Flowserve L120-190 through L120-2000 - Manual (Page 38)

Limitorque ® L120-190 through L120-2000 FCD LMENIM1203-00 – 10/11
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8.2 L120-2000
c WARNING: See sections 5.1 and 5.2 Safety Precautions and Safety Practices.
NOTE: The L120-2000 Drive 2 is a thrust-type actuator consisting of an L120-2000 Drive 1 torque-type
actuator mounted on a thrust bearing assembly. For torque-only actuators see Section 8.2.2, Drive 1
Disassembly (Torque Housing).
NOTE: Piece numbers refer to Figures 8.7 - 8.10.
8.2.1 Drive 2 Disassembly (Thrust Housing Only)
c WARNING: Before proceeding, ensure that the actuator is not under load and that the valve is
not under pressure. If so, the valve must be in fully open position.
Remove Drive Sleeve Locknut (piece #130):
1. Rotate handwheel to close valve, causing the Stem Nut (piece #127) to rise up threaded valve stem
until the stem nut splines are free of Drive Sleeve (piece #126).
2. Rotate stem nut by hand for the remaining length of the valve stem and remove.
Remove Thrust Adapter (piece #125):
NOTE: If disassembly of thrust adapter assembly is not required, continue to Section 8.2.2, Drive 1
(Torque Actuator), Step No. 1.
1. Remove Seal Retainer Plate (piece #129) and Oil Seal (piece #54-6).
2. Loosen setscrew and remove Thrust Bearing Cartridge (piece #128) from the Thrust Adapter
Housing (piece #125).
3. Remove Upper Bearing Roller Assembly (piece #131).
4. Lift Thrust Drive Sleeve (piece #126) out of Thrust Adapter Housing (piece #125).
5. Remove Lower Bearing Roller Assembly (piece #131).
8.2.2 Drive 1 Disassembly (Torque Housing)
1. Remove Limit Switch Compartment (piece #200-1).
2. Disconnect motor leads, Torque Switch (piece #301) leads, and Geared Limit Switch (piece #305)
leads.
NOTE: Ensure leads are labeled for reassembly.
3. Remove screws holding Limit Switch and holding Torque Switch. Remove both items.
4. Remove bolts holding Motor.
5. Remove Motor Adapter (piece #22) and Motor Adapter Gasket (piece #105). Remove motor gear
shims from the motor adapter bearing bores and store in a safe place.
6. Remove Intermediate Pinion (piece #32-1) and the Drive Shaft Gear (piece #32-2).
7. Remove torque switch and geared limit switch.