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Topic: Auxillary oil pump on 6V92 ? (Read 1289 times) previous topic - next topic

Auxillary oil pump on 6V92 ?

Question .. I have an electric oil pump plumbed to my 6V92 engine. When I turn the ignition key on prior to start up the pump comes on and runs for about 30 seconds and shuts off. Then I turn the key to start, engine fires, and we are on our way. Conversely when I shut down the engine, pump comes on for about 2 minutes and shuts down. Think it is a great feature for startup and cooldown but wondering, was this a standard feature? Have all the manuals but I can find no mention of a pump. PO kept meticulous records so if he added it on later thought there would be some kind of record. what I really need to know is if the pump fails how serious is it?   

Thanks in advance, Steve 
The Starship- 1990 Grandvilla Unihome U300 40ft
6V92 Detroit Diesel w/ 4 spd Allison w/ retarder. Build# 3575 , Foretravel# 17895
The Shuttlecraft- 2015 Ford Explorer
Steve ( N6EKV ) & Lori ( N6JTD ) Faries  w/ Marlee our precious pup.
Patterson CA.

Re: Auxillary oil pump on 6V92 ?

Reply #1 –
Sounds like a prelube/postlube pump,theoredically alot of bearing wear occurs during startup.The postlube would be to cool the turbo,most big industrial engines have these pumps.Would not worry if pump fails but since you have it would keep it in running condition.Amsoil used to sell a kit but stopped a few years ago.Next time you start engine keep an eye on the oil pressure
gauge it should show some pressure during the prelube.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Auxillary oil pump on 6V92 ?

Reply #2 –
Not standard on any vehicles that I know about, but a good feature. As previously mentioned, oiling bearings before loading them is good and the DD 6v92 has a turbo and supercharger, so cooling them down and keeping them oiled while they spool down is good. Take care of it and it will take care of your engine.

Wantabe

Re: Auxillary oil pump on 6V92 ?

Reply #3 –
Excellent system. Many marine diesels have prelube pumps wired to start systems. They are either air or electric powered. Hitting the start button starts the prelube pump. When an oil pressure switch in the oil gallery on the engine reads a certain pressure, pump stops and start motor is actuated. This insures that all bearings are lubricated before any load is put on them,
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Auxillary oil pump on 6V92 ?

Reply #4 –
I don't believe it was standard or even an option with Foretravel.  It's a nice to have, especially for the turbo.
The only issue I can think of in terms of a bad failure is actually when the engine is running and the output line from the pump breaks and oil back flows back out of the engine.  It would all depend on how it was plumbed and I would hope a check valve was installed right on the engine block so you were never trusting a flexible hose of any kind.  If the pump just stops pumping you will be operating  just like the rest of us.

I'm curious to see how they did it and I'm others are too.  If you can, please post photos.  Nice to hear your coach was cared for so well.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Auxillary oil pump on 6V92 ?

Reply #5 –
  I have seen that as a dealer option on heavy equipment, the Cat dealer had an option where they hard lined most all of the grease zerks to 1 or 2 central plates for ease of access and a better chance of getting grease.
88 Grand Villa 36' ORED 3208 (throwaway)Cat.
 Build # 3150
Happiness is the maximum agreement of reality and desire.

Re: Auxillary oil pump on 6V92 ?

Reply #6 –
Wow! I'm jealous! Your PO was a much cooler guy than mine.  >:D Pics would be awesome.

Shouldn't be a problem if it fails. Like JohnFitz says you'll just be like the rest of us.

Thanks for posting.

Don't mean to be to picky but in your sig you show

6V92 Detroit Diesel w/ 4 spd Allison w/ retarder.

I'm pretty sure you have a Jake Brake not a retarder even though it probably says Retarder on your dash switch. Unless of course your PO was Mr MoneyBags and had them fit an Allison retarder in there! I think there was technical issue with that combo.

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: Auxillary oil pump on 6V92 ?

Reply #7 –
Quote from: kenhat –
Don't mean to be to picky but in your sig you show:  6V92 Detroit Diesel w/ 4 spd Allison w/ retarder.

I'm pretty sure you have a Jake Brake not a retarder even though it probably says Retarder on your dash switch. Unless of course your PO was Mr MoneyBags and had them fit an Allison retarder in there! I think there was technical issue with that combo.
Ken,

Just standing on the curb here, watching this thread go by.  Your comment aroused my interest slightly...enough to send me off to Beamalarm to check the specs.

The 1990 U300 is not listed, but the 1991 U300 is.  It shows the same engine (6V92) and the same 4-speed transmission (Allison MTB 648) as Steve's coach.  BUT, it also lists a "transmission retarder brake" as standard equipment.

Then, if I look at the 1992 U300 specs (standard and Silver Anniversary), it lists a "Jake Brake" as standard.

SO, perhaps the 1990 U300 did actually come with a retarder?
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Auxillary oil pump on 6V92 ?

Reply #8 –
Quote from: Chuck & Jeannie –
Ken,

Just standing on the curb here, watching this thread go by.  Your comment aroused my interest slightly...enough to send me off to Beamalarm to check the specs.

The 1990 U300 is not listed, but the 1991 U300 is.  It shows the same engine (6V92) and the same 4-speed transmission (Allison MTB 648) as Steve's coach.  BUT, it also lists a "transmission retarder brake" as standard equipment.

Then, if I look at the 1992 U300 specs (standard and Silver Anniversary), it lists a "Jake Brake" as standard.

SO, perhaps the 1990 U300 did actually come with a retarder?
Hopefully somebody smarter than me will jump in and clear this up. :)

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: Auxillary oil pump on 6V92 ?

Reply #9 –
My 91 has a retarded on it.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Auxillary oil pump on 6V92 ?

Reply #10 –
Quote from: stump –
My 91 has a retarded on it.
Several people have told me the same thing about my coach
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Auxillary oil pump on 6V92 ?

Reply #11 –
Quote from: jcus –
Several people have told me the same thing about my coach...
The federal government approved PC term is now "intellectually disabled"...
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Auxillary oil pump on 6V92 ?

Reply #12 –
Quote from: Chuck & Jeannie –
The federal government approved PC term is now "intellectually disabled"...
Quote from: Chuck & Jeannie –
The federal government approved PC term is now "intellectually disabled"...
Maybe I qualify for a "support" animal. Always wanted to take my ferret to Dennys with me.
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Auxillary oil pump on 6V92 ?

Reply #13 –
We're gonna get "Moderated" here pretty quick.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Auxillary oil pump on 6V92 ?

Reply #14 –
1989 u300 has a retarder standard.  277hp/840 torque.

I had the Detroit guys rerate the later models to 300/820 which was slower.

Guys buddies said "I got 300 hp"  so I changed them

Pt-40 8v92 bluebirds had a preoiler standard
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Auxillary oil pump on 6V92 ?

Reply #15 –
Even a cat 3208 could have been possibly ordered with an MT643R or an MT647R transmission with a transmission retarder in the 80's and

Or even be modified to accept one for many CB's. The R transmission exists but they appear extremley rare, and I understand even the 7xx transmission used on the 6v92 was available with retarder. Somebody must have been asking for them when they ordered a coach, or otherwise they probably wouldn't be there. Just the matter a lot of Coach bucks
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: Auxillary oil pump on 6V92 ?

Reply #16 –
Gentlemen :  Simply cannot thank you all for the help. First, photos coming. Can't get to the barn to at least this weekend but coming as soon as I can. Really thought that this was standard equipment.

John -- You are my hero of the day ( puts you in running for hero of the week ). Thoughts on rubber oil lines and check valves was super. Believe if memory serves me correctly they are. Never thought about check valve but rest assured that project has been moved to the very top of the list. This is a catastrophic failure that can be avoided cheap.

Ken -- It's a retarder. Even dash has factory temp gauge for the torque convertor. I do not have a joystick, is applied when step on the brakes. Still learning exactly how it works best. Pulled Donner Summit a couple times and the Grapevine once and it worked great. Which leads me to.....

Chuck / Old -- I too, am very curious about the pedigree of this rig. From everything I have figured out it seems to be a hybrid of a 1990 and 91. Fred may be on to something. PO said original owner had something to do with an RV magazine and ordered it to his specifications. I still have the original order and related paperwork. Still have the original license plate as well. Oklahoma, last registered in 94 there. Bureaucrats in CA. made me give up PO owners plates.  Will dig it out and let you know what I find. Next I plan too take a lot of pictures, both inside and out, get engine / transmission numbers etc., any kind of name plates, that kind of thing and post them up. Hopefully the assembled multitude can shed some light on exactly what I've got in he barn.

I have, and am, learning a lot from this site. Again, thanks to all, Steve 
The Starship- 1990 Grandvilla Unihome U300 40ft
6V92 Detroit Diesel w/ 4 spd Allison w/ retarder. Build# 3575 , Foretravel# 17895
The Shuttlecraft- 2015 Ford Explorer
Steve ( N6EKV ) & Lori ( N6JTD ) Faries  w/ Marlee our precious pup.
Patterson CA.

Re: Auxillary oil pump on 6V92 ?

Reply #17 –
Remember from the Beamalarm site,a bottom line coach can be ordered with most options of a top of the line model.On the
pre lube systems search for "prelubers".
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Auxillary oil pump on 6V92 ?

Reply #18 –
A cooling off period after hard use will help prevent coking up of the turbo's bearing.  Had  several truck fleet owners install a mechanical egg timer type electric cutoff switch in the dash and set it to cut the still on ignition powers at 5-15 minutes while they went into a restaurant
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4