| Author |
Message |
Steven Braud (65.132.37.103)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 09, 2004 - 12:39 am: | |
How much trouble is it to change a RH rotation 8v71 to LH rotation and is it worth it? I looked in the archive but could not find the answer I needed. Probably didn't word the search correctly. |
Derek (Derek_L) (24.83.196.239)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 09, 2004 - 1:27 am: | |
It depends on your coach; if you've got a V drive you need a left hand rotation engine; if you have a T drive you need a right... No two ways about this, unless you want to swap have have 1 forward gear and x reverse...
...where x = your current number of forward gears. |
Marc Bourget (209.142.38.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 09, 2004 - 5:53 am: | |
Geoff Smith has commented on this many times. I never bothered to memorize out of convenience and lack of need.
IIRC, it was rarely cost effective due to the availability of engines (at the time) This may have changed due to the drop in avialability of these engines, however.
Onward and Upward |
Derek (Derek_L) (24.83.196.239)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 09, 2004 - 2:00 pm: | |
Alas, I misinterpereted your post; sorry if I came across in the wrong way... |
Tom Caffrey (Pvcces) (65.74.66.104)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 10, 2004 - 12:08 am: | |
Steven, I specifically asked this question of a local rebuilder who has been in the business many years. He said that there were too many changes for it to be worth it.
As to the question on rotation, some of the vee drive transmissions made by Allison and others will take a right hand engine, but you have to have the right transmission.
There were more of these made as the transits started using four stroke engines. Some research is in order if you want to nail this item down.
For what it's worth.
Tom Caffrey PD4106-2576
Suncatcher |
Marc Bourget (209.142.38.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 10, 2004 - 2:18 am: | |
The ability to use a RH engine in a V-drive unit is made possible by a RH adaptor unit which reverses the input to the regular 730-1 trannys
\
I understand it's rare and costs in the $1800 range (but that figure was 3d hand)
Onward and Upward |
John - tng (66.19.72.117)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 10, 2004 - 8:55 am: | |
Gee Steve.... how fast you wanna' go in reverse, anyway? |
Dwight (67.213.8.21)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 10, 2004 - 11:01 pm: | |
Steve, you need to change the oil pump (with pickup tube), the rear gear drive train (timing gears),cam shafts, front and rear crankshaft oil seals (yes they make LH & RH rotation seals) if you have a 8v71 LH you can just take the parts off of it and put them in the 8v71 Rh engine...
all of the stuff above the crankshaft (water pump fuel pump)turn the same way no matter which way the crankshaft turns.
The only thing else I can think of is, in the earlyer engines there were some cranks (mostly on the 6v92) that where built to turn one way, you could get the number off of it and DD could tell you if it can be turned LH or RH.
all of this is from memory but you can double check with your nearest DD dealer, preferably one which fools with marine applications... |
Steven Braud (65.132.36.65)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 11, 2004 - 6:00 am: | |
Thanks for the info guys. I have a '77 AMG with a blown 8v71 with an Allison V-730 trans. I'm just looking at my options for getting the old girl back on the road. There seems to be a lot of RH 8v71's out there for sale. My Dad always said if you keep looking long enough you'll find what you want. Thanks guys, see ya around sometime. |
Marc Bourget (209.142.38.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 11, 2004 - 8:50 am: | |
Dwight,
Will the pieces off a LH 6V71 (like gears) work to reverse rotation on an 8V71?
I know where there's a 6V71 pretty cheap.
Marc |
Jerry Liebler (67.140.167.181)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 11, 2004 - 9:35 pm: | |
Steven,
How is the engine you've got 'blown'? It may be cheaper to repair it than convert a rh to lh. To convert the heads must come off to swap camshafts. the oil pans must come off to swap oil pump and the timing gear train must be redone. Rebuilding yours wouldn't probably wouldn't require dissasembling the geartrain and may not require removing the cams. I just had mine rebuilt after it ate a piston.
Regards
Jerry 4107 1120 |
Steven Braud (65.132.36.30)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 12, 2004 - 6:00 am: | |
The cooling fan came off of it's shaft and before I had realized it the motor was overheated. I was on a bridge when I noticed it and by the time I got to a place that I could pull off of the highway the engine shut down. The engine won't turn over now so I believe that there is extensive damage. I haven't torn the engine down yet to see what has happened to it. I'm afraid that I may have to replace the whole engine. I'm just trying to explore all my options while I wait for time and money to do repairs. Thanks for all the great advice and info that I have found in this board. |
John that newguy (66.19.72.25)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 12, 2004 - 8:43 pm: | |
I would have thought the engine would have dumped...err.. automatically
shut down, long before any damage would have occurred? At the risk
of insulting you, I'm going to ask anyway.... (don't hate me, ehh?)
You -did- check to insure the autostop is reset before trying to turn it
over? I don't know about you, but there have been (many) times that
the tiny, but most significant, issues go right over my head.... wilst I
ran in my circles.. |
Steven Braud (65.132.37.87)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 14, 2004 - 4:48 pm: | |
To John that new Guy, you did not insult me. I'm new at this too. I've never heard of an auto-stop, where is it? How does it work? If I've got one I'l track it down and check it. Thanks |
John that newguy (66.217.105.113)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 14, 2004 - 9:22 pm: | |
Dunno, Steve. I drove 'em, but never paid much attention to how they
managed to work.
I do remember when one driver had the engine dump on him after
an overheat, that the thing wouldn't turn over until the mechanic came
out and reset the mechanism that killed the engine.
Low oil pressure, high water temperature, etc, will cause the system
to kill the engine before any serious damage is done. Re-starting it
is not usually possible until it's reset.... or so what I've learned...
I'm sure someone else here that's more knowledgeable than I, can
give you a better explanation and suggestion. Hang loose until
you get one. No sense worrying about a replacement yet, ehh? |
John that newguy (Unregistered Guest)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 15, 2004 - 10:50 pm: | |
Hey... Still no input Steve? Good grief, I was hoping to read a few
paragraphs on how to reset the auto-kill for a few different brands.
I'll bet there's quite a few of us out here that's driven a bus home
without knowing what to do if the thing dumped on us mid-stream.
Knowing what to reset and how, could save the day! |