Flowserve PT Series Limitorque - Manual (Page 34)

Limitorque PT Series Worm Gear Operator FCD LMENIM2001-00 – 01/10
34
4.9 Spur Gear Attachments - PT60
Refer to Figure 4.15, 4.16, 4.17 and Table 4.7
1. Remove the Motor Flange (pc# 14)
2. Remove the Spur Cover (pc# 20) and Spur Cover Seal (pc# 16) from the Spur Housing (pc#19)
note: The cover has a Locating Pin (pc# 23). Use a prying device such as a screwdriver along the edge to free the Spur
Housing Cover from the Spur Housing.
3. Remove the Input Shaft (pc# 4) with O-Rings (pc# 1)
4. Remove Spur Gear (pc# 10) and Spur Gear Key (pc# 11)
5. Remove the Spur Housing (pc# 19) and Spur Housing Gaskets (pc# 18)
6. If disassembly of the PT is required, please see section 4.4
Reassembly Instructions:
1. Install all Spur Housing Gaskets (pc# 18) and Spur Housing (pc# 19) with two bolts opposite each other in order to
hold the assembly in place against the PT Housing.
Caution: The Spur Housing Gaskets between the Spur Housing and the PT Housing act as shims to set the bearing
preload for the tapered roller bearings on the Worm Shaft/Bearing Assembly (pc# 3). The Assembly should
have minimum play up and down and end to end. It should also rotate easily.
2. Remove one gasket at a time until the shaft pinches and will not rotate. Add back one gasket to obtain the
correct fit.
3. Lightly lubricate the keyed end of the Worm Shaft/Bearing Assembly, (pc# 3) and install the Spur Gear Key
(pc# 11)
4. Install the Spur Gear (pc# 10) into the Spur Housing (pc# 19), avoiding pushing it to the bottom of the housing.
5. Lubricate the journal bore for the Input Shaft (pc# 4)
6. Lubricate the Input Shaft and slide it into the journal bore in the Spur Cover (pc# 20). Be sure that the O-Rings
(pc# 1) and Input Shaft Washers (pc# 7 & 8) are in place.
7. Ensure that the Spur Cover Locating Pins (pc# 23) in the Spur Cover (pc# 20) are flush with the mating surface of
the Spur Cover.
8. Relubricate the Spur Housing (pc# 19) but do not fill completely.
9. Run a bead of silicone sealant around the mating surface of the Spur Housing and Spur Cover.
10. Apply the small end journal washer to the Input Shaft (pc# 4).
11. Install the Spur Cover (pc# 20) with Locating Pins (pc# 23), Spur Cover Gasket (pc# 33), and Input Shaft onto the
Spur Housing and aim the small journal of the Input Shaft for the mating bore in the Spur Housing.
12. With the Spur Cover in place and properly seated, drive in the Spur Cover Locating Pins (pc# 23) and install the
Cover bolts.
13. Lightly lubricate the bore of the Motor Flange (pc# 14) and bolt the Flange in place.
14. Check the rotation of the Worm Gear through at least one half of the travel of the Gear.
note: Replace any worn or damaged O-Rings or Gaskets to ensure proper sealing.