noisy hydraulic pump

   #1  

BertZegers

Gold Member
Joined
Jan 2, 2012
Messages
261
Location
South-West Ontario
Tractor
Kubota L2900, Zetor 8011, Kubota KX41Excavator, John Deere 4400 Combine, Case 1816C skidsteer
The hydraulic pump on my Zetor 8011 has become noisy because of an wrongly adjusted relief valve ( was turned in all the way against the spring)

The pump is easy to take out. Does it make sense to take it out to clean and inspect it? I think it is a gear pump.

How do I clean the system from debris? I found some metal in the relief valve.

Thanks for your insight.
 
   #2  

CJONE

Veteran Member
Joined
Feb 7, 2012
Messages
1,485
Location
Northern Michigan
Tractor
KIOTI DK50 HST
Yes, pull the pump clean and inspect it, my educated guess is you will find wear/gouging in the intake side from the gears deflecting from overpressure.If the bearings are junk on the idler shaft [another symptom of overpressure] you will have to fix the pump now. If the pump will still run, clean the tank and filters, filter the old oil and put it back together with the relief adjusted down and run it to get the rest of the junk out of it. Then fix the pump, change filters and oil, adjust the relief down then bring it up to spec. and you will be good to go. The only other way to clean the system is to disassemble it. CJ
 
 
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