Kusojiji
RANK AMATEURS OF THE MODEL RAILROAD FORM MEMBER
I have wanted a Terrier but they have all been sold before I even got interested in the UK locos. I did find this on at Rails of Sheffield where they sell pre-owned models. After hemming and hawing about it, especially since it had an ancient coupler that would be difficult to replace with Kadees, I decided to take the plunge.
First order of business was to replace the couplers. The D type couplers screw on to the bottom of the chassis. I designed a retainer for the Kadees that would normally fit in a NEM pocket. These were very shallow, so I had to cut the legs off the Kadees. Used Goop to glue them in.
What I didn't know about this model is that it is very noisy. It buzzes badly at all speeds. I saw that the idler gear moved side to side and up and down, so I put in a nylon washer on the shaft. It was a little too thick, so I had to sand it down a bit. That didn't fix the noise.
I found that the motor vibrated quite a bit, so I decided to put a coreless motor in. I designed a motor mount, which had the tabs at the bottom that holds the idler gear in. I had to play with this a bit to get it to keep the gear from moving, but not restrict rotation.
Since I couldn't find a replacement worm gear as it has a strange modulus of 3.5 and Hornby no longer makes it, nor are their current offerings the same, I had to pull it off the old motor. It was stuck pretty hard and I ended up bending two pins and a drill bit, but finally got it off. It ended up being too sloppy on the coreless motor shaft, and consequently vibrated way too much, so I couldn't go that route. I ended up using a spare Hornby motor. So going back to the original motor mount, I added a shim to change the angle of the motor to engage the idler gear more.
This did help a bit, but I found that running around corners caused a lot of noise. So I took a close look at the chassis and gears to find out why. At full deflection of the rear wheels (has the gears), the main gear would rub on the idler and I could feel some vibration, so I used a 1500 grit sand paper and slowly took some material off. While there, I filed the chassis to clear some of the flashing.
While the thing was all apart, I added lamps to both ends and painted the cab.
First order of business was to replace the couplers. The D type couplers screw on to the bottom of the chassis. I designed a retainer for the Kadees that would normally fit in a NEM pocket. These were very shallow, so I had to cut the legs off the Kadees. Used Goop to glue them in.
What I didn't know about this model is that it is very noisy. It buzzes badly at all speeds. I saw that the idler gear moved side to side and up and down, so I put in a nylon washer on the shaft. It was a little too thick, so I had to sand it down a bit. That didn't fix the noise.
I found that the motor vibrated quite a bit, so I decided to put a coreless motor in. I designed a motor mount, which had the tabs at the bottom that holds the idler gear in. I had to play with this a bit to get it to keep the gear from moving, but not restrict rotation.
Since I couldn't find a replacement worm gear as it has a strange modulus of 3.5 and Hornby no longer makes it, nor are their current offerings the same, I had to pull it off the old motor. It was stuck pretty hard and I ended up bending two pins and a drill bit, but finally got it off. It ended up being too sloppy on the coreless motor shaft, and consequently vibrated way too much, so I couldn't go that route. I ended up using a spare Hornby motor. So going back to the original motor mount, I added a shim to change the angle of the motor to engage the idler gear more.
This did help a bit, but I found that running around corners caused a lot of noise. So I took a close look at the chassis and gears to find out why. At full deflection of the rear wheels (has the gears), the main gear would rub on the idler and I could feel some vibration, so I used a 1500 grit sand paper and slowly took some material off. While there, I filed the chassis to clear some of the flashing.
While the thing was all apart, I added lamps to both ends and painted the cab.
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