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Type 1078
Installation
The Type 1078 manual actuator is normally shipped
mounted on a power actuator. If the manual actuator
has been shipped separately for installation on a pow-
er actuator, or if the manual actuator was removed for
maintenance, mount the manual actuator by following
the instructions presented in this section.
Individual part key numbers and part descriptions ref-
erenced in this procedure are shown in figure 2.
Converting An Existing Power Actuator
For Use With The Type 1078 Manual
Actuator
Field conversion of a power actuator for use with the
Type 1078 manual actuator may require replacement
and/or removal of some parts. The procedures which
follow apply only to power actuators which were not
ordered specifically for use with the Type 1078 manual
actuator. Proceed as appropriate:
For manual actuator installation on a Type 1051 or
1052 size 33 power actuator with F or G mounting
adaptation without wrench-operated extension, a
new lever with stub shaft must be installed in place of
the standard lever. The standard power actuator travel
indicator components are omitted. Refer to the power
actuator instruction manual.
For manual actuator installation on a Type 1051 or
1052 size 33 power actuator with F or G mounting
adaptation with wrench-operated extension, the
manual actuator will mount directly to the power actua-
tor after the power actuator travel indicator compo-
nents have been removed from the power actuator.
For manual actuator installation on a Type 1051 or
1052 size 33 power actuator with H or J mounting
adaptation, dual stub shaft construction is required. If
the power actuator is a single stub shaft construction,
the lever must be removed and a second stub shaft
installed. The standard power actuator travel indicator
components are omitted. Refer to the power actuator
instruction manual. If the power actuator has dual stub
shaft construction (wrench-operated extension), the
manual actuator will mount directly to the power actua-
tor after the power actuator travel indicator compo-
nents have been removed from the power actuator.
For manual actuator installation on Type 1061
sizes 30, 40, 60, 68, 80, and 100; Type 1051 sizes
40 and 60; Type 1052 sizes 40, 60, and 70; Type
321 sizes 60 and 80; and Type 354 sizes 60 and 80
remove the actuator cover (key 34) and attached parts
from Type 1061, 1051, 1052, 321, or 354. Replace
with Type 1078. Most assemblies require installation
8
of a new lever and splined adaptor to complete the
installation. When used, the splined adaptor slides in-
side the new lever and the lever is then clamped onto
the splined adaptor. See figure 6.
CAUTION
The travel indicator scale supplied with
the Type 1066 and 1066SR power actua-
tor is thicker than the scale supplied
with the Type 1078 manual actuator. Be-
cause the scale serves as a pressure
containing and component positioning
part, it is imperative that the thicker
scale originally mounted on the Type
1066 and 1066SR be returned to its orig-
inal position before mounting the Type
1078 manual actuator. Failure to use the
thicker plate may result in damage to
internal components and unreliable per-
formance of the power actuator.
For manual actuator installation on a Type 1066 or
1066SR power actuator with F or G mounting
adaptation, a hub assembly with shaft extension must
be installed in place of the standard hub assembly.
Make certain that the travel indicator scale originally
supplied with the Type 1066 and 1066SR power ac-
tuator is installed on the power actuator before mount-
ing the Type 1078 manual actuator. The Type 1066
and 1066SR travel indicator scale is thicker than the
scale shipped with the Type 1078 manual actuator and
is used as a pressure retaining and component posi-
tioning part. The travel indicator pointer and its mount-
ing parts are not used. Refer to the power actuator
instruction manual.
For manual actuator installation on a Type 1066 or
1066SR power actuator with H mounting adapta-
tion, the manual actuator will mount directly to the
power actuator after the travel indicator pointer, travel
indicator pointer retaining ring, and the travel indicator
scale retaining ring have been removed from the
manual actuator side of the power actuator. Make cer-
tain that the travel indicator scale originally supplied
with the Type 1066 and 1066SR power actuator is
installed between the manual and power actuator.
Type 1066 and 1066SR travel indicator scale is thicker
than the scale shipped with the Type 1078 manual
actuator and is used as a pressure retaining and com-
ponent positioning part. The travel indicator pointer,
the travel indicator pointer retaining ring, and the travel
indicator scale retaining ring (quantity of 1) originally
installed on the manual actuator side of the power ac-
tuator are not used.
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