Crane PROSSER HYMERGIBLE 7-06000 Series, Инструкция по установке и эксплуатации

Страница: 9 / 22

9
F-2.2) Reassembly:
To reassemble, insert key (15) into shaft (39), slide shims
(17a), (17b) & (17c) onto shaft, then apply an anti-seize
compound on the shaft area where the impeller fi ts. Insert
o-ring (43) into groove on impeller (3) and slide the impeller
(3) onto the shaft, replace washer (27) and two locknuts (16)
as shown in Fig. 7 & 8, onto shaft and tighten to 37 ft lbs.
Replace suction case (4) onto diff user (9) and brackets (41-
on 7-08 models), lining up holes and inserting cap screws
(32) with fl at washers (30) tightening to 5 Ft. lbs.
2-STAGE MODELS: To reassemble, insert keys (15) into
shaft (39), slide inner shims (17a), (17b) & (17c) onto shaft,
then apply an anti-seize compound on the shaft area where
the impeller fi ts. Insert o-ring (43) into groove on inner
impeller (3) and slide the impeller (3) onto the shaft. Place
lower diff user assembly (46) onto upper diff user (9). Slide
spacer (45) and outer shims (17a), (17b) & (17c) onto shaft,
then apply an anti-seize compound on the shaft area where
the outer impeller fi ts. Insert o-ring (43) into groove on outer
impeller (3) and slide the impeller (3) onto the shaft, replace
washer (27) and locknut (16) onto shaft and tighten to 30 ft
lbs. Replace suction case (4) onto diff user (9) and brackets
(41), lining up holes and inserting cap screws (32) with fl at
washers (30) tightening to 5 Ft. lbs.
After assembly, check that the impeller rotates smoothly, but
with a slight drag due to bearing and rotary seal friction. If the
impeller turns roughly, the bearings should be replaced (See
Section F-6), If impeller hangs up or is hard to turn, the gap
between the impeller and suction case should be checked.
To check the gap, a feeler gauge should be used. Check the
gap between the suction case liner and the impeller vanes
as shown in Figure 3. Determine the proper gap setting from
Table 2 and adjust by adding or removing shims (17a), (17b)
& (17c) behind the impeller.
TABLE 2 - IMPELLER GAP
PUMP MODEL HP, 60 CYCLE GAP “X”
7-06000 10.5 .020 to .030
7-08000 17 .020 to .030
7-08000 2 Stage 17 .020 to .030
Inspect strainer (24) and clean, making sure hole are not
clogged to ensure unrestricted fl ow. Now position strainer
(24) onto suction case (4). On 7-06 pump models insert the
rest of cap screws (32) with fl at washers (30) tightening to 5
Ft. lbs. On 7-08 models insert three screws (40) in holes and
tightening.
F-3) Shaft Seal & Bearing Service:
F-3.1) Disassembly:
To replace shaft seal, drain oil per Section F-1.1 and remove
impeller per Section F-2. Remove the lower end assembly
from the frame and motor assembly by lightly tapping the
diff user (9) with a plastic hammer, until free. Now remove
o-rings (19) and (20), replace o-rings showing any nicks, cuts
cracks, or deformation. Slip the lower end out of the frame
assembly being careful not to lose the motor shaft key (14).
Remove the seal retaining ring (10a) seal spring (10b), and
seal rotating member (10c) from shaft (39), See Figure 4.
Examine all seal parts and specifi cally contact faces.
Inspect seal for signs of uneven wear pattern on stationary
members, chips and scratches on either seal face.
DO NOT
interchange seal components, replace the entire shaft seal
(10). Disconnect lock wire (29) and remove sleeve nut (28)
from sleeve (12), then push sleeve (12) out of diff user (9).
Using a pair of snap ring pliers, remove the retaining ring (42)
from sleeve (12). Remove the stub shaft (39) assembly with
bearings (7) and (8). This will allow the removal of stationary
(10d) by pushing out from the back side of sleeve (12).
Bearings that feel rough, show wear or rust should be
replaced. Using a press or bearing puller, remove bearings
(7) & (8) if replacement is needed. When removing or
installing bearings, always press on or off by the inner race.
DO NOT push on the outer race .
F-3.2) Reassembly:
On 7-06 pump models, press bearings (7) and (8) onto shaft
(39). On 7-08 pump models with angular contact bearing(s)
(7), it is
IMPORTANT that this bearing be installed as shown
in Figure 5. The outer race of bearing (7) that is imprinted
with the words
“SUPPORT HERE” must be positioned
toward the diff user (9). Axial thrust after start up is in the
direction towards the impeller. Inner race of bearing has more
surface area on top side when installed correctly.
FIGURE 4
FIGURE 3