Re: Hello and trying to fix wipers.

Posted by Redhexagon On 2022/8/22 12:18:52

Thanks for answering.

1. The wiper motor is rebuilt, clean, and greased. It moves very easily and holds vacuum internally. The only slight leak is on the switching valve, which is nylon and seals against aluminum without a gasket. There will always be some leakage on it. I could send it to Ficken, but I doubt he could improve this motor any.

2. The balancing valve is not in use since the internal engine vacuum pump is not in use. I am using a double-acting fuel pump/vacuum pump instead with it's own plumbing and internal check valve.

3. All hoses and connections are new, tight, and sealing, including those under the dash for the variable wiper arc control.

4. The wiper arms move easily by hand and the cable pulleys all turn, but I will try oiling them anyway.

Mostly I'm asking about what is normal for vacuum wipers on a double-acting fuel pump/vacuum pump at this kind of altitude. I know vacuum-operated equipment works less effectively up here, so I wonder if I'm just chasing my tail trying go fix something that cannot be fixed because there just isn't enough air pressure up here to make them work.