2k 4300 weak loader functionality

[paulcapasso]

Hello everyone, in the last 6 months I have noticed a decrease in power in my loader. Im thinking my front hydraulics may be at fault, but i want to be sure. I have rebuilt the lift cylinders 2 years ago, but both lift and curl capabilities are weak now. It is a 430 loader, no air in lines and no leaks. Ideas would be appreciated. Yes I use JD hyguard as book recomends.

 

[LD1]

Get a pressure gauge. Before doing that....anything else is about pointless. You can start replacing expensive parts in hopes you might get lucky. But a $20 pressure gauge and see what your system is running is where I'd start first

 

[paulcapasso]

Get a pressure gauge. Before doing that....anything else is about pointless. You can start replacing expensive parts in hopes you might get lucky. But a $20 pressure gauge and see what your system is running is where I'd start first

Thought of that too. Ill get one. Is there any adjustments for pressures on the machine anywhere?

 

[LD1]

Thought of that too. Ill get one. Is there any adjustments for pressures on the machine anywhere?

Probably. But you may have a weak pump, or a loader valve leaking by, or the rebuilt cylinders leaking by. Lots of possibilities. But you dont want to even think of messing with the pressure until you have a gauge.

 

[beenthere]

No mention of when last hyd. oil and filter change, as well as the screen cleaned. Any history?

What precipitated the lift cylinders being re-done? Just curious... nothing implied.

 

[paulcapasso]

Fluid change needs to be done. Its just shy of 500hr hydro change. Screen was clean last time, ill keep that in mind.

 

[larboc]

Hello everyone, in the last 6 months I have noticed a decrease in power in my loader. Im thinking my front hydraulics may be at fault, but i want to be sure. I have rebuilt the lift cylinders 2 years ago, but both lift and curl capabilities are weak now. It is a 430 loader, no air in lines and no leaks. Ideas would be appreciated. Yes I use JD hyguard as book recomends.

Sounds like a lift cylinder piston seal. One of them pops out on my 430 loader if I let the loader all the way to the ground when I leave the machine. If I work the loader up and down a bunch of times and bounce it, it will pop back in. You can check by putting a load beyond lifting capacity on the forks, then taking off a hose on the retract side of the lift cylinders and then pulling back on the joystick to lift the loader. If fluid is coming out of the retract circuit, you've lost a piston seal. Pull the line off of one side at a time to figure out which one. When mine does it it seems like it's losing curl force too, but it can't be. I think the falling lift arms make it look like it since the effective area is only the rod area.

 

[larboc]

Get a pressure gauge. Before doing that....anything else is about pointless. You can start replacing expensive parts in hopes you might get lucky. But a $20 pressure gauge and see what your system is running is where I'd start first

Any easy place to tap in and leave one installed permanently? I think it would be handy to have one dash mounted for estimating weights and knowing how close I am to "too much".

 

[paulcapasso]

Update, will be a bit until i get the gauge, and blew a line yesterday. It was a beautiful "Pop" sound with a 15 foot spray of Hyguard across my hood. Im sure the grass is gonna have issues there this year. LOL

 

[paulcapasso]

Sounds like a lift cylinder piston seal. One of them pops out on my 430 loader if I let the loader all the way to the ground when I leave the machine. If I work the loader up and down a bunch of times and bounce it, it will pop back in. You can check by putting a load beyond lifting capacity on the forks, then taking off a hose on the retract side of the lift cylinders and then pulling back on the joystick to lift the loader. If fluid is coming out of the retract circuit, you've lost a piston seal. Pull the line off of one side at a time to figure out which one. When mine does it it seems like it's losing curl force too, but it can't be. I think the falling lift arms make it look like it since the effective area is only the rod area.

Losing curl force. Lift force is ok. But blew one of the curl lines yesterday. Ill just rebuild them anyway.

 

[steviep]

That tractor had a recall quite a few years ago. The filter under the tractor ( a tube about 6 inches long with a rubber hose attached ) was found to be faulty. Also some people might not realize there is a filter in the tube e that can get clogged.

 

[paulcapasso]

That tractor had a recall quite a few years ago. The filter under the tractor ( a tube about 6 inches long with a rubber hose attached ) was found to be faulty. Also some people might not realize there is a filter in the tube e that can get clogged.

I am aware of the screen inside that tube. Thank you for advising me of the recall I did not know that.

 

[larboc]

Update, will be a bit until i get the gauge, and blew a line yesterday. It was a beautiful "Pop" sound with a 15 foot spray of Hyguard across my hood. Im sure the grass is gonna have issues there this year. LOL

Where did you get lines from? I notice that most of the lines on the loader are the same (90* ORFS on each end), but they are crazy expensive from deere. I'd like to replace them all and I was looking at some of the online custom hose makers. I'm thinking that adapting to JIC and using regular hoses is going to take up too much room.

 

[LD1]

Wasn't aware a tractor manufacture was using orfs fittings. Are you sure that's what they are.

For the low pressures our systems run....they aren't worth the expense.

Jic is tried and true. No sealers or o-rings requires either

 

[larboc]

Wasn't aware a tractor manufacture was using orfs fittings. Are you sure that's what they are.

For the low pressures our systems run....they aren't worth the expense.

Jic is tried and true. No sealers or o-rings requires either

I'm fairly certain that just about every fitting I have had off of my 4300 and 430 loader have been ORFS. The exception is ORB on the QD ends of lines. I didn't find a single factory JIC connection. PITA because it's not commonly stocked and adapting from male ORFS to male JIC takes up a lot of room that you don't have on the loader because of the hood.

 

[paulcapasso]

[/IMG][/IMG]Update: blew a line, replaced with new ones and all power is back. Must have been a collapsed / blocked line.

 

[beenthere]

:thumbsup: :thumbsup:

 

[mike48130]

I've ordered custom lines from discount hydraulics. Prices are good compared to local.

 

[paulcapasso]

Do my images show up?

 

[mike48130]

Not on my phone.