Flowserve L120-85 Actuator - Manual (Page 23)

L120-85 actuators are always available for motor operation when
the motor is energized. Do not force the Declutch Lever into the
motor operation position. The Declutch Lever returns to motor
operation position automatically when the motor is energized.
NOTE: Refer to the Illustrated Parts Breakdown in Section 10.1 as
you step through the Description of Operation and the Assembly/
Disassembly procedures.
5.1 Description
of Motor Operation
In motor operation, the Motor Cam (piece 38) drives the Clutch
Assembly (piece 19-1, 2, and 3) which is splined on the outer
diameter and mates with the internal splines of the Clutch Pinion
Assembly (piece 18-1, 2 and 3). The helical gear teeth on the Clutch
Pinion (piece 18-1) mate with the Wormshaft Gear (piece 35) teeth.
The Clutch Pinion and Wormshaft Gear are always engaged. The
Wormshaft Gear is keyed to the Wormshaft (piece 15-1) which is
keyed to the Worm (piece 15-2). Rotation of the Wormshaft/ Worm
Assembly turns the Worm Gear (piece 21). Lugs on the Worm Gear
engage lugs on the outer diameter of the Drive Sleeve (piece 25).
Hammerblow or no lost motion is selected by the assembly arrange-
ment of the Worm Gear and Drive Sleeve Lugs. Lugs at the base
of the Drive Sleeve can drive either a Torque Drive Nut (similar to
L120-10 through 40) or they can drive the lugs of the Thrust Stem
Nut contained in the type Drive 2 Thrust Base Assembly.
5.2 Description
of Manual Operation
c WARNING: Do not manually operate actuator with devices
other than installed Handwheel and Declutch lever. Using
additive force devices (cheater bars, wheel wrenches,
pipe wrenches or other devices of this nature) on the
actuator Handwheel or Declutch Lever may cause serious
personal injury and/or damage to the actuator or valve.
The L120-85 actuator has a Handwheel (piece 29) for manual
operation. The unit can be manually operated any time the Motor is
not energized. To manually operate the L120- 85, push the Declutch
Lever (piece 9) in the direction of the arrow until it latches in place.
Pushing the Declutch Lever rotates the Declutch Shaft which is
5
Operation
2
Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-00 – 11/05
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