INSTRUCTION AND SERVICE PARTS MANUAL - FREEZER CS 800, s/n F0176-00 - ALFRED & CO
N1
11. MAINTENANCE
11.1. ROTARY PUMPS MAINTENANCE
ROLLER BEARING ADJUSTMENT
Test for loose shaft roller bearings by gripping the rotor shafts firmly and
attempting to move in various directions while the pump is disassembled. If
the bearing show looseness by a "chucking" sound or there is a feel of
movement, tighten by the following procedure:
• Remove the lock screw in each of the bearing adjustment nuts.
• Using a spanner wrench, tighten one bearing adjustment nut at a time.
• Rotate the rotor shafts back and forth 180° during adjustment.
• Tighten one adjustment nut until a slight reisistance to shaft rotation is
felt. Mark its position and back the adjustment nut off one-half turn.
• Tighten the other adjustment nut the same way, but leave it in its
tightened position (do not back off).
• Replace lock screw and secure.
• Move the first adjustment nut back to its mark. Replace lock screw and
secure
Excessive shaft looseness requires bearing replacement.
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