Deuce and a half is another name for the M35, a series of cargo vehicles used by the U.S. military. Some of them have been decommissioned and are in private hands. If you own an M35, you can bleed the brakes yourself. Like most vehicles, the M35 uses a hydraulic brake system. Force is transferred from the brake pedal, through the master cylinder, and to the brake calipers by using hydraulic fluid. If air gets into the system, it can cause the brakes to fail. When working on the brakes, it's important to bleed the air out afterward.
Locate the master cylinder access hatch. It is inside the cab on the floor of the driver's side seat.
Open the access hatch door. Use a clean cloth to wipe the area around the master cylinder cap so debris doesn't fall inside.
Unscrew the tube nut using your 3/8-inch open end wrench. Set the nut aside and remove the hydraulic tube.
Unscrew the master cylinder cap using the 3/4-inch wrench. Set the cap aside.
Insert the end of the flexible neck funnel into the top of the master cylinder. Fill the master cylinder compartment to within 1/2-inch of the top with hydraulic brake fluid.
Remove the flexible neck funnel from the master cylinder, and screw the master cylinder adapter to the top of the master cylinder reservoir. Attach the quick disconnect to the adapter.
Pressurize your bleeder tank to 20 to 30 psi. Open the valve on the bleeder tank hose, and attach the female connection on the bleeder tank hose to the male quick disconnect.
Locate the bleeder screw on the air hydraulic cylinder. The cylinder is on the underside of the vehicle, between the point where the dump bed attaches to the cab.
Clean the bleeder screw with your cloth, then attach the bleeder hose to the screw. Insert the other end of the hose into the transparent container, and pour hydraulic fluid into the container until it is half full. Make sure the level of the fluid covers the end of the hose.
Loosen the bleeder screw with your 7/16-inch box wrench. Rotate the screw a 3/4 turn. Watch for air bubbles coming out of the end of the bleeder hose. After there have been no bubbles for five seconds, close the bleeder screw tightly and disconnect the bleeder hose.
Connect the free end of the bleeder hose to the bleeder screw on the brake farthest away from the master cylinder. Use the 7/16-inch box wrench to loosen the bleeder screw 3/4 turns. Watch for air bubbles to come out. When no more air bubbles emerge after 5 seconds, tighten the screw. Repeat this process for the other three wheels.
Remove the female quick disconnect hose from the male adapter. Unscrew the male adapter from the top of the master cylinder reservoir.
Replace the master cylinder cap, and attach the hydraulic tube to the top of the cap. Screw in the tube nut using the 3/8-inch wrench. Close the master cylinder access door.
