E & EH Series Pumps -
If impeller (16) requires replacing,
remove jam nut (17) place a flat screwdriver in the slot of the
end of the shaft to hold the shaft stationary while unscrewing
the impeller (16). Once impeller (16) is removed, remove shims
(14), (15), (25) and exclusion seal (19) if damaged or cut.
H Series Pumps -
If impeller (16) requires replacing, remove
cap screw (30) and washer (29) from shaft. Place a flat
screwdriver in the slot of the end of the shaft to hold the shaft
stationary while unscrewing the impeller (16). Once impeller
(16) is removed, remove exclusion seal (19) if damaged or cut.
F-2.2) Reassembly:
E & EH Series -
Position exclusion seal (19) on shaft until it
seats against the stationary portion of seal (9). Place shims (14,
(15), (25) on shaft until it seats against exclusion seal (19). To
install impeller (16), clean the threads with loctite cleaner and
screw impeller (16) onto the shaft hand tight. Apply thread
locking compound to shaft threads and install nut (17). Shim to
within .005/.015 from Impeller to Volute. Torque to 40 ft. lbs.
Rotate impeller to check for binding. Position impeller and
motor assembly on volute (10). Apply thread locking compound
to cap screw (11) and position lockwasher (12) on cap screw
(11) and screw into volute (10). Torque to 8 ft. lbs. Check for
free rotation of motor and impeller.
H Series -
Position exclusion seal (19) on shaft until it seats
against the stationary portion of seal (9). To install impeller (16),
clean the threads with loctite cleaner and screw impeller (16)
onto the shaft hand tight. Place washer (29) onto cap screw
(30). Apply thread locking compound to the threads of cap
screw (30) and insert into shaft and torque to 2 ft. lbs. Check
for free rotation of motor and impeller.
Install U-cup (20) by first applying adhesive to bore of volute
(10). Be sure not to get adhesive on inside diameter of U-cup
(20). Position gasket (13) on volute flange and reposition volute
onto motor and impeller assembly, aligning for fasteners.
CAUTION:
When assembling volute (10) to the rest of the
pump be sure the inside lip of the U-cup (20) is not pushed out
of place (See Figure 3). Position cap screws (11) with
lockwasher (12) through motor housing (5) and volute (10). and
tighten to 11 ft lbs.
F-3) Motor, Bearing and Seal Service
F-3.1) Disassembly and Inspection:
To examine or replace the motor (5), bearing (8) and shaft seal
(9), disassemble volute and impeller as outlined in paragraph
F-2.1. Drain oil from motor as outlined in paragraph F-1.3.
Position unit upright, using blocks to avoid resting unit on shaft.
Remove gland nut (28b), friction rings (28c) and grommet (28d)
from motor housing (3), see Figure 7. If pump is equipped with
temperature sensor, also remove gland nut (39b), friction rings
(39c) and grommet (39d), from motor housing (3). Remove
socket head cap screws (23) and lift motor housing (3) from
lower end bell (22). Slide motor housing (3) up cable(s) (28),
and (39 if pump is equipped with temperature sensor), until wire
connectors and ground screw are exposed. Remove cable lead
wires from motor lead wires and temperature sensor wires ( if
equipped) from control cable, by disconnecting wire
connectors (4), (34) & (38) and ground screw (27) from motor
(5). The wiring connections should be noted to insure correct
connections when reassembling.
Motor-
Remove the motor bolts and lift motor stator from motor
rotor and lower end bell (22). Unscrew conduit bushing (6) from
lower end bell (22) and lift motor rotor, shaft, bearing (8),
rotating portion of seal (9), washer (7) and conduit bushing (6)
from lower end bell (22). Inspect windings for shorts and check
resistance values. Check rotor for wear, if rotor or the stator
windings are defective, the complete motor must be replaced.
To test the temperature sensor (if equipped), check the
continuity between the black and white wires. If found to be
defective contact a motor service station or Barnes Pumps’
Service Department. Check motor capacitor (32) on single
phase units with an Ohm meter by first grounding the capacitor
by placing a screwdriver across both terminals and then
removing screwdriver. Connect Ohm meter (set on high scale)
to terminals, if needle moves to infinity (
∞ )
then drifts back,
the capacitor is good. If needle does not move or moves to
infinity (
∞
) and does not drift back, replace capacitor (32).
Fig. 3
PROPER POSITION OF U-CUP (16).
IMPROPER POSITION OF U-CUP (16).
Adhesive
Impeller
U-Cup
Volute
Adhesive
Volute
U-Cup
Impeller
Pump
Center Line
Pump
Center Line
10
