Specifications – Wood’s Powr-Grip MRTARC811LDC User Manual
Page 3
Rev 2.0/7-12
1
MRTA8-DC: #35076RC
SPECIFICATIONS
Description:
Designed for use with a crane or other hoisting equipment, MRTA8-DC lifters employ vacuum to
hold a load for lifting, and they provide manual 360° rotation and mechanically assisted, manual 90°
tilt movements for load manipulation.
Model Number:
MRTA8HV11DC
MRTA811LDC
Vacuum Pads:
10" [25 cm] nom. diameter,
lipped (Model HV11)
1
11" [28 cm] nom. diameter,
lipped (Model G3370)
(Eight, standard rubber, spring-mounted for ¼" [7 mm] travel, with #60 filter screen)
Pad Spread:
2
(to outer edges)
Length - Maximum:
122 1/4" [3105 mm]
123 1/4" [3130 mm]
- Minimum:
50" [1270 mm]
51" [1295 mm]
Width - Maximum:
73 1/2" [1867 mm]
74 1/2" [1892 mm]
- Minimum:
12 3/4" [327 mm]
13 3/4" [352 mm]
Lifter Weight:
294 lbs [134 kg]
290 lbs [132 kg]
Load Capacity
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces
3
)
Per-Pad:
150 lbs [68.5 kg]
175 lbs [79.5 kg]
Maximum:
1200 lbs [545 kg]
1400 lbs [635 kg]
Power Source:
12 volts DC, 26 amps
Battery Capacity:
26 amp-hours
Tilt Capability:
Manual, 90°, with four-bar tilt linkage that minimizes operator effort and automatically holds a
correctly attached load in the upright or flat position.
Rotation Capability:
Manual, 360°, with automatic latching (when desired)
Vacuum Pump:
2 diaphragm type, 1 SCFM [28 liters/minute] nominal airflow
or
1 diaphragm type, 3 SCFM [85 liters/minute] nominal airflow
Vacuum Reserve Tank:
Vacuum reservoir helps prevent immediate vacuum loss in case of power failure and extends battery
life by reducing pump cycles required to maintain vacuum.
Vacuum Gauge:
Dial gauge indicates current vacuum level in positive inches of Hg and negative kPa.
Vacuum Lift Light:
Green light is energized whenever vacuum level is sufficient for lifting maximum load weight (higher
than 16" Hg [-54 kPa]).
Options:
Available with Model LB8TLO - Tilt Lock. When engaged, this option ensures that the upright or flat
orientation of the load is not compromised by accidental or unexpected forces.
Available with Model EO8RC3 - Remote Control System. This option features a radio transmitter and
receiver that can activate apply and release functions at distances up to 250' [76 m]. The system
uses either a 310-320 or a 433-434 MHz signal, depending on requirements in your geographical
location. See separate instructions about other options.
Operating Elevation:
Maximum = 6000 feet [1828 meters]
Operating Temperatures: 32° to 104° F [0° to 40° C]
Service Life:
This lifter is designed to have a service life of at least 20,000 lifting cycles, when used and
maintained as intended. Vacuum pads, filter elements and other wear-out items are excluded; see
MAINTENANCE and REPLACEMENT PARTS LIST for more information. See appendix for instructions
about other options. For the D
ISPOSAL OF THE
L
IFTER
after its service life, see INTENDED USE.
ASME Standard BTH-1:
Design Category "B", Service Class "0" (see www.powrgrip.com for more information)
Wiring Diagram:
The following wiring diagram is attached for reference in servicing the lifter or trouble-shooting a
deficiency:
NPRD0035-W02 [C-W03]
!!-CE-!! Note: This symbol appears in the
INSTRUCTIONS
manual only when requirements of a CE Standard are
different
from requirements of other standards that
also apply to this vacuum lifter. CE requirements are mandatory in geographical areas where CE Standards apply, but may be optional in other locations.
1
Available with optional closed-cell foam rings for applications on rough or textured surfaces.
2
To identify the Pad Spread for any specific pad frame configuration, see the illustrations in ASSEMBLY: T
O
C
HANGE THE
P
AD
F
RAME
C
ONFIGURATION
.
3
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
: Friction Coefficient for
additional information.