Page 5 of 6 (Section 2 of 2)
50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
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e
Installation & Maintenance Instructions
Form No.V8714-Sec. 2
HYDRAMOTORr PUSH-TYPE LINEAR ACTUATOR
AH2D
SERIES
(Section 2 of 2)
WITH WATERTIGHT ENCLOSURE
NOTICE: For instructions, see Form No. V8714-Section 1.
Damper Shaft Arm and Spring Replacement
(Refer to Figure 7)
1. Disconnect damper shaft arm from existing system
linkage.
2. Remove retaining ring from end of damper shaft.
3. Slip damper shaft arm, spring plug and return spring (if
present) off damper shaft.
4. Reassembly in reverse order of disassembly paying careful
attention to exploded view in Figure 7.
5. Reconnect existing system linkage to damper shaft arm.
6. Operate actuator (complete system) through five cycles to
verify proper operation.
Note: Damper shaft arm replacement kits are supplied with or
without return spring and spring plug. See Field Service Notice
in Section 1 page 3 of 6.
Partial View
Retaining ring
Spring plug
Return spring
Damper shaft arm
Figure 7. Damper Shaft Arm & Return Spring.
Refilling Hydramotorr Actuator with Hydraulic Oil
and Purging Entrapped Air
1. When refilling a Hydramotorr Actuator with oil, it is
recommended that the actuator be energized and
de-energized during filling (if possible). This is
particularly important if the oil level in the reservoir is
very low or empty. By operating the actuator, entrapped
air ĂĂis ĂpurgedĂĂ fromĂ ĂtheĂĂ hydraulicĂ Ăsystem. ĂĂĂIf Ăupon
energizing the Hydramotorr Actuator the actuator fails
to move, delays or operates slowly, chances are air has
become entrapped in the hydraulic system.
Remove entrapped air from the hydraulic system by
cycling the actuator 4 to 5 times successively over the full
stroke. As air is purged, check oil level and add oil if
necessary. All of the air has been removed when the
actuator stem moves immediately upon energizing.
2. With Actuator Mounted Upright, (Figure 2), remove oil fill
plug and fill to bottom of fill port, follow instructions
provided in step 1.
3. With Actuator Mounted On Its Side, and oil fill plug
uppermost, remove the oil fill plug. The oil level should
be 5/8I from the top of the pump cover. Follow
instructions provided in step 1.
4. Reinstall fill plug and torque to 114 to 120 in-lbs 13 to 14
Nm].
5. If actuator has been repositioned, return unit to normal
orientation.
6. Operate actuator (complete system) through five cycles to
verify proper operation.
Continued on page 6 of 6.
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