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(Moderator:
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8v71 won,t stay running
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Topic: 8v71 won,t stay running (Read 9426 times)
bobsw
Jr. Member
Posts: 90
Re: 8v71 won,t stay running
«
Reply #15 on:
April 06, 2009, 08:50:29 PM »
A lot of people say that the fuel pump on the 8-71 / 8-92 are almost bullet proof but I have had to replace mine twice. This is one of the spare parts that I don't travel without.
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73 MCI-7
buswarrior
Hero Member
Posts: 6569
the old one: '75 MC8 with an 8V71 HT740
Re: 8v71 won,t stay running
«
Reply #16 on:
April 06, 2009, 11:55:00 PM »
Here at Big Transit, with a forest of 6V71 running not so long ago...
I have a distant memory, oh, back a decade or a little more, about a broo-hah-hah over the drive for one of the accessories.
The one that was being used was failing prematurely, and there was an upgraded one. One cast, one machined.
Wonder if it's related...?
happy coaching!
buswarrior
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Frozen North, Greater Toronto Area
new project: 1995 MCI 102D3, Cat 3176b, Eaton Autoshift
JackConrad
Orange Blossom Special II
Hero Member
Posts: 4448
73' MC-8 8V71/HT740 Southwest Florida
Re: 8v71 won,t stay running
«
Reply #17 on:
April 07, 2009, 04:34:58 AM »
I recently watched a mechanic replace the fuel pump on a 8V92. He also replaced the little "drive thingy". When I inspected the drive , I noticed it was not cast and that both of the "ears" were bent slightly. I do not know what caused the ears to bend slightly, but the mechanic said "that is why I always replace the drive when replacing a pump" Jack
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Growing Older Is Mandatory, Growing Up Is Optional
Arcadia, Florida, When we are home
http://s682.photobucket.com/albums/vv186/OBS-JC/
bobsw
Jr. Member
Posts: 90
Re: 8v71 won,t stay running
«
Reply #18 on:
April 07, 2009, 06:57:37 PM »
I did it right the second time and replaced the drive ears.
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73 MCI-7
Lin
Hero Member
Posts: 5531
1965 MC-5a
Re: 8v71 won,t stay running
«
Reply #19 on:
April 07, 2009, 07:24:37 PM »
I have an extra fuel pump that I found in the bus when I got it. How would I tell if it is any good (without installing it, of course).
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You don't have to believe everything you think.
Dreamscape
Dreamscape
Global Moderator
Hero Member
Posts: 3483
1968 Silver Eagle Model 01 8V92T Allison 740 #7443
Re: 8v71 won,t stay running
«
Reply #20 on:
April 07, 2009, 08:01:27 PM »
First check the voltage, then take the pos wire and put it on a good batt, tapping the ground wire on the post to see if you have fire.
~Paul~
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______________________________________________________
Our coach was originally owned by the Dixie Echoes.
Lin
Hero Member
Posts: 5531
1965 MC-5a
Re: 8v71 won,t stay running
«
Reply #21 on:
April 07, 2009, 08:33:15 PM »
It's a mechanical fuel pump like the one on my 8v71 engine. Sorry I did not mention that.
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You don't have to believe everything you think.
Van
Hero Member
Posts: 3263
Re: 8v71 won,t stay running
«
Reply #22 on:
April 07, 2009, 08:42:48 PM »
In the manual ,when replacing the fuel pump,it's strongly advised to check the little drive connector plate when removing the pump.Bringing our Eagle home blew a fuel pump in Amarillo,fuel pump main shaft sheered in half due to fuel starvation (collapsed supply line),new pump and 1 drive key later back on the road.
to check the pump you will have to disassemble the pump and inspect the drive gear,pinion ,bushings etc.try turning the square end of the drive shaft,any major resistance? Usually there is a big core charge ,you can get them new(reliabuilt)from DD,a very good spare part to have in the pinch.good luck . Van
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B&B CoachWorks
Bus Shop Mafia.
luvrbus
Hero Member
Posts: 26067
Re: 8v71 won,t stay running
«
Reply #23 on:
April 07, 2009, 08:44:19 PM »
Lin, spin the pump with a drill in a little fuel covering the pump if you can not stop the fuel with your finger it will be good or you can check it with a gauge on the out side at 65#. make sure no fuel leaks from the weap holes and you are good to go
Are you coming this way soon we will be leaving here around the 17th heading to Texas and on to Breaux Bridge for the Eagle rally and will be back May 10/12
good luck
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Life is short drink the good wine first
Dreamscape
Dreamscape
Global Moderator
Hero Member
Posts: 3483
1968 Silver Eagle Model 01 8V92T Allison 740 #7443
Re: 8v71 won,t stay running
«
Reply #24 on:
April 08, 2009, 05:26:27 AM »
Quote from: Lin on April 07, 2009, 08:33:15 PM
It's a mechanical fuel pump like the one on my 8v71 engine. Sorry I did not mention that.
Ooooops!
~Paul~
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______________________________________________________
Our coach was originally owned by the Dixie Echoes.
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8v71 won,t stay running
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