Gorman-Rupp Pumps 612L20B-B 806819 and up - Manual (Page 13)

OM-01919 60 SERIES
PAGE B - 6 INSTALLATION
are properly aligned (see Figure B-5). In drive sys­
tems using two or more belts, make certain that the
belts are a matched set; unmatched sets will cause
accelerated belt wear.
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure B-5. Alignment of V‐Belt Driven
Pumps
Tighten the belts in accordance with the belt manu­
facturer's instructions. If the belts are too loose,
they will slip; if the belts are too tight, there will be
excessive power loss and possible bearing failure.
Select pulleys that will match the proper speed ra­
tio; overspeeding the pump may damage both
pump and power source.
Do not operate the pump without the
guard in place over the rotating parts.
Exposed rotating parts can catch cloth­
ing, fingers, or tools, causing severe in­
jury to personnel.
V‐Belt Jack Shaft Drives
If the pump is to be driven at speeds exceeding
1050 rpm, the V‐belts must operate through a jack
shaft arrangement to protect the shaft bearings
from excessive stress. Failure to use a jack shaft on
high speed applications will result in premature
shaft bearing failure.