Leejohn
Elite Member
Here is a parts manual. Look under control valve and safety valve.
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kubota l3250 new toy, restoration, 3 point linkage fault
- Thread starter oil burner
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- kubota l3250
OP
oil burner
New member
many thanks I have just discovered I can power up link arms through loader sp valve but have to lower them with position control lever I suspect the problem may be with pos control valve
OP
oil burner
New member
many thanks I suspect the problem is with the control valve as i have just discovered link arms can be powered up through loader spool valve but must be lowered with control valve . I have dabbled with mechanicals all my life landrovers etc but tractor hydraulics are new to me regards neil
OP
oil burner
New member
my efforts with the tractor are limited to when I have the time (the same with my IT skills ha ha ) however I have just discovered I can power up the link arms through the loader sp valve but have to lower them with the position control I therefore think the problem is with the p c v would you agree ? kind regards neil
Neil, what do you mean by this? What is the "sp" valve?...the loader sp valve...
Something definitely doesn't seem right - Do you have a photo of the valves in question or the area in question, that you can post here?
(Just in case you don't know how to post a photo... Also it depends on how you reply to the thread, there is an area below where you hit the "Submit Reply " Look for "Manage Attachments"... if you need more help with that, let us know...)
View attachment 520027
OP
oil burner
New member
hi there by sp valve I was referring to the loader spool valve (only one lever) I have now removed the top cover from the back end and carefully dismantled the pos control valve but cant see any obvious problem so I am now a little stumped
OP
oil burner
New member
I have now dismantled pos control valve beneath top cover but cant see any obvious problem and so now am a bit stumped
You said that "...however I have just discovered I can power up the link arms through the loader sp valve..."
So, to make the arms go up, you work the loader and the three point linkage or just working the loader will make the arms go up?
Normally the loader Spool/Valve; the plumbing is High pressure goes into the loader valve labeled "P"... stands for pump (high pressure input) and "T" stands for tank (low pressure return to reservoir) There is also, "PB" for Pressure Beyond (high pressure to power your 3 point hitch). There is also 4 port for the lift and curl, those should not be the problem. Can you confirm that the loader valve is plumbed correctly?
So, to make the arms go up, you work the loader and the three point linkage or just working the loader will make the arms go up?
Normally the loader Spool/Valve; the plumbing is High pressure goes into the loader valve labeled "P"... stands for pump (high pressure input) and "T" stands for tank (low pressure return to reservoir) There is also, "PB" for Pressure Beyond (high pressure to power your 3 point hitch). There is also 4 port for the lift and curl, those should not be the problem. Can you confirm that the loader valve is plumbed correctly?
Leejohn
Elite Member
Teg I'm with you. His work ports return is feeding the 3pt. and the PB is going right to the sump.
