1809 Century Avenue, Grand Rapids, Michigan 49503-1530, U.S.A.
Telephone: (616) 241-1611 / Fax: (616) 241-3752
Parts List 501-H01
E-Mail: [email protected] / Internet: www.blackmer.com
Page 2 of 2
INSTALLATION AND MAINTENANCE
Hazardous
machinery can
cause serious
personal injury.
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
severe personal injury or death
Hazardous voltage.
Can shock, burn or
cause death.
Failure to disconnect and lockout
electrical power before attempting
maintenance can cause shock, burns or
death
Do not operate
without guard in
place
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
These units must only be installed in systems which
have been designed by those qualified to engineer
these systems. The system must be in accordance
with all applicable regulations and safety codes.
ASSEMBLY
Mount the pump and the motor base to the unit base. Mount
the motor on the motor base, but do not draw the motor
mounting nuts down tight.
Wipe the cone surface of the pump QD hub and the inside of
the pump sheave hub with a clean cloth moistened with a light
grade of machine oil. This will allow a more uniform draw and
prevent the cone surfaces from "freezing" before being
tightened.
With the shaft key in place, align the key seat and slide the QD
hub on the shaft, flange end first. Slide the large end of the
sheave bore over the taper on the QD hub. Insert the three (3)
sheave capscrews through the clearance holes in the sheave,
and start them into the tapped holes of the QD hub. Repeat
this procedure to assemble the motor QD hub and sheave.
To install the belts, shorten the center distance of the drive by
moving the motor towards the pump, until the belts can be put
on the sheaves without forcing.
Align the sheaves so that the faces are parallel, then snug up
the sheave capscrews.
Measure the span length as shown in Figure 1.
Figure 1
Adjust the motor base then apply a force at the center of the
belt span, so that the belt is deflected 1/64 inch for every inch
of span. For example, the deflection of a 20 inch span would
be 20/64 or 5/16 inch. The force required should be within the
range given in Table 1. A new set of belts should initially be
tensioned to the upper limit. Check again to see that the
sheaves are parallel and then tighten the sheave capscrews,
the motor mounting nuts and the adjusting screw locknut.
Assemble the belt guard and belt guard brace to the unit base.
DEFLECTION FORCE PER BELT
Small Sheave
Outside Diameter
Belt Deflection Force
Range
2.5 - 4.5" (63.5 - 114.3 mm)
3.0 – 4.75 Lb (1.4 - 2.2 Kg)
4.75 - 7" (120.7 - 177.8 mm)
4.0 – 6.0 Lb (1.8 -2.7 Kg)
Table 1
Check the belt tension after 24 - 48 hours run-in. Recheck the
tension periodically, and tighten the belts as required. Avoid
over-tightening belts, which can shorten bearing and belt life.
Belts should be inspected periodically for signs of excessive
wear and replaced if necessary.
For information on system installation and pump maintenance
refer to the Installation and Maintenance Instructions provided
with the pump.
DISASSEMBLY
Remove the belt guard and guard brace. Loosen the adjusting
screw locknut on the motor base and the motor mounting nuts.
Ease the tension on the belts by moving the motor towards the
pump to shorten the center distance of the drive. Remove the
belts by sliding them over the sheaves. Do not force the belts
over the grooves.
To remove the sheave from the hub, first remove the three
sheave capscrews, then screw two of them into the threaded
holes in the sheave hub. If the cone grip is hard to break loose,
tap the end of the shaft or the QD hub with a lead hammer,
while maintaining pressure on the screw.
The QD hub should slide smoothly off the shaft. If it is tight on
the shaft, pry it loose with a screwdriver or a small wedge
placed in the split part of the flange.