Thanks Jim for the info,I don't think the parking brake works,as the remote lever,the loader is working off the remote on the right side under the seat,can I dead head the lift mechanism on the loader to try to free the splitter valve or relief valve?Thanks Joe
Jimb2 said: (quoted from post at 19:37:06 05/26/10) Hi Jack, does the parking brake work? Most
hydraulic problems on 74 series tractors are
caused by someone driving the tractor with the
parking brake engaged and the parking brake band
gets ground up into the hydraulic oil. The brake
band bits clog up the hydraulic filter and then
the bypass valve opens allowing the hydraulic pump
to pump the bits all through the system. These
tractor only have one hydraulic pump and the
reservoir is the transmissions and the rear end.
It does not hurt to over fill by 5 gals especially
if a loader is installed.
On 574 the hydraulic pump outputs 12gpm and the
MCV valve splits this into 9 gpm for 3 pt, remotes
and loader, the other 3 gpm goes to power
steering, brakes and PTO.
The problem with your 574 would appear to be a
stuck splitter valve in the MCV valve. It is stuck
in the position so all 12 gpm is going to 3pt,
remotes and loader. Sometimes it can be unstuck by
pulling the remote outlet lever until you hear the
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