The document provides instructions for removing and installing various components on a 320C excavator, including: 1) Actuator motors for air dampers, temperature controls, and other systems. Removal involves disconnecting linkages and harnesses, and installation connects these parts in reverse. 2) A fan speed control unit in the heating system case assembly. 3) An ambient air temperature sensor mounted on an upper frame plate. 4) A coolant temperature sensor in the engine compartment. The procedures provide illustrations and numbered steps for each removal and installation, with notes to properly align or secure parts. Begin and end steps reference removing and installing the storage box in the cab area.

1. Service Repair Manual
Models
320C and 320C L Excavator

2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR ANB
Configuration: 320C & 320C L Excavators ANB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320C Excavator Machine Systems
Media Number -RENR3826-16 Publication Date -01/11/2014 Date Updated -30/03/2016
i02333043
Actuator Motor (Air Distributor) - Remove and Install
SMCS - 7304-010-MQ; 7309-010-MQ; 7320-010-MQ
Removal Procedure
Start By:
a. Remove the storage box in the cab. Refer to Disassembly and Assembly, "Storage Box and
Covers (Cab) - Remove and Install".
Removal Procedure of the Actuator Motor for the Air Damper for the
Temperature Control
Illustration 1 g00699772
1. Disconnect harness assembly (1) from the actuator motor.
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3. Illustration 2 g00699776
2. Remove screw (2) in order to disconnect linkage (3).
Illustration 3 g00699782
3. Remove screws (4) from the actuator motor.
4. Remove actuator motor (5).
Illustration 4 g00699790
5. Remove linkage (6) from the actuator motor.
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4. Removal Procedure of the Actuator Motor for the Front Air Damper
Illustration 5 g00699809
1. Disconnect harness assembly (1) from the actuator motor.
Illustration 6 g00699811
2. Remove screw (4). Remove the cable strap for the harness assembly.
3. Remove screws (2) from the actuator motor.
4. Remove actuator motor (5).
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5. Illustration 7 g00699816
5. Remove linkage (3) from the actuator motor.
Removal Procedure of the Actuator Motor for the Fresh Air or Recirculated
Air Damper
Illustration 8 g00699825
1. Disconnect harness assembly (1) from the actuator motor.
Illustration 9 g00699828
2. Remove screw (2) from the linkage.
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6. Illustration 10 g00699833
The heating and air conditioning unit is removed for photographic purposes.
3. Remove screws (3) from the actuator motor.
4. Remove actuator motor (4).
Illustration 11 g00699850
5. Remove linkage (5) from the actuator motor.
Removal Procedure of the Actuator Motor for the Air Damper for the Rear
Window Defroster
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7. Illustration 12 g00699868
1. Remove air duct (1).
Illustration 13 g00700177
Illustration 14 g00699876
The heating and air conditioning unit is removed for photographic purposes.
2. Disconnect harness assembly (2) from the actuator motor.
3. Remove cam (3) from the actuator motor.
Illustration 15 g00700179
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8. Illustration 16 g00699881
The heating and air conditioning unit is removed for photographic purposes.
4. Remove screws (4).
5. Remove actuator motor (5).
Removal Procedure of the Actuator Motor for the Air Damper for the Front
Window
Illustration 17 g00699893
1. Disconnect harness assembly (1) from the actuator motor.
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9. Illustration 18 g00699902
2. Remove screws (2).
3. Remove actuator motor (3).
Illustration 19 g00699909
4. Remove linkage (4) from the actuator motor.
Installation Procedure
Installation Procedure of the Actuator Motor for the Air Damper for the
Temperature Control
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10. Illustration 20 g00699790
1. Install linkage (6) on the actuator motor.
Illustration 21 g00699782
2. Install actuator motor (5) on the heating and air conditioning unit.
3. Install screws (4) in the actuator motor.
Illustration 22 g00699776
Note: Make sure that the linkage is properly aligned in the air actuator.
4. Connect linkage (3). Install screw (2).
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11. Illustration 23 g00699772
5. Connect harness assembly (1) to the actuator motor.
Installation Procedure of the Actuator Motor for the Front Air Damper
Illustration 24 g00699816
1. Install linkage (3) on the actuator motor.
Illustration 25 g00699811
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12. Note: Make sure that linkage (3) is properly aligned with the air actuator.
2. Install actuator motor (5).
3. Install screws (2) in the actuator motor.
4. Install a new cable strap for the harness assembly. Install screw (4).
Illustration 26 g00699809
5. Connect harness assembly (1) to the actuator motor.
Installation Procedure of the Actuator Motor for the Fresh Air or Recirculated
Air Damper
Illustration 27 g00699850
1. Install linkage (5) on the actuator motor.
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13. Illustration 28 g00699833
The heating and air conditioning unit is removed for photographic purposes.
2. Install actuator motor (4).
3. Install screws (3) in the actuator motor.
Illustration 29 g00699828
4. Connect the linkage to the air actuator.
5. Install screw (2) in the linkage.
Illustration 30 g00699825
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14. 6. Connect harness assembly (1) to the actuator motor.
Installation Procedure of the Actuator Motor for the Air Damper for the Rear
Window Defroster
Illustration 31 g00699881
The heating and air conditioning unit is removed for photographic purposes.
1. Install actuator motor (5).
2. Install screws (4).
Illustration 32 g00699876
The heating and air conditioning unit is removed for photographic purposes.
Note: Make sure that the linkages for the air dampers are installed in the cam.
3. Install cam (3) on the actuator motor.
4. Connect harness assembly (2) to the actuator motor.
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15. Illustration 33 g00699868
5. Install air duct (1).
Installation Procedure of the Actuator Motor for the Air Damper for the Front
Window
Illustration 34 g00699909
1. Install linkage (4) on the actuator motor.
Illustration 35 g00699902
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16. 2. Install actuator motor (3).
3. Install screws (2).
Illustration 36 g00699893
4. Connect harness assembly (1) to the actuator motor.
End By:
a. Install the storage box in the cab. Refer to Disassembly and Assembly, "Storage Box and
Covers (Cab) - Remove and Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Oct 8 13:22:26 UTC+0800 2019
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17. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR ANB
Configuration: 320C & 320C L Excavators ANB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320C Excavator Machine Systems
Media Number -RENR3826-16 Publication Date -01/11/2014 Date Updated -30/03/2016
i01917758
Speed Control - Remove and Install - Blower Linear Control
SMCS - 7311-010-X9
Removal Procedure
Start By:
a. Remove the storage box in the cab. Refer to Disassembly and Assembly, "Storage Box and
Covers (Cab) - Remove and Install".
Illustration 1 g00699585
1. Disconnect harness assembly (1) from the fan speed control.
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18. Illustration 2 g00699588
2. Remove screws (2) from fan speed control (3).
3. Remove fan speed control (3) from the case assembly.
Installation Procedure
Illustration 3 g00699588
1. Install fan speed control (3) in the case assembly.
2. Install screws (2) into fan speed control (3).
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19. Illustration 4 g00699585
3. Connect harness assembly (1) to the fan speed control.
End By:
a. Install the storage box in the cab. Refer to Disassembly and Assembly, "Storage Box and
Covers (Cab) - Remove and Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Oct 8 13:23:21 UTC+0800 2019
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21. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR ANB
Configuration: 320C & 320C L Excavators ANB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320C Excavator Machine Systems
Media Number -RENR3826-16 Publication Date -01/11/2014 Date Updated -30/03/2016
i01933903
Temperature Sensor (Ambient Air) - Remove and Install
SMCS - 1928-010
Removal Procedure
Illustration 1 g00695941
1. Remove bolts (2) in order to remove plate (1). The weight of plate (1) is approximately
13 kg (29 lb).
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22. Illustration 2 g00698287
2. Disconnect harness assembly (3) from the ambient air temperature sensor.
Illustration 3 g00698264
3. Cut cable strap (4).
4. Remove ambient air temperature sensor (5).
Installation Procedure
Illustration 4 g00698264
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23. 1. Position ambient air temperature sensor (5) in the clip.
2. Install cable strap (4).
Illustration 5 g00698287
3. Connect harness assembly (3) to the ambient air temperature sensor.
Illustration 6 g00695941
4. Position plate (1) on the upper frame. The weight of plate (1) is approximately 13 kg
(29 lb).
5. Install bolts (2).
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Oct 8 13:24:17 UTC+0800 2019
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24. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR ANB
Configuration: 320C & 320C L Excavators ANB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320C Excavator Machine Systems
Media Number -RENR3826-16 Publication Date -01/11/2014 Date Updated -30/03/2016
i01790503
Coolant Temperature Sensor - Remove and Install
SMCS - 1906-010-H8
Removal Procedure
Start By:
a. Remove the storage box in the cab. Refer to Disassembly and Assembly, "Storage Box and
Covers (Cab) - Remove and Install".
Illustration 1 g00699601
1. Disconnect harness assembly (1).
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