Ene of the line for CMD

[Latestarter1]

All over now the shouting has been done.........

http://www.cummins.com/cmi/displayM...InvestorsAndMedia/PressReleases/2011/1Dec2011

 

[david_bagshaw]

The link doesnt work

 

[Latestarter1]

http://www.cummins.com/cmi/displayM...tionCMDjv&dtPublishDate=2011-12-01+12:38:00.0

 

[onlyme]

Try http://www.cummins.com/cmi/index.jsp, it is the news item dated 1st Dec 2011

 

[volvopaul]

Maybe there will be a shake up at the swan wick office, there is only a couple of people there that actually take the time to be nice to you when your there, both female I hasten to add.

 

[Latestarter1]

Maybe there will be a shake up at the swan wick office, there is only a couple of people there that actually take the time to be nice to you when your there, both female I hasten to add.

Things have improved, service manager...........gone!

 

[tinkicker0]

Hope Cummins get their act together with their regional parts distribution and service centres, customer service is a concept that they seem to have forgotten.

 

[volvopaul]

I was talking to one of there engineers a while back, the conversation led me to believe he had very little faith in the back up, the problems he discussed with me over the pod drive system gave me no faith in the products reliability whatsoever, married into the sc47 not a great combination for reliability he told me, I do wonder where it will go, I love the engine in its standard drive train design, im about to service a pair of qsb 425s next week in a boat, I may feed back and compare how hard or easy they are to service over say its equivalent green motor.

 

[tinkicker0]

I was talking to one of there engineers a while back, the conversation led me to believe he had very little faith in the back up, the problems he discussed with me over the pod drive system gave me no faith in the products reliability whatsoever, married into the sc47 not a great combination for reliability he told me, I do wonder where it will go, I love the engine in its standard drive train design, im about to service a pair of qsb 425s next week in a boat, I may feed back and compare how hard or easy they are to service over say its equivalent green motor.

Dead easy. When you have the lid off to do the top set, look closely at the rocker pad / crosshead contact area, esp the exhaust rocker. If it looks to be wearing, you need to pull the rocker and clean out the rocker pad oil gallery. The crosshead needs to be replaced too.

Unlike original Cummins, with proper crosstrees, these crossheads are only held in place by the valve clearance ala MAN D0834/6 and if this gets too large as with the crosshead worn beyond the case hardening, then the cross head will jump out and jam the valves open.

Oh and the cam is made of chocolate just to help it along. Keep an eye on rocker travel as you turn the motor, see one that does not appear to have as much lift and you need to get a gauge on it.

At least on the QSB, the cam can be replaced from the front without removing the rear flywheel housing / gear cover, unlike the ISB. This means the cam can be removed with a minimum of fuss using bamboos down the pushrod tubes to hold the tappets.

Hope this helps.

 

[Latestarter1]

Dead easy. When you have the lid off to do the top set, look closely at the rocker pad / crosshead contact area, esp the exhaust rocker. If it looks to be wearing, you need to pull the rocker and clean out the rocker pad oil gallery. The crosshead needs to be replaced too.

Unlike original Cummins, with proper crosstrees, these crossheads are only held in place by the valve clearance ala MAN D0834/6 and if this gets too large as with the crosshead worn beyond the case hardening, then the cross head will jump out and jam the valves open.

Oh and the cam is made of chocolate just to help it along. Keep an eye on rocker travel as you turn the motor, see one that does not appear to have as much lift and you need to get a gauge on it.

At least on the QSB, the cam can be replaced from the front without removing the rear flywheel housing / gear cover, unlike the ISB. This means the cam can be removed with a minimum of fuss using bamboos down the pushrod tubes to hold the tappets.

Hope this helps.

Hey Tinkicker you have been working on too many British buses.

After I retired I did some work for KMB Kowloon Motor Bus. Guys from Hong Kong thought that British bus operators were on drugs, annual oil drains on dubious quality lubes, NEVER adust the overhead etc etc. Third world stuff. In Hong Kong Cummins L10's were a nose ahead of Volvo TD 103's in three axle double deck operation. We had Dennis Darts Vs Volvo B6's in other words Cummins B Series Vs Volvo D6's and the B Series was doing over 25% percent better in terms of life to overhaul than Volvo D6 on the same duty cycle. And FAR cheaper to overhaul when they had done their time. MAN came nowhere near Cummins or Volvo, the Chief Engineer simply viewed MAN engines as 'soft'. When left over 50 of the container handlers were having Volvo 60's being replaced with B's. Just to clarify comments regarding bamboo sticks you get a camshaft replacement 'tool' open the box, inside are twelve wooden sticks and some elastic bands! Concept works like a dream, but whacky or what!

Paul, do not even bother lifting the rocker cover on the QSB. I have been overseeing some QSB's in tourist boats in the US since 2006. Our original plan was to strip at 12,000 hours. However no blow-by so we went for 15,000 hours. On teardown crank was was still within spec on mains, pins were marginal. New crank was same price as grinding the pins. Bores were just suitable to go again, however #5 had injested a small quantity of water, so we bored #5 1st oversize and honed the other five. Engine back in service with plan to tear down again at 10,000 hrs. However motors get oil and filters every six weeks.

If you can send me your email address I have SmartCraft manual as well as the documents on changes to seawater pump drive arrangement, from adjustable idler to mainteinance free stretch belt. Aftercooler service??