I want to move my 48 foot storage trailer with a bucket loader, just
pick it up and push it back. I have the wheels chocked right now. Do I
need to put air into the reserve tank to release the brakes or can I do
it manually or are they off without air or what?
If I remember correctly from reading the manuals, you will need to apply
air to both circuits, one is air supply and the other is control to the
relay valves. The brakes should be fail-safe, applied when there is no
If you're going to "pick it up" the brakes are irrelevant, and/or may
be applying insufficient pressure to stop the wheels from rolling.
You can probably "cage" the brakes sufficiently to allow it to roll,
but I'd try just backing off the slack adjusters first.
If you have a method to charge the system, that may be most expedient.
In any case, vigorous application of a LARGE hammer to the brake drums
may be necessary.
A search for "caging spring brakes" may offer additional information.
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