SCV's free... and it's easy to do, but I don't see what's so special about loader demands over any other continous demand that could be placed on the SCV's...
Rod
I can understand direct plumbing the loader with mid-mount valves simply to keep it tidy, keep the SCV's free... and it's easy to do, but I don't see what's so special about loader demands over any other continous demand that could be placed on the SCV's...
Rod
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
A JD technical manual for a 2955 will have an oil schematic.
I'm guessing you have a broken or leaking tube inside transmission. Depending on how it's equipped the ind pto & hyd hi-lo have these tubes.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Some members of this forum think a loader can't function without an independent control valve returning oil to filter. I not saying it's not a better way just not ALWAYS required in every loader application..
If it is so detrimental why did JD engineers offer this option when purchasing a new JD loader??????????????????
i betting ther not all that much wrong with your hy, just a matter of finding the problem or someone to help but i bet it has nothing to do with your loader. though power beyond does leave you rears remote free it not required to ues it,, and i have seen many ues remote with no problem. i have fix lot hyd on jd tractors and most trun out to be a simple fix. main thing is it very seldom the main hyd pump but for some reason that what most people change. there is a bushing in the clutch housing that hold the main transmission supply line from moving foward it well dis lodge and you loues your oil supply to the main hyd pump. i well look it up this eving and post part number. dont pull out you hair or get to upset it is fixable. when i need scamatic of a hyd or electrica i go borrow one from local dealer. most case you i-t manual well give you as much info a a jd manuals. and more ueable frindly. also research jdparts.com. look at parts break down.
That was my question....
I'm pretty sure the system can function just fine with the loader working on the SCV's...
I find it hard to believe that Deere would spec the system so tight that the front pump required return flow to meet it's charge requirements.
I know that NH's Genesis series charge pumps move 130% of rated system flow so there's always extra there, THEN they dump return flow into the SUCTION strainer. I highly doubt that Deere was any different...
Rod
I'm pretty sure the system can function just fine with the loader working on the SCV's...
I find it hard to believe that Deere would spec the system so tight that the front pump required return flow to meet it's charge requirements.
I know that NH's Genesis series charge pumps move 130% of rated system flow so there's always extra there, THEN they dump return flow into the SUCTION strainer. I highly doubt that Deere was any different...
Rod
buickanddeere
Well-known Member
Take a look at the JD Dubuque and Mannheim trans pump specs. They are 7-8gpm gross and the front pump only receives the net flow after the trans/pto lubrication and clutches are supplied.
Not enough to continuous supply a 13-20gpm front pump. The front pump relies the couple of gallons of oil in the tank and cooler for brief high flow loads.
For continuous high flow hydraulic loads. Mother Deere lists the ported filter cover in the parts book for every closed center 10,20.30,40,55 series Waterloo, Dubuque and Mannheim tractor made.
The Waterloo tractors do have a higher flow trans pump and a better return from the scv’s. And can work fine with same sized front pump flow. That a Dubuque/Mannheim cavitates without a ported filter cover.
I can't imagine why anybody would tie up scv's with a loader etc. So they can't be used with another hydrualic load.A "T" for the high pressure line is not expensive.
It does require a little imagination and that is a comodity often in short supply.
Not enough to continuous supply a 13-20gpm front pump. The front pump relies the couple of gallons of oil in the tank and cooler for brief high flow loads.
For continuous high flow hydraulic loads. Mother Deere lists the ported filter cover in the parts book for every closed center 10,20.30,40,55 series Waterloo, Dubuque and Mannheim tractor made.
The Waterloo tractors do have a higher flow trans pump and a better return from the scv’s. And can work fine with same sized front pump flow. That a Dubuque/Mannheim cavitates without a ported filter cover.
I can't imagine why anybody would tie up scv's with a loader etc. So they can't be used with another hydrualic load.A "T" for the high pressure line is not expensive.
It does require a little imagination and that is a comodity often in short supply.
well my bet is that today a full power byond with joy stick and valev are around 1500.00 i have uesd one i sell for 750.00 and it missing the cables whitch run around 100.00. a pices that be my first guess why some one would tie up a remote on the back. i think evey one know it best to ues seperet valve and rout retrun back in to bottom of hyd filter. that being said it well work using the remotes.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
b&d
Imagine this if JD engineers thought it was so bad to use SCV's to operate a JD loader on a Dubuque/Mannheim utility tractor then why is the option offered in JD loader PARTS & SALES MANUALS? Also this option was offered for many years.
Granted an ind valve is better but not every loader owner needs/requires the ind valve.
buickanddeere
Well-known Member
The point was that most tinkers think of hydraulic oil from the scv's. And can't/won't imagine obtaining and returning hydraulic oil from anywhere else. "Tunnel vision" or something.
As for cost? Adding one or two more scv's to use the loader and another scv load costs $$$.
A "T",a ported filter cover and a joystick is not expensive. With the bonous of a front pump that isn't cavitating.
A faster loader that doesn't require pushing the clutch to wait. Has to be a productivity improvement and less wear on the clutch.
As for cost? Adding one or two more scv's to use the loader and another scv load costs $$$.
A "T",a ported filter cover and a joystick is not expensive. With the bonous of a front pump that isn't cavitating.
A faster loader that doesn't require pushing the clutch to wait. Has to be a productivity improvement and less wear on the clutch.
buickanddeere
Well-known Member
Well my bet is that today a full power beyond with joy stick and valve are around 1500.00 I have a used one I would sell for 750.00 and it is missing the cables which run around 100.00. The price would be my first guess why some one would tie up a remote on the back. I think every one knows it best to uses separate valve and route return back in to bottom of hydraulic filter. That being said it works well using the remotes.
I couldn’t imagine using a factory Power-Beyond block when a couple of $15.00 “T” work just as well.
As for everybody knowing? That is being rather generous. Even the local dealership installed the 48 loader on Dad’s 2020 using just the rear scv, a bungee cord and independent controls. Later after the ssssssssssssllllllllllllllloooooooooooowwwwwwwwwwww loader operating, the vibration, noises and wait times for the loader to lift with the clutch pressed.
We were both pleased and astounded with the loader performance after it was direct fed and ported cover returned.
I couldn’t imagine using a factory Power-Beyond block when a couple of $15.00 “T” work just as well.
As for everybody knowing? That is being rather generous. Even the local dealership installed the 48 loader on Dad’s 2020 using just the rear scv, a bungee cord and independent controls. Later after the ssssssssssssllllllllllllllloooooooooooowwwwwwwwwwww loader operating, the vibration, noises and wait times for the loader to lift with the clutch pressed.
We were both pleased and astounded with the loader performance after it was direct fed and ported cover returned.
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