2003 New Holland TC40 16LA loader Open or Closed System

[cdiller]

Can any one tell me if a 2003 New Holland TC40 with a 16LA loader has a open or closed hydraulic system?


Tractor is Shuttle Shift not Hydostatic

Regards

 

[CincyFlyer]

I couldn't find anything on this, but most small tractors use open center hydraulics. But most isn't all.
How many hose connections to the loader valve? Two for lift, two for curl, then ... ? Does the valve say "PB" near one of the outlets? An open center valve may have one or two outlets (if only one, to let pump output return to tank, and to dump the "backside" of the cylinders to tank, if two, then one is the cylinder dump, and the other is "Power Beyond", a continuation of pump flow for further valves downstream.) A closed center valve generally only has the working ports, an inlet, and a return to tank for the cylinders.
If you post a picture of the valve I'll guarantee you'll get an answer quickly.

 

[RickB]

Open.

 

[cdiller]

I couldn't find anything on this, but most small tractors use open center hydraulics. But most isn't all.
How many hose connections to the loader valve? Two for lift, two for curl, then ... ? Does the valve say "PB" near one of the outlets? An open center valve may have one or two outlets (if only one, to let pump output return to tank, and to dump the "backside" of the cylinders to tank, if two, then one is the cylinder dump, and the other is "Power Beyond", a continuation of pump flow for further valves downstream.) A closed center valve generally only has the working ports, an inlet, and a return to tank for the cylinders.
If you post a picture of the valve I'll guarantee you'll get an answer quickly.

Picture attached

 

[CincyFlyer]

I'd guess open center from the valve picture, but RickB has answered in any case! I'll assume that you are gonna add something to your tractor-have fun!