Barring over 8V71

richard5933 · January 04, 2020, 01:05:45 PM

Trying to help a guy check to see if his engine is stuck.

He's got an 8V71 in a Buffalo, mated to a V730. There is a hydraulic fan on the pulley end of the engine.
Where would he turn the thing over from? Is there an access plate on the bell housing where he can use a pry bar, or is there some other place. He's not seeing anything on the end of the crankshaft - seems that the fan drive is in the way.

luvrbus · January 04, 2020, 02:00:25 PM

He should be able to turn it at the pulley nut takes a 1-1/2 socket,

richard5933 · January 04, 2020, 02:16:12 PM

Quote from: luvrbus on January 04, 2020, 02:00:25 PM
He should be able to turn it at the pulley nut takes a 1-1/2 socket,

Which pulley nut? The only one pulley he can find is the one higher up towards the rear cylinder bank. He says that the fan assembly is blocking any access to the crankshaft pulley. Is there one back that that he's missing?

luvrbus · January 04, 2020, 04:21:07 PM

There is a v belt pulley on the lower head camshaft says 8v71 t turn the engine there the muffler may be hiding it they do on a 4106 I can do a photo for you if it helps

luvrbus · January 04, 2020, 04:25:10 PM

Here is the pulley

richard5933 · January 05, 2020, 09:27:14 AM

Sounds like the engine is stuck.
Anyone have a rough guess what the engine/tranny/cradle weighs? How big a forklift is needed? He's thinking of pulling it to take to a heated shop to do the repairs.

luvrbus · January 05, 2020, 09:47:23 AM

Just under 4000 lbs with the cradle

buswarrior · January 05, 2020, 12:17:17 PM

Building the jig for removing the cradle makes life much nicer.

The jig is your engine stand for working on it, helps remove the cradle from the bus, and gives handy safe way to engage the forklift.

Nobody brags of damaging their engine trying to fork it out alone...

The jig plans are in the old maintenance manuals someplace.

Happy coaching!
Buswarrior

richard5933 · January 05, 2020, 12:29:09 PM

Quote from: buswarrior on January 05, 2020, 12:17:17 PM
Building the jig for removing the cradle makes life much nicer.

The jig is your engine stand for working on it, helps remove the cradle from the bus, and gives handy safe way to engage the forklift.

Nobody brags of damaging their engine trying to fork it out alone...

The jig plans are in the old maintenance manuals someplace.

Happy coaching!
Buswarrior

I'll pass this along...
If he decides to go the route of removing it, he's going to have to do it while the bus is parked on gravel using a fork lift, and then take it to his shop 100s of miles away. Bus is safe where it is, but too cold for him to continue working outside on it.

Utahclaimjumper · January 05, 2020, 05:48:58 PM

I would pull the injectors,, then try to turn it over,, if nada you haven't lost anything.>>>Dan

luvrbus · January 05, 2020, 06:19:50 PM

Hard to damage a 8v71 on the cradle from a GM with a fork lift or a pallet jack,I guess it could happen if you worked at it long enough

Utahclaimjumper · January 05, 2020, 07:21:12 PM

It's really not difficult to put jacks under the cradle,, unbolt it,, and push the bus away from it.>>>Dan

dtcerrato · January 05, 2020, 07:51:44 PM

That's the way I used to do VW Vans.

little easier to push too!

chessie4905 · January 06, 2020, 03:05:59 AM

I think he would be better off having it hauled back home. Hauling engine cradle back and forth, although cheaper, would be a major pita due to all the little issues, especially this time of the year.

luvrbus · January 06, 2020, 05:15:14 AM

He does need to get the bus home,because it has major problems and it is not fun working on it the dirt I won't do it .I have a guy in the shop now been here for over a year that is carrying on a long distance 1200 mile relation ship with his bus