The brake pedal on my mule goes to the floor

When replacing brake hydraulics it is a good idea to take measures to prevent all the fluid draining from the master cylinder - a dry master cylinder can cause problems when it is ageing and moreso if the reservoir contains black sludge, a sure sign of contamination and failing seals.

I am wondering if the pedal really goes to the floor or just goes a long way down? With dual circuit brakes the pedal will only hit the floor if both circuits are affected.

Assuming the wheel brakes are in good condition and the brake pedal linkage and brake booster/master cylinder clearance are correctly adjusted and I was certain no load sensitive valve was inhibiting bleeding the rear brakes and I was as confident as you no air remained in the system, I would clamp all the flexible hoses. If that improved the pedal it would prove air remains trapped in the wheel brakes. If not I would suspect a faulty master cylinder.

The piston seals could be bad, and bleed the brakes to make sure.

when you say goes to floor is that quickly if so look for a puddle under car after pressing pedal down if not most times if the pedal goes down like sitting at light gradually going down is a sure sign of bad master cylinder

for the pedal to go to the floor there is still air in the brake system. Start again starting from the longest line bleeding each in turn to the shortest line . make sure you have adjusted up the rear brakes before bleeding as every time you press on the pedal the shoes expand right out and when you take your foot off the pedal the shoes go all the way back in. adjust them manually and do not rely on the self adjuster as it only adjusts on wheel movement

BOYEEEE! Your master cylinder is bypassing!!!
Get a rebuilt or new unit installed and you will have brakes,again.
Don't wait. Do it now.
Be sure the rear wheel cylinders are NOT leaking,first.
That will cause the master cylinder to fail.
Follow the instructions in the box.

You will be happy.
PS: Thank you for the symptoms.You are above the curve to describe the symptoms,here. MORE than 80 IQ.
Happy to help!
Dave.

if a master cylinder is bad and you are sure you have all the air out and no leaks.pedal will go to floor , running or not. if booster is bad it will cause a hard pedal. but if master cylinder is bad it will turn on a brake light on dash if it works. make sure the wheel cylinders are not leaking. I beleive that the master cylinder is bad, or you have a leak somewhere. If the master cylinder is functioning properly, the brake pedal will depress to a certain depth and no further.

check vacumn and\or connections to the vacumn boost cannister.

If the brake pedal goes to the floor with the car off, I would suspect air in the system or some other issue with the service brakes. If you feel and hear a growl in the pedal when it goes to the floor then your abs controller may be at fault. There are many possibilities. In either case if your pedal goes to the floor, then you are looking at a safety issue. Generally the service brake system (regular brake system) is the fault and not the abs. I have however seen a sticking dump valve or faulty wheel speed sensor cause an abs issue. Start with the basics first. Leaky wheel cylinders/ calipers, brake lines, or master cylinder. Verify the hydraulic integrity of the service brakes before tackling an abs issue.

make sure brake fluid is full. then pump brakes for one minuite check the fluid to see if it went down or stayed full. if it went down then check the system for a leak . if it stays full then you will need a new mastercylender . i dont think you have a vacum problem cause this causes a verry stiff brake pedal not one that goes to the floor

are your rear drums set up? why did you bleed the brakes. when only when you installed new pads?