Thanks for the help. It appears to be one of the hoses going up to the brake booster. Also not sure if it's related, but the front brake fluid reservoir is empty. I'm hoping I can just fill the reservoir, and replace the hose so I can finally finish plowing. I've owned this thing for a month now and every time I take it out something new breaks. I'm a novice when it come to mechanical, but becoming skilled quickly. lol
The hydraulic systems for the actual brake circuits and the hydroboost assist are completely segregated. A leak - in either system - will not cause a loss of fluid in the other.
If you lost all the fluid in the front reservoir of the M/C, there is a leak in the plumbing for that brake circuit - and that should be located and repaired first. After the leak has been located and repaired, bleed the brakes - as you would with any standard braking system. Only when you can develop normal pedal pressure and brake function, is it time to move on to the hydroboost issue. You could temporarily drive the truck with the broken line in the hydroboost system. But be advised; in that condition you will have no power assist for the brakes - but maybe more important when plowing - you will also have no power steering.
After repairing the broken line in the hydroboost system, it will need to be bled. Procedure:
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The remote start switch isn't necessary, just disable the the ignition system and crank with the key as normal.
Also, note the step where it directs you to rotate the steering wheel from stop to stop (while stroking the brakes) -
do this slowly and do it a lot of times.