10
E.
ALIGNMENT
The pump and driver, if supplied, were not aligned at the factory since the unit can
shift during shipment. Couplings are disconnected for shipment and belts
untensioned. The pump and driver shafts must be checked for angular and parallel
alignment. (Realignment is also necessary after the grout has hardened and anchor
bolts have been tightened.) The alignment must be finally checked after the piping
has been completed and rechecked periodically. In accurate alignment results in
vibration and excessive wear on bearings, shaft sleeves or mechanical seals.
WARNING
WHEN CHECKING ALIGNMENT OR PERFORMING ANY WORK ON THE UNITS,
ELECTRICAL SERVICE MUST BE LOCKED OUT WITH AN APPROVED
LOCKOUT AND KEY. FAILURE TO LOCKOUT EQUIPMENT MAY RESULT IN
INJURY.
The model suffix A (i.e., ROA) has been designed to be driven through a flexible
coupling and the model suffix B pump has been designed for belt drives. The
bearing system in each model is designed to optimize bearing life with their
respective type drive. Warranty will not be extended to any problems or damage
due to misapplication.
If necessary, the bearing system can be converted to suit the drive system selected.
See Disassembly/Assembly manual.
Flexible Coupling Drive (Model Suffix A)
Flexible couplings are not intended to permit permanent misalignment. Even slight
misalignment will reduce bearing life and cause other problems. Flexible couplings
do permit some temporary slight change in alignment or end play to allow for
unusual momentary loads or thermal expansion during start-up.
The coupling should be installed and aligned according to the manufacturer’s
recommendations. The dimensions and tolerances listed below apply only to the
couplings furnished by Roto-Jet Pump.
Motor to Gear Box Coupling Make: Falk Type: T20, Size: 1070 T
Gear Box Shaft: Refer to gear manufacturer’s information, Motor Shaft: Refer
to NEMA Motor Size.
Gap between coupling faces: Minimum 1/16”, Normal 1/8”, Maximum 3/16”
Concentricity between faces: .004” total indicator reading .002” max. center-
line displacement
Face parallelism: .002” max. gap variation at edge of coupling
