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  1. majoday

    Fixing up my MEP-803A"

    02.13.5 Fuel Pump Shim Packs Extreme care must be taken to ensure that the individual shim packs that are fitted between each fuel pump plate and the crankcase are retained with their original respective cylinder. The colour coded shims are available in three sizes: Green ........ 0.075mm...
  2. majoday

    Fixing up my MEP-803A"

    Hello Ray. I reflected on the sound of the motor. It seemed as if the timing was retarded (Working on motors as a self-trained mechanic since I was @ 15, now 75). So, I removed the injector pumps, one at a time, removed the shims and replaced the I/J's with 2 Black shims and 1 Green for each...
  3. majoday

    Fixing up my MEP-803A"

    The internals of the IJP's may really be quite good and the cosmetics poor. I will put a high-pressure gauge on the IPJ's this week to check pressure levels.
  4. majoday

    Fixing up my MEP-803A"

    I did not know that. Looking at the overall condition of the set, the IJP's look the worse for weathering rust. The best one, in appearance was #4. The rest had significant rust and pitting on the lower part. However, all looked good when disassembled and cleaned.
  5. majoday

    Fixing up my MEP-803A"

    The unit went to the Red River Army Depot. Someone purchased it for a few hundred $. I bought it for $750. The seller said they made it start, but it would not run. I found this site. I dismantled the fuel tank and found watery diesel and a quarter inch of red sludge. The filters were also...
  6. majoday

    Fixing up my MEP-803A"

    Thanks, I reviewed a previous post you shared and this even makes the point more clear. I used the cardboard as you suggested, It worked. # 4 had an injector pump or IJ problem and really cooled down and white smoke came out. I shut it down and restarted it. That cleared the problem. # 4 has 7...
  7. majoday

    Fixing up my MEP-803A"

    Well, today I started the MEP-803A. It ran rough but smoothed out a little. I have new injectors. Where on the exhaust do most folks measure heat? I had higher temps on #4 and lower temps on #1 and #2 If I measured on the robust part below the manifold the range was #1 188 (192 w/ cardboard) ...
  8. majoday

    Fixing up my MEP-803A"

    I noticed that there are 2 types of injector pumps. I suppose the distance from the base to the spring cap is the same. #4 injector has several shims (7). I have pondered your 2 shim method since I read about as many a 4 a norm. Just pondering. I have to load it to really test the performance of...
  9. majoday

    MEP-803 locking up, help?

    There well may be much about the unit that is good. You will weigh the cost/benefit ratio from a logistics perspective. It may well be negative. However, there is also a cost/benefit ratio in a satisfactory plan to bring the unit "on-line" for your household plan. Making something work can be...
  10. majoday

    MEP-802/803 fuel return improvements

    I changed out mine for one used on the Mercedes Automobile. Fit perfectly.
  11. majoday

    Fixing up my MEP-803A"

    Installed the new Electroswitch. Checked out the wiring to be sure of an accurate attachment to the switch. Learned positions of TBs , Jacks, Relays busu with fence building. Project on hold. Spent most of the day on a scheduled CAP (Civil Air Patrol) mission; Mission Chaplain, Mission Scanner.
  12. majoday

    MEP-802A and MEP-803A Wire diagrams

    This is very interesting. I have been looking at the schematic and the wiring diagram on my MEP-803A (built in 2000, 78 hrs on the Hobbs, bought for $750.00 from a local guy) to understand the set. My first AF job was in radio repair, 66-70. So, I've dusted off the memories and looked at the...
  13. majoday

    Fixing up my MEP-803A"

    Well, it nhas been a while, a long while, since I read a schematic. So..., I have had to brush up on my skill and dust off the recesses of my memory bank (AF Ground Radio Repairman 30354, 66-77). Thank you all for the support in getting the unit going. I am now awaiting the switch.
  14. majoday

    MEP-802A/803A S1 Master Switch Source - Electroswitch

    Will Do. Thank you!
  15. majoday

    MEP-802A/803A S1 Master Switch Source - Electroswitch

    Thank you! I was pondering that. I really wish to do this w/o any error. I really appreciate the info!
  16. majoday

    MEP-802A/803A S1 Master Switch Source - Electroswitch

    Thank you. I studied the literature and the schematic and concluded that must be so, but your real-life experience sealed it! I appreciate your willingness to share something even so simple and obvious.
  17. majoday

    MEP-802A/803A S1 Master Switch Source - Electroswitch

    I have a 75902LV in the mail. I understand that the numbers correspond with the K & N Blue switch. I am going to use the diode #1 to #7. I am curious about the jumper that was on the K & N. Did you have to use it? I have not used schematics in a looooong time, but am busy re-learning.
  18. majoday

    Fixing up my MEP-803A"

    I see. I ran the schematic for CR$. 1 & 7 . It looks like 2,4,6,&8 are ganged. How simple is clarity. I will review this. My new switch is on the way.
  19. majoday

    Fixing up my MEP-803A"

    Well, I either did an "old man, 75" thing or a "rookie" one; the jumper on the K/N fell out because I failed to identify it and tighten a screw. Wat pins does it tie together, or is it needed on the Electroswitch model? Thanks.
  20. majoday

    Fixing up my MEP-803A"

    Thanks!!
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