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Side Radiator vs Rear in Diesel Pusher


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#1 Monkeyrun

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Posted 05 April 2013 - 07:04 AM

Wife and I have been looking for a diesel pusher in my price range for a year. The one we may purchase is a 1999 Allegro BUS39 with 76K miles and 2k hours on the genset. It is well maintained but does have some water damage below the two windows in the rear bedroom, something I can fix. 

 

We also looked at several Dutch Star pushers, the latest one a 1998 with 56k miles and 100 hours on the genset but not as well maintained as the BUS. One big difference I see is the engine access and also the genset slides out the front on the DS. Other than that, we like the BUS over the DS, they are the same price. The DS needs six tires, the BUS will need fronts in a year or two. 

 

My question is, how much of a factor should the additional, rear access to the engine and slide out access to the genset (in the DS) be if I am figuring that into a weighted decision between the two? 

 

First time buyer, confused and frustrated at times but enjoying the adventure.  :D

 

Thanks for any assistance you can provide!

 

MR


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Best regards,

 

 

Monkey Run 

Ole' Number 7

Allegro Bus 39

 


#2 wolfe10

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Posted 05 April 2013 - 07:15 AM

MR,

 

I'll get the list started.

 

Advantages of Side Radiator:

 

Easier engine access which translates to less expensive repair of things like alternator, water pump, belt changes, etc. And, even among rear radiator coaches, there is quite a wide range of service access from "top of engine". Some are  easily accessed (you can climb into engine room), others have only small, difficult to access service doors under the bed/closet.

 

Usually a little better MPG, since the cooling fan can be set up as a two speed fan or variable speed fan.  The vast majority of rear radiators are constant drive fans.

 

Easier to clean and less prone to clogging up.

 

 

Disadvantages of Side Radiator:

 

More expensive to build.

 

More complex mechanically [hydraulic pump and fan motor(s)]


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Dianne and Brett Wolfe
1997 Safari Sahara 3540
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#3 Monkeyrun

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Posted 05 April 2013 - 07:25 AM

Thank you Wolfe. Any opinion relative to the genset? Obviously slide out would be easier but since the hood cable broke when we were looking at the BUS I was unable to see just how good/bad the access would be to the Quite Power Diesel generator. I could see that it is housed in some kind of a box which IMHO could be an issue. 


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Best regards,

 

 

Monkey Run 

Ole' Number 7

Allegro Bus 39

 


#4 wolfe10

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Posted 05 April 2013 - 07:34 AM

The answer to the generator question depends not only on whether it on a slide or not, but also exactly which generator it has.

 

Said another way, some generators have the majority of their service items accessible even when installed in a fixed location. Others have to be pulled/dropped to reach some service items. 

 

My suggestion is to copy down the make/model of the generator and either call the generator manufacturer or look at their website for location of routine service components.

 

Brett


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Dianne and Brett Wolfe
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#5 Monkeyrun

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Posted 05 April 2013 - 08:31 AM

I am not certain that this generator does not slide out the front. We could not get the top panel of the hood open due to the cable breaking, it opened only part way, enough for me to peek inside. If you look at the front of a 1999 BUS you can see that there is another panel below the top section which leads me to believe it might slide out or at least fully open on the bottom section which would provide very good access. The salesman was of no help. I may call the previous owner. 


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Monkey Run 

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Allegro Bus 39

 


#6 desertdeals69

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Posted 05 April 2013 - 09:09 AM

Usually the rear radiator is on a smaller engine such as a Cummins ISB and the side readiator is on the larger ISC or bigger.


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#7 Monkeyrun

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Posted 05 April 2013 - 09:28 AM

This is an 8.3 Cummins, not certain about the letter designation. 


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Best regards,

 

 

Monkey Run 

Ole' Number 7

Allegro Bus 39

 


#8 desertdeals69

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Posted 05 April 2013 - 04:16 PM

That would be an ISC 1998 or newer.


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#9 Monkeyrun

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Posted 05 April 2013 - 04:50 PM

Thanks, did not know that desertdeals. 

 

I am getting cold feet, seems more issues than I can imagine on these coaches. Perhaps I need to look at the Wanderlodges again, gave on them up due to none in my area that appeared road ready, yet they are at a fairly steep price. 


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Best regards,

 

 

Monkey Run 

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Allegro Bus 39

 


#10 Markstella

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Posted 06 April 2013 - 08:22 AM

I'd go with a side rad.  As mentioned above, service is a lot easier.  Take a look at the rear rad. and see if you can notice dirt and oil residue on the engine side of it.  A lot of the older coaches didn't have the slobber tube run properly causing blow back onto the rad. making it a night mare to clean due to limited access to it.  This crude has a tendency to make the engine run hot.


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#11 desertdeals69

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Posted 06 April 2013 - 09:53 AM

I have a 32 foot with an ISB and rear radiator.  I extended the slobber tube.  I would not trade for a side radiator because of the engine choice.  I got 10.78 mpg going between Albuquerque and Las Vegas last October.  With the larger engine and coach it would be in the 6.5 to 8 mpg range. Just my own preference.


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#12 Monkeyrun

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Posted 06 April 2013 - 09:07 PM

That much difference in mileage? 


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Best regards,

 

 

Monkey Run 

Ole' Number 7

Allegro Bus 39

 


#13 desertdeals69

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Posted 06 April 2013 - 09:21 PM

Yes, there seems to be.  Also I was towing a 1/2 ton Silverado, V6 5 speed.  Unless extreme hills or headwind I have averaged between 10 and 11 mpg for the last 100,000 miles.


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