Service manual

21
F.1 FILTERS AND STRAINERS
All filter and strainer elements should be periodically checked for cleanliness and cleaned or
replaced as necessary. This will protect equipment from damage due to pressure-drop across
clogged or dirty elements.
F.2 FOUNDATION
Foundation and hold-down bolts should be checked for tightness at least every six months.
F.3 ALIGNMENT
Alignment of pump and its driver should be checked and corrected, if necessary, at least every
six months. If system experiences an unusual amount of vibrations or large variations in
operating temperatures, this should be done often. Well-maintained alignment will help insure
maximum equipment life.
WARNING
Rotating parts, such as couplings, pulleys, external fans, or unused shaft extensions
should be permanently guarded against accidental contact with personnel or clothing.
This is particularly important where parts have surface irregularities such as keys or
set- screws.
F.4 LUBRICATION
F.4.1 Bearings
Pump environment, operating conditions and intervals between bearing checks all effect
bearing life. Bearings have a finite life and should be checked often for increase in
temperature and/or rough operation. If either condition is noted, stop equipment and
replace bearing. When grease or oil fittings are provided, lubricate bearings as
specified in applicable pump instruction manual.
CAUTION
ATTENTION
Continued running with a rough or worn bearing can lead to catastrophic bearing
failure which could cause seal and/or pump failure.
F.5 PACKING
A pump should be repacked when all packing gland travel is exhausted or when packing is
damaged. Follow packing replacement instructions in applicable pump instruction manual.
F.6 SHAFT SEALS AND LEAKAGE
Visually check equipment frequently for signs of damage/leakage from shaft seals, gaskets or
O-rings. Be sure all connections are tight. If seal leakage is more than about 10 drops per
hour per seal, shut down equipment and repair or replace necessary parts. Shaft seals have a
finite life which is affected by operating conditions and environment. Expect them to wear and
eventually fail. When leakage becomes unacceptable, replace seal unit with one compatible
with pump’s operating conditions. Dirty liquids will reduce seal life.
NOTE: A very small amount of leakage (~10 drops per hour per seal) is normal, even when
shaft seals are new.