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𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
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2. Shutdown SIS
Previous Screen
Product: SKID STEER LOADER
Model: 252B3 SKID STEER LOADER TNK
Configuration: 252B Skid Steer Loader TNK00001-UP (MACHINE) POWERED BY C3.4 IND Engine
Disassembly and Assembly
259B3 Compact Track Loader, 247B3 and 257B3 Multi Terrain Loaders and 216B3,
226B3, 236B3, 242B3 and 252B3 Skid Steer Loaders Power Train
Media Number -UENR0251-07 Publication Date -01/07/2018 Date Updated -11/07/2018
i02358306
Piston Pump (Hydrostatic) - Disassemble
SMCS - 5070-015-H7
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9U-7289 Ruler 1
B 1P-1861 Retaining Ring Pliers 1
C 138-7576 Link Brackets 2
D 8T-4956 Bolts (M12 - 1.75 - 35 MM) 2
E 8T-4223 Hard Washers (13.5 - 25.5 - 3 MM THK) 2
F 1P-0510 Driver Gp 1
G 1P-1854 Retaining Ring Pliers 1
H 1U-7600 Slide Hammer Puller Gp 1
J 1P-1860 Retaining Ring Pliers 1
K 8H-0663 Bearing Puller Gp 1
Start By:
a. Remove the piston pump. Refer to Disassembly and Assembly, "Piston Pump - Remove".
Note: The following procedure is intended for cleaning purposes only.
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3. Illustration 1 g00903455
1. Remove the fittings and connectors (1).
2. Remove speed sensing valve (2).
Illustration 2 g00903457
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
3. Remove cover (3) and the spring for the crossover relief valve.
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4. Illustration 3 g00903461
Illustration 4 g00903467
4. Remove seat (4).
5. Note the orientation of spring (5).
6. Remove O-ring seal (6) from cover (3).
7. Remove back up ring (7) from cover (3).
8. Repeat Step 3 through Step 7 for the other covers.
Illustration 5 g00903500
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5. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
9. Remove plug (8) for the charge relief valve.
Illustration 6 g00903502
Illustration 7 g00903503
10. Remove seat (9).
11. Remove shims (12).
12. Remove spring (13).
13. Remove seal (11) from plug (8).
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6. 14. Remove O-ring seal (10) from plug (8).
Illustration 8 g01178122
15. Use Tooling (A) to measure the distance from the stud to the nut. Record the distance for
assembly purposes.
Illustration 9 g00904929
16. Remove screws (14).
17. Remove nut (15).
18. Remove cover (16).
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7. Illustration 10 g00904930
19. Remove O-ring seal (17) from cover (16).
Illustration 11 g00904933
20. Use Tooling (B) to remove retaining ring (18). Remove actuator assembly (19).
Illustration 12 g00905018
21. Remove O-ring seal (20) from actuator assembly (19).
Illustration 13 g01054368
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8. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
Illustration 14 g01054370
Note: Keepers (21) must be marked for assembly. Do not mix keepers (21). The keepers are
not interchangeable.
22. Place actuator assembly (19) in a suitable press.
23. Remove keepers (21).
24. Remove shaft (26).
25. Remove spring retainer (22).
26. Remove spring (23).
27. Remove spring retainer (24).
28. Remove spacer (25).
29. Repeat Step 15 through Step 28 for the other cover.
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9. Illustration 15 g01178123
30. Remove caps (27).
31. Remove connectors (28).
32. Remove fitting (29).
33. Remove adapter (30).
Illustration 16 g00905035
Note: Mark the location of the notch in stud (31) by making a corresponding mark on the
housing for installation purposes.
34. Use Tooling (A) to measure the distance from stud (31) to nut (32). Record the distance for
assembly purposes.
35. Remove stud (31) and nut (32).
36. Repeat Step 34 and Step 35 for the other stud.
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10. Illustration 17 g01178125
37. Remove connector (33).
38. Remove caps (34).
39. Remove fittings (35).
Illustration 18 g00905224
40. Use Tooling (A) to measure the distance from studs (36) to nuts (37). Record the distance
for assembly purposes.
41. Remove studs (36) and nuts (37).
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11. Illustration 19 g01178127
42. Remove bolts (38) from cover (39).
Illustration 20 g00973868
43. Use a suitable lifting device, Tooling (C), Tooling (D), and Tooling (E) to raise the piston
pump housing.
Illustration 21 g01178130
Note: Mark the port plates for assembly. Port plates are not interchangeable.
44. Remove port plate (40).
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12. Illustration 22 g01178131
45. Remove plug (41) and the O-ring seal.
Illustration 23 g01178132
46. Remove slotted pin (42).
47. Repeat Step 45 and Step 46 for the other side.
Illustration 24 g01178133
48. Remove the rotating assembly and swashplate (43).
49. Remove linkage (44).
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13. Illustration 25 g01178135
50. Remove bearing assemblies (45) and (46).
51. Remove swashplate (47).
Illustration 26 g01178137
Note: Mark the reaction plate assembly and the barrel.
52. Remove reaction plate assembly (48) from barrel (49).
Illustration 27 g00905445
53. Remove the retainer and shims (51) from barrel (50).
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14. Illustration 28 g00973870
Illustration 29 g00905448
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
54. Place barrel (50) in a suitable press.
55. Use Tooling (F) and Tooling (G) to remove retaining ring (52) and spring (55).
56. Remove washer (54).
57. Remove pins (53).
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your reading. Please Click
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MANUAL. NO WAITING
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16. Illustration 30 g00905648
58. Remove bearing races (56) from pins (57).
Illustration 31 g00905650
59. Remove O-ring seal (58).
60. Inspect dowel (59) for damage.
Illustration 32 g00905577
61. Use Tooling (B) to remove retaining ring (60).
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17. Illustration 33 g00973871
62. Use Tooling (H) to remove seal (61).
Illustration 34 g00905582
63. Use Tooling (B) to remove retaining ring (62).
Illustration 35 g00905653
64. Remove shaft (63).
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18. Illustration 36 g00973872
65. Use Tooling (J) to remove retaining ring (64).
Illustration 37 g00973873
66. Use a suitable press and Tooling (K) to remove bearing (65).
Illustration 38 g00906134
67. Remove bearing (66).
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19. Illustration 39 g00906511
68. Remove actuator (67).
Illustration 40 g00906515
69. Remove seal (68).
70. Remove liner (69).
71. Repeat Step 42 through Step 70 for the other end of the piston pump.
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