New Holland skid steer boom/bucket lock solenoid diagnostics.

‪@BrassBuilder‬ had a problem getting his New Holland L220 skid steer boom and bucket functions to operate, but because he can't raise the arms, he can't tilt the cab to get at the suspected problem. You could loosen the arm cylinder hoses and raise with another machine, but what a mess and dangerous!
Lets look at the boom and bucket lock solenoid system and see if there is a way to pinpoint the problem, and bypass it so that the arms can be raised under their own power.
The bucket lock solenoids are interlocked by the:
Key switch to ON
Run/Service switch to RUN
Operator in seat (seat presence switch)
Seat belt fastened (seat belt switch)
If these conditions are met, the pedals should be free to move.
The solenoids are powered by the digital dash display (EIC), (pin 14 on the L175). It should be possible to inject 12V at this pin to force the solenoids on for testing. The solenoids are powered by a 15A fuse in the fuse panel.
If the machine has the "advanced instrument panel", there is a service mode you can enter that will allow you to do input and output tests. You can use this to test the set and belt switches, and the output to the solenoids.

[@BrassBuilder]

Daaaaannnngggg Carl! What a video! For the record I'm the dude Carl is referring to as the gentleman in the video and Mike is the name. This actually raised more questions.
1. My panel was not showing a fault number/message. This tells me that a wiring connector did not get blasted loose during the 1.5hrs of the power washing nor the 4.5 hrs of garden hose washing.
2. My pedals work and my cylinders work to the extent that the arms move about 3/4" and the bucket cylinders move just ever so slightly.
3. My hydraulics unlock light (7,8,9,0) keeps blinking at a steady pace but park brake goes off and I can drive the skid steer just fine. Two speed works.
4.I just could not safely get those arms up to get me cab tilted. I have two friends with skid steers, but both of them had them out of town and I wasn't going to bother them hauling them in to lift my arms for this. So...really no way to check out the solenoids.
5. From the pictures and the locations of the lockout solenoids, I can tell you, I spent a *LOT* of time spraying water up towards the front under the cab when I was cleaning all the cow crap out. And I mean a LOT of water. Both high pressure and garden hose.
6. There are also some diodes under the cab that controls some stuff doing with the lockouts too...or so I read somewhere in one of the manuals I have here. I have a full set of manuals available either digital or print. Still trying to learn where to find stuff in them.
Like I said in the other video...all of this is rather mute now...the local NH dealer picked up the skid steer on Monday...but maybe this info will help some other poor L220 owner.
Thanks again.
Mike

[@BrassBuilder]

Well the New Holland mechanic is even stumped now. I found out the arms are raising by the toe press on the foot pad and lowering by the heel. So another mystery.

[@thinkb4umove157]

Good day. Can you please tell us the name of the book you have and where to find it. Thanks

[@gerardocallente1931]

Where can I get thos blue prints?