304E2 Main Pump Disassembly

304E2 Mini Hydraulic Hydraulic Excavator Excavator ME400001-UP ME400001-UP (MACHINE) (MACHINE) POWE... POWE...

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Welcome: j210es Product: MINI HYD EXCAVATOR Model: 304 E2 MINI MINI HYD EXCAVATOR ME4022 71 Configurati Configuration: on: 304 E2 Mini Hydrauli Hydraulic c Excavato r ME400 001 -UP ( MACHINE) MACHINE) POWERED BY C2.4 Engine

Disassembly and Assembly 303.5E2 CR, 304E2 CR, 305.5E2 CR and 305E2 CR Mini Hydraulic Excavators Machine Systems Media Number -UENR5 5 92 -01

Publicat ion Date -0 1 /0 9/20 1 4

Date Updated -1 7/10 /20 16

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Main Hydraulic Pump - Disassemble SMCS - 5070-015

Disassembly Procedure Table 1 Required Tools Tool

Part Number

A

9S-9152

Part Description

Bearing Puller

Qty

1

Start By:

a. Remove the piston pump (main hydraulic).

Illustration 1

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304E2 Mini Hydraulic Excavator ME400001-UP (MACHINE) POWE...

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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

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4. Remove O-ring seals (7) and O-ring seal (8) from valve group (4).

Illustration 3

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Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure.

5. Remove gasket (9) from compensator valve (5). 6. Remove plug (15), O-ring seal (14), spring (13), spring (12), guide (11), and spool (10) from compensator valve (5).



7. Remove plug (21), O-ring seal (20), spring (19), spring (18), guide (17), and spool (16) from compensator valve (5).

Illustration 4

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Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure.

8. Remove plug (24) and the O-ring seal. 9. Remove bolts (23) and head assembly (22).

Illustration 5

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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.



Illustration 6

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Illustration 7

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12. Remove bearing cone (28), O-ring seals (29), and shim (30).

Illustration 8

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13. Carefully place main drive pump housing (6) in a horizontal position. 14. Remove rotary group (31) from main drive pump housing (6). Note: Rotary group (31) is not serviced separately.


Illustration 9


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15. Remove swashplate (32) from main drive pump housing (6).

Illustration 10

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16. Remove shaft assembly (33) and spring (34).

Illustration 11

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17. Use Tooling (A) and a suitable press in order to remove bearing cone (35) from shaft assembly (33).


Illustration 12


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18. Remove screws (36) and bearings (37). 19. Remove bearing cup (38) if necessary.

Illustration 13

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20. Remove retaining ring (39) and shaft seal (40) from main drive pump housing (6). Copyright 19 93 - 2 017 Caterpillar Inc. All Rights Reserved. Private Netw ork Fo r SIS Licensees.

Thu Dec 21 2017 16:53:25 GMT+0700 (SE Asia Standard Time) j210es

304E2 Main Pump Disassembly

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