1977 M20J with 1057-00-5G Actuator issue

[PT20J]

47 minutes ago, Echo said:

If it were you and you wanted to test what wire would you connect to positive and negative?

I would look at the schematic to see how it the field and armature leads are connected through the relays and connect it like that.

[MikeOH]

4 hours ago, Echo said:

OK I will look at what four wires do unless they are as stated for separate field and armature connections which I don’t understand. If it were you and you wanted to test what wire would you connect to positive and negative?

I took a look at the schematic for an E (S/N: 700035 and greater).

The RED wire is always connected to positive (+ Battery) and is connected to the FIELD winding on the motor.  The BLACK wire is the other side of the FIELD winding and is connected through two RELAYS that control the direction of the current through the ARMATURE which is the GREEN and YELLOW wires.  That is, the field is connected in SERIES with the ARMATURE where the current is ALWAYS in the same direction through the FIELD (RED/BLACK) but the current through the ARMATURE (GREEN/YELLOW) wires is dependent upon the relay positions.  In effect, the relays control whether the GREEN or YELLOW ARMATURE wire is connected to ground, while the other ARMATURE wire is connected to the BLACK FIELD wire.

To 'bench test' I would connect the POSITIVE battery terminal to the RED wire, connect the BLACK wire to the GREEN wire, and connect the YELLOW wire to the NEGATIVE terminal of the battery and note the direction of rotation of the motor.  Then REVERSE the YELLOW and GREEN wires (i.e. connect the YELLOW wire to the BLACK wire, and the GREEN wire to NEGATIVE battery terminal) and the motor should rotate in the opposite direction.

That's the best I can do for you.

[PT20J]

I'd only run it for a few seconds If you test it without a load. Series wound motors are designed to provide high torque to start a heavy load. Unloaded they can accelerate uncontrollably to very high and perhaps damaging rpms.

[Echo]

1 hour ago, MikeOH said:

I took a look at the schematic for an E (S/N: 700035 and greater).

The RED wire is always connected to positive (+ Battery) and is connected to the FIELD winding on the motor.  The BLACK wire is the other side of the FIELD winding and is connected through two RELAYS that control the direction of the current through the ARMATURE which is the GREEN and YELLOW wires.  That is, the field is connected in SERIES with the ARMATURE where the current is ALWAYS in the same direction through the FIELD (RED/BLACK) but the current through the ARMATURE (GREEN/YELLOW) wires is dependent upon the relay positions.  In effect, the relays control whether the GREEN or YELLOW ARMATURE wire is connected to ground, while the other ARMATURE wire is connected to the BLACK FIELD wire.

To 'bench test' I would connect the POSITIVE battery terminal to the RED wire, connect the BLACK wire to the GREEN wire, and connect the YELLOW wire to the NEGATIVE terminal of the battery and note the direction of rotation of the motor.  Then REVERSE the YELLOW and GREEN wires (i.e. connect the YELLOW wire to the BLACK wire, and the GREEN wire to NEGATIVE battery terminal) and the motor should rotate in the opposite direction.

That's the best I can do for you.

That's awesome.  Thank you much!  Scott

[MikeOH]

11 minutes ago, Echo said:

That's awesome.  Thank you much!  Scott

You're welcome.

Take heed to what @PT20J said; just run it for a second or two in each direction to verify the motor runs. Series wound motors need a load!

[Echo]

3 hours ago, MikeOH said:

You're welcome.

Take heed to what @PT20J said; just run it for a second or two in each direction to verify the motor runs. Series wound motors need a load!

Roger.  Thanks everybody.

[Aaviationist]

This resurgence of this thread is full of emotional instability and doing things one shouldn’t be because of a fundamental misunderstanding of a basic motor. 
 

if you read this in a quiet room you can ALMOST hear the physical abuse that happens in that household. 
 

A+ read. 
Seek help. 

Edited 20 hours ago by Aaviationist