MEP018 TM wiring/test inconsistency

[cranetruck]

Starting to work on my shorted stator winding problem, I'd like to point out that there is a problem with the suggested continuity test with what's shown in the diagrams.
The procedure according to TM 5-6115-275-35 wants you to test for continuity between pins 3 to 6, 8 to 12, 7 to 10, 1 to 4, 2 to 5, 11 to 13 (field flash) and 9 to 14.

The same procedure according to TM 5-6115-275-14; pins 10 to 7, 4 to 1, 6 to 9, 14 to 3, 8 to 5, 2 to 12 and 11 to 13 (field flash).

The drawings in the -14 TM agree with the test procedure in that manual.

The -14 version is not correct from the measurements I have made.

The images below are from the -14 TM and would not be correct, unless someone else can explain the differences...

 

[DieselBob]

Hello Bjorn. If it would help I could check the ohm readings on my set. I assume these measurements are taken at the Large connector on the cable that connects the control cube to the generator head.

 

[cranetruck]

Hello Bjorn. If it would help I could check the ohm readings on my set. I assume these measurements are taken at the Large connector on the cable that connects the control cube to the generator head.

Yes, thanks, it may be a helpful confirmation of my readings. On my set, the windings terminated on pins 2, 5, 8 and 12 are all shorted and should be two separate non-connected windings if I read the TMs right at all.
My previous posts on this subject are under the heading "MEP018 Field Flash question".

Looks like I need to take the generator head apart to see if the problem can be fixed easily or not.

 

[PeterD]

Any chance the leads out of the head are marked (would be 1-12 for the output leads)? The numbers are standardized (somewhat) and that may give you the 'clue' you need. The images you posted seemed to indicate that the manual writer was confused as to wire numbers and pin numbers, giving wire numbers when he meant to give pin numbers...

 

[DieselBob]

Bjorn, on my set pins 8 - 12 measure 0.2 ohms and pins 2 - 5 measure 0.3 ohms. measuring any other combination of these 4 pins read open. Sounds like you have a short in the to windings. I did take my readings at the plug that connects to the back of the control cube. Hope it helps.

 

[cranetruck]

Thanks Bob, much appreciated.

Again, I see the error in my ways of doing things (not looking at the details or overlooking the obvious), the pin numbers in Fig 8-7 refer to the J4 connector on the generator head NOT the connector at the control box end. It should be labeled J4 or P4 while the control box end should be labeled J1 or P1.

So, the test in the -35 TM relates to J1 (P1) while the test in -14 refers to J4 (P4).

Alright, if anybody is parting out a 10KW MEP018 genset, let me know, I'd be interested in the generator head as a back-up at the very least.

 

[DieselBob]

Yes it would make things easier if they just listed the plug / jack number when the call out pins.