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Transmission Oil Pressure | Allison's on 8V92TAs
1996 8V92TA's with Allison's in a Hatteras 52' CPMY. First time out for a legit sea trial. Ran out of fuel on main tank, after switching to another tank and getting her going again I had high transmission oil pressure (see photo, 220+) readings on Port motor (which had stalled). GPH was also 3-4 for low idle setting (limping back to the dock as fuel gauges are questionable). Temp remained inline/consistent with Starboard. Voltage was also reading low. I checked oil on drives which were totally clear and a good reading on the sticks. Replaced the o ring on the port dipstick as it had no suction. When not under load at the dock I could not repeat the issue. Any thoughts on what could be wrong, places to start?
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
Victory52
Voltage was also reading low.
You mentioned low volts on a DDEC system. Fix or verify that first.
If you did a lot of cranking on that engine to get it running after running out of fuel, batteries must be low or a new DVc bad connection.
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Low voltage or bad ground can really mess with electronic readouts.
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
Captain Ralph
You mentioned low volts on a DDEC system. Fix or verify that first.If you did a lot of cranking on that engine to get it running after running out of fuel, batteries must be low or a new DVc bad connection.
I was thinking it could be low voltage creating havoc with readouts. What is a DVc?
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
SKYCHENEY
Low voltage or bad ground can really mess with electronic readouts.
Hi Sky, I'm just South of you in Muskegon. Will verify voltage. I was getting 11.9v on return leg.
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
Victory52
What is a DVc?
Sorry, I meant DCv.
Direct Current volts. Battery voltage.
When you get old, some brain cells get lost or sacrificed or since I don't know how to type;
Some things just jet posted incorrectly.
DDEC needs good-clean, full charge and lots of battery voltage.
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
Victory52
Hi Sky, I'm just South of you in Muskegon. Will verify voltage. I was getting 11.9v on return leg.
There may be a Vanner voltage converter somewhere there. I had one on a motorhome that wasn't putting out proper voltage and it caused problems with my DDEC 8v92.
Re: Transmission Oil Pressure | Allison's on 8V92TAs
Quote:
Originally Posted by
SKYCHENEY
There may be a Vanner voltage converter somewhere there. I had one on a motorhome that wasn't putting out proper voltage and it caused problems with my DDEC 8v92.
I may also have drew the batteries down too much cranking over to get it fired back up. Didn't consider a voltage converter though, will inspect.
