308C Excavator Machine Systems Caterpillar


Heating and Air Conditioning Unit - Remove

Usage:

308C KCX

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     138-7573     Link Bracket     2    
B     1U-9199     Lever Puller     1    

Start By:

  1. Remove the seat. Refer to Disassembly and Assembly, "Seat - Remove and Install".


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


------ WARNING! ------

Personal injury can result from contact with refrigerant.

Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.

Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.

Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.

Personal injury or death can result from inhaling refrigerant through a lit cigarette.

Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.

Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.

Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.

----------------------

------ WARNING! ------

At operating temperature, the engine coolant is hot and under pressure.

Steam can cause personal injury.

Check the coolant level only after the engine has been stopped and the fill cap is cool enough to touch with your bare hand.

Remove the fill cap slowly to relieve pressure.

Cooling system conditioner contains alkali. Avoid contact with the skin and eyes to prevent personal injury.

----------------------



    Illustration 1g00910757

  1. Disconnect harness assembly (1) .



    Illustration 2g00910764

  1. Remove socket head screws (2). Remove stop (3) for the seat.



    Illustration 3g00910807

  1. Slide support assembly (4) to the rear. Remove socket head screws (5) .



    Illustration 4g00910813

    Right top inside of cab

  1. Remove bolts (6). Remove bracket (7). Install Tooling (A) .



    Illustration 5g00910822

  1. Remove vents (8) .



    Illustration 6g00910831

  1. Remove screws (9). Remove duct assembly (10) .



    Illustration 7g00910857

  1. Install Tooling (B) on Tooling (A). Use Tooling (B) to lift frame assembly (11) out of the way.



    Illustration 8g00910901

  1. Remove bolts (13). Remove panel (12) .



    Illustration 9g00910922

  1. Remove screws (14). Remove panel (15) .



    Illustration 10g00911000

  1. Disconnect harness assembly (18). Remove duct (16) .

  1. Remove three bolts (17) .



    Illustration 11g00910993

  1. Remove bolts (20) from heater assembly. Remove cover (21). Remove duct (19) .



    Illustration 12g00911056

  1. Remove bolts (22). Remove access panel (23) .

    ------ WARNING! ------

    Personal injury can result from contact with refrigerant.

    Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.

    Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.

    Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.

    Personal injury or death can result from inhaling refrigerant through a lit cigarette.

    Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.

    Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.

    Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.

    ----------------------

  1. Recover the air conditioner refrigerant from the air conditioner system. The correct charge is 1 kg (2.2 lb). Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the procedure. Refer to Special Publication, NEDG5065, "Air Conditioning Tools" for the tools.



    Illustration 13g00911032

  1. Disconnect hose assemblies (24) for the air conditioner.

  1. Remove bolts (25). Remove clip (26) .

  1. Drain the coolant from the cooling system into a suitable container for storage or disposal. The capacity of the cooling system is approximately 15 L (4 US gal). Refer to Operation and Maintenance Manual, SEBU7613, "Cooling System Coolant (DEAC) - Change" or refer to Operation and Maintenance Manual, "Cooling System Extended Life Coolant - Change".



    Illustration 14g00911041

  1. Disconnect hoses (27) for the heater.



    Illustration 15g00911044

  1. Disconnect harness assemblies (28) from the heater assembly.

  1. Remove bolts (29) that hold the heater assembly to the frame.

  1. Remove heater assembly (30) from the machine.

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