Flowserve Guardian Sealless Metallic - Manual (Page 42)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 42 of 68 flowserve.com
g) Remove the inner magnet [220] and pump shaft
(2100.1) from the bearing holder [3830]. Keep
the shaft in line with the bearing holder as it is
removed so as to avoid cocking the assembly in
the holder. (Figure 6-12.) Avoid prying or tapping
the assembly when removing.
Figure 6-12: Inner magnet/shaft assembly
h) Remove the T-shaped outboard bushing [216] from
the bearing holder [3830]. (Figure 6-13.) H Series
pumps utilize an alloy cartridge to hold both the
inboard [212] and outboard bushing [216] in the
bearing holder. These cartridges are assembled at
the factory. Do not attempt to disassemble bushing
from cartridge. (Figure 6-14.)
Figure 6-13: Bearing holder with outboard bushing
Group 1 inboard and outboard
bushings and thrust journals are NOT
interchangeable.
Group 2 inboard and outboard bushings are
interchangeable – be sure to mark inboard vs.
outboard upon removal for later evaluation.
Group 2 inboard and outboard thrust journals are
NOT interchangeable.
Remove the inboard T-shaped bushing [212]
from the bearing holder.
Figure 6-14: Bushings
If disassembly of the inner magnet
assembly/pump shaft is required, follow steps i)
and j). Disassembly is necessary if the pump
shaft [2100.1] or inner magnet [220] needs to be
replaced. Otherwise, skip to Section 6.7.5.
Newer Guardian pumps have shaft
caps [222] that are LEFT HAND thread. These
are indicated by an “LH” stamped into the end of
the cap. Older pumps that do not have the “LH”
marking utilize right hand threads. All
replacement shafts/caps will have left hand
threads.
i) Unscrew the pump shaft cap [222]. Remove the
cap/inner magnet O-ring [4610.6] and discard. Pull
the pump shaft out and remove the pump shaft key
[6700.2]. Remove the pump shaft gasket [4590.6]
and discard. Remove the silicon carbide thrust
journal
[217] from the inner magnet assembly [220].
(Figure 6-15.) If the silicon carbide journal is lodged
in place, use the two holes in the inner magnet to
push the journal out. If the pump shaft or pump
shaft journal [213] does not need replacement, stop
here and do not perform step j) because the wet
end disassembly is complete. However, if the
pump shaft or pump shaft journal does need
replacement, proceed to step j).
Figure 6-15: Outboard thrust journal
Wear eye/hand protection as shaft journal
is broken.