| Author |
Message |
jj-mc9, aka ogite old guy in the Eagle
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 12:30 am: | |
Recently, I picked up a nicely done Eagle conversion in CA. It has an 8V71, Stone Bennet shifter and air throttle. It was running fine until I would come to a grade. Even with downshifting and running the mister on the radiator, the engine would just quit and I would coast to a stop on the shoulder.
After about 20 minutes, the bus could be restarted and head down the road. There was no problem on level roads...just on grades. The fuel filters were changed out and the radiator power washed several times. The latter seemed to solve the problem until I headed up an 8900' grade west of Cheyenne, WY, where the bus stopped again. This stalling probably happened 10 times during my 1500 mile trip home. The seller thought it might be "water contamination" in the fuel.
Any thoughts/help would be appreciated as it's not ready to tackle more grades as it is now.
Thanks for the help. |
paranoidoftheoceanguy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 5:26 am: | |
Trash in fuel tank |
Jack Conrad (Jackconrad)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 7:25 am: | |
You mentioned using the radiator mister. What was the engine temperature gauge showing? If the engine was running warmer than normal, might be the hot engine shutdown, check the alarmstat senders in each thermostat housing |
trucker
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 9:14 am: | |
for those who might thing otherwise trash in the fuel tank can mess you up. Just a plastic bag or cigarette wrapper can be a nightmare. Another thing is that fuel line begin to seperate and can cause a flapper in the line. Just a little increase in fuel temp can cause a piece of the lining to bend in an cause an obstruction that will usually clear itself by a lower temp causing the lining to become more rigid and going back into place or just the pressure being relieved. Fuel line is cheap as the first replacement item. |
Brian (Bigbusguy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 11:17 am: | |
Trans over temp?
My 4 speed is tied in to the engine protection and will also shut down if there is low trans PSI.
But I will get lights and bells before that happens.
You should have got some type of alarm if it was any of the engine prection shut down.
Check that all of the lights work no bad bulbs and all the buzzers are working so it can tell your why its shuting down.
Brian 4905 At the bus rally Rickreall Oregon on July 7, 8, 9, |
jj-mc9, OGITE, or Old Guy In The Eagle
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 10:20 pm: | |
Thanks for the info, guys. Will have it in the shop in a few days for a mechanical checkup. But then I won't have money left for fuel... |
gusc
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 03, 2005 - 10:29 pm: | |
"After about 20 minutes, the bus could be restarted and head down the road."
This shows that you have a fuel delivery restriction of some sort. Climbing hills obviously takes a lot more fuel.
There was a problem much like that in fire trucks using 3208 Cat engines. It was finally found to be a 90 degree elbow just before the fuel filter that had gotten a thin coating of fuel or fuel contaminants over years of use. It was thick enough to cause a problem when the fuel/engine was cold but after they warmed up the problem disappeared.
The solution was to clean out the elbow or replace the 90 degree elbow with two 45 degree elbows. The sharp 90 degree angle was a trap. |
robert loomas
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 04, 2005 - 1:46 pm: | |
If it were me I would change out the fuel filters
befor starting on the rest of the good advice. |
paranoidoftheoceanguy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 04, 2005 - 2:03 pm: | |
robert...re-read the question |
don (Bottomacher)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 04, 2005 - 4:14 pm: | |
If it happens only uphill and not downhill, or vice-versa, I expect you have trash in the tank that is blocking the pickup tube.
FWIW |
Brian (Bigbusguy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 05, 2005 - 7:37 am: | |
A blocked fuel line or filters buses dont just restart right up and then you drive away like nothing happened. I would think you would lose prime and restarting would be hard and should be easy to tell.
A engine shutdown from a motor protection system will stop your motor but after bells and lights but if the lights are not working you will have idea why you just coast to a stop until it times out and you can restart it. On my 4905 its about a 3 to 4 min wait for the factory system to reset.
Brian 4905 Will be at Bus rally at Polk County Fairgrounds, Rickreall Oregon On July 7, 8, 9 |
Rich International Bus & Parts
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 05, 2005 - 9:25 am: | |
Sounds like your Alarmstat. Around $25 on an Eagle. It will shut your engine down at a water temp of 210 degrees. Typical when pulling heavy grades. Not as common on the Eagles as compared to M-8 & 9. But when coaches get a little older & the radiators aren't cooling like they used to......
Rich
800-468-5287 |
Buswarrior (Buswarrior)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 05, 2005 - 10:27 am: | |
Hello JJ MC9.
For my money, the overtemp shut down is causing your roll to a stop problem.
Temps increase when hill climbing, due to the greater amount of work being done and if the cooling system can't deal with it , for whatever reason, a shut down is triggered to protect the engine.
Your questions need to be:
1) Is my engine overheating? In which case, the shut down is working properly, and move on to cooling system research!
2) How do I "know" the temperature of the engine?
Using an infra red heat gun, or other method, have you checked to be sure your various gauges are accurately portraying the engine temperature? Do not trust the dash gauge.
Both of these require no invasive surgery, and you really should have one of those infra red heat guns(search the archives for testimonials).
Only after you have identified that the engine is not overheating, proceed with:
3) Are my alarmstats triggering at the correct temperature? Both banks? Wiring good? Good preventive maintenance principles would justify replacing them.
As long as your overtemp lights on the dashboard are working properly, you might consider removing the auto shut down feature, so you can decide where the bus is going to stop, instead of it making the decision for you.
Auto shut down was there to protect the bus from employee drivers with no regard for the expence of the engine, who would keep on driving until it seized. No kidding
Not many busnuts I know with that disregard for capital outlay...
happy coaching!
buswarrior |
Henry R. Bergman, Jr. (Henryofcj)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 05, 2005 - 7:31 pm: | |
Yeah...PROBABLY dirt in the works...or in this case, in the bottom of your fuel tank. Drain some out and take a lookie.
RX.....drain and flush your tank. Also POSSIBLE but unlikely your have dirt in the fuel lines, either pressure or return.
RX...the same. Flush and clean your fuel lines and check any aux. fuel pump for clogged works also.
OR....your fuel lines are clogged up on the insides like heart arteries due to old age. Rubber swells when hot...reducing flow.
RX...same as above. Try changing out ALL your rubber fuel lines (if any) for new. This may solve your flow problems up hill when hot. |