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mpe803a

kloppk

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Pepperell, Massachusetts
You indicated that the fuel pump runs with S1 in Prime/Run so S10 is not the issue.

Do this with Dead Crank in NORMAL, Emergency Off Button Pulled Out and Battle Short OFF
Open the panel and with a flashlight watch K16 as you move S1 from OFF to Prime/Run. When you move S1 to that position do you see the K16 relay pull in?

K16 is the only relay that should pull in with S1 in Prime/Run and not running.
 

mchlsprgn

Member
143
14
18
Location
jamul cal
You indicated that the fuel pump runs with S1 in Prime/Run so S10 is not the issue.

Do this with Dead Crank in NORMAL, Emergency Off Button Pulled Out and Battle Short OFF
Open the panel and with a flashlight watch K16 as you move S1 from OFF to Prime/Run. When you move S1 to that position do you see the K16 relay pull in?

K16 is the only relay that should pull in with S1 in Prime/Run and not running.
k16 does nothing
 

kloppk

Well-known member
Steel Soldiers Supporter
2,145
3,526
113
Location
Pepperell, Massachusetts
We're getting closer.
K16 has to pull in for the starter circuit to be enabled. Since it's not pulling the starter isn't going to work.

Does K12 pull in with S1 in Prime/Run?
 

kloppk

Well-known member
Steel Soldiers Supporter
2,145
3,526
113
Location
Pepperell, Massachusetts
OK, need to determine why K16 isn't pulling in when it should.
Here is the numbering of the terminals on the individual relay sockets. It shows K16 but it's the same for all of the sockets.
Terminals 4,5 & 6 are closest to the front panel on the lower row of the socket.
Terminals 7,8,9 are farthest from the front panel on the lower row of the socket.
Relay Terminals.JPG

With S1 in Prime/Run measure the DC voltage at K16-A and K16-B.
Both of those terminals are just behind the relay. Hopefully you have the top off of the control cube to see what you are doing.
K16-A should be ~24 volts DC and K16-B should be ~0-1 volts DC.
 

mchlsprgn

Member
143
14
18
Location
jamul cal
OK, need to determine why K16 isn't pulling in when it should.
Here is the numbering of the terminals on the individual relay sockets. It shows K16 but it's the same for all of the sockets.
Terminals 4,5 & 6 are closest to the front panel on the lower row of the socket.
Terminals 7,8,9 are farthest from the front panel on the lower row of the socket.
View attachment 820562

With S1 in Prime/Run measure the DC voltage at K16-A and K16-B.
Both of those terminals are just behind the relay. Hopefully you have the top off of the control cube to see what you are doing.
K16-A should be ~24 volts DC and K16-B should be ~0-1 volts DC.
taking the top off now
 

mchlsprgn

Member
143
14
18
Location
jamul cal
OK, need to determine why K16 isn't pulling in when it should.
Here is the numbering of the terminals on the individual relay sockets. It shows K16 but it's the same for all of the sockets.
Terminals 4,5 & 6 are closest to the front panel on the lower row of the socket.
Terminals 7,8,9 are farthest from the front panel on the lower row of the socket.
View attachment 820562

With S1 in Prime/Run measure the DC voltage at K16-A and K16-B.
Both of those terminals are just behind the relay. Hopefully you have the top off of the control cube to see what you are doing.
K16-A should be ~24 volts DC and K16-B should be ~0-1 volts DC.
got the top off no volts at at a or b
 
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