| Author |
Message |
Robert H. (Ultimarv)
Registered Member
Username: Ultimarv
Post Number: 1
Registered: 2-2007
Posted From: 83.208.52.10
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 7:22 am: | |
Howdy, first post with a log-in after reading hundreds of thoughtfully archived topics here.
Question: What should we regularly check or service on our factory installed 1992 8V92TA Silver DDEC-II and HT-747 transmission?
Background
We recently purchased a 1992 Country Coach Concept 40', non-tag, with 63,000 miles and will use it to pull a 20'+60"-tongue flat-nose enclosed car hauler.
The engine was checked by Trans Diesel, Orland, FL, who asked to have it the night before for early cold starting. "Amazing, well running and clean" was there feedback. Oil in engine and trans "very good". All hoses etc in high-grade silicon and "should not wear out".
We have read the concerns on overheating, the mileage aspects and the the few posts on the HT-747.
For perspective on our experience, we have also learned that "TA" stand for turbo and aftercooler.
Look forward to any advice on upkeep and frequency or concerns.
Best regards,
Robert |
Muddog16 (Muddog16)
Registered Member
Username: Muddog16
Post Number: 327
Registered: 11-2004
Posted From: 4.224.204.81
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 7:35 am: | |
Robert, go to ebay and type in detroit diesel, there will be tons of stuff there, you will find CD's for your 8V92TA, I bought a set for my 92TA, I paid 30 bucks or less it has been awhile since I bought them so don't hold me to that! There is a complete section in there about tips for maintenance and even some schedules! Good luck and welcome to the board and bussing!
Pat
http://prevostlemirage.blogspot.com/ |
Robert H. (Ultimarv)
Registered Member
Username: Ultimarv
Post Number: 2
Registered: 2-2007
Posted From: 83.208.52.10
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 8:20 am: | |
Pat, found the US Army manual, paper copy, for the 8V92TA Detroit Diesel. Should be an interesting read, if I remember the manuals from my Army days.
Also, what a rebuild project you are involved in and nice work. Thanks for your post.
Robert |
Mark Renner (Boomer)
Registered Member
Username: Boomer
Post Number: 40
Registered: 11-2006
Posted From: 12.180.53.193
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 1:54 pm: | |
Hi Robert--
Some tips from a former commercial operator:
1. Do not run multi weight oil; use a good
brand of HD 40 weight. Change at 10-12K mi.
2. DO NOT idle the engine unless necessary.
3. Do not operate over 200 deg. coolant temp.
4. Keep your coolant condition per book specs
by adding the correct type and amount of
additive. You can purchase a test kit from
your DDA dealer as well as the additive.
5. Make sure your application has the correct
size and type air filter and intake pipes.
8V92's require a LOT of air. Installing a
service indicator in the air piping is a
good idea to monitor the restriction.
6. Very important--make sure the rod and main
bearings are checked or replaced every
100,000 miles and at that time inspect the
rear main web for cracks. 92's are a lot
harder on the lower end than 71's.
7. Check exhaust manifold stud nuts for
tightness once in a while.
8. Don't lug it!
9. Transmission is pretty bullit proof. Change
oil and filter at mfg. recommended intervals,
inspect output yoke/flange for tightness or
excessive wear, inspect hoses for leaks or
excessive hardness.
10. Highly recommend oil analysis, both units, on
a scheduled basis. Cheap insurance.
Hope this helps some. |
Robert H. (Ultimarv)
Registered Member
Username: Ultimarv
Post Number: 3
Registered: 2-2007
Posted From: 83.208.52.10
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 2:34 pm: | |
Many thanks Mark. A good ten-point list that we will print-out until it becomes second nature. I will ask Trans Diesel about a service indicator for the air piping. We really love this diesel, both in sound and just because it's a bit different than the norm. Some owners we have spoken to said their only desire was a 5-speed.
Robert |
evan (Legaleagle82)
Registered Member
Username: Legaleagle82
Post Number: 4
Registered: 12-2006
Posted From: 69.245.4.209
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 4:39 pm: | |
Would the rod and main bearing check at 100K also apply to the 8v71, as thats what I have and learning as I go also. |
Mark Renner (Boomer)
Registered Member
Username: Boomer
Post Number: 41
Registered: 11-2006
Posted From: 12.180.53.193
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 17, 2007 - 5:10 pm: | |
Not in my opinion. In my experience, the lower end on an 8V71 will last long after some other componant causes you an overhaul (unless of course the oil system becomes contaminated). The crank and bearings on the V71 series seem to be rock solid if not abused, even on the turbo'd engines. |