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Hydraulic wipers [message #336563] Fri, 31 August 2018 14:16 Go to previous message
FastEddie313 is currently offline  FastEddie313   United States
Messages: 2
Registered: August 2018
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Junior Member
Hi!
I have been having a bit of trouble finding any information on my hydraulic wiper system. I have a 1981 Holiday Rambler Imperial 33 and I think it has the same or similar hydraulic wiper motor setup as your GMC motorhomes..

It has a slide switch on the dash that works a cable that goes to the wiper motor. I unfroze the cable and linkage and got it moving..
The thing is that the motor just doesn't seem to put out near enough power/torque..

If I take the wiper levers off the motor the motor turns and stuff but it doesn't put out enough power to run the wipers.. Or if I give the wipers a bit of help manually they will go a bit but don't have enough power on their own..

I think I read something about an inline filter?

The power steering pump also runs the power steering and power breaks, hydraulic boost breaks.
Both the power steering and breaks put out good power, to the point to where they will make the power steering belt slip if you really step on the break or try to turn the front wheels sitting still..

Yeah I know I need to tighten the belt. I haven't gotten around to that yet, but the wipers don't make the belt slip or seem to draw much power from the pump at all..

Any help diagnosing this would be excellent..
If this machine is to ever tour again it is going to need functioning wipers..

I'm not looking to convert to electric yet, I would rather figure out the hydraulic system and see if I can make it work first..

Thanks guys!

[Updated on: Fri, 31 August 2018 14:17]

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