304E2 Main Pump Disassembly
304E2 Main Pump Disassembly
304E2 Main Pump Disassembly
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Product: MINI HYD EXCAVATOR
Model: 304E2 MINI HYD EXCAVATOR ME402271
Configuration: 304E2 Mini Hydraulic Excavator ME400001-UP (MACHINE)
POWERED BY C2.4 Engine
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Disassembly Procedure
Table 1
Required Tools
Start By:
Illustration 1 g03358485
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1. Remove adapter (1), the O-ring seal, fitting (4), and the O-ring seal.
2. Remove bolts (5) and compensator valve (2) from main drive pump housing (6).
3. Remove valve group (4) from main drive pump housing (6).
Illustration 2 g03358668
4. Remove O-ring seals (7) and O-ring seal (8) from valve group (4).
Illustration 3 g03358679
6. Remove plug (15), O-ring seal (14), spring (13), spring (12), guide (11), and spool (10) from
compensator valve (5).
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7. Remove plug (21), O-ring seal (20), spring (19), spring (18), guide (17), and spool (16) from
compensator valve (5).
Illustration 4 g03358970
Illustration 5 g03358983
10. Remove O-ring seal (25) and port plate (26) from head assembly (22).
11. Remove bearing cup (27) from head assembly (22) if necessary.
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Illustration 6 g03359006
Illustration 7 g03359099
12. Remove bearing cone (28), O-ring seals (29), and shim (30).
Illustration 8 g03358995
13. Carefully place main drive pump housing (6) in a horizontal position.
14. Remove rotary group (31) from main drive pump housing (6).
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Illustration 9 g03359145
15. Remove swashplate (32) from main drive pump housing (6).
Illustration 10 g03359195
Illustration 11 g03359152
17. Use Tooling (A) and a suitable press in order to remove bearing cone (35) from shaft assembly (33).
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Illustration 12 g03359546
Illustration 13 g03359232
20. Remove retaining ring (39) and shaft seal (40) from main drive pump housing (6).
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