Wanderlodge Owners Group  
BuyByeBlueBird.com
Donate

Go Back   Wanderlodge Owners Group > Mechanic's Corner > Engine

Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

Site Search:
Reply
 
Thread Tools
  #21  
Old 08-15-2009
fxdwg fxdwg is offline
Senior Member
 
Join Date: Mar 2008
Location: okc
Posts: 3,843
Default

Here's something to think about. We use the hydraulic system for power steering as well as the fan. So removing the fan will not remove the engine drag of the hydraulic pump, only the fan motor. Something else is that for the year and 7000 miles I've had mine, I only had minimal fan function as the fuse was blown. My engine temps only got to 205 after running 30 miles or so at 80-85. And I was running the dash A/C with outside temps just above 100. That's the highest I've ever seen my engine temps.

I guess what I'm trying to say is the "Prevost" conversion is going to be probably the high side of $8500 ($5000 labor $3000 parts). While this MAY be a great conversion, I wonder if it's worth it, since we now know who the OEM supplier is.
__________________
John
96 WTOS 42'
OKC USA!


don't waste your time with a usa-spec ipod adapter- poor products with poor support
Reply With Quote
  #22  
Old 08-15-2009
davidmbrady
Guest
 
Posts: n/a
Default

Jeff,

Thanks for the proposal. It's hard enough finding someone to work on these
Birds much less someone willing to offer novel solutions. I'm very excited to
rid my bus of the complex fan hydraulics. The original system is plagued by
hydraulic PTO, fan motor, and speed modulating PWM failures. My '02 system
seems to be functioning normally; however, on mountain grades in the
southwest in the summer time ( 110 deg ambient, 6% plus grades), the eng
temp will climb to 205 at which point I downshift and reduce power to
manage engine heat. What kind of performance does a typical S-60 equipped
Prevost experience under these conditions and with the upgrade, can a BB
owner expect the same?

Last edited by davidmbrady; 08-15-2009 at 04:29 PM.
Reply With Quote
  #23  
Old 08-15-2009
davidmbrady
Guest
 
Posts: n/a
Default

Quote:
Originally Posted by fxdwg View Post
Here's something to think about. We use the hydraulic system for power steering as well as the fan. So removing the fan will not remove the engine drag of the hydraulic pump, only the fan motor. Something else is that for the year and 7000 miles I've had mine, I only had minimal fan function as the fuse was blown. My engine temps only got to 205 after running 30 miles or so at 80-85. And I was running the dash A/C with outside temps just above 100. That's the highest I've ever seen my engine temps.

I guess what I'm trying to say is the "Prevost" conversion is going to be probably the high side of $8500 ($5000 labor $3000 parts). While this MAY be a great conversion, I wonder if it's worth it, since we now know who the OEM supplier is.
John,

Our power steering uses the hydraulic reservoir but has it's own pump (mounted on the engine). At least my LXi is this way.

David Brady
'02 LXi, NC
Reply With Quote
  #24  
Old 08-15-2009
Paul Paul is offline
Grand Curmudgeon
 
Join Date: Jan 2008
Location: St. Augustine
Posts: 446
Default

Jeff,

I'm sure we will be talking on Monday. I'm not opposed to letting you have your way with my bird
__________________
This opinion or advice is worth what you paid for it

Paul LaZar
St. Augustine, FL
Former owner of Ziggy
97 wb43
Reply With Quote
  #25  
Old 08-15-2009
davidmbrady
Guest
 
Posts: n/a
Default

Attaboy Paul. I'm all for adding Prevost parts to our beasts. How many parts do we need to add in order to call it a P-bus?
Reply With Quote
  #26  
Old 08-15-2009
Randy Dupree's Avatar
Randy Dupree Randy Dupree is online now
Forum owner
 
Join Date: Dec 2007
Location: Archer,Fl
Posts: 34,245
Default

How does the prevost fan drive work?
belts off the engine to a right angle gear drive?
__________________
DO NOT SEND PM
email me at randy@randydupree.com only.

Randy Dupree
2000 LXI 43
Bainbridge,Ga.
Archer Fl.
www.buybyebluebird.com

randy@randydupree.com
Reply With Quote
  #27  
Old 08-15-2009
davidmbrady
Guest
 
Posts: n/a
Default

That's what I've seen Randy. I've also seen this airbag contraption that adds or releases tension to the belts to change the speed. Jeff mentioned a multispeed clutch so maybe the airbag isn't used.

Jeff, what fan speeds does the Prevost stuff run at?
Reply With Quote
  #28  
Old 08-15-2009
Paul Paul is offline
Grand Curmudgeon
 
Join Date: Jan 2008
Location: St. Augustine
Posts: 446
Default

David, I don't see that the change will benefit much, but Jeff has been right on a number of things so far. Considering I haven't had any problems with the hydraulics in 12 years and 100,000 miles, it's gonna be a hard sell, but will listen and consider doing it.

Randy, The Prevost system runs off triple fan belts on the crank pulley (we have a spare two unused pulley slots). It does use a right angle gear box.

I'm not a mechanical engineer (Hish where are you?) but I don't think the mechanical system is less "lossy" the the hydraulic system.

Jeff, our hydraulic systems are two speed like the Prevost.
__________________
This opinion or advice is worth what you paid for it

Paul LaZar
St. Augustine, FL
Former owner of Ziggy
97 wb43
Reply With Quote
  #29  
Old 08-15-2009
Randy Dupree's Avatar
Randy Dupree Randy Dupree is online now
Forum owner
 
Join Date: Dec 2007
Location: Archer,Fl
Posts: 34,245
Default

i just remembered I have a prevost on my buybyebluebird site,with a pic of the engine.
the air bag keeps the belt tension correct,its a neat set up.
__________________
DO NOT SEND PM
email me at randy@randydupree.com only.

Randy Dupree
2000 LXI 43
Bainbridge,Ga.
Archer Fl.
www.buybyebluebird.com

randy@randydupree.com
Reply With Quote
  #30  
Old 08-15-2009
davidmbrady
Guest
 
Posts: n/a
Default

Paul, you're probably right, mechanical efficiency is most likely similar. What I want is a greater thermal efficiency: a bigger heat sink. More BTU's sunk, less worry of overheat, higher densities from the intercooler (more power), more room to tune the motor. Did I say more power?

BTW, I've been told that 2000 hrs is around lifetime for hydraulic equipment (of course ours isn't run at full power for the entire interval), so at 100K miles it may be time to renew the Chelsea PTO, the PWM, and the Fan Motor. (Expensive).

Last edited by davidmbrady; 08-15-2009 at 06:10 PM.
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Air Filter 94 PT Part Number Rob Robinson PT and WB Parts List 10 08-29-2010 09:40 PM
part number pozz 33 Engine 1 05-29-2009 10:11 PM
Transmission part number 250 turbo gcyeaw Transmission 1 10-24-2008 11:42 PM
Height Valve Part Number aaronw Tires, Wheels, Brakes, Steering and Suspensions 2 09-29-2008 04:36 PM
Air filter part number RGloverii SP (Single Axle Pusher Unique Issues) 7 05-16-2008 10:17 PM

Web Search:

All times are GMT -4. The time now is 01:53 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.