Cleaning up a Proportional Valve
Clean everything to spotless, including the inside of the valve body itself. I replace the o-rings on the bottom nut, the switch and the upper plunger. I use Buna-N rings. Make sure you use something other than plain old rubber rings. You want them to hold up in brake fluid. The bottom nut uses a 014 ring. The switch and upper plunger use an 011 ring.
Here are all the parts cleaned, new o-rings and ready for re-assembly:
Re-assembly is the reverse of the above: upper plunger, switch and lower plunger, spring and nut (don't forget the washer). You should be able to push the upper plunger and it should spring back. You can also check continuity of the switch with a meter.
I dunno if this will help anyone but I didn't see anything posted like it anywhere. These are actually not that hard to do. I just wish we had a source for the bottom grommets and the brass seal ring. If anyone has a source for those parts, please let me know. Thanks.
Clean everything to spotless, including the inside of the valve body itself. I replace the o-rings on the bottom nut, the switch and the upper plunger. I use Buna-N rings. Make sure you use something other than plain old rubber rings. You want them to hold up in brake fluid. The bottom nut uses a 014 ring. The switch and upper plunger use an 011 ring.
Here are all the parts cleaned, new o-rings and ready for re-assembly:
Re-assembly is the reverse of the above: upper plunger, switch and lower plunger, spring and nut (don't forget the washer). You should be able to push the upper plunger and it should spring back. You can also check continuity of the switch with a meter.
I dunno if this will help anyone but I didn't see anything posted like it anywhere. These are actually not that hard to do. I just wish we had a source for the bottom grommets and the brass seal ring. If anyone has a source for those parts, please let me know. Thanks.
