307E2 Mini Hydraulic Excavator Machine Systems Heating and Air Conditioning Unit - Install Caterpillar

Installation Procedure

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Illustration 1	g06016942
Front view of heating and air conditioning unit (50).

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Illustration 2	g06016954
Rear view of heating and air conditioning unit (50).

1. Install heating and air conditioning unit (50).

2. Install bolts (53) and bolts (52). Install bolt (51), not shown. Tighten bolts (53), bolts (52) and bolt (51) to a torque of 6 ± 1 N·m (53.11 ± 8.90 lb in).
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   Illustration 3	g06016937

3. Connect hose (49) and hose (48).
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   Illustration 4	g06016636

4. Connect hose assembly (47) and hose assembly (45). Install clamp (44) and bolt (46).
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   Illustration 5	g06016554

5. Use Tooling (A) and a suitable lifting device to install seat support (43).
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   Illustration 6	g06016548

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   Illustration 7	g06016544

6. Install bolt (42) and bolt (41) on the rear of the seat support.
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   Illustration 8	g06016514

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   Illustration 9	g06016507

7. On the left side of the seat support, install bolt (39). Install bolt (40) not shown.
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   Illustration 10	g06015730

8. Install bolt (38) on the front, right side of the seat support.
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   Illustration 11	g06015766

9. Install bolts (37) on the front, left side of the seat support.
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   Illustration 12	g06015677

10. Secure harness assemblies (35) to the floor plate with new cable strap (36).
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    Illustration 13	g06015650

11. Install duct (33) and screws (34).
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    Illustration 14	g06015397

12. Connect hose assemblies (32) to pilot valve (31).
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    Illustration 15	g06015370

13. Connect harness assembly (29) to sensor (30).
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    Illustration 16	g06015362
    Front of blade valve (25).

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    Illustration 17	g06015360
    Rear of blade valve (25).

14. Install blade valve (25). Install front bolt (28) and rear bolt (27). Connect harness assembly (26).
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    Illustration 18	g06015352

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    Illustration 19	g06015349

15. Install recessed bolt (24) and bolts (23).
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    Illustration 20	g06015340

16. Secure harness assemblies (22) to the floor plate with new cable straps (21).
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    Illustration 21	g06015270

17. On the back of front panel (18), connect harness assemblies (19) to hour meter (20).
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    Illustration 22	g06010044

18. Install front panel (18) and bolts (17).
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    Illustration 23	g06010107

19. Carefully install harness assembly (14) through console assembly (5). Install sleeve (16) on harness assembly (14). Install new cable straps (15).
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    Illustration 24	g06010282

20. Connect harness assemblies (14).
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    Illustration 25	g06010253

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    Illustration 26	g06010236

21. Install cover (13). Install boot (9) through opening (11).

22. Install armrest (10). Install pin (12).
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    Illustration 27	g06010037

23. Secure the harness assemblies with new cable straps (8).
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    Illustration 28	g06010090

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    Illustration 29	g06009843

24. Return left side console assembly (5) to the original upright position.

25. Install bolt (7) and bolt (6). Install bolt (4), not shown.
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    Illustration 30	g06009808

26. Install clip (2) and bolt (3).
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    Illustration 31	g06009804

27. Connect harness assemblies (1).

28. Fill the cooling system. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct filling procedure.

29. Charge the refrigerant. Refer to Service Manual, SENR5664, "All Products Air Conditioning and Heating Systems with R-134a for All AVSpare Machines" for the charging procedure. Refer to Special Publication, NEDG2500, "Air Conditioning Tools" for the correct tools.

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1. Install the seat.

2. Install the cab.