I found that the surge brake actuator on my MagicTilt trailer was not working. The mechanism is all rusted up.
I got new one (UFP-75a with backup solenoid). I installed it and bled the master cylinder according to the instructions (move the actuator rod with a screw driver until no more bubbles in the reservoir). Then I tried bleeding the brakes.
I opened the bleed valve on the caliper (self bleeders) and moved the actuator rod with the screwdriver. I noticed that the reservoir did not deplete much at all. I opened the bleeder more, and still no fluid went out of the reservoir. I opened the brake line at the first tee and tried again (to see if the line was blocked). Same thing, no depletion from the reservoir and no fluid out the line.
I removed the actuator, disconnected the outlet line, and moved the rod again. A little fluid comes out every once in a while when the rod is moved, but most strokes result in nothing happening. Sometimes I can hear a sucking noise when the rod is moved coming from the outlet. I can see the rod moving in the port at the bottom of the reservoir.
I expect that there should be a decent squirt of fluid whenever I move the rod, but this is not happening.
Is there some thing I overlooked or some trick to getting the actuator to work so I can bleed the system? Perhaps I have a defective actuator?
I got new one (UFP-75a with backup solenoid). I installed it and bled the master cylinder according to the instructions (move the actuator rod with a screw driver until no more bubbles in the reservoir). Then I tried bleeding the brakes.
I opened the bleed valve on the caliper (self bleeders) and moved the actuator rod with the screwdriver. I noticed that the reservoir did not deplete much at all. I opened the bleeder more, and still no fluid went out of the reservoir. I opened the brake line at the first tee and tried again (to see if the line was blocked). Same thing, no depletion from the reservoir and no fluid out the line.
I removed the actuator, disconnected the outlet line, and moved the rod again. A little fluid comes out every once in a while when the rod is moved, but most strokes result in nothing happening. Sometimes I can hear a sucking noise when the rod is moved coming from the outlet. I can see the rod moving in the port at the bottom of the reservoir.
I expect that there should be a decent squirt of fluid whenever I move the rod, but this is not happening.
Is there some thing I overlooked or some trick to getting the actuator to work so I can bleed the system? Perhaps I have a defective actuator?