How to properly operate a db 995 loader

[DeanB]

I'm trying to get to know how to properly use my loader on 995 now I've fixed the hydraulic system as before someone had made it so the hydraulics would only work the loader and nothing else, so far all I know is I have to somehow send fluid to the front of the tractor to the loader to get it to work. Not sure if I did this properly but I've got the 3 way valve in position 1 which is the feed to the loader and put the selectamatic lever all the way to the top at the select point and have the 3 point linkage stowed in the up position and then the loader will work but only slowly. Any other settings and the loader doesn't move is this correct or am I not doing it right.

 

[Exfarmer]

Have not got a manual so working from memory of a long while ago.
i think the linkage should be set in position just below the top, ideally using the lock to hold it up.
then the 3 way valve should be in the 3rd notch from the right , sitting on the seat.
the selectamatic lever set behinf the seat on the right , should be turned to the furthest right position ( remote TCU) after pulling the main hydraulic lever back and locked in place.
i assume you have cleaned the hydraulic filter under the gearbox and the pressure filter on top of the axle is new.
if none of this helps , it is worth asking the question on the DBTC forum

 

[DeanB]

I've changed the fluid and filter but I'm not sure about the pressure filter where whould I fine this

 

[Exfarmer]

I've changed the fluid and filter but I'm not sure about the pressure filter where whould I fine this

The pressurefilter is down the side of the seat , not sure all the early tractors had them

 

[Flat 10]

@Selectamatic

 

[Selectamatic]

@DeanB There are several different setups...

Take some photos of the hydraulic controls in the cab (if it has one) as well as the loader controls (if it has any...)

Post them on here, we'll take a look.

 

[DeanB]

This is what is was trying to lift, cant weigh much past half a ton. The cable tie is to hold the lever in select

 

[Selectamatic]

Thats looks right, I recon the three way valve is in the wrong position though...?

Looks like what your lifting is too much for your loader... poor front axle will be getting some grief...

Nice brake pot lid...

 

[ridger]

Thats looks right, I recon the three way valve is in the wrong position though...?

Looks like what your lifting is too much for your loader... poor front axle will be getting some grief...

Nice brake pot lid...

I think it's wrong as well it should be in middle?

 

[DeanB]

The loader should be able to manage about 1 ton I think the back actor is about half that. The three way valve is set to position 1 out of 1, 2, L1 and L I've checked and the loader is definitely in port 1 of the valve. If the loader is having trouble, when I finally get the back actor on the linkage will that have any problems lifting

 

[Selectamatic]

Ok, your levers are all in the right place...

Your pump could be failing, or your relief valve...

It might be time to get the pressure test gauge out...?

 

[livestock 1]

Dump valve stuck?

 

[Boohoo]

I think that back actor will weigh more than half a ton. How are you trying to lift it? Any attachment on the loader adds weight and pushes the weight forward, reducing the lift capacity. If your loader has single acting lift rams it should lift 950kg, double acting lift rams should lift 1225kg.

 

[DeanB]

In my previous posts I've had trouble with the control valve but I've checked this replaced it the correct way and checked all the valves are moving freely so I dont think this is the problem. I've replaced the filter and fluid plus about 3 litres past the red dot for the loader. But before all this when the control valve had a missing lube pipe and the rod was dissected from the selectamatic lever the loader had loads of power and would work with the three way valve in any position. I've looked up the way to test the pressure and it says I need a special u shaped pipe to insert into where I can put a return hose for the back actor when I fit it and a gauge. They range from £8 to £50 on ebay I dont know about the u shaped pipe this must be a db special

 

[Selectamatic]

Was the loader plumbed into the 'camels hump' on the back left hand side? If so, it would have been direct from the pump...

I still think your asking a bit much from your loader, that backhoe will be heavy and cumbersome. Does it lift lighter loads ok?

I cant think where your special U shaped pipe fits... i've never used one, plumb a gauge into somewhere.

 

[DeanB]

The loader return pipe is plumbed into F in the last pic, the loader will pick a builders bag of logs but only in full engine revs and when I finally plumb the back actor in it will be to the camels hump 2nd pic E

 

[Boohoo]

Isn't the rear, upper port on the camels hump a test port? Should get full flow from the pump there. The tipping pipe should give a reasonably good indication of hydraulic system health. Maximum pressure is 136 bar and maximum flow is 22.7 litres/minute.

 

[Selectamatic]

F in the last pic is the return port. Good that it's in there, as just dropping the return oil in through the filler or similar starves parts of the gearbox from oil.

Don't worry about the U shaped pipe, any pipe or hose will do, the gauge is the important bit.

If it will only lift at full revs, i suspect your pump or relief valve...

 

[Selectamatic]

Isn't the rear, upper port on the camels hump a test port? Should get full flow from the pump there. The tipping pipe should give a reasonably good indication of hydraulic system health. Maximum pressure is 136 bar and maximum flow is 22.7 litres/minute.

Yes, or it could be used as a feed for constant pumping implements...

 

[DeanB]

So if I get a gauge capable of 3000 psi and connect it via a hose to the tipping pipe or a threaded connection to the high port the camels hump and see what I'm getting first before I assume a bad pump