Rich Waugh
Platinum Member
Greg wrote, "Pretty sure the QD comment relates to the 200 Series. There's a QD on a short pigtail that comes off the main pump. Can't remember if that applies to the 300 series or not."
The answer is yes, it does. As long as this is a two-pump system it is the same. There is no relief valve, per se, in the lift box as far as I have been able to determine.
To answer the questions about RanchHand's loader valve kit:
a) - NO, there is no separate return to tank line - it goes to the lift box (sump) as designed. Open center system, so this is fine.
b) - No. Again, this is an open-center system so the flow past the loader valve operates the lift box. Fluid is always flowing through the loader valve until use of one of the control valves diverts it to the loader cylinder(s). Then it flows through the cylinder(s) and on to the lift box.
c) - loader relief valve dumps to the return line, which is to the lift box (sump).
Give Ronald a call to clarify all this - he's a really helpful guy who is a terrific mechanic for these tractors.
The answer is yes, it does. As long as this is a two-pump system it is the same. There is no relief valve, per se, in the lift box as far as I have been able to determine.
To answer the questions about RanchHand's loader valve kit:
a) - NO, there is no separate return to tank line - it goes to the lift box (sump) as designed. Open center system, so this is fine.
b) - No. Again, this is an open-center system so the flow past the loader valve operates the lift box. Fluid is always flowing through the loader valve until use of one of the control valves diverts it to the loader cylinder(s). Then it flows through the cylinder(s) and on to the lift box.
c) - loader relief valve dumps to the return line, which is to the lift box (sump).
Give Ronald a call to clarify all this - he's a really helpful guy who is a terrific mechanic for these tractors.