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Technical Support / Re: C9 400 HP Excess oil from breather tube
« Last post by Eric Maclean on Today at 02:06:27 PM »
Here is an earlier thread/ post on the issue that may be of more help

Hope this helps
Technical Support / Re: C9 400 HP Excess oil from breather tube
« Last post by Eric Maclean on Today at 01:57:45 PM »
Excessive oil from the breather or draft tube is indicative of excessive blow by caused by bad piston rings ( worn out or stuck )
An engine that has seen too much dust or dirt will exhibit excessive blow by this condition is usually caused by an air filter system that allows dirt and dust to pass into the engine ( commonly referred to as dusting an engine ) .check for bad or incorrect or air filter or hole in the air filter hoses leading to the engine intake.

But before getting too carried away the first thing to do is as was stated earlier check your oil level as too much oil can also be the cause of oil dumping at the breather tube. From the little resource I've done it appears the C9. Has an oil capacity of 31.7 quarts not 34 if the engine is over filled the excess oil with be picked up by the crank shaft and flong up into the engine ( a phenomenon known as windage ) this causes oil to atomize and carried to the crankcase breather which is overwhelmed by the amount of extra oil and ends up passing it through the breather instead of scavenging it.

You need to make sure you are running the proper amount of oil.

The other thing you might want to do is service or replace  the crankcase breather assembly as it's job is to allow excess crankcase pressure to vent while at the same time it is scavenging oil from that air it is letting escape if the breather is very dirty its ability to scavenge the transient oil is diminished and oil will pass through it and out the draft tube.

Here is a video of the replacement

Hope this helps
Technical Support / Re: Air Solenoid and Fuel Line Replacement
« Last post by Scott Shearer on Today at 04:51:18 AM »
Good choice.

Kaiser is a second or third generation operation. They can do repairs that a lot of other shops can't or won't. You'll pay a little more but you'll be in good hands.

And they are honest.

Technical Support / Re: C9 400 HP Excess oil from breather tube
« Last post by Bryan Beamon on Today at 04:26:45 AM »
Frank, appreciate the response but this amount of oil is very unusual as I have recalibrate our dip stick 17 years ago and have always added 34 quarts of oil at all oil changes. Also we have driven 1000 miles on the last oil change with no oil coming from the breather tube.Is there any other circumstances that could cause this condition?
Technical Support / Re: C9 400 HP Excess oil from breather tube
« Last post by Frank Bergamo on Today at 03:36:14 AM »
Overfilled crankcase will push excess out breather tube. Next oil change, put the exact amount of oil that the spec calls for, then check dip stick and mark the level with a file to calibrate dip stick. It is common for the dipstick to not be accurate, as the dipstick is installed by the coach manufacturer, not the engine manufacturer. Hope this helps.
Kaiser Brake and Alignment   
Shop that knows the system, most of the buses of this era were built in Eugene / Coburg. Can’t find any shop in the area I’m comfortable with.
Technical Support / C9 400 HP Excess oil from breather tube
« Last post by Bryan Beamon on Today at 01:03:23 AM »
After a 160 mile drive today found oil on ground from the breather tube and minor amount on the tow shield. Checked oil level and it was 1/4 inch over filled but had been that  level since last oil change at 1000 miles ago. Coolant level was full and hydrolic  fluid level full. Any ideas as why the oil leak from the breather tube was excessive?
Technical Support / Re: Fresh Water System
« Last post by Scott Shearer on Today at 12:29:29 AM »

Assuming that your coach is equipped with a power water hose reel you won’t have a standard city water connection with a built-in check valve. Open the access door inside the wet bay, look to the right of the hose reel and you should see the freshwater check valve. I’ve attached an image showing the location on our PT.

Another thing to consider, if your coach has the full version Aladdin (shows the status of the freshwater tank) the autofill function uses the tank fill level to know when to shut off. Are your tank level readings accurate? If not, you will need to recalibrate your tank levels. When using the autofill, you should see an ‘AF’ indicator on the freshwater status line, does the freshwater tank continue to fill after the ‘AF’ indicator turns off? If so, then your problem is likely as Eric explained.

Technical Support / Re: Fresh Water System
« Last post by Eric Maclean on June 18, 2024, 09:19:41 PM »
Sounds like two separate issues
1) there is a check valve and pressure regulator built into  the city water connection it sounds like the check valve is failing to prevent back flow.

2) the red hat valve is responsible for filling the fresh water tank if it doesn't close the tank will over fill and water will run out the overflow/vent

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