| Author |
Message |
Bill Gerrie (Bill_gerrie)
Registered Member
Username: Bill_gerrie
Post Number: 36
Registered: 3-2006
Posted From: 72.136.170.153
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 9:22 am: | |
Does anyone know what size of restrictor would be used in the oil line feeding the large oil cooled altenator on a 6V92TA. It is gear driven and the oil pressure is low due to the oil dumping into it with out a restrictor fitting. Oil pressure was fine till I changed to a rebuilt altenator which gets its oil sent to both the rear diode section and a small line to the front bearing. My other altenator had oil only to the diode section. With the oil pressure sender connected to this line it shows low oil pressure now. Any help would be appreciated. Bill |
Dale Waller (Happycampersrus)
Registered Member
Username: Happycampersrus
Post Number: 238
Registered: 7-2005
Posted From: 68.65.122.187
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 10:05 am: | |
Hey Bill,
I think that I have a bulletin that calls for a 0.080 orfice, But I am not 100%.
I will look through the books and see.
Maybe someone will know right off the top of their head.
Dale |
John MC9 (John_mc9)
Registered Member
Username: John_mc9
Post Number: 76
Registered: 7-2006
Posted From: 66.217.106.104
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 1:36 pm: | |
DD Tech help is here:
www.detroitdiesel.com
Bulletins, etc, here:
http://www.detroitdiesel.com/public/sp/spnav.asp
It'll take time to dig through it..... The alternators weren't
made by DD, were they? If not.... hmmm... dunno...
Say.... why not give Luke a call? |
Geoff (Geoff)
Registered Member
Username: Geoff
Post Number: 897
Registered: 12-2002
Posted From: 71.211.116.93
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 8:03 pm: | |
It is not unusual to have the oil sending unit and oil feed lines coming from the same port in the block. You will have a 5psi or so drop in oil pressure reading when the port is shared, but this should not create problems. You could always move the pressure sender line to another oil port on the block-- they are all on the same horizontal plane on the side of the block. |
Bill Gerrie (Bill_gerrie)
Registered Member
Username: Bill_gerrie
Post Number: 37
Registered: 3-2006
Posted From: 72.136.170.153
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 9:34 pm: | |
Thanks guys. The oil pressure reading is only 20lbs at the gauge in the altenator line and 58lbs at the DDEC oil pressure sender. My oil pressure gauge is acurate so that isn't the problem. I was told by a DD mechanic that there should be a restrictor fitting as far as he knows but didn't know the size of it. He says what is happening is the oil is being dumped into the altenator so the gauge is reading a low pressure on this line. Thanks for the DD links. Bill |
Sammy (Sammy)
Registered Member
Username: Sammy
Post Number: 57
Registered: 8-2005
Posted From: 68.237.213.178
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 9:41 pm: | |
Bill I have new ones at work.
I'll get info for you tomorrow - part #, etc. |
Bill Gerrie (Bill_gerrie)
Registered Member
Username: Bill_gerrie
Post Number: 38
Registered: 3-2006
Posted From: 72.136.170.153
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 30, 2006 - 10:49 pm: | |
Thanks Sammy |
Sammy (Sammy)
Registered Member
Username: Sammy
Post Number: 58
Registered: 8-2005
Posted From: 68.237.213.178
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, August 31, 2006 - 3:32 pm: | |
Bill, here's the part numbers for it:
Delco #: 1987256
MCI #: 7G-3-37
The restriction on this fitting is only for the line that feeds oil to the front bearing.
Hope this helps. |
Bob Wies (Ncbob)
Registered Member
Username: Ncbob
Post Number: 183
Registered: 2-2006
Posted From: 71.125.106.52
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, August 31, 2006 - 6:39 pm: | |
While we're talking about oil, pressures, restricted fittings, etc....this might me a good time to challenge the experts.
I'm installing a 24V Preluber on my 8V71 and my best guess is that if I feed from a point about 1 1/2" above the floor of the oil pan, through a by-pass type oil filter and a check valve..should I feed the pressurized oil to the oil cooler or to the block where the oil pressure sender resides?
I realize that I'll get virtually an instant reading of oil pressure that way but if I time
the pumps' "on" time would I get enough flow to lift the crank in about 30 seconds?
And would I be back flushing the engine oil pump?
NCbob |
Bill Gerrie (Bill_gerrie)
Registered Member
Username: Bill_gerrie
Post Number: 40
Registered: 3-2006
Posted From: 72.136.170.153
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, August 31, 2006 - 10:27 pm: | |
Sammy
Thanks. I will order one from MCI.
Bob
If you read the DD links from John MC9 there is a section on prelube connections. It is taken from the pan and fed into the fitting on the filter. Bill |