Gorman-Rupp Pumps 81 1/2B3-B 263741 and up - Manual (Page 13)

OM−00745 80 SERIES
PAGE B − 6 INSTALLATION
Figure 3B. Aligning Non-Spider Type
Couplings
Align non-spider type couplings by using a feeler
gauge or taper gauge between the coupling halves
every 90 degrees. The coupling is in alignment
when the hubs are the same distance apart at all
points (see Figure 3B).
Check parallel adjustment by laying a straightedge
across both coupling rims at the top, bottom, and
side. When the straightedge rests evenly on both
halves of the coupling, the coupling is in horizontal
parallel alignment. If the coupling is misaligned,
use a feeler gauge between the coupling and the
straightedge to measure the amount of misalign-
ment.
V-Belt Drives
When using V-belt drives, the power source and
the pump must be parallel. Use a straightedge
along the sides of the pulleys to ensure that the pul-
leys are properly aligned (see Figure 3C). In drive
systems 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 3C. 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
shields and/or guards in place over the
drive shaft, belts, and/or couplings, or
other rotating parts. Exposed rotating
parts can catch clothing, fingers, or
tools, causing severe injury to person-
nel.
GROUNDING
If the pump has been approved to pump volatile or
flammable liquids, the unit must be grounded by
attaching the ground wire assembly to a ground
rod in order to eliminate electrostatic build-up by
the liquid being pumped. Install the ground rod in
accordance with the National Electrical Codes and
all local codes. Be sure the fastening device makes
a tight electrical connection with the rod and the
pump.
Inspect and test the ground wire assembly
for conductivity. replace broken or frayed
wire before resuming operation.