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 MaxxForce7 lifter roller ruined the cam!!!
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/09/2015 :  12:38:30 PM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Engine sounded like a giant air compressor LOL...you could hear the compression coming through the air filter. The same thing happened to one of our VT365 2 years ago, we replaced that engine. We'll be repairing this one.[URL=http://s253.photobucket.com/user/tootsie1980/media/48cam.jpg.html][/URL]

Fastback
Top Member

1500 Posts

Posted - 10/09/2015 :  1:19:12 PM  Show Profile  Reply with Quote
What year/miles is that one?

Why yes, the ORIGinal CHARGER is a Fastback
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/09/2015 :  1:40:43 PM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
2010 47000mi
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Fastback
Top Member

1500 Posts

Posted - 10/09/2015 :  2:24:37 PM  Show Profile  Reply with Quote
Just curious if you found out anything from Cummins dealer about possible repowers of Maxx 7 units?

Why yes, the ORIGinal CHARGER is a Fastback
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Cal Mc
Advanced Member

303 Posts

Posted - 10/10/2015 :  10:03:04 PM  Show Profile  Visit Cal Mc's Homepage  Reply with Quote
We just had a Maxxforce DT do something similar. Broke a dogbone, took out the cam and spun a cam bearing. Just made warranty...a new long block on order.
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/12/2015 :  04:14:08 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
@Fastback I pitched the idea to the boss and he shot it down before I did any research on re powering it with a Cummins.

@Cal Mc we had a DT do the same, the fix for it was to double up on the dogbones. I had a thread on here showing what happened but I can't find it anymore to post the link.
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Fldawg
Active Member

15 Posts

Posted - 10/12/2015 :  06:46:15 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
just done one on a 2008 maxx force dog bone broke #2 cyl. lifter jumped sideways did'nt get any cam bearings but reaked havoc on my oil pump. enjoy the job. big time pain in the butt. You did'nt pull the engineto do that did you?
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JoeHEB1
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498 Posts

Posted - 10/12/2015 :  12:56:04 PM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
I did pull the engine. See it suspended in the background? The cam has to come out from the rear, the flywheel housing has to come off to get the cam out. So while we have it out we'll replace every seal on it. Yeah it is a big PAIN!!
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krmvcs
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362 Posts

Posted - 10/12/2015 :  2:14:18 PM  Show Profile  Reply with Quote
im super jealous. not about the job you have to do but the shop you get to do it in. wish i had a cool chain hoist, smooth painted floors and more than one bay.

-Ken-
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/13/2015 :  04:13:20 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Our shop is pretty state of the art, we just moved in a little over 2 years ago. It's a whole brand new facility with 9 bays and 2 giant pits. I just wish we had a tech for each bay, keep dreaming my boss keeps telling me.LOL
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Fldawg
Active Member

15 Posts

Posted - 10/15/2015 :  04:15:48 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
quote:
Originally posted by krmvcs

im super jealous. not about the job you have to do but the shop you get to do it in. wish i had a cool chain hoist, smooth painted floors and more than one bay.



That's the first for hearing the cam has to come out the back, all the ones i've done i pulled the cam out the front, left the engine in the bus , but mine was a 2008 maxx force , i might be showing my ignornce, but with international they change things for the worst
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/15/2015 :  05:19:57 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
MaxxForce7 is all gear driven from the rear. See pic of the rear of the engine.[URL=http://s253.photobucket.com/user/tootsie1980/media/48rearofengine.jpg.html][/URL]
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Fldawg
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15 Posts

Posted - 10/15/2015 :  06:15:45 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
quote:
Originally posted by JoeHEB1

MaxxForce7 is all gear driven from the rear. See pic of the rear of the engine.[URL=http://s253.photobucket.com/user/tootsie1980/media/48rearofengine.jpg.html][/URL]



We don't have any of those, learn something new everyday we went straight to the twin turbo engine and then to the new cummins
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JoeHEB1
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498 Posts

Posted - 10/15/2015 :  06:36:08 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Lucky you!!!LOL you don't want these hunk of junk, they're nothing but trouble just like it's brother VT365. We to have the twin turbo DT's and just got 9 new BB with Cummins.
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Fldawg
Active Member

15 Posts

Posted - 10/15/2015 :  06:43:28 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
quote:
Originally posted by JoeHEB1

MaxxForce7 is all gear driven from the rear. See pic of the rear of the engine.[URL=http://s253.photobucket.com/user/tootsie1980/media/48rearofengine.jpg.html][/URL]



We don't have any of those, learn something new everyday we went straight to the twin turbo engine and then to the new cummins
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JoeHEB1
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498 Posts

Posted - 10/19/2015 :  05:50:18 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Update: As expected front cover and oil pump ruined.[URL=http://s253.photobucket.com/user/tootsie1980/media/481.jpg.html][/URL][URL=http://s253.photobucket.com/user/tootsie1980/media/482.jpg.html][/URL][URL=http://s253.photobucket.com/user/tootsie1980/media/483.jpg.html][/URL]
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Fastback
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1500 Posts

Posted - 10/21/2015 :  04:57:56 AM  Show Profile  Reply with Quote
quote:
Originally posted by Fldawg

quote:
Originally posted by krmvcs

im super jealous. not about the job you have to do but the shop you get to do it in. wish i had a cool chain hoist, smooth painted floors and more than one bay.



That's the first for hearing the cam has to come out the back, all the ones i've done i pulled the cam out the front, left the engine in the bus , but mine was a 2008 maxx force , i might be showing my ignornce, but with international they change things for the worst



For the record, the cam has to come out the back on Cummins ISBs also. Only exceptions are the ones installed in Dodge pickups that have a front gear train.

Why yes, the ORIGinal CHARGER is a Fastback
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mastertech
Advanced Member

274 Posts

Posted - 10/23/2015 :  4:37:29 PM  Show Profile  Visit mastertech's Homepage  Reply with Quote
Kind of funny they didnt have a easily changed, low cost wear plate on the front cover when the oil pump gets lunched. Has anyone had the gouges welded back up and remachined?
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/26/2015 :  04:11:55 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
@mastertech the front cover by itself is over $700 OUCH!!! Not sure what it would cost to repair the oil pump but a new one is $270
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Fastback
Top Member

1500 Posts

Posted - 10/26/2015 :  04:18:07 AM  Show Profile  Reply with Quote
Curious as to the final price tag on this repair?

Why yes, the ORIGinal CHARGER is a Fastback
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Fldawg
Active Member

15 Posts

Posted - 10/26/2015 :  04:23:37 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
on my 2008 maxx force, parts alone was about $4000 + my labour , had to change oil pump and it was almost $800, so i can only imagine what this repair cost.
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/26/2015 :  05:25:11 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
So far it's just over 5K including the tools we had to buy to install the front main seal. We already had the rear seal tool. Tools ain't cheap either.
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second.flood
Top Member

USA
640 Posts

Posted - 10/28/2015 :  03:51:42 AM  Show Profile  Reply with Quote
Anyone add the extra dogbone prior to a failure? Is it so widespread that we should retrofit?
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JoeHEB1
Advanced Member

498 Posts

Posted - 10/28/2015 :  09:05:17 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
I would take my chances, you may never have a problem with them. So far I've had one DT get ruined out of 20.
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Fldawg
Active Member

15 Posts

Posted - 10/28/2015 :  10:10:49 AM  Show Profile  Visit Fldawg's Homepage  Reply with Quote
quote:
Originally posted by second.flood

Anyone add the extra dogbone prior to a failure? Is it so widespread that we should retrofit?



That is internationals answer to the probelm, i've done 3 cams in the last 2 years and i double up the dogbones everytime
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BJ Henderson
Advanced Member

USA
280 Posts

Posted - 10/29/2015 :  06:13:44 AM  Show Profile  Send BJ Henderson an AOL message  Reply with Quote
This is what happens when you are using a hydraulic systems that is constantly being contaminated with unburned carbon from the engine.

CMTT,CMAT,CMBT
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slippert
Top Member

USA
630 Posts

Posted - 10/29/2015 :  08:12:25 AM  Show Profile  Click to see slippert's MSN Messenger address  Reply with Quote
quote:
Originally posted by BJ Henderson

This is what happens when you are using a hydraulic systems that is constantly being contaminated with unburned carbon from the engine.



Agree,

The inlines are not immune from cam issues either, lost 3 cams in 2008 and 09 buses..... Just found out one of my Maxxforce DT's with twin turbos needs cam and lifters replaced, luckily it is under warranty barely! 146,000 miles and 1 month before 5 years... Cummins is the way to go IMO... Along with the 10 year unlimited milage service contract from Cummins.....
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Cal Mc
Advanced Member

303 Posts

Posted - 11/03/2015 :  9:24:38 PM  Show Profile  Visit Cal Mc's Homepage  Reply with Quote
Just saw the bill going to warranty to replace our MaxxForce DT long block....$23,000
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JoeHEB1
Advanced Member

498 Posts

Posted - 11/04/2015 :  04:07:18 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
We weren't so lucky when our DT gave up the ghost.
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JoeHEB1
Advanced Member

498 Posts

Posted - 11/17/2015 :  09:56:31 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Update: total cost $6200. New long block $12000.
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Fastback
Top Member

1500 Posts

Posted - 11/17/2015 :  1:27:05 PM  Show Profile  Reply with Quote
quote:
Originally posted by JoeHEB1

Update: total cost $6200. New long block $12000.



Can I assume those are your costs and do not include labor?

Why yes, the ORIGinal CHARGER is a Fastback
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JoeHEB1
Advanced Member

498 Posts

Posted - 11/17/2015 :  1:44:50 PM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
You are correct, our district does not factor in any labor rate in any repairs we do. They figure that the labor (salary) is already paid for the whole school year. If it takes you 2 hours to replace a headlight, the district sees it as $4.99 (cost of headlight) repair. The 2 hours of labor are already paid when the budget was set for the school year. Weird huh??? I think so to.
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JRob
Advanced Member

207 Posts

Posted - 11/17/2015 :  3:16:06 PM  Show Profile  Visit JRob's Homepage  Reply with Quote
It would still be worthwhile to assign a labor value to all repairs whether routine or non-routine maintenance. You could then really dial in the total cost of ownership by unit in your fleet. Every hour of labor completing repairs that are non-routine or not preventative maintenance takes away from the time you could be spending doing PM work. Also, not all maintenance items are created equal. High labor repairs have an opportunity cost of time lost in the shop. Somebody should want to know that.
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JoeHEB1
Advanced Member

498 Posts

Posted - 11/18/2015 :  04:04:32 AM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
quote:
Originally posted by JRob

It would still be worthwhile to assign a labor value to all repairs whether routine or non-routine maintenance. You could then really dial in the total cost of ownership by unit in your fleet. Every hour of labor completing repairs that are non-routine or not preventative maintenance takes away from the time you could be spending doing PM work. Also, not all maintenance items are created equal. High labor repairs have an opportunity cost of time lost in the shop. Somebody should want to know that.


Agree..
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sambrutay
Advanced Member

United States
271 Posts

Posted - 11/25/2015 :  03:21:15 AM  Show Profile  Reply with Quote
cost for Cummins repower is a little over 26K. that's turn key.

Bruce
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Fastback
Top Member

1500 Posts

Posted - 11/25/2015 :  07:09:25 AM  Show Profile  Reply with Quote
quote:
Originally posted by sambrutay

cost for Cummins repower is a little over 26K. that's turn key.




Yeah, and that gives you a 5 year 100k warranty, a bus that has resale value and you have confidence in. Not to mention, Cummins also claims a 17% fuel economy increase.

Why yes, the ORIGinal CHARGER is a Fastback

Edited by - Fastback on 11/25/2015 07:10:29 AM
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