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Old 09-29-2021, 11:22 AM   #1
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Is this my brake fluid reservoir?

1980 Winnebago brave 23'

I can't identify this black cylinder permanently welded onto the frame in front of the radiator, but it's time to add fluid. No product numbers or brand names that I can see on the cylinder, cap or hose, I've attached pictures of the whole engine access area, the black cylinder that im trying to identify, its cap/dipstick and fluid color, and its cap instructions.

Thanks for any help
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Old 09-29-2021, 11:26 AM   #2
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power steering fluid res.
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Old 09-29-2021, 11:33 AM   #3
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Quote:
Originally Posted by R.Wold View Post
power steering fluid res.
^^^ This
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Old 09-29-2021, 11:39 AM   #4
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power steering fluid res.
X2 In that era it would take Dexron automatic transmission fluid for refill.
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Old 09-29-2021, 11:40 AM   #5
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The "Hot" full line gives it away. Power steering fluid expands when hot while brake fluid does not. Plus a brake fluid cap will indicate the fluid type needed as mixing types will be a problem.
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Old 09-29-2021, 11:42 AM   #6
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Also you might consider emptying it with a hand pump, turkey baster, etc, filling with new fluid, then cycling it and doing it again a couple times. That fluid is probably old. Just make sure you identify the correct fluid to add. Dextron II is a good bet.
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Old 09-29-2021, 11:48 AM   #7
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Thank you everyone, I'll be refilling what is definitely my PS reservoir, haha. I'll be looking for the brake reservoir later.
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Old 09-29-2021, 11:34 PM   #8
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Your brake fluid reservoir should be either attached to the actual master cylinder which, should be directly in front of the brake pedal, or very, very close to it. It's really rare that a brake fluid reservoir is remote from the actual master cylinder. So, that's where I'd look for it, directly in line with your brake pedal, only on the other side of the fire wall.
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Old 09-30-2021, 04:26 AM   #9
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Have someone sit in the driver's seat and push and release the brake pedal while you look under the RV and watch for linkage moving. If you follow the linkage it will take you to the brake master cylinder with a cap on top of it.
You'd at the least want to know the reservoir is full before driving anywhere. Also put on your maintenance schedule a complete flushing of the braking system and replacing all the old fluid.
The previous suggestion to remove the old fluid from the power steering reservoir is an excellent suggestion. I would do it two or three times or until the fluid in the reservoir looks like new after running the engine and turning the steering wheel back and forth a few times between fluid checks.
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Old 10-06-2021, 10:30 PM   #10
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What chassis is your Brave built on? In 1980 they could have been on a left over Dodge chassis with the 440 V8 engine or the newer Chevy chassis with the 350.

On the Chevy if it has the button activated parking brake there can be 2 master cylinders, one for the service brakes and another for the AutoPark system that operates the parking brake. Not too sure about the Dodge.

The brake systems should be drained of all fluid, flushed and then refilled with new fluid every 2 years regardless of miles driven. The power steering system on a unit that old should have the return line and pressure line replaced and a filter installed in the return line and of course be refilled with fresh clean power steering fluid so the filter screen inside the pump does not get clogged up with bits of rubber from the old hoses. Note that on a motor home chassis often the power steering pump is also what provides the brake assist for the power brakes which makes servicing the power steering pump even more important since when it fails it can impact both steering and braking.

Likewise the cooling systems are considered under severe service in a motor home and should be flushed and refilled with fresh coolant every 2 years also.


Of course you want to go through the fuel system too and verify all the fuel lines are in tip-top shape. Pay especially good attention to the mechanical fuel pump that were bolted to the engine as those had a rubber diaphragm that would crack over time when exposed to ethanol and allow gasoline to drip into the crankcase diluting the oil since they were powered by a lever running off a cam inside the engine block.

You really want to zero set all maintenance to ensure its all current and up to date.
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