Code EHO 21 has come up on our 8420 tractor resulting in the front hydraulic suspension failing to pump up

SOURCE: My recently purchased used MT180HD tractor will

hi there joedorava

is there input to pumps , are there any leaks in the system either oil / air

have you purged all the air from the hydro units and wheel motors

if air is entraineed in oil , you may get alot of noise from caviatation in the pumps and wheel motors also heat , and vibration and no movement until all the air is gone
top up oil to correct level

caviatation can be quite destructive on pumps etc

i assume you used the correct hydraulic fluid for the unit in question

have you checked changed hydraulic filters when changed hydraulic fluid ?

other than that cant give any more info

cheers pauly46

SOURCE: JD 4020 Row Crop Tractor; No power Steering, No

In regard to the problem - JD 4020 Row Crop Tractor; No power Steering
What was the problem and how did you fix it I'm having a simlar problem

Dennis Key

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You may have to take the bottom of rad. loose so you can belt in. Sure be able leave hoses connection.

Dennis Key

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SOURCE: i need to rebuild a hydraulic pump for a 2510 john deere tractor

Best to a rebuilt pump. Tested and etc. Be sure
you a warrany.