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Volute Casing - TM-5-4320-242-140071
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TM-5-4320-242-14 Pump Assembly Flammable Liquid; Bulk Transfer; Gasoline Engine Driven; 350-GPM Capacity at 190 Foot Head; Wheel Mounted Manual
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Figure 6-2. Suction and discharge gate valves, exploded view Model 84C15-4A084
clearance between impeller face and
(1) Install the eight studs (13), eight studs
wear
plate
face
should
be
(14), four studs (48), reducer bushing (46) and drain
approximately .008 to .015 inches. If
cock (43) on the volute casing (49).
rubbing occurs, two volute gaskets
(2) Install the wear plate (15) and secure with
(21) will be required and additional
two lock-washers (11) and nuts (10).
shims (18) must be added between
impeller (17) and sleeve (23) to get
NOTE
proper clearance between impeller
On model US36ACG. the wear plate
face and wearplate face.
(15) is secured with two flat head
machine screws.
(4) Install the engine and pump assembly
(3) Install the small valve weight (5) and large
6-5. Suction and Discharge Gate Valves
valve weight (7) on the flap valve gasket (6), secure
with two lock-washers (8) and screws (9).
a. Removal. Refer to paragraph 4-26 and remove
NOTE
the suction and discharge gate valves.
On model US36ACG, two nuts (4) are
b. Disassembly.
Refer  to  figure  6-2  and
used  with  the  screws  (9)  and
disassemble the suction and discharge gate valves.
lockwashers (8) that secure the large
c. Cleaning, Inspection, and Repair.
valve weight (7) and small valve
weight (5) to the flap valve gasket (6).
(1) Wash all parts with cleaning solvent-
PD680. Dry thoroughly.
(4) Install the flap valve assembly (3) and the
suction adapter (2), secure with four nuts (1) to the
(2) Inspect body for cracks and breaks.
volute casing (49).
Inspect valve seats for pitting, grooves, cracks, and
excessive wear.  If seats are slightly pitted, dress up
e. Installation.
with emery cloth.  Clean surfaces evenly to assure
proper seating of the disc.
(1) Position gasket (21) on volute casing (49).
(3) Inspect discs for wear and damage.
(2) Aline the volute casing (49) against the
intermediate housing (35) carefully. Do not damage the
(4) Inspect valve stem for bends and thread
gasket (21) impeller (17) or studs (14).
damage.
(3) Secure  the  volute  casing
to
the
(5) Replace a defective part.
intermediate housing with eight nuts (37).
(6) Discard gasket and packing.
NOTE
d. Reassembly.
On model US36ACG, lockwashers
are used with the eight nuts (37) that
(1) Refer to figure 6-2 and reassemble the
secure the volute casing (49) to the
suction and discharge gate valves.
intermediate housing (35).
(2) Use new gasket and packing during
CAUTION
reassembly.
When tightening the first two nuts,
e. Installation. Refer to paragraph 4-26 and install
rotate the impeller shaft to determine
the suction and discharge gate valves.
the  possibility  of  the  impeller
rubbing on wear plate. With all nuts
tight,
6-4

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