Search results

Are you Steve K.?

About 1.5" of snow here and still coming down. Deer foraging for food behind our house this morning

FYI - 114250-66440 is Yanmar's part number for the bolt and is not the NSN number for it. The actual NSN number is: 5306-01-431-7459 Info about MEP part numbers and NSN numbers can be looked up at Parttarget.com That bolt is a Yanmar unique M6 bolt with a hole in the head for the locking wire...

The AC output is pretty clean on a MEP. Here are a few oscilloscope waveforms for comparison. Ideal 60 Hz power waveform Typical utility power waveform (at my house) MEP-802A power waveform at 50% Load

Which model alternator do you have? 8EM3005CA or 8MR3005CA? Per the TM... 8EM3005CA 101-206 ..SEMICONDUCTOR DEVIC 1 0142499T36 ..SEMICONDUCTOR DEVIC 1 8MR3005CA 101-193 ..DIODE,NEGATIVE 1 101-235 ..DIODE,POSITIVE 1 101-130 ..DIODE,TRIO 1 From a Prestolite parts matrix 8MR3005CA alternator

I see you only have 111 hours on it (if it's accurate) 1) Have you checked fuse FU1 to be sure it's good? 2) Have you verified that the Exciter terminal on the alternator is getting 24 volts when S1 in in Prime/Run? Failures I've seen in the alternators are: - Failure of diode(s) on the diode...

The diagram I posted is a cleaned up version that @DieselAddict created and I augmented with more into. Only the bottom contacts in S5 change position when S5 is lifted and only the top contacts change position when S5 in pushed down.

S5 OPENS the contactor by breaking the connection between S5-2 and S5-3 when S5 is pushed down. 24 volts is supplied to K1-X when the generator is running. Once the contactor is closed the switch in the bottom of K1 below is closed (K1 11 to 12.) K1-11 remains grounded by the path of K1-11 to...

I've repair a few of the MEP Fault Indicator panels. Mostly 831 panels but a couple of 80x panels. The usual fault is one of the many SCR's on the board has failed. Usually shorting out causing a constant false fault.

Cable info from the -24 TM for cables from Contact to the lugs

Switch The cheapest I could find just now for it was about $40 ----> Switch

For test running it you could use a pair of basic SPDT switches. I posted up a while back a substitute switch for the OEM one. It required it to be wired slightly differently.

You are welcome to one of the take outs I have. Probably about $5 shipping.

Maybe they changed design at some point? The engine parts TM shows a "stick" Here are the ones I removed from an 831 I parted out recently

I'll defer to Guyfang and others on this one. If it were an electrical question, I'd be all over it.

To quote @Guyfang "The TM's for this gen set are not released to the unwashed masses. Its coded B and we can not post them here in the forum. "

Merry Christmas Everyone!

I was looking at a different revision of the TM. Sorry for the confusion. 122-3054 is the Libby VR 19870 is the TRC VR To determine it on your own you'd need to open the -24P TM and find the VR part numbers and the corresponding NSN number. Then go to the website Parttarget.com and put the...

See TM 9-6115-643-24 see section 4.1 The AC Voltage Regulation system is comprised of: - AC Voltage Regulator - Transformer T1 - Resistor R16 - Front Panel Voltage Adjust potentiometer Those 4 parts are unique and different for a TRC vs Libby system. Since you have TRC VR you would use 4-1.2...

Yes, essentially a direct replacement. Hook the wires back up to the same terminal numbers on the replacement VR. Install the provided pre-wired potentiometer in the front panel. Hook up two labeled wires behind the gauge panel. Done. As Guy posted above, the factory VRs fail frequently...