Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200
Telephone: 414-342-3131 Fax: 414-937-4359 www.rexnord.com
178-810
July 2015
Falk V-Class
TM
• Bucket Elevator Inching Drive • Installation, Operation & Maintenance Manual
Type VR Series • Sizes M107 thru M227
(Page 4 of 12)
Oil Level, Ultramite UB
Ultramite UB drive sizes 03-07 are only furnished
from the factory with oil as determined by the drive
mounting position. Verify that the oil has been filled
to the correct level before operating the drive.
Ultramite UB drive sizes 08 and larger are NOT
furnished with oil. Add oil per manual 288-400. The
oil level and oil fill location are shown below. Install
air vent plug in place of a standard plug before
operating drive.
Figure 9 – Ultramite UB oil locations
OPERATION
The clutch housing and the V-Class reducer are
shipped dry. Prior to operation, make sure the shared
sumps are filled with oil as outlined in the installation
section.
Nameplate
— Operate Falk™ gear drives only at
horsepower, speed and ratio shown on nameplate.
Before changing any of these, submit complete
nameplate data and new application conditions to the
Factory for correct oil level, parts, and application
approval.
Bucket elevator inching drives are used for inspection
or maintenance purposes. The inching drive consists
of an Ultramite UB right angle bevel drive. These
drives are designed to be used for both loaded, non-
continuous inching operation, and unloaded
(maintenance) inching operation with the V-Class
output shaft rotating between 1.8 and 4.0 rpm.
An inching drive connected with an overrunning
clutch requires no physical effort to go from main
drive operation to inching operation. The clutch
automatically disengages the inching drive when the
main motor is operating. It is highly recommended
to use a speed sensor and speed switch as a safety
device to shut down the main motor in the event of a
back driven event. This will prevent back driving the
inching drive and motor at high speeds and the risk of
damage and injury.
The speed switch (PRS1 or IFMR) should be set to
cut out when the speed of the Ultramite output shaft
exceeds the normal inching speed of the Ultramite
output shaft, which is typically less than 60 rpm.
Instructions to set the two speed switches are outlined
below.
To set the proper overspeed cutout using a PRS1
speed switch, operate the inching drive. Turn the set
point adjustment screw on the PRS1 speed switch
(Figure 2) until the LED relay-on indicator goes off.
Then turn the adjustment screw the opposite direction
½
turn. Reset the relay and make sure the inching
drive speed does not trip the switch.
The PRS1 speed switch supplied from Rexnord can
either detect speed ranges of 6-60 rpm or 60- 600
rpm. For Ultramite output shafts rotating at normal
inching speeds just slightly below 60 rpm, the 60-600
rpm speed switch should be selected to make sure
that the overspeed condition is detected. However,
the above procedure may not be able to be used to set
the overspeed cutout. Instead, the lowest speed
setting on the 60-600 rpm switch should be used.
The IFMR speed switch has an operating frequency
range from 0 Hz to 25 kHz. A summary of the IFMR
speed switch configuration is shown in Figure 10.
The steps outlined in figures 11 through 16 can be
used to set the proper overspeed cutout with an IFMR
speed switch.
