Farmi 260 Chipper

[N1ck]

We have recently upgraded our Farmi CH260 chipper so that the feed rollers run off a separate tank and pump mounted under the pto so that we can crane feed it. We have also installed the up to date no-stress control box.

 

So far we are just tinkering with it and haven't used it in anger but we are noticing that the feed rollers seem down on power or 1 or both stop rotating when feeding. This doesn't seem to be the no-stress kicking in. It's a bit frustrating as the feed rollers were always good and strong when run off the spools, we just couldn't use the roof mount at the same time as that also runs off the locking spool.

 

The belt to the independent pump is tight and we are using the recommended grade of hydraulic oil. Could the hydraulic pumps on the feed rollers have air locks or dirt in them? Is there something we are missing when setting up the RDS control box that would cause this? Any advice welcome. Cheers.

[openspaceman]

Have you put a pressure gauge in the feed from the independent pump?

[GarethM]

Can you fire it up without the stress control and power the hydraulic solenoid valve directly ?.

 

Just thinking it might not be getting full voltage to the solenoid from the new stress control box, if you can it rules out faulty solenoid, low pressure pump or dirt in the system. Don't know if they have a hydraulic filter, if that's been changed and did you use the correct micron size.

Edited October 3, 2022 by GarethM

[N1ck]

8 minutes ago, openspaceman said:

Have you put a pressure gauge in the feed from the independent pump?

I was thinking this might be the next step. There is a port for a pressure gauge on one of the feed rollers. I think maximum pressure is 170 bar.

[GarethM]

Was the pump you got from farmi ?.

Plus, forgive the stupid question but you are running it at 1000 on the PTO.

 

I've a pto TP chipper, you do occasionally hitch up and forget to use the right speed.

[N1ck]

10 minutes ago, GarethM said:

Was the pump you got from farmi ?.

Plus, forgive the stupid question but you are running it at 1000 on the PTO.

 

I've a pto TP chipper, you do occasionally hitch up and forget to use the right speed.

Yes it's the HD11 hydraulic unit from Farmi and we were running it at 1000rpm.

[N1ck]

32 minutes ago, GarethM said:

Can you fire it up without the stress control and power the hydraulic solenoid valve directly ?.

 

Just thinking it might not be getting full voltage to the solenoid from the new stress control box, if you can it rules out faulty solenoid, low pressure pump or dirt in the system. Don't know if they have a hydraulic filter, if that's been changed and did you use the correct micron size.

I suppose I could reconnect the old electronic controls and solenoids to the feed roller valves as this would rule out any interplay with the no-stress - I still have them somewhere.

[GarethM]

Dumb thought, is it getting enough power via the trailer lights plug ?.

 

As I guess you need to leave your lights running whenever chipping.

Edited October 3, 2022 by GarethM

[N1ck]

18 hours ago, GarethM said:

Dumb thought, is it getting enough power via the trailer lights plug ?.

 

As I guess you need to leave your lights running whenever chipping.

The new control box has a dedicated 3 pin 12v feed. I should think it is getting enough power as the solenoids are working (an orange light comes on).

 

There are 3 solenoids, rollers forward, rollers reverse and dump valve. Our hydraulic block doesn't have a dump valve so that one is redundant.

[GarethM]

Having repaired a lot of tractors over the years, I've learnt to always start at the simple things as they're usually also the cheapest 🙂.

 

Was the hydraulic block OEM aswell, just thinking if the port opens to feed oil to the roller is the return pipe from the roller able to feedback the oil to the tank ?.

 

As both rollers are connected together, one solenoid directs oil in, the other solenoid should direct oil out. Hydraulics are a hard subject to describe.

Edited October 4, 2022 by GarethM