F Dean or anyone on the belley pumps

Picture 3 red marked pins. that lever moves when operating rod moves. Center pin pivot. Rear pin moves piston to close off bypass for pump pressure or open to sump. front pin moves the lever that lets unit out let pipe pressure back to sump. Notice 2 pins with yellow marks in front. One pin releases the check ball for the lt. rear opening and the other one releases the lt. front and right openings. Notice lever is made so one pin is pushed before the other. Hard to feel when operating with out a load on the check balls or a worn unit.
Picture of pump unit, oil comes in at the squared part and pressure out to the channel and over to the two silver balls. If the operating lever is pulled back pressure pushes the spring loaded balls in so pressure goes to the outlet ports. These are the same balls the pins push in to let oil back to the sump from the outlets. Ball with red mark near it goes to left front and right outlets. Yellow to left rear outlet.
Since both balls see the same pressure from the pump all the outlets have the same pressure. Unless a delay lift valve is used or when lift cylinders are used on a outlet and they are a different size or lifting a different load. Then the cylinder that needs the least pressure to lift will go to the end of travel before the next one lifts. If a gauge were put in all three blocked outlets on the unit and it was set to pump all would see the same pressure almost instantly.
Tried to make this short as I could so it may not be explained good enough, questions ask.

That should put this continuous discussion of delayed lift to rest, for anyone who sees your post anyway. Seems to come up quite regularly on here and other forums.

Start at about the 5:25 up to the 6:05 mark or so point in this video, and explain why the fronts came up, THEN the rears came up. Even says so.
Check this video.

Because they used what IH called a delay lift valve. Small valve that screwed onto the cylinder or outlet to cylinder and the pressure in the system had to build up to a certain point before fluid was sent to the cylinder. May not be exact just going by memory, early ones needed between 200 and 300 PSI and later ones 400 to 500 PSI before the pressure went to the rear lift. By that time pressure was reached the front ones had raised to the end of there stroke.

(quoted from post at 17:31:38 09/20/14) Because they used what IH called a delay lift valve. Small valve that screwed onto the cylinder or outlet to cylinder and the pressure in the system had to build up to a certain point before fluid was sent to the cylinder. May not be exact just going by memory, early ones needed between 200 and 300 PSI and later ones 400 to 500 PSI before the pressure went to the rear lift. By that time pressure was reached the front ones had raised to the end of there stroke.

Click to expand...

Thank you for that explanation. Sadly, there will be several folks who won't see this, and will still be determined that the left rear port is a "delay" port.

John if you stop the video at 5:32 and look toward the battery the delay lift valve is on top of the cylinder. Has the hydraulic line coming forward then hooked to the delay lift valve. Valve makes a 90 into the cylinder opening and has a cap on the forward end.
Adding another picture of pump cover. Red line covers the oil out of pump gears channel shown in a previous picture and shows end of pins that push check balls off there seat. Also shows the hole that is open to sump when not pumping or closed for pressure to the check ball openings.

OK! Now I recall that valve, but it wasn't on Dads cultivators. Im wanting to say it was on the cylinder he had on the B20? offset harrow. That makes sence as to why it was slow to lift, to me anyways, so maybe Dad did it on purpose for some reason.