3320 rockshaft doesn't rock

jdjllee · Jun 21, 2009

Why won't my the rockshaft move up or down? The tractor has a 375 hoe installed when I bought. Does the rock shaft not work with hoe installed.
opened drop speed valve all the way at bottom of seat. Nothing happens when I move the move the lift/lower lever. No hydraulics noise no nthing.
Is it disconnected with the hoe in place?

KB9UDE · Jun 21, 2009

The rockshaft will not work with the hoe installed. When you take the hoe off and hook up the short hyd hose loop it will work...

John

Cocre · Jun 21, 2009

Actually the rockshaft does work (or should work) with the hoe installed. You are supposed to use the lift to remove the hoe. With the hoe mounted and set to be removed, shut down the tractor, remove the two hydraulic quick disconnects that supply and return fluid to/from the hoe. Connect the one tractor attached hose that should be laying on top of the PTO cover (or there abouts) to the tractor attached fitting on the right rear, it makes a quick loop. Put the rubber covers on all the other fittings. Crank the tractor up and remove the hoe using the rockshaft lift.

At least that is the way it is supposed to happen. If you have issues, I wrote some details on my method in a previous thread.

CinderSchnauzer · Jun 21, 2009

The Rockshaft is used to mount and unmount the BH. If the BH is on, position the BH bucket as per the manual then the two Power Beyond hoses need to be disconnected from the BH and then the loop hose that will be lying there loose needs to be plugged into the PB circuit. Now use the Rockshaft control to raise the BH slightly - remove the L-Pins and lower with the Rockshaft control

jdjllee · Jun 21, 2009

Ok guys thanks. I saw that disconnected loop there but didn't know what it was for. For some reason I thought the rock shaft would be plumbed up internal. Maybe I better read the manuals a little better.

sdicesare · Jul 2, 2009

jdjllee said:
Ok guys thanks. I saw that disconnected loop there but didn't know what it was for. For some reason I thought the rock shaft would be plumbed up internal. Maybe I better read the manuals a little better.

I read the entire thread on the 3320 rockshaft. I have a similar problem on my 3720, and I have connected the hoses as described. Rockshaft still will not move up or down. Rate of drop control is in mid-range. The machine has 20 hours total.

Cocre · Jul 2, 2009

With the backhoe hydraulics disconnected there is only one hose to connect. It makes a loop and connects right above where it plumbs from. If it is connected correctly, disconnect it and reconnect it again. Make certain that the quick connect is locked. It may look connected and not be.

The rate of drop knob has no impact, on the lift only the drop rate.

sdicesare · Jul 2, 2009

Cocre said:
With the backhoe hydraulics disconnected there is only one hose to connect. It makes a loop and connects right above where it plumbs from. If it is connected correctly, disconnect it and reconnect it again. Make certain that the quick connect is locked. It may look connected and not be.

The rate of drop knob has no impact, on the lift only the drop rate.

I have repeatedly connected and disconnected the one hose to which you refer. The collar on the female disconnect snaps forward and a stiff pull cannot remove it.

kennyd · Jul 2, 2009

sdicesare said:
I have repeatedly connected and disconnected the one hose to which you refer. The collar on the female disconnect snaps forward and a stiff pull cannot remove it.

There are two "return" fittings that the PB hose can plug into...one bypasses the 3PH and goes directly to the tank, the other feeds the 3PH and is used when the hoe is removed.

sdicesare · Jul 2, 2009

kennyd said:
There are two "return" fittings that the PB hose can plug into...one bypasses the 3PH and goes directly to the tank, the other feeds the 3PH and is used when the hoe is removed.

The PB that is on my 3720 has only two fittings. One is the pressure fitting (looking at the tractor from the rear looking forward it is on the right) It is a female quick connect. The other is a male plug, which is the return fitting (looking at the tractor from the rear looking forward it is on the left). John Deere says that the return fitting is not used when the hoe is removed. It should be capped. So I really don't see where the "second of the two "return" fittings as you describe are located. If you could she some light on that, it might solve the problem. Thanks