Oil Leak

Topic: Oil Leak (Read 683 times) previous topic - next topic

Oil Leak

September 08, 2019, 05:59:12 pm

While trying to figure out and get my battery systems working. i looked across to see oil dripping on the sidewall of the driver side (U270). Currently I can not start Rv. its sitting on rear tires. Not thin enough to slide under. Can see where leak is coming from. Any ideas so I can start learning about what system is envolved. Mark

Re: Oil Leak

Reply #1 – September 08, 2019, 06:16:16 pm

Sidewall of the engine compartment or the coach skin?

Re: Oil Leak

Reply #2 – September 08, 2019, 06:17:46 pm

How about posting a photo?

Pierce

Re: Oil Leak

Reply #3 – September 08, 2019, 06:26:42 pm

Mark,

We are going to need more information.

Please be more specific about where you see the leak or post a picture.

Choices include engine oil, transmission oil, hydraulic oil, and, gear oil. Too many "oil sources" for us to speculate.

Re: Oil Leak

Reply #4 – September 08, 2019, 07:37:31 pm

I will send my arm under with phone. Maybe I can get a good pic. Hold on. Tks

Re: Oil Leak

Reply #5 – September 08, 2019, 08:07:35 pm

Shared album - mark hubbard - Google Photos

Beginning pictures are from drivers rear shooting blind up, forward, inner tire shoulder showing fluid. Then picture of new trans, differential and upward. Then from front of drivers rear again in blind shooting upward, tire. Note: fingernails will not take pictures. Hopefully these can help identify something. Very little clearance on ground.

Re: Oil Leak

Reply #6 – September 08, 2019, 08:33:19 pm

Good photos from below - have you opened the engine bay door to look from the topside?

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Reply #7 – September 08, 2019, 08:55:01 pm

It looks like to only fresh oil is likely from a failed axle seal.

Re: Oil Leak

Reply #8 – September 08, 2019, 09:01:49 pm

Now we are are starting to get a handle on the problem. It looks to me to be rear axle lubricant from a seal. Did the shop remove the rear wheels when they did the transmission? Axles? Any oil visible on the wheel on the outside? How about with a flashlight looking through an opening from the outside dual to the inside?

Pierce

Re: Oil Leak

Reply #9 – September 08, 2019, 09:07:06 pm

Anytime a problem occurs on any vehicle after a shop has done work, the first thing I like to do is determine if the problem is in any possible way related to the work that was done. In your case, it looks like an easy fix but that's only from view your photos on a laptop right now.

Why can't you start your coach?

Pierce

Re: Oil Leak

Reply #10 – September 08, 2019, 09:12:34 pm

Looks like an axle seal to me.

Re: Oil Leak

Reply #11 – September 08, 2019, 09:28:08 pm

Yup, rear axle seal needs replacement.

Likely need to replace the brake pads (both sides for equal braking) as well if they are oil-soaked.

Be sure to check the rear axle breather/vent for mud dubbers next-- a clogged vent WILL blow even good seals.

Re: Oil Leak

Reply #12 – September 08, 2019, 09:44:52 pm

I figure best to do both sides seals and brakes. locally there is only shade tree semi shops. what are the parts access issues for these services. i most likely will have to source everything. we do, have Napa and other auto shops. San Antonio is the big city.

Re: Oil Leak

Reply #13 – September 08, 2019, 09:59:00 pm

To R&R a seal seems really easy but perhaps Roland Begin is the best to tell the tale of what can possibly go wrong when it does go wrong. Read his old posts and give him a jingle. Think his problem was on the back but could have been front.

Pierce

Re: Oil Leak

Reply #14 – September 08, 2019, 10:03:11 pm

Quote from: Texhub – September 08, 2019, 09:44:52 pm

I figure best to do both sides seals and brakes. locally there is only shade tree semi shops. what are the parts access issues for these services. i most likely will have to source everything. we do, have Napa and other auto shops. San Antonio is the big city.

The big rigs use the same set-up, and the truck repair shops usually will do the kind of repair on a coach. If you have the tools it is not a very hard job to do.

Re: Oil Leak

Reply #15 – September 08, 2019, 10:18:14 pm

Quote from: wolfe10 – September 08, 2019, 09:28:08 pm

Be sure to check the rear axle breather/vent for mud dubbers next-- a clogged vent WILL blow even good seals.

So, where would I look to check my breather/vent? I suspect they have not been checked in 20 years.

Re: Oil Leak

Reply #16 – September 08, 2019, 10:22:37 pm

Physical limitations. Have tools. But body will not allow removal of tires. Too much damage from military years.

Re: Oil Leak

Reply #17 – September 09, 2019, 01:22:25 am

Check the truck parts store,they make a portable dolly contraption,can easily move the tire,and get one of the heavey duty 18 volt
or higher impacts,celabrate the Navy's birthdate with new tools.

Re: Oil Leak

Reply #18 – September 09, 2019, 09:05:46 am

Personally I would take the coach to my tire store that also does minor repair and service on big trucks. They usually do brake jobs on semis and are qualified and equipped to do a seal replacement.

Re: Oil Leak

Reply #19 – September 09, 2019, 01:54:20 pm

Richard, the breather vent will be on top of the axle housing and near, one side or other of the rear end gear housing.. Just tap on the top a bit and twist it back and forth a few times should free up any obstruction should there be any.

Re: Oil Leak

Reply #20 – September 09, 2019, 02:13:09 pm

Unable to get any better pictures today. Will try when I get rv started and air up.

Re: Oil Leak

Reply #21 – September 09, 2019, 03:04:54 pm

If you have access to an air compressor and a home made male-male quick connect adapter, you can air up your system and raise the coach without starting it. Connect the air compressor to your coach auxiliary air port and it will fill your tanks.

Re: Oil Leak

Reply #22 – September 09, 2019, 03:16:16 pm

You have pictures enough to show there is a hub seal bad.

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