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Step 14: 

Remove worm gear cover from the rear drive wheel assembly.  Remove the 
worm gear, and replace it with the new worm gear.  Replace the worm gear 
cover and screw it back in place.  (See Figure 11) 

Step 15: 

Install the new gear box to the rear drive wheel assembly, and reattach the 
rear drive assembly to the front drive assembly.  (See Figure 10) 

Step 16: 

Replace the worm gear in the front drive wheel assembly with the new 
worm gear, reattaching the worm gear cover.  (See Figure 9) 

Step 17: 

Reattach the drive wheel assemblies to the frame, carefully threading the 
pickup wires through the frame.  Once they are fitted back together screw 
in the four screws from the top, and the one screw from the bottom.  (See 
Figure 8) 

Step 18: 

Reinstall the motor and drive shaft in the bottom frame, and then place the 
top weight on top of the frame.  Screw the top weight in place.  (See Figure 
7) 

Step 19: 

Realign the wiring into channels of the weight and tape the wires into place 
using electrical tape. 

Step 20: 

Replace the boiler body and cab onto the top of the weight, carefully 
aligning the printed circuit board into the slot in front of the weight.  Many 
details will need to be carefully moved around the boiler while it is being 
positioned into place.  Care should be taken not to break these items.  (See 
Figure 6) 

 

Summary of Contents for AC-12

Page 1: ...arts Tools required Small flat blade screw driver Small Phillips head screw driver Locomotive cradle holder Scotch Tape optional The gear box replacement is a multi part procedure that will require co...

Page 2: ...e 1 Step 3 Loosen the grab irons from cab doors on each side of the locomotive cab Loosen the connecting grab iron from the back of the cab below the window See Figure 2 Step 4 Loosen the detail pipin...

Page 3: ...Lift the weight out of the way being careful not to pull or jerk on the wiring See Figure 7 Step 10 Lift the motor out of the frame removing the drive shaft from the gear box end and setting the motor...

Page 4: ...fully threading the pickup wires through the frame Once they are fitted back together screw in the four screws from the top and the one screw from the bottom See Figure 8 Step 18 Reinstall the motor a...

Page 5: ...from the locomotive boiler Details will need to be reattached on each side See Figure 3 Step 24 Reattach the grab irons to the cab doors along witggh the connecting grab irons on the back of the cab...

Page 6: ...Page 6 of 16 FIGURE 1...

Page 7: ...Page 7 of 16 Figure 2...

Page 8: ...Page 8 of 16 Figure 3...

Page 9: ...Page 9 of 16 Figure 4...

Page 10: ...Page 10 of 16 Figure 5...

Page 11: ...Page 11 of 16 Figure 6...

Page 12: ...Page 12 of 16 Figure 7...

Page 13: ...Page 13 of 16 Figure 8...

Page 14: ...Page 14 of 16 Figure 9...

Page 15: ...Page 15 of 16 Figure 10...

Page 16: ...Page 16 of 16 Figure 11...

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