This past week I completed some customizing on the Grizzly Northern's newest and fourth Russian Dec and started running-in at the club on Saturday. However after about an hour of smooth running at medium speed the loco stalled and refused to respond, although the DH123 decoder proved to be good. Testing without a decoder, with a shorting plug installed and using 00 address there was no typical sizzle to be heard.
In subsequent testing with a multimeter I found an open circuit at the loco connector terminals connecting to the motor, as compared to about 30 ohms for an operable Russian. Therefore it looks as if the motor has burnt out or gone open circuit.
My problem at the monment is how to gain access to the motor. Referring to the loco diagram I have removed screw 00219 securing the front bottom frame to the cylinder saddle, screw 10109 securing the rear bottom frame to the central split block holding the motor and screw 10181 holding the draw bar, which also appears to run through to central split block. However I still haven't found the secret to releasing the cab and boiler from the bottom frame, in the same way as for a 2-8-0. What am I missing?
Isambard
Grizzly Northern history, Tales from the Grizzly and news on line at isambard5935.blogspot.com
Look inside the smoke stack for a screw.
Jim