MEP-803A Alternator and Pulley

[CaryHenry]

Hi Folks -
I just picked up an MEP-803a, but it doesn't have an alternator (or pulley, of course). I've been able to find multiple sources for the alternators, but haven't had any luck on the pulley. I've searched the forum, and the sources I've found via search seem to be out of stock with no timeframe of when they'll get any more in. Does anyone have any sources they could share? I'm also up for retrofitting other 24V alternators if that is a possibility.

 

[Light in the Dark]

I may have one, I need to look.

 

[Guyfang]

Another good way to find a part is to open a "Parts Wanted" Thread. LITD would have seen that too!

 

[Light in the Dark]

Unfortunately it seems the one I thought I had I no longer do. Only pulleys that seem to be in stock at the moment are crank pulleys with the reverse rotation bolts.

I even checked my rebuilt alternators boxed on the shelf, thinking I maybe sent it out... Nada. I will keep looking, and if I find a source, share it here.

 

[Guyfang]

I can give you tech data on the pulley, but it aint gonna help you, I think.

 

[CaryHenry]

Thanks folks. I'll keep looking. Looks like I may have to get creative and retrofit an alternative 24V alternator into the unit.

 

[CaryHenry]

any reason this alternator wouldn't work? It's a highly available unit that has serpentine pulleys readily available. I know the vehicle guys use these on the M998 and M35 units. It's a single wire alternator, so should be easy to incorporate into the charging system. Is there anything special about the generator wiring to where this wouldn't be compatible? I know I may need to do some fabrication on the mounts, and may need a different sized belt. Anything I'm missing?

Amazon.com

 

[FarmingSmallKubota]

i believe thats about double the amperage output of the leece-Neville

 

[CaryHenry]

i believe thats about double the amperage output of the leece-Neville

But would that be an issue?

 

[Farmitall]

But would that be an issue?

It shouldn't be an issue as long as the output voltage is the same.

A larger current capability means that the alternator will just not work as hard.

The needed charge current will be determined by the charge state of the batteries. An alternator doesn't "push" current to a battery, the battery "draws" current as needed.

People put high output alternators in place of stock OEM alternators in vehicles all the time for greater current needs, such as high powered amplifiers, lighting, etc.

 

[CaryHenry]

Thanks. That was my understanding as well. It's a 24V unit, and the increased current rating should make it easier to find a pulley to work as I won't have to be as specific on alternator speed to get enough charge.

I'll go ahead and order this alternator to see if I can get it to line up with the serpentine belt. Should have some tolerance for adjustment as well as they offer 8 rib serpentine belt pulleys. I'll report back to let everyone know how it went.

 

[CaryHenry]

I can give you tech data on the pulley, but it aint gonna help you, I think.

If you have that info, it would be helpful for me to find a pulley diameter close to stock so I can get the speed range close.

 

[Light in the Dark]

Full dimensional details are here: https://www.wbparts.com/rfq/3020-01-382-8782.html

 

[CaryHenry]

Full dimensional details are here: https://www.wbparts.com/rfq/3020-01-382-8782.html

Awesome! Thank you. I ordered this pulley. 2.37in diameter with 8 grooves (more flexibility for belt alignment) and a 0.875" diameter to match the 21SI alternator. Keeping my fingers crossed...

8 Groove Diesel Truck Alternator Serpentine Belt Pulley 2.37"O.D .875" I.D. | eBay

TYPE Pulley. PULLEY CLASS S8. BELT WIDTH 28. Mack Truck 2132X10463072. SAVE UP TO 5%. White V1114260, V1114261. Western Star 802013403, 802013404. SHAFT DIA 22.23.

www.ebay.com

 

[Kalistinikov]

There's a master catalogue for Lister Petter engines (whats in the MEP 802A and 803A). They do list an alternator and pulley, but of two different sizes. The one closer in size, I found it here https://www.oldtimerengines.com.au/genuine-lister-petter-lpw-alternator-pully-61-5mm-751-10965

Never heard of this company, but for $20, might be worth a shot

 

[Light in the Dark]

There's a master catalogue for Lister Petter engines (whats in the MEP 802A and 803A). They do list an alternator and pulley, but of two different sizes. The one closer in size, I found it here https://www.oldtimerengines.com.au/genuine-lister-petter-lpw-alternator-pully-61-5mm-751-10965

Never heard of this company, but for $20, might be worth a shot

I don't see a keyway on the ID of that pulley, and the Leece Neville unit is keyed. FWIW

 

[Kalistinikov]

I don't see a keyway on the ID of that pulley, and the Leece Neville unit is keyed. FWIW

Good observation. I don't see one in the parts illustrations either. They do list their own 24V alternator though

 

[FarmingSmallKubota]

There's a master catalogue for Lister Petter engines (whats in the MEP 802A and 803A). They do list an alternator and pulley, but of two different sizes. The one closer in size, I found it here https://www.oldtimerengines.com.au/genuine-lister-petter-lpw-alternator-pully-61-5mm-751-10965

Never heard of this company, but for $20, might be worth a shot

Might want to email them first as they are in Australia

 

[Guyfang]

Tech data.

	OUTSIDE DIAMETER	2 231/500 INCHES NOMINAL
	OVERALL LENGTH	1 INCHES NOMINAL
	KEYWAY WIDTH	0 127/1000 INCHES NOMINAL
	BORE DIAMETER	0 157/250 INCHES NOMINAL
	BORE LENGTH	0 18/25 INCHES NOMINAL
	DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY	0 193/500 INCHES NOMINAL
	III END ITEM IDENTIFICATION	6115-01-274-7387
	V GROOVE ANGLE IN DEG	40
	MATERIAL AND LOCATION	STEEL, AISI 1010 OVERALL AND STEEL, AISI 1020 OVERALL
	FACE WIDTH	0 829/1000 INCHES NOMINAL
	DESIGN FORM	WEBBED
	BORE TYPE	STRAIGHT
	BEARINGS	NOT INCLUDED
	GROOVE QUANTITY	4
	COUNTERBORE FEATURE	NOT INCLUDED
	KEYING FACILITY	INCLUDED
	KEYING FACILITY TYPE	KEYWAY
	SPLIT HUB FEATURE	NOT INCLUDED
	WEB/SPOKE RELATIONSHIP TO FACE CENTERLINE	NOT OFFSET
	LIGHTENING HOLE	NOT INCLUDED
	INTEGRAL COOLING VANE	NOT INCLUDED
	GROOVE SHAPE	V
	STANDARD V-BELT SECTION DESIGNATION FOR WHICH DESIGNED	4K
	BORE FEATURE	INCLUDED
	SHAFT SIZE FOR WHICH DESIGNED	0 157/250 INCHES NOMINAL
	PROTRUDING HUB CHARACTERISTIC	PLAIN
	HUB END OUTSIDE DIAMETER AND LOCATION	1 INCHES NOMINAL BB END
	DISTANCE FROM OUTSIDE FLANGE/RIM TO HUB END AND LOCATION	0 7/25 INCHES MINIMUM AA END AND 171/1000 INCHES MAXIMUM BB END
	QUANTITY	1
	SURFACE TREATMENT	NICKEL
	STYLE DESIGNATOR	WEBBED OR SPOKED

 

[CaryHenry]

Ok, got the alternator on and bolted up.

Needed a slightly longer belt. Got a 4040365, but a 4040360 would've been better. 1/2" bottom bolt with grade 8 washers for spacing. 8 groove HD truck pulley. Everything seems to like up.

Now it's time to connect the wiring. I have four wires that look like they were connected to the old alternator. Any way to trace what goes where? Battery, exciter, ground and ?