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RBrian
Senior Member

United States
71 Posts

Posted - 03/23/2018 :  03:23:55 AM  Show Profile  Visit RBrian's Homepage  Reply with Quote
I'm wondering how many C2's have had engine failure due to the seal at the bottom of the air filter? Had one get dusted and Cummins denied the claim. They said it was due to lack of proper maintenance. They claim that if we were checking intake hose clamps as stated in the maintenance schedule it would not have happened. Who does that? Shortly thereafter Freightliner came out with the rubber band seal. And they covered the cost of the inframe rebuild.

http://www.schoolbusfleet.com/forum/topic.asp?TOPIC_ID=40263

Possibly what happened with this one:
http://www.schoolbusfleet.com/forum/topic.asp?TOPIC_ID=40276

bwest
Administrator

United States
3820 Posts

Posted - 03/23/2018 :  07:22:54 AM  Show Profile  Reply with Quote
I can believe that Cummins wouldn't cover. I'm glad Freightliner stepped up and did it. It's ridiculous to think that a clamp like that would be a maintenance item. With that thought process, you could say almost any failure should have been caught if you were inspecting well enough. I used to be a service manager at a Ford dealer. The "seal at the bottom of the air filter" is what is called the "causal part". Put part number of the seal in the proper box on warranty paperwork and away we go.

Bryan
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exmod110
Senior Member

141 Posts

Posted - 03/23/2018 :  08:37:07 AM  Show Profile  Visit exmod110's Homepage  Reply with Quote
either way, the clamp was not tight enough or it was over tightened, they will find some way skirt the issue and not pay warranty.
We have done one engine here, our dime because no one would admit there was a design problem with the intake system.
Cummins does not supply the intake system, Why would they warranty a dusted engine?
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RBrian
Senior Member

United States
71 Posts

Posted - 03/23/2018 :  08:58:06 AM  Show Profile  Visit RBrian's Homepage  Reply with Quote
Freightliner designs the intake system that is why Cummins wouldn't warranty the engine. Freightliner didn't want to acknowledge their design flaw. They told my dealer we should have been checking the clamps. Normally during PM we give visual checks on stuff like that. Unless you put a tool on them you wouldn't know they were not sealing.
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wrenchsnapper
Active Member

25 Posts

Posted - 03/23/2018 :  3:28:31 PM  Show Profile  Visit wrenchsnapper's Homepage  Reply with Quote
We had 3 low mile ring jobs done because of this issue. The dealer warrantied it. The clamps were tight but since the filter is a cup facing upward sand and dirt just sit in there and vibrate into the plastic seal area eventually loosening the clamps and getting through. The clamps on the turbos themselves come loose regularly and they are very hard to notice. Ive had a bunch of the air piping clamps corrode and break off on the road blowing the hoses off. Maybe some sheilding or covers for the air intake system protecting from road splash might be worth looking into eh freightliner?
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bluebirdvision
Top Member

USA
1077 Posts

Posted - 03/23/2018 :  7:02:16 PM  Show Profile  Reply with Quote
Freightliner must be in talks with the head warranty guy over at General Motors/Dodge/Ford. Splitting hairs is their specialty. LOL

Facebook Page: Blue Bird Corporation Fans
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Fastback
Top Member

1500 Posts

Posted - 03/26/2018 :  08:15:41 AM  Show Profile  Reply with Quote
After reading this thread this morning I was checking under hood on one of our propane C2s and found the air intake elbow had slipped out of hose between air cleaner and engine...... better check em all

Why yes, the ORIGinal CHARGER is a Fastback
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bwest
Administrator

United States
3820 Posts

Posted - 03/26/2018 :  10:57:34 AM  Show Profile  Reply with Quote
quote:
Originally posted by Fastback

After reading this thread this morning I was checking under hood on one of our propane C2s and found the air intake elbow had slipped out of hose between air cleaner and engine...... better check em all



If someone gets agitated because you look at this forum, all you have to do is show them this thread and what you found. Worth the price of admission right there!!

Bryan
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busmaster54
Active Member

United States
18 Posts

Posted - 10/19/2021 :  09:58:40 AM  Show Profile  Visit busmaster54's Homepage  Reply with Quote
We had C2 with 6.7 that had that problem with the seal leak and dusted the engine. They tried to blame us for lack of maintenance that we proved wrong, they said we bought a inferior filter, but we bought it from them (the dealer. It was obvious what happened after they took the regular hose clamp off the intake of the air cleaner. The hard plastic did not seal and dusted the engine. Found out at that time 10% of the busses sold had that problem. Cummins, Donaldson, and Freightliner rebuilt the engine and the fix was a rubber band that is to keep the seal, tested up to a specific vacuum to prevent leaks!
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