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Author Topic: Valmet 546 harvester  (Read 773 times)

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Offline mike_belben

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Re: Valmet 546 harvester
« Reply #20 on: September 15, 2020, 09:41:26 AM »
With a pressure gauge. 
Revelation 3:20

Offline Angrybeaver94

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Re: Valmet 546 harvester
« Reply #21 on: September 15, 2020, 05:01:43 PM »
I know I was just wondering if I should t into a line? I tested the main pressure on the valve banks like the book tells me and Iím getting 2800 on the left and 2700 on the right valve bank. I tried adjusting the left up to 3000 but when I turn the screw no improvements, so I guess my question is could I t into a line and c if Iím losing pressure at the valve bank? Or if how I tested it means my pumps weak? Unfortunately i donít have the service book for the machine just a operators manual tht gives me some pressures but doesnít go much into detail about testing other things. 

Offline mike_belben

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Re: Valmet 546 harvester
« Reply #22 on: September 15, 2020, 10:07:05 PM »
Can you pull any part numbers or logos off the component itself?  Valmet likely did not make the pumps and valves, but whoever did will have a phone number and someone to talk tech with if theyre still in business.  I would try to ID the pump mfr if possible and get the procedure and specs straight from them.  Theyre the pros.


Chances are it will involve putting a very expensive inline flowmeter in series to check gpm under load, and case drain leakage.  Worn pumps leak more fluid back to tank than tight ones but it takes a meter to quantify.


Remember pumps only make flow.  Resistance to flow makes pressure.  Just because you cant get over say 2500psi does not automatically condemn the pump, that could easily be the maximum pressure that the circuit can contain due to a worn valve or relief spring getting tired.  Without seeing the pumps performance in gpm@X psi and comparing to a mfr chart, it is hard to measure how spanked a pump is.  Often easier to disassemble and look inside.  
Revelation 3:20

Offline Angrybeaver94

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Re: Valmet 546 harvester
« Reply #23 on: September 15, 2020, 10:28:07 PM »
Ok thank you that makes sense. 

Offline snowstorm

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Re: Valmet 546 harvester
« Reply #24 on: September 16, 2020, 06:36:26 AM »
the best way is with a flow meter. with that you can load the pump and see psi and gpm. i already told you what brand of pump. 29gpm per section. 2" gears??

Offline Angrybeaver94

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Re: Valmet 546 harvester
« Reply #25 on: September 16, 2020, 11:09:16 AM »
Yes you did. Did u run a 35 gpm pump on ur 546? Just wondering because if it comes down to a weak pump I would like to try the bigger pump like you suggested 

Offline Gary_C

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Re: Valmet 546 harvester
« Reply #26 on: September 16, 2020, 04:39:10 PM »
That 546 was underpowered with that 4 cylinder Ford engine so upping the GPM's may be a losing proposition. Best to just make what you have work like it should.
Never take life seriously. Nobody gets out alive anyway.

Offline Angrybeaver94

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Re: Valmet 546 harvester
« Reply #27 on: September 16, 2020, 09:21:46 PM »
Yea they are underpowered for sure. Unfortunately Iíve owned the machine for a little over a year and have yet to figure out this issue with it. Most the time I just resort back to the chainsaw because I canít afford to sit and tinker on it, especially because I am really not that good with hydraulics and I donít know anyone around me that is either. You guys on here have been a lot of help. Just hoping I can figure this thing out soon because at this point itís not worth much too me. Pretty sad when I can out cut my harvester with my chainsaw In harvester size wood.  ::)


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