AnsaldoSTS 95 - Idler Gear Assembly; Main Shaft and Segment Gear

General Maintenance and Troubleshooting
3-8 SM 6495, Rev. 7, December 2008
5. Remove five (5) bolts from (bottom to top) the gear drive on the side of the pinion gear. When
replacing the gearmotor use Loctite 242 (Blue) on the mounting screws, tighten to a torque of 110-
140 in-lb.
6. Install the gearmotor output shaft gear. Align with the mating idler gear and tighten the gearmotor
set screws to 40-45 in-lb. Assure that set screws are seated in recessed area of motor output shaft.
Use Loctite 242 (Blue) on both set screws.
7. Lubricate pinion gear with a light coat of lubricant.
3.2.7. Idler Gear Assembly
To remove the idler gear assembly (see Figure 5-1, Figure 5-3, or Figure 5-7, Items 50 and 55), follow
these steps.
1. Remove the left-idler shaft-snap ring and the right bearing retaining ring.
2. Drive the shaft from the left side. The small idler gear will force the right bearing out the right
side. Allow the small idler gear to pass through the right side wall.
3. Hold the large idler gear in place while removing the shaft and small idler gear.
4. Remove the key.
To replace the Idler Gear Assembly, perform the removal procedures in reverse order. After replacing
idler gear assembly, ensure the idler gear assembly and the segment gear turn freely. Lubricate gear
teeth with a light grease. Sealed bearings should be replaced when replacing the idler gear assembly.
3.2.8. Main Shaft and Segment Gear
WARNING
To avoid bodily injury, use care when inserting hold down pin
[M46706901 in Model 95 Tool Kit (N46707001)] into gear.
To remove the main shaft (see Figure 5-1, Figure 5-3, or Figure 5-7), follow these steps.
1. Remove circuit controller cams.
2. Remove left snap ring. (Refer to
Figure 5-2, Figure 5-4, or Figure 5-8, Item 70.)
3. Remove the segment gear set screw. (Refer to Figure 5-1, Figure 5-3, or Figure 5-7, Item 160.)
4. Drive main shaft from right side forcing left bearing out the left side. Hold segment gear. Ensure
main shaft is allowed to slide freely through segment gear. Keep segment gear key in place.