46A Loader Chatter Shudder

[bigfatricky]

Hi Folks,

Put a 46A loader on my 3010D and I have a question about the return line from the loader control valve. I had asked about the plumbing for this job in a previous post and was handily supplied with pictures from Tx Jim (thanks!), where it was recommended that I go to the rockshaft return line or a ported filter cover.

I called the dealer to ask about getting a ported filter cover to plumb the control valve outlet to. They said "why don't you just put to the sump return hole right above the pto shaft?" I said "sure, good idea!"

Loader works with that setup, but it chatters like crazy during all functions. My question is this: Does plumbing the control valve outlet line to the main return line (the one that goes from the transmission pump to the main pump) work better? Is the chattering a result of the trans pump not being able to keep up with oil demand, starving the main pump? Does the pressure from the control valve outlet "bypass" the trans pump and therefore create better supply pressure to the main pump? It seems to work better with the trans pump engaged.


Just wanted to see what you all thought on this before I charged into tearing back apart. Thanks a bunch

 

[long green line man]

Frist, Service manager [ or who ever at dealer ] is telling you return oil to sump, Is just showing there inexperience with closed center hyd. systems [ now obsolete on JD's] ; Second, Returning oil to fitting at rockshaft return line[ see pic, same pic Tx Jim put in your first post " Plumping 46A loader on 3010"] puts oil back to return line 'to' front pump;...JD parts has fitting AK40464 /Sub AT28379, $19. a small fraction of cost of ported filter cover.. Third, And yes it will work better, Is should help with the chatter on loader, BUT' you may still need to check flow from tran. pump; and or check and set standby pressure from main pump to 2350 psi. [use gage & fitting at rear remote,] adjust with stroke control valve on main pump.. ... I'm sure by now you have changed tran. filter , cleaned screen & have full, clean, supply of oil in trans-hyd. system!!!!! .../there are some other things can be done after these... I'm sure other form members can help more than I...

 

[kjh_1977]

We have had a 46 a on our 3020 for 40 years dad bought new great loader we love it!!!

 

[Tx Jim]

Ditto what l g l m stated. Returning hyd to RS oil return or ported filter cover is the best way for FEL ind valve plumbing for best operation