Loader My loadeer seems to be a little weak

[Looking4new]

dfkrug, no hills. It is all flat ground. I AM debating about replacing all 4 cylinders and then rebuild the 4 I have for spares. But again that will happen in spring unless it craps out totally this winter.

 

[jyoutz]

dfkrug, no hills. It is all flat ground. I AM debating about replacing all 4 cylinders and then rebuild the 4 I have for spares. But again that will happen in spring unless it craps out totally this winter.

Instead of replacing cylinders, just remove them and take them to a hydraulic shop for rebuilding.

 

[IXLR8]

From the pump pressures you posted, I would be rebuilding the cylinders before thinking about touching the pump. You can buy better seals for the cylinders for about $15/cylinder and do it yourself, if you have the wrenches to get the cylinders apart.

 

[jyoutz]

From the pump pressures you posted, I would be rebuilding the cylinders before thinking about touching the pump. You can buy better seals for the cylinders for about $15/cylinder and do it yourself, if you have the wrenches to get the cylinders apart.

The kits from the dealers are far more than $15. If you can spec out each seal separately you can get them cheaper at a hydraulic shop, but you have to disassemble it to take the seals to them.

 

[IXLR8]

The kits from the dealers are far more than $15. If you can spec out each seal separately you can get them cheaper at a hydraulic shop, but you have to disassemble it to take the seals to them.

This is true, I ordered my seals based on sizes listed in the kioti forum and they were a higher quality than what came in the kits. I got them from Martin Fluid Power back in 2010.

Martin Fluid Power - Best Sealing solutions, Hydraulic Seals, O rings, Custom Seals | MFP SEALS

MFP Seals is a manufacturer and distributor of the highest quality sealing devices, gaskets, O-Rings, hydraulic seals, oil seals, wear rings, bearings, spring seals for over 35 years.

www.mfpseals.com

 

[dfkrug]

This is true, I ordered my seals based on sizes listed in the kioti forum and they were a higher quality than what came in the kits. I got them from Martin Fluid Power back in 2010.

Martin Fluid Power - Best Sealing solutions, Hydraulic Seals, O rings, Custom Seals | MFP SEALS

MFP Seals is a manufacturer and distributor of the highest quality sealing devices, gaskets, O-Rings, hydraulic seals, oil seals, wear rings, bearings, spring seals for over 35 years.

www.mfpseals.com

Yeah, seals were a LOT cheaper back then. I often used Hercules Fluid Power back then and purchased by size.

Recently I repaired some old Kubota cylinders and the maker wanted $200ea for the seal kits. Even Hercules was expensive, tho I got what I needed for $100ea.

 

[Looking4new]

Kioti dealer says there are two seal kits per cylinder and they are $85.oo AND $50.oo total $135.oo each cylinder plus 13% tax and freight. That'll wait until spring.

 

[IXLR8]

To test if it is a cylinder is leaking you might want to try this, if you have a floor jack.
- Lift bucket up about 2 ft.
- Put floor jack under bucket and raise it all the way.
- With tractor off, lower bucket onto floor jack.
- Disconnect the hydraulic couplers going to the bucket cylinders.
- Lower floor jack and pull it out of the way.
If the bucket lowers, there is a good chance the cylinder seals are leaking.
If the bucket does not lower, there is a good chance issue is in the bucket control valve.
If the bucket does not lower, put the jack back under the bucket and take the weight off the cylinders BEFORE you try reconnecting the hydraulic couplers. Otherwise, don't try to reconnect the couplers until the bucket settles to the ground.

 

[Looking4new]

It is confirmed. I pick up the front wheels, shut the tractor off and 30 minutes later I am picking up the front wheels again.
I am going to send it to the hydraulic shop in spring and he can do all 4 cylinders.

 

[LD1]

It is confirmed. I pick up the front wheels, shut the tractor off and 30 minutes later I am picking up the front wheels again.
I am going to send it to the hydraulic shop in spring and he can do all 4 cylinders.

Late to the party as usual....but what and how are the cylinders drifting?

Are they extending or retracting?

You are saying that if you leave the loader suspended....that it both drops the loader AND dumps the bucket.
1. The lift cylinders will now allow this to happen. Thats in the valve. As those cylinders are COMPRESSING....which CANNOT and WILL NOT happen unless fluid EXITS the cylinder
2. The curl cylinders are EXTENDING. This can happen either due to a valve OR the piston seals.

In your last scenerio....lifting the front of the tractor and not holding it in the air
1. The lift cylinders are now EXTENDING....which again...and EXTENDING cylinder can either be the cylinder seals OR the valves
2. The curl cylinders are now trying to COMPRESS. Which cannot happen due to seals. That indicates a valve.

So I am having a hard time following just what is going on.

It seems as if none of the cylinders will hold in ANY direction....either extension or retraction. Which points to a VALVE and not the cylinders.

Without more understanding or troubleshooting, I am afraid you are just going to waste your money rebuilding or replacing cylinders.

 

[Looking4new]

Late to the party as usual....but what and how are the cylinders drifting?

Are they extending or retracting?

You are saying that if you leave the loader suspended....that it both drops the loader AND dumps the bucket.
1. The lift cylinders will now allow this to happen. Thats in the valve. As those cylinders are COMPRESSING....which CANNOT and WILL NOT happen unless fluid EXITS the cylinder
2. The curl cylinders are EXTENDING. This can happen either due to a valve OR the piston seals.

In your last scenerio....lifting the front of the tractor and not holding it in the air
1. The lift cylinders are now EXTENDING....which again...and EXTENDING cylinder can either be the cylinder seals OR the valves
2. The curl cylinders are now trying to COMPRESS. Which cannot happen due to seals. That indicates a valve.

So I am having a hard time following just what is going on.

It seems as if none of the cylinders will hold in ANY direction....either extension or retraction. Which points to a VALVE and not the cylinders.

Without more understanding or troubleshooting, I am afraid you are just going to waste your money rebuilding or replacing cylinders.

The lift cylinders stutter and stumble when lifting and so do the curl cylinders. Often I have to return the control valve to the neutral position and then try again to get it to lift or curl.
I will get the hydraulic shop 5 miles down the road to sort it out in Spring. Right now (winter and snow) it still works, more or less.

 

[Looking4new]

The shop that I sent the tractor to (not the one 5 miles away) told me that there was an O-ring on the suction side of the pump that needed to be replaced. That is why it was sucking air. I got them to do a bunch of other work, too. Adjust valves, change oil and filter, replace all filters except fuel and air. The tractor comes home on Monday. I have a towing company local to me that floats where I need it to be. Because I live near a controlled access highway I cannot drive it to the place. That controlled access highway is the only way to get to the shop. The good thing is that I dodged a $1900.oo bullet ( the price of a new pump).

Many thanks for the replies.

 

[SmallChange]

Flow = Speed
Pressure = Power

Actually,

Flow/Piston Area = Speed
Pressure*Piston Area = Force
Speed*Force = Power

 

[5030]

Reading along, something that has never concerned me at all. Both mine leak down and loaders drop and always have and I ignore it becuuse it only happens over a prolonged period of time and all it takes to correct it is a nudge to correct plus when parked the loader buckets are on the ground, where they belong in the first place as well as anything on the 3PH. Been that way since new, 20 years ago and not of concern to me. It's a tractor, not a silk purse.

 

[Looking4new]

When I park it, the loader and 3 PH are almost always on the ground. What alerted me that something was amiss was the jerky raise and then the floppy bucket on the curl.
Hopefully it is all fixed.