9
11.0 MAINTENANCE AND INSPECTION
SCHEDULE
It is recommended that maintenance and inspection is
done on a scheduled basis. Maintenance requirements
will naturally vary widely for each installation and specif-
ic operating conditions. It is suggested that a complete
inspection be performed with the necessary maintenance
at the end of the first day, the first week, the first month
and the first 3 months. These inspections will be indica-
tive of how often future maintenance will be necessary.
Every Week
Inspect the Filter cartridge. Clean or replace as required.
Remove any fines collected from the catch pan. This
time interval should be shortened if experience indicates
unusual dust loading. Check the system for air leaks and
correct as required.
Every Month
Inspect the vacuum breaker valve filter/silencer. Clean or
replace as required.
If service to the vacuum breaker is required remove it
from the filter housing.
Every 6 Months
Disconnect power and check for loose electrical
connections. Tighten all bolts and nuts that may have
To inspect or replace belts
remove 2 bolts from each
end of belt guard and lift
belt guard vertically.
Bolt belt guard back in place
when maintenance complete.
Slightly loosen 4 each
hex nuts on the motor base
just enough to allow the
motor to slide on the base.
Use 9/16” wrench
for
3 through 10 Hp units.
Use 3/4” wrench for
3 through 10 Hp units.
Adjust 1 bolt on each side
Figure 4
Typical both sides
loosened due to vibration.
11.1 Belt Adjustment and Replacement
11.1.1 Inspecting V- Belts
1.
Remove the pump from service and disconnect
electrical power.
2.
To inspect V-belts, remove the 2 bolts on ends of the
belt guard (see figure 4). Carefully examine each belt
for excessive stretch, looseness, frayed surfaces or
exposed cord. Replace all belts if one or more belts are
found to be excessively worn. Always replace belts as
a set; never individually.
3.
Inspect the belt tension (figure 5) using the specifica-
tions in the chart, below. Once belts are found in good
condition and tensioned properly, replace the outside
panel ensuring all 4 screws are fastened properly.
Never operate the pump without the belt guard firmly
installed.
of the motor base allowing the motor to slide, loosening
or tensioning the belts.
Use 3/4” wrench for 3 through 10 Hp units.
Use 15/16” wrench for 15 and 20 Hp units.
Figure 5
Pump Model
Existing Belt
Re-tensioning
Pressure (lb.)
*New Belt
Tensioning (lb.)
Belt Deflection
at Pressure
(jn.)
VPDB-3
3.4
5.1
0.31
VPDB-5
4.2
6.3
0.31
VPDB-7.5
3.6
5.4
0.31
VPDB-10
4.1
6.2
0.31
VPDB-10/3
4.1
6.2
0.31
VPDB-15
4.4
6.6
0.31
VPDB-20
4.6
6.9
0.34
Figure 6
