6718 with quicke 2030 loader

People,

My 6718 is fitted with a quicke 2030 loader which has served us fantastically well.

However, it struggles to lift 500 KG,s and as most bagged fertiliser comes in 600KG big bags, it makes life interesting with a bucket to say the least.

Is the weight that the loader can lift limited by either the output from the hydraulic pump, the size of the pipe servicing the loader or the size of the main lift rams fitted to the loader which are smallish.

Or is it that this is just the capacity of the loader. I'm sure that some of you will recognise that turning the steering wheel with 500KG's on the loader is like turning an oil tanker!

Thanks all.

People,

My 6718 is fitted with a quicke 2030 loader which has served us fantastically well.

However, it struggles to lift 500 KG,s and as most bagged fertiliser comes in 600KG big bags, it makes life interesting with a bucket to say the least.

Is the weight that the loader can lift limited by either the output from the hydraulic pump, the size of the pipe servicing the loader or the size of the main lift rams fitted to the loader which are smallish.

Or is it that this is just the capacity of the loader. I'm sure that some of you will recognise that turning the steering wheel with 500KG's on the loader is like turning an oil tanker!

Thanks all.

Click to expand...

The laws of physics will determine what you can lift. The load must be counterbalanced by the weight of the engine and rear axle. The law of the lever applies. A 6718 weighs 2835kg, assume 2500kg for counterbalance then:
(600kg load + 250kg loader) x 2.0m is less than 2500 kg x 1.5m
so you loader should be able to lift 600kg assuming your loader is meaty enough.

Once this criteria is satisfied its over to the hydraulic pump.

Can you put a pressure gauge on to check the output pressure of your hydraulic pump?

If you have a worn hydraulic pump or other hydraulic leakage then your lift capacity will be reduced. How hot does your oil get? What type of oil is it? If its getting very hot and is a cheapo, then your lifting capacity will reduce dramatically. A change to more expensive multi grade oil for the hydraulics will help.

Your pump should generate 130 bar and with 2 lift cylinders of 75mm diameter, then you should be able to lift a ton easily with your front loader.

Thanks for your help Tom,

We use 15/30W super universal tractor oil in the back end, I think its called Magnol, although we have had Vapormatic's own branded in the past.

I'll check for leaks, and report back, however the return tapping on the top of the hydraulic unit (used for the trailer tip) was slightly loose (less than quarter turn) (although because its under the seat we couldn't see it!
Would this make a difference as its not on the same circuit?

I'll check the Ram diameter and let you know.

As I've said in my latest post, the magnetic filter was clogged, and has now been cleaned so would this make a difference, along with a fresh oil change?

Thanks again for your assistance.


James

The only reference I could get for Magnol was to do with Morris. Seem like reputable oil.

The trailer tipping pipe will not affect this problem.

Cleaning the magnetic filter will help. Is there a wire mesh filter that you can clean as well? This should be located near the pump/

Is your pump OK? Does the 6718 lift a loaded transport box OK? Can you check the output pressure?

We use nothing but Magnol in everything except power steeering and brakes.
You check the pump pressure by attaching a guage to the trailer tipping coupling, pressure as Tom says. engine revs should be 1500 . If pressure increases significantly after these revs then there is either an internal leak or the pump is not up to it. First thing to do after that is to check the relief valve, if you had metal on the magnet its possible that a piece is on the seat of the valve preventing it closing, it will never flush out because there is not enough pressure to lift it, so it will have to be dismantled, and reset or replaced.
Sorry, but its 20 yrs since I worked on a 6718 so someone else will have to tell you where the relief valve is, but I think its on the pump plate.
Dave

Tom and Dave P,

Thanks for your help!

I've been over to see a guy called Dave Jone in Mold , North Wales, who has been working on Zetors for years (an absolutely top bloke by the way), who just happened to be scrapping various bits of worn out zetor.

He has explained ( and shown me on one he had prepared earlier!) where the lower filter is located next to the hydraulic pump, and also shown me how to drop the plate, adding some useful tips to watch where the bolts come out and go back as one is obviously bigger but rather cunningly another is onlymarginally longer than the others, possibly leading to sheared bolts and a load of grief for the unwary!

He has also explained that the quicke 2030 loader is limited in particular by the position of the main lift rams and that they start off virtually horizontal. He recalls carrying out some mods in the past to change the location of the ram on the bracket to alter the geometry and this helped enormously, but I don't think we'll go that far!

Tom, in answer to your earlier question, the rear lift arms will lift our 6ft grays pasture slitter without any problem, even when full of water and loaded with concrete blocks in the weight frame. (possibly around one tonne). That said, I think they should lift around 1700KG's but have never had to do so!

The rams to the loader are 70mm OD.

I'll check the output with a pressure guage tomorrow.

I'm now confident that I can check the filter next to the hydraulic pump when the oil is dropped, without causing anything terminal and hope that there is nothing more sinister than that and fresh oil needed !

Dave also explained how to get at the lift piston located under the top hydraulic cover, to stop the recycling at full lift and it was useful ( frightening) to see how heavy the cover is and as yer man Renze has said in replies to earlier posts, you really need to prepare well to remove it to prevent damage to anything underneath. A job for another day methinks!

Thanks again for your help!


James