Tach Reader Tape

Yes there are brushes inside the can motor, but they are not really replaceable.  You replace the whole motor.  The commutator can wear too, or the winding insulation becomes damaged.  Motors run $25 each.

Depends on your tape.  Is it a painted flywheel, or paper tape?  If it works I would leave it alone.  There are replacement tapes if necessary and if the motor is replaced you get a new flywheel with it.   G

Its the paper tape, the cab side motor is plain the other motor has the tape type on it.

Here is what i see on motor.

RS385 PH

and under that

R then non legible letter i think(something but cannot make it out) and immediately followed by numbers 502318

I emailed Midge at MTH prior to post here asking information for replacement motors with same information of numbers as above.

Awaiting her reply as automated reply says -

I will be out of the office starting at 12:00 noon today, 3/6.  I will return back to the office on Tuesday, March 11th.   I will be reviewing email messages, telephone calls and responding to them as quickly as I can.

GGG

I appreciate you helping and 25.00 each for new replacement motors 1 hopefully with tack tape sounds very reasonable and hard to pass up.

Let me see what she has to say out of respect since i emailed her prior and will post back soon as i know something.

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I don't believe replacement motors come with tach tape, but while you're ordering a motor, you can order a replacement tach tape; shouldn't affect shipping cost.

I have these can motors in a pair of old Weaver locos from early 90's that I upgraded to PS2, and they run fine.  Only motor I've ever had fail was when a flywheel kicked loose.

Many of the motors already have the tach stripes on them, the last two that I got did.  If not, you can print the tach tapes, I posted an image in the technical documents thread.

Those numbers are standard for the size of the can motor, but are not specific enough for ordering.  To get the MTH part number which is specific for your model you need to provide Midge the engine model 20-2383-1.  In this case an AC6000 which I believe is similar to the SD-50, 70.

I would be interested in what Midge tells you.  I think BE-0000189 and BE-0000190 are the correct motors, but they are out of stock and they will provide you and alternate part number.  The 189 is without tach, and the 190 is with tach.

Each engine has a specific flywheel size and also worm gear size.  Some models are similar enough that a motor will fit several models.  The 385 is a larger motor in the Premier Line, and the 365 is shorter and in the RK line for diesels.   G

If the tach motor is ordered for a PS-2 locomotive it will come with a striped flywheel.  G

GGG, I just got one, the BE-0000076, it has a striped flywheel.

Midge emailed me on March 26th saying this is what they have available for my 

AC6000 20-2383-1 

BE-0000177 - (RS-385PH) (8.0x22.5mm worm gear) (15.0mm threads) (5.0x27.0mm black flywheel) - The cost for this part is $25.00 each (for one)

        BE-0000178 - RS-385PH) (8.0x22.5mm worm gear) (13.5mm threads) (5.0x27.0mm black & white striped flywheel) (w/ tach bracket) - The cost for this part is $25.00 each (for one).

Called the following day and left message on her answering machine.

She called me back and the order was placed along with 4 spare tires as well.

Thanks for the help and replies.

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Thanks for the follow up.  Glad they had them.  I have 2 of the same I am expecting any day.  They also work for an E-8 if you decide to get another MTH engine! G

GGG

the E-8 i seen online and they are beautiful.

Perhaps Santa Claus will bring a surprise next Christmas.

When the motors arrive im going to make sure they

fit mesh properly then tuck them away and enjoy the engine knowing i have a spare set of motors.

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I received mine Friday, I had ordered a bunch of different motors.  They are actually 7.8X22.5x14mm and both motors have the same gear size.

Sometimes there are inaccuracies in MTH measurements, which is also why there are a number of parts that have different numbers despite being the same.

Make sure you check that the rotation is straight (nothing got bent in shipping) and that the tach reader bracket isn't broken.  G 

In checking that the rotation is straight on the motors do you mean spin the motors flywheel by hand to see if the motor shaft spins true or is there another that you

check it.

Tach reader bracket i will check as suggested also.

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I just grab the worm and give it a spin and see if anything wobbles out of place.  I haven't had it on new motors yet, but I've seen it on old ones out of units.

You can also connect a DC power supply at 5-6 volts to it and see how it looks running.

Just rotate the motor by hand.  I had 2 broken tach reader holders and 1 bent flywheel.  Not sure if it was shipping damage or just bad handling somewhere in the manufacturing chain.  G

Ok thanks i will check them when they arrive.

Appreciate the help given in this thread.

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