Community Forums

williame · 10-27-2010, 09:30 PM

i have a brake light on in my 1983 chevrolet sportscoach, after a major search, i have found that the master cylinder i under the brake pedal, under the floor. does anyone know a trick to checking/filling , it because i cant figure it out. any help would very much be appreciated.

RVhauler · 10-27-2010, 10:04 PM

The brake lights are usually operated by a switch on the brake pedal. problem is usually s tho sometimes can be a shorted wire.ticking mirco switch. The fluid level sets a warning light when low but is not connected to the brake lights

williame · 10-27-2010, 10:26 PM

thanks for the response, but what i really need to know is, whats the trick to putting break fluid into the mastercylinder, its impossible to get to.

Wanabee FTer · 10-27-2010, 10:42 PM

Not sure about that model but seems like there would be a hatch in the floor board to access? Look around underneath, maybe a small panel or a large panel can be removed to access the master.
Also check the park brake switch, not sure on your model but some older coaches share the same dash brake warning light for a fault in the hydraulic system and park brake system.

williame · 10-27-2010, 10:54 PM

thank you , i will check for some kind of access panel, looked earlier, but maybe not in the right place, its a 1983 sportscoach with a 454. thanks again.

OldChief7155 · 10-28-2010, 05:24 AM

We used an eye dropper and inspection mirror to service some aircraft systems. It's obvious RV designers went to the same school as aeronautical engineers and NEVER bend a wrench themselves.

born2camp · 11-03-2010, 10:43 AM

On my 84 P30, it was not too bad with an extension funnel(long tube) with some 3/8 tubing heated up and stretched over end of funnel. It is VERY important to clean surrounding area of master cylinder. I used a soft vinyl bristly parts brush along with air pressure around the cap before unlatching the cap holddowns. I also taped a large plastic bag to bottom of floor board so I did not knock anything into MC while cover was off. I used a Turkey Baster to suck out the old brake fluid, filled with new and then bled all wheels, making sure to keep MC full while doing that. I did not have an access panel, just what is open with doghouse cover off.

williame · 11-12-2010, 09:39 PM

we found it by taking off the left front wheen, it was on the wall just on the other side of the wheel, was able to add fluid and take care of the problem. thank you all so much for the great advice.