As I succcessed repairing my ED70 loco, this time I've started doing a DD54. It's a powerful diesel loco with 2 pairs of inside gears plus vertical motors. But it does not seem to go ahead even then I slightly hear some electric noise when I turn the power pack on. I am planning to replace the motors into canned motors. I guess I have already gotten most parts for it but probably I need to get a pair of worm gears.
Tha parts in this pic is a pipe which has an iside diameter of 2.0 mms, an outside diameter of 2.4 mms. The shaft from a vertical motor seems to be an outside diameter of 2.4mms, so if I could use the worm gear at the shaft, the shaft from a canned motor is a slightly thin because it is an outside diameter of 2.0mms. That's why I need to put this pipe inbetween the worm gear and the shaft to fix it.
But the worm gear at the shaft is glued good at the shaft from the vertical motor, unable to take it out of it. So I need to get some pairs of worm gears but hey, then I really don't need to get ones which are 2.4mms outside diameter, right? I can get ones which are 2.0 mms outside diameter to set them to the 2.0 mms shaft from canned motors....? Echo model staffs say they don't have worm gears at all, so I guess probably I should ask the manufacturer of this DD54 Model Endo. I guess they would recommend MP gear system which makes a lot of $$$$$ to them lol.... :p
Echo model staff also say the worm gears need to be good fit with herical gears which are located next to the worm gears in the gear box, so usually they are sold in a pair. I made a phone call at Katsumi model at Meguro but they said someone in charge for it were just out of the shop, would call me back when he is back. Now I am waiting and waiting and waiting, crossing my fingers :)