Service manual

6
D.5 MOUNTING OF FOOT MOUNTED PUMPS AND DRIVERS
Some pumps are shipped on baseplates without drivers. For these units, install and
tighten each coupling half on driver and pump shafts. Place driver on baseplate and set
proper distance between shafts and coupling hubs (See Figure 2). Locate driver so pump
and driver shafts are in axial alignment. See Section D.6 on Alignment.
Coupling Installation
Gap Length
Figure 2 – Coupling Gap Measurement
For pumps driven through a separate gearbox or other device, first align device relative to
pump, and then align driver relative to device.
See Section D.6.5 for belt-driven pumps. On horizontal pump/driver assemblies, shaft couplings
are often shipped disassembled to prevent coupling damage during shipping and handling.
When not supplied by the manufacturer, coupling, shaft and/or belt guards conforming to ANSI
B15.1 should be installed for personnel protection during pump operation.
Final alignment of pump and driver should take place after unit is secured to foundation. If
baseplate is to be grouted, this should be completed before final alignment.
NOTE: Grouting is recommended to prevent lateral shifting of baseplate, not to take up
irregularities in the foundation. For installations requiring grouting, a baseplate
designed specifically for this purpose is needed.
WARNING
Install guards over couplings and shafts to protect personnel from accidental
contact with rotating couplings, belts, sheaves, chains, shafts and/or keyways.
D.6 ALIGNMENT
D.6.1 General
All pump and driver assemblies must be aligned after site installation and at regular
maintenance intervals. This applies to factory-mounted units (new or rebuilt) because
factory alignment is often disturbed during shipping and handling. Flexible couplings
shall be used to connect pump to its driver (unless otherwise specified by Imo Pump).