New to the MEP-802a

[kiddra]

I am new to the MEP-802a world. I just purchased a unit from iron planet. I hope to pick it up in the next couple of days. This unit looks complete but it was not tested due to no batteries. It has 35 hours on the counter but I'm not sure if this is accurate. I plan to conduct all of the regular maintenance prior to attempting to start i.e. oil, coolant, new batteries, and checking fuel system out. I have seen all kind of helpful posts here on repairs. Is there anything else I should check prior to starting? I may try to soak rings with oil prior to cranking engine. Would I add oil through the injector openings by pulling the injectors? I will also conduct the excite circuit mod and MOV mod if already not accomplished. Thank for any input you could provide.

 

[fa35jsf]

Do everything you stated except the soaking the rings with oil. Just use the dead crank switch to spin the engine for 15 seconds before your first start. That will get the oil moving enough. If you pull injectors you will need to find new copper washers that seal the injectors in. Also, this thing is a pain to work on the engine because of the enclosure.


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[kloppk]

...and MOV mod if already not accomplished.

It certainly won't have the MOV mod. That's a mod that I came up with a few years ago.
PM me your mailing address and I'll mail you a MOV to install. No charge.
Kurt

 

[rcamacho]

Highly suggest changing out the fuel tank well plugs with brass/viton assemblies. The stock wellnuts will fail if not failed already.

Check ultimate wellnut thread...

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[fa35jsf]

Higlu suggest changing out the fuel tank well plugs with brass/viton assemblies.

Check ultimate wellnut thread...


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Second!


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[kiddra]

Thanks. I really wasn't wanting to pull the injectors anyway. Using the dead crank switch makes sense.

 

[kiddra]

I'll check out the wellnut thread also. Probably go ahead and do that while I'm going through everything else.

 

[kiddra]

So I pick up my MEP-802a yesterday. Got it home and changed oil filter and added oil, added coolant, and today I will be cleaning out the fuel system and filters. I also picked up two batteries and wired them in. Went to check for any signs of life on the control panel and all I got was some dim light out of the panel lights and gauges moved a little when I cycled through the positions on the start switch. No other signs of life. I haven't had a lot of time to look at it yet. I did verify 24 volts at the fuse behind the control panel and 24 volts at the emergency shut down switch. Anyone have any idea where I should start? I have downloaded the trouble shooting guides and will start working my way through that.

 

[kloppk]

Remember don't start it until you at least have the fuse mod installed.

Does it turn over using the Dead Crank switch?
Do you have ~+24 at S1 terminals 2,4,6&8 when S1 is in the PRIME/RUN position?
Do you get ~+24 at S1 terminal 3 when S1 is in the PRIME/RUN position?

 

[Daybreak]

Howdy,

Start here in this thread [FONT=Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif]MEP-802A MEP-803A Filters and Parts[/FONT]

In the 2nd post, go to the quicky video for starting. Are you set for normal run?

Always stop and let prime for a ling time, especially if you changed all the filters.

When starting, do not let go to quickly, let the oil pressure rise, then let go.

 

[kiddra]

I'll be doing the fuse mod soon. It does not turn over with the dead crank switch? I'll check the voltage at S1 terminals next.

 

[kiddra]

As of right now the fuel pumps are not getting power either.

 

[kloppk]

...It does not turn over with the dead crank switch?..

It's possible CR1 is bad. Here is how to test for it.
1) Connect your meters negative lead to ground. There is a ground stud on the back wall of the cube to the lower right of the Voltage regulator.
2) Connect your meters positive to the right end of CR1. Check for ~24 volts DC there. CR1 is mounted on the parts panel on the back left of the control cube.
3) Move the Dead Crank to the Crank position and again check for ~24 volts DC at the right end of CR1.
4) Move Dead Crank to OFF.
5) Move your positive meter lead to the left end of CR1. Check for ~24 volts DC there.
6) Move the Dead Crank to the Crank position and again check for ~24 volts DC at the left end of CR1.
7) Move Dead Crank to OFF.

Do you get ~24 volts DC at steps 2,3,5 & 6?
If not, what do you get for voltage readings at each step.

 

[98G]

Bar it over by hand once before using the starter.

I dont think the starter would bend a rod if hydrolocked, but your hand certainly won't.

 

[kiddra]

So an update. I turn motor over before attempting to start everything seems normal. I 'm attempting to clean out a brown material coating the walls of the fuel tank prior to putting in new gas. The old fuel filters were in pretty good shape but replaced. I was able to turn the motor over with the dead crank switch my mechanically agitating the cranking relay. I took voltages at S1 terminals 2,4,6&8 and have 24 volts in OFF and 5 volts in PRIME/RUN I also have 5 volt on terminal 3 when in PRIME/RUN.

 

[kiddra]

So CR1 is sticking. I have to tap it to get it to crank using dead crank. Still nothing from the main switch. When I go to Prime/ Run the fuel pump does not come on. I have verified both pumps by putting 24 volts to the positive of pump. Where should I look next.

 

[kloppk]

So CR1 is sticking..

??
CR1 is a diode. It has no moving parts.
I assume your may have meant K2?

Please report back on the measurements suggested in post 13.

 

[fa35jsf]

It’s simple. Put fuel in the tank!

I had the same problem recently where I thought I had a big problem because it wouldn’t crank and the pumps wouldn’t come on. Turns out the fuel tank was completely empty and it must have some sort of safety feature.


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[kiddra]

Sorry about the confusion. Yes I meant K2 is sticking. So I conducted measurements from post 13 on the CL1 diode and got 0 volts on all measurements.

 

[kiddra]

I'm in the process of updating the well plugs. I saw in the wiring diagram the low fuel safety feature so I used rags to put the floats at the full position but that did not effect the fuel pumps. Still nothing in PRIME/RUN