Goulds Pumps AF (Axial Flow) (42"/1200mm/54/60"/66") LM/LMR Bearings - IOM" - Manual (Page 19)

AF (42-66) IOM 19
7. Run each stop nut down to make light contact with
the spring retainer. Lock in place by turning the
jam nut down tight against the stop nut.
8. Inspect each spring holder to check the gap
between the coils of the spring. There must be
enough total gap to accommodate the downward
thermal expansion of the system without having
them compressed solid.
NOTE: Pumps with oil lubrication should be
checked for oil level while thermal expansion is
taking place. It may be necessary to add oil to the
bearing housing to provide the proper oil level to
the higher bearing. A line parallel with the sub-
base deck through the proper oil level line will
show the correct level at the highest end of the
bearing housing. A horizontal line back from that
point will establish the proper level mark on the
sight gauge.
The system should be operated at normal temperature
before the adjusting screw holders are grouted in
place. Some customers operate their units with the
adjusting screw holders ungrouted.
If it becomes necessary to remove a spring assembly
from a spring pocket, for safety the following steps
should be strictly adhered to:
1.
Make sure the spring is relaxed. If the spring
cannot be relaxed with the adjusting screw, the safest
method is to pry off the Plexiglas cover and cut the
coils using a torch.
2.
Remove the bolts or cap screws, which fasten
the spring retainer to the holder and lift out the entire
assembly.
3. When the pump is connected to the system and
a spring is removed, there should be support under the
sub-base near the spring location until the spring has
been replaced and adjusted. Distortion of the sub-
base will affect the pump alignment, and the weight of
the components is more likely to cause distortion when
the pump is connected to the rigid pipe system.
4. If a spring is replaced while the system is hot,
the stop nut should not be set until the system is cold.
The springs must be allowed to push the base back to
its cold position.
An optional grease filled spring pocket is shown in
figure 11. The difference between the standard pocket
and the grease filled pocket is the addition of a grease
fitting and grease seal. Adjustment and setting of the
grease filled pocket are identical.
CONNECTION OF PIPING
GENERAL
Never draw piping into place by
forcing at the flanged connections of
the pump. This may impose
dangerous strains on the unit and
cause misalignment between pump
and driver. Pipe strain will adversely
effect the operation of the pump
resulting in physical injury and
damage to the equipment.
Guidelines for piping are given in the “Hydraulic
Institutes Standards” available from: Hydraulic
Institute, 30200 Detroit Road, Cleveland OH 44145-
1967 and must be reviewed prior to pump installation.
WARNING
Never draw piping into place by forcing at the
flanged connections of the pump. This may
impose dangerous strains on the unit and cause
misalignment between the pump and driver. Pipe
strain will adversely affect the operation of the
pump resulting in physical injury and damage to
the equipment.
1. All piping must be supported independently of, and
line up with the pump flanges.
2. Piping runs should be as short as possible to
minimize friction losses
3
Fig. 11
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