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Model 150 / 160 / 300 Pumps
The pump can be
reassembled into
several configura-
tions as shown in
Figure 2-1. Before
disassembling the
pump, circle the
configuration that
matches the pump
being repaired.
This will be an
invaluable aid dur-
ing reassembly.
When removing the
endcases, use two
pullers, or alternate
one puller between
shafts.
The endcase may be
pulled off each
shaft about 1/8 in.
at a time. Alternate
the puller between
shafts to avoid mis-
alignment during
removal.
2-4
Disassembly
General Practice
1. Keep work area as clean as possible to avoid contamination of internal parts.
2. Replace gaskets, packings, and seals removed during repair. Replace all keys, spring
washers, and like items during assembly.
3. When removing gaskets, packings, or seals, do not use a metal tool to pry, pick, or
scrape. Doing this could scratch sealing surfaces. Use wood or plastic scrapers to
remove gasket material.
4. Before disassembly of any component, study exploded view illustration (Figure 4-1).
Pay particular attention to relationship of internal parts. Being familiar with con-
struction will speed up disassembly and help avoid improper assembly.
5. To prevent moisture or foreign material from entering open components, install
protective plugs or covers as soon as practical after disassembly. Wrap parts in clean
paper or clean lint-free cloths (1, Table 2-1).
6. Remove only the parts requiring repair or replacement. Do not disassemble pump
any further than necessary to complete needed repairs.
Disassembly Procedure
1. Remove cap screws (3, Figure 4-1), timing gear cover (2), and cover gasket (4).
Discard gasket.
2. Loosen timing gear locknuts (8) and unscrew until locknuts reach end of shaft.
This will protect the threads when the timing gears are pulled.
3. Fabricate timing gear puller as shown in Figure 2-2.
4. Install timing gear puller with cap screws on
timing gear (10, Figure 4-1). Tighten screws to take up slack and tap puller with a
hammer in line with shaft to free timing gear. Repeat procedure for other timing
gear.
5. Remove locknuts (8) and timing gears (10).
6. Remove cap screws (6), front cover (5), and cover gasket (4). Discard gasket.
7. Remove front cover seal (7) from front cover (5). Discard seal.
8. Remove setscrews (11) from endcases (15).
9. Remove bearing adjusting nuts (12) from endcases (15).
10. Remove cap screws (16), nuts (18), and washers (17) from drive endcase (15).
Do not hammer on pump endcase. This will cause gasket sealing surface dam-
age, resulting in leaks.
Use shaft protector between puller tip and shaft face to prevent distortion of
shaft center.
11. Using gear puller, remove drive endcase (15) and pump body gasket (20). Discard
gasket.
12. Remove cap screws (16), nuts (18), and washers (17) from timing gear end-
case (15).
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