416D, 420D, 424D, 428D, 430D, 432D, 438D and 442D Backhoe Loaders Machine Systems Caterpillar

Assembly Procedure

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Illustration 1	g00778819

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Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

1. Install ring (11) , ring (17) , O-ring seal (10) , O-ring seal (12) , seal (15) , and seal (16) onto cylinder head (13) . Use Illustration 1 to ensure that the rings, the O-ring seals, and the seals are oriented properly.

2. Apply Tooling (C) to Surface (X) of wiper seal (14) .

3. Install wiper seal (14) onto cylinder head (13) . Use Illustration 1 to ensure that the wiper seal is oriented properly.

4. Use hydraulic fluid to lubricate the sealing lips of seal (15) , seal (16) , and wiper seal (14) .

5. Place the components of the stick cylinder in position on Tooling (A) .

6. Hand tighten cylinder head (13) onto cylinder body (8) .

7. Push cylinder rod (9) into cylinder head (13) .

8. Remove cylinder head (13) and cylinder rod (9) from cylinder body (8) .

9. Install seal (5) and ring (4) onto piston (6) .

10. Lubricate the threads of nut (3) with Tooling (D) .

11. Install nut (3) and piston (6) onto cylinder rod (9) . Tighten nut (3) to a torque of 3200 ± 200 N·m (2360 ± 150 lb ft).

12. Install spring (7) , ring (2) , and plunger (1) into cylinder rod (9) .

13. Lubricate the threads of cylinder head (13) with Tooling (D) .

14. Install piston (6) , cylinder rod (9) , and cylinder head (13) into cylinder body (8) .

    Note: Be sure that plunger (1) fits into the port at the other end of cylinder body (8) .

15. Use Tooling (B) to tighten cylinder head (13) to a torque of 600 ± 130 N·m (440 ± 95 lb ft).

End By: Install the boom cylinder onto the machine. Refer to Disassembly and Assembly, "Boom Cylinder - Install".