What does this yellow faded engine bottle do?

Scubawise · 04-24-2021, 08:48 PM

Hi looks empty and hard to reach?

Baldy · 04-24-2021, 09:09 PM

Looks like the master cylinder for your brakes.

Scubawise · 04-24-2021, 09:12 PM

I can't see any fluid in it?

**EA37TS** · 04-24-2021, 09:13 PM

I'll bet the owner's manual shows that bottle under the section on checking brake fluid. You might want to review that section because it could save your life sometime.

Scubawise · 04-24-2021, 09:15 PM

Thanks

MJC62 · 04-24-2021, 09:31 PM

Master cylinder. Take the cap off and stick your finger in there to verify it has fluid. Brake fluid is clear when it is new. Old rule of thumb you should have fluid up to the first joint on your finger when checking.

Down South · 04-24-2021, 09:53 PM

Brake fluid reservoir. It looks empty. Have you noticed any fluid on the ground around the wheels?
If it is truly empty which it shouldn't be. You could be losing brake fluid somewhere.
Maybe it was always low, I doubt it. But a lot of wear on disk brake pads will cause the level in the reservoir to be lower.

If the level in the reservoir gets down to the master cylinder, You will be bleeding air out of the brake lines.

Look at your owners manual to see which brake fluid it takes. The brake fluid type might be stamped on the lid of the reservoir too. It will most likely be DOT 3 or DOT 4.

standerson · 04-24-2021, 10:16 PM

Might want to get that checked. You might end up "Flintstoning" your RV to get it to stop.

Scubawise · 04-25-2021, 12:56 AM

Sorry is master cylinder and brake fluid the same? I see another brown colored jug looks like brake fluid .here is the book page of fluids

Scubawise · 04-25-2021, 12:57 AM

Brake fluid

Down South · 04-25-2021, 01:23 AM

The brake fluid is what the master cylinder uses for hydraulic pressure to activate your brakes.
The yellow tank you questioned about is sitting on top of the master cylinder. Check the level in that yellow tank. The cap probably will have writing on it that says something like "Use DOT 4 fluid only".
Your manual, the pic in your last post verifies DOT 4.

I have no idea yet what the third tank is. What is written on the cap?
Maybe power steering fluid?

Scubawise · 04-25-2021, 03:12 AM

Will look again

Travelin' Texans · 04-25-2021, 03:33 AM

Quote:

Originally Posted by Scubawise

Sorry is master cylinder and brake fluid the same? I see another brown colored jug looks like brake fluid .here is the book page of fluids

Im not trying to be rude or insensitive, but apparently you know absolutely nothing about servicing a vehicle judging from the several posts you currently have posted! I applaud you for giving it a try, but I'd find someone that knows what's what under your hood to help you out a couple times before you accidentally make a costly mistake.

standerson · 04-25-2021, 03:47 AM

Have you noticed any leaks (oil) on your driveway or where you park your RV? Noticed your brake pedal getting spongy or going all the way to the floor when you stop? Please, get it checked.

**EA37TS** · 04-25-2021, 11:47 AM

The way I understand it the coach is new. As someone mentioned brake fluid when new Is relatively clear in color and hard to make out in a reservoir when viewed from a distance. If someone was to enlarge the picture you can see a faint line about mid-way up the reservoir which could indicate the fluid level.

Without further evidence or better pictures I'm not sure why folks are locking onto there may be leaks.

Since the OP is the only one there they have to do their own maintenance checks per the manual and determine if the fluid level is correct.

I have noticed however, that the OP has not returned with further info after all the posts and comments regarding what the master cylinder does and what that reservoir is for.

Scubawise · 04-25-2021, 02:08 PM

Appreciate all as someone said per manual trying to check fluid levels..will stick a gloved finger in pic cap and let you all know

Again appreciated all it is the weekend 30 year senior engineer and sales manager thx

Scubawise · 04-25-2021, 04:01 PM

I found this does not match 100% but will use and update later

Scubawise · 04-25-2021, 04:54 PM

Ok removed cap shows dot 3 brake stuck finger in and JUST BELOW THE MOUTH OF THE CAP opening my finger is wet..interesting I pushed a little and there is a solid feel to the fluid. ? Maybe cold

abjbrtd · 04-25-2021, 05:06 PM

Warning
Brake fluid is an excellent paint remover

also hard on fingers

**16ACE27** · 04-25-2021, 05:59 PM

Quote:

Originally Posted by Scubawise

Ok removed cap shows dot 3 brake stuck finger in and JUST BELOW THE MOUTH OF THE CAP opening my finger is wet..interesting I pushed a little and there is a solid feel to the fluid. ? Maybe cold

You sure that isn't a screen you pushed against?. Maybe use a handheld mirror to look down into the opening?

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