Flowserve APKD - Manual (Page 40)

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13
Page 40 of 55 flowserve.com
 Disconnect the discharge head [304] and
lift
 Now lift the pump again by using column
pipe flange and disconnect the first section
of column piping
 Remove the bearing retainers [307] and
shaft couplings [70] and repeat the process
until all column piping is disassembled
 Last step is to lift and remove the bowl
assembly
See section 2.3, 4.1.2 and 4.1.3 for related
information.
6.9 Examination of parts
Used parts must be inspected
before assembly to ensure the pump will
subsequently run properly. In particular, fault
diagnosis is essential to enhance pump and plant
reliability.
Before proceeding with assembly, thoroughly clean
all bolts, nuts, threaded connections and mating
faces. Clean up any burrs with a file or emery
cloth.
Before dismantling the pump for overhaul, ensure
genuine Flowserve replacement parts are
available.
Refer to sectional drawings for part numbers and
identification.
Cleanliness and proper lubrication
are required to guarantee ease of re-assembly and
proper pump operation.
6.9.1
Examination of shaft/s
Check the shafts for straightness, pitting and wear.
Remove all burrs or nicks. Shaft damage is usually
best corrected by replacing the shaft.
The shaft must be straight to within 0.127 mm (0.005
in.) total indicator reading. The detail below shows
the recommended method for checking shaft
straightness. If the shaft is not straight, it must be
straightened or replaced. If the deflection is gradual
over a considerable len gth, the shaft can usually
be straightened by supporting on two blocks
straddling the crooked section and applying
pressure to the high side to deflect the shaft in the
opposite direction. If the shaft has a sharp crook
(dog-leg), it is recommended that the shaft be
replaced since the shaft will not always remain
straight, even if satisfactorily straightened.
Figure 6.1
ROLLERS
DIAL INDICATOR
SHAFT
Even if the shaft is new or has been
previously straightened, it is recommended that the
shaft be re-checked at this point to ensure damage
has not occurred in transit or handling.
6.9.2
Examination of bearings
Check all bearings for total clearance over the shaft.
It is recommended that all bearings indicating visual
wear be replaced. In addition, any bearings whose
running clearance exceeds "As New" tolerances by
more than 50% should be replaced (see table
6.8.2.1).
Rubber bearings should always be
replaced when servicing a pump.