Installing the 350-9038 Air Conditioner and Heater Installation Kit (Conversion){1802, 1805, 1808, 7174, 7304, 7320, 734D} Caterpillar

Compact Track Loader:

279C (S/N: MBT1499-UP)

289C (S/N: JMP1345-UP)

Multi Terrain Loader:

277C (S/N: JWF2336-UP)

287C (S/N: MAS1956-UP)

Skid Steer Loader:

246C (S/N: JAY4504-UP)

256C (S/N: DWS1581-UP)

262C (S/N: MST3521-UP)

Introduction

ReferenceOperation and Maintenance, SEBU8019-00, "246C, 256C, 262C, and 272C Skid Steer Loader"

ReferenceDisassembly and Assembly, KENR5116, "Machine Systems - 246C, 256C, 262C, and 272C Skid Steer Loaders"

ReferenceDisassembly and Assembly, KENR5114, "Engine Supplement - 246C, 256C, 262C, and 272C Skid Steer Loaders"

ReferenceOperation and Maintenance, SEBU8020-00, "277C, 287C, and 297C Multi Terrain Loader"

ReferenceDisassembly and Assembly, KENR5191, "Engine Supplement - 277C, 287C, and 297C Multi Terrain Loader"

ReferenceDisassembly and Assembly, KENR5198, "Machine Systems - 277C, 287C, and 297C Multi Terrain Loader"

ReferenceDisassembly and Assembly, KENR8832, "Machine Systems - 279C, 289C, and 299C Compact Track Loader"

ReferenceDisassembly and Assembly, KENR8828, "Engine Supplement - 279C, 289C, and 299C Compact Track Loader"

ReferenceOperation and Maintenance, SEBU8407, "279C, 289C, and 299C Compact Track Loader"

ReferenceTesting and Adjusting, SENR5664, "Air Conditioning and Heating R-134a - for All Caterpillar Machines"

This Special Instruction provides basic instructions for installing the 350-9038 Air Conditioner and Heater Installation Kit (CONVERSION) on the listed machines. Read the information that is provided in this publication before you begin the installation. Also, read the information in the service manual for your machine that is referenced in this instruction.

The 350-9038 Air Conditioner and Heater Installation Kit (CONVERSION)

Illustration 1	g02327673
The configuration of the 350-9038 Air Conditioner and Heater Installation Kit (1) Refrigerant Compressor Gp (2) Condenser Coil As (3) Refrigerant Accumulator Gp (4) Air Conditioner Gp (56) Relay Assembly that connects to AC-C10 Delphi relay base

Parts Information

Installation Instructions

During the installation of this kit, apply the following instructions:

• Use the standard torque for fasteners and for connectors unless a value is specified in the procedure.

• Lubricate O-ring seals with a mineral-based refrigerant oil that is compatible with the R134A refrigerant before you install the seals.

• Use a wrench to support the connectors when you torque the hose connections to the condenser coil to prevent damage to the condenser coil.

Raising the cab is necessary in order to install many of the component in this kit. Refer to Operation and Maintenance, "Tilting the Cab Upward". Refer to Operation and Maintenance, "Tilting the Cab Downward" for instructions.

Preparing for the Installation

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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand. Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.

1. Park the machine on a flat, level work surface. Engage the parking brake.

   Refer to Operation and Maintenance, "Parking" for instructions.

2. Remove the 258-4270 Cab Heater Gp from the machine by performing Step 2.a through Step 2.b.

   1. Disconnect the harness connector for the heater from the 348-4173 Heater and Air Conditioner Harness As .

   2. Disconnect the heater hoses from the heater inlet and the heater outlet on the heater coil. Clamp the heater hoses in order to minimize fluid loss. Retain the hose clamps for reinstalling the hoses to the air conditioning unit.
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   Illustration 2	g01622314
   (60) 266-3315 Bolt (61) 258-4042 Governor Pedal Gp (62) 8T-4138 Bolt (63) 8T-4205 Hard Washer (64) 258-4408 Insulation (65) 258-4270 Cab Heater Gp

   3. Remove the four bolts (60) that secure the heater to the frame. See Illustration 2.

      Retain the bolts for the reinstallation.

   4. Remove the three bolts (62) and the three hard washers (63) that secure the foot pedal (61) to the top of the heater. See Illustration 2.

      Retain the bolts and the washers for the reinstallation.

   5. Disconnect the wiring connection on the foot pedal. Remove insulation (64) and slide the foot pedal out of the floorplate.

   6. Remove the heater from the machine.
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   Illustration 3	g01622340
   (65) 258-4270 Cab Heater Gp (66) 6V-7357 Bolt (67) 357-8752 Duct As

   7. Remove the two bolts (66) that secure duct (67) to the heater. See Illustration 3.

      Retain the bolts for the reinstallation.

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   Illustration 4	g01622344
   (65) 258-4270 Cab Heater Gp (67) 357-8752 Duct As (68) 258-3727 Screw

   8. Position the heater with the duct upward. Remove the five screws (68) that secure duct (67) to the heater. See Illustration 4.

      Retain the screws and the duct for the reinstallation.

      Discard the heater.

3. Install the 258-4290 Air Conditioner Gp in the machine by performing Step 3.a through Step 3.e.
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   Illustration 5	g01622324
   (40) 258-4290 Air Conditioner Gp (67) 357-8752 Duct As (68) 258-3727 Screw

   1. Place duct (67) onto the air conditioner (40), as shown. See Illustration 5.

      Install the five screws (68) that were retained in order to secure the duct to the air conditioner.

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   Illustration 6	g01622327
   (36) 258-3792 Seal (40) 258-4290 Air Conditioner Gp (67) 357-8752 Duct As (66) 6V-7357 Bolt

   2. Position the air conditioner with the duct downward. Install the two bolts (66) that were retained in order to secure duct (67) to the air conditioner. See Illustration 6.

      Remove the protective paper strip from seal (36) and apply the seal around the opening in the top plate of air conditioner (40), as shown.

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   Illustration 7	g01622320
   (40) 258-4290 Air Conditioner Gp (60) 266-3315 Bolt

   3. Place air conditioner (40) in position inside the machine. Install the four bolts (60) that were retained in order to secure the air conditioner to the frame. See Illustration 7.
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   Illustration 8	g01622399
   (37) 258-3794 Insulation (40) 258-4290 Air Conditioner Gp (47) 258-4408 Insulation (61) 258-4042 Governor Pedal Gp (62) 8T-4138 Bolt (63) 8T-4205 Hard Washer

   4. Reposition foot pedal (61) and secure the foot pedal with the three bolts (62) and the three hard washers (63) that were retained. See Illustration 8.

      Remove the protective paper strip from insulation (47) and install the adhesive side to the floorplate around foot pedal (61) .

      Remove the protective paper strip from insulation (37) and apply the insulation to the floorplate, as shown.

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   Illustration 9	g01622533
   (59) 8T-0154 Hose Clamp (A) Heater inlet (B) Heater outlet

   5. Reconnect the hoses to the inlet and outlet ports on the rear of the air conditioning unit. Use the hose clamps (59) that were retained. See Illustration 9.

      Tighten the hose clamps to a torque of 4.5 ± 0.5 N·m (3.3 ± 0.4 lb ft).

Installing the 276-9875 Refrigerant Compressor Gp

1. Open the engine access door. Refer to Operation and Maintenance, "Engine Access Door" for operation instructions.

2. Tilt the radiator. Refer to Operation and Maintenance, "Radiator Tilting" for operation instructions.

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Illustration 10	g01453922
(116) 258-2443 Belt Guard (117) 101-2867 Hard Washer (118) (119) 270-9442 Screw

3. Remove the four screws (118) and the four hard washers (117). Loosen the two screws (119). Then, slide guard (116) upward and remove the guard. See Illustration 10.

   Retain the guard, the screws, and the hard washers for the reinstallation.

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Illustration 11	g01453988
(120) (122) 266-3315 Bolt (121) 258-3532 Bracket As (123) 4D-6466 Clip

4. Perform Step 4.b through Step 4.d to remove the fuel/water separator from the frame temporarily.

   Note: Do not disconnect the hoses.

   1. Remove the cable strap that secures the electrical connector to the support clip. Then, unplug the electrical connector from the 348-4171 Platform Harness As .

   2. Remove bolt (122) to disconnect clip (123) from the rear tower plate temporarily. See Illustration 11.

      Retain the bolt for the reinstallation.

   3. Remove the two bolts (120) to disconnect bracket (121) from the rear tower plate temporarily. Retain these bolts for the reinstallation.

   4. Then, place the bracket with the fuel/water separator on the floor of the engine compartment.

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Illustration 12	g01454537
(124) 8T-4192 Bolt (125) 8T-4223 Hard Washer

5. Remove the three bolts (124) and the three hard washers (125) that are shown in Illustration 12.

   Discard the bolts and the hard washers.

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Illustration 13	g01622747
(1) 4P-7429 Clip (12) 8T-4223 Hard Washer (13) 8T-4183 Bolt (34) 280-8395 Bracket

6. Install bracket (34). Use the three new bolts (13) with three new washers (12) for installing the bracket. See Illustration 13.

   Note: Install clip (1) with the installation of the front bolt and washer. Orient the clip, as shown.

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Illustration 14	g01622750
(7) 8T-4121 Hard Washer (9) 8T-4195 Bolt (22) 315-7790 Plate (38) 258-4262 Hose As (41) 258-4304 Hose As (51) 276-9875 Refrigerant Compressor Gp

Note: Perform Step 7.a and Step 7.c before you install the compressor in the machine.

7. Install hoses (38) and (41) to compressor (51) per Step 7.b through Step 7.c. Refer to Illustration 14.

   1. Connect hose (38) to the suction port or the compressor.

   2. Connect hose (41) to the discharge port or the compressor.

   3. Install support (22) in order to hold the hoses in place. Install the support with bolt (9) and hard washer (7) .

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Illustration 15	g01622757
(7) 8T-4121 Hard Washer (8) 8T-4133 Nut (10) 8T-4196 Bolt (33) 258-2466 Bracket (51) 276-9875 Refrigerant Compressor Gp

8. Install bracket (33) to compressor (51). Use two bolts (10), four washers (7), and two nuts (8), as shown. See Illustration 15.

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Illustration 16	g01622764
(7) 8T-4121 Hard Washer (8) 8T-4133 Nut (10) 8T-4196 Bolt (14) 8T-6685 Bolt (23) 113-0693 Lockwasher (34) 280-8395 Bracket (51) 276-9875 Refrigerant Compressor Gp

9. Install compressor (51) onto bracket (34). Use bolt (14), three hard washers (7), and nut (8) in order to secure the compressor to the top of bracket (34). See Illustration 16.

   Note: Insert bolt (14) from the front of bracket (34) so that nut (8) is installed on bolt (14) from the rear of bracket (34). Only hand tighten nut (8) .

   Note: Loosely route the hoses toward the front of the machine between the engine and left wall of the engine compartment.

   Then, install bolt (10), lock washer (23), and hard washer (7) in order to secure the compressor onto the bottom of bracket (34). Only hand tighten bolt (10) .

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Illustration 17	g01622769
(1) 4P-7429 Clip (20) 7K-1181 Cable Strap (150) 258-4115 Engine Wiring Gp

10. Secure the engine harness (150) to clip (1) with a cable strap (20). See Illustration 17.

11. Connect the electrical connector from the compressor to connector E-C16 on the 258-4115 Engine Wiring Gp . See Table 3.
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    Table 3

    Connector E-C16
    Pin	Wire Color	Wire Number
    1	Pink	E554-E9
    2	Black	200-E36

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Illustration 18	g01622772
(8) 8T-4133 Nut (10) 8T-4196 Bolt (35) 258-3539 V-Belt

12. Install belt (35). Move the compressor for the air conditioner until the correct belt tension is achieved. See Illustration 18.

    Refer to Operation and Maintenance, "Belts - Inspect/Adjust/Replace" for the proper belt tension.

    Tighten bolt (10) in order to maintain belt tension. Then, tighten the nut (8) .

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Illustration 19	g01453922
(116) 258-2443 Belt Guard (117) 101-2867 Hard Washer (118) (119) 270-9442 Screw

13. Reinstall belt guard (116) with the screws and the hard washers that were retained in Step 3. Also, tighten screws (119). See Illustration 19.

14. Reinstall the fuel/water separator that was removed in Step 4. Reconnect the electrical connector to the 258-4108 Chassis Harness As and secure the electrical connector with a cable strap. See Illustration 11.

Installing the 186-6190 Refrigerant Accumulator Gp

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Illustration 20	g01454508

1. Remove the two existing 266-3315 Bolts that are installed in the lower frame. See Illustration 20.

   Discard the two existing bolts.

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Illustration 21	g01622782
(46) 258-4388 Bracket As (50) 266-3315 Bolt

2. Install bracket (46) on the left wall of the lower frame. Use the two new bolts (50) for installing the bracket. See Illustration 21.

   Note: Apply sealant (52) to the threads of the new bolts before you install the bolts.

   Tighten the bolts to a torque of 15 ± 3 N·m (11 ± 2 lb ft).

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Illustration 22	g01622791
(5) 5P-0802 Seal (21) 101-8296 Clip

3. Install a 150 mm (5.9 inch) length of seal (5) to the concave surface inside each of the two clips (21). Install the seals by removing the protective strip from the back of the seals and by pressing the seals to the clips. See Illustration 22.

   Note: Make sure that the inside of the clips is clean and free of oil before you install the seals.

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Illustration 23	g01622800
(5) 5P-5924 Seal (7) 8T-4121 Hard Washer (9) 8T-4136 Bolt (21) 101-8296 Clips (27) 186-6190 Refrigerant Accumulator Gp (46) 258-4388 Bracket As

4. Place clips (21) around accumulator (27) so that the two clips encircle the body of the accumulator. Then, mount the clips with the accumulator to the bracket (46). Use two bolts (9) and two hard washers (7). See Illustration 23.

   Note: Only hand tighten the bolts.

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Illustration 24	g01622807
(X) 32° Angle (9) 8T-4136 Bolt (15) 9X-7378 O-Ring Seal (19) 9X-7383 O-Ring Seal (21) 101-8296 Clip (25) 149-6371 Pressure Switch (27) 186-6190 Refrigerant Accumulator Gp (38) 258-4262 Hose As (43) 258-4309 Hose As

5. Make the hose connection to the inlet of the accumulator "side port". Install the end of hose (43) with the 90° coupling to the inlet or the compressor "side port". Use an O-ring (19) in this connection. See Illustration 24.

   Note: Hose (43) connects the outlet of the air conditioning unit to the inlet or the accumulator. Refer to Illustration 30.

   Route the free end of hose (43) toward the front of the machine for connection to the air conditioning unit.

6. Make the hose connection to the outlet of the accumulator "bottom port". Install the free end of hose (38) with the pressure switch port to the outlet port. Use an O-ring (19) in this connection.

   Note: Hose (38) connects the outlet of the accumulator to the suction port of the compressor. Refer to Illustration 30.

   Install pressure switch (25) in the pressure switch port in hose (38). Use an O-ring (15) in this connection. Tighten the pressure switch to a torque of 8 ± 1.5 N·m (6 ± 1 lb ft).

7. Orient the inlet of the accumulator at a 32° angle, as shown. See Detail A in Illustration 24.

   Then, tighten bolts (9) in order to secure the accumulator within clips (21) .

Installation of the 266-2425 Refrigerant Condenser Gp

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Illustration 25	g01622823
(4) 5C-9553 Bolt (11) 8T-4205 Hard Washer (44) 258-4380 Bracket As (49) 266-2425 Refrigerant Condenser Gp

1. Assemble bracket (44) onto condenser (49). Use two bolts (4) and two hard washers (11). See Illustration 25.

   Note: Only hand tighten the bolts.

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Illustration 26	g01622825
(4) 5C-9553 Bolt (11) 8T-4205 Hard Washer (39) 258-4284 Bracket As (45) 258-4386 Bracket As (49) 266-2425 Refrigerant Condenser Gp

2. Assemble bracket (45) and bracket (39) onto compressor (49), as shown. See Illustration 26.

   Use two bolts (4) and two hard washers (11) for each bracket.

   Note: Only hand tighten the bolts.

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Illustration 27	g01622829
(4) 5C-9553 Bolt (11) 8T-4205 Hard Washer (24) 115-1615 Relay As

3. Assemble relay (24) onto condenser (49). Use one bolt (4) and one hard washer (11). See Illustration 27.

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Illustration 28	g01622830
The hydraulic tank is not shown in the lower view of this illustration for clarity. (7) 8T-4121 Hard Washer (9) 8T-4136 Bolt (39) 258-4284 Bracket As (44) 258-4380 Bracket As (45) 258-4386 Bracket As (49) 266-2425 Refrigerant Condenser Gp (126) 8T-4196 Bolt (127) 8T-4121 Hard Washer (128) 258-2981 Bracket As (129) 258-2991 Bracket As

4. Install condenser (49) into the machine. Use two bolts (9) and two hard washers (7) in order to secure bracket (39) and bracket (45) to the frame. See Illustration 28.

   Use the four existing bolts (126) and the four existing hard washers (127) in order to secure bracket (44) to the frame.

   Note: Bracket (44) is installed in tandem with existing brackets (128) and (129), which are part of the 258-2434 Hydraulic Tank and Mounting Gp . Use the existing four bolts (126) and the four hard washers (127) for installing bracket (44) .

   Then, tighten the bolts (4) that are used to assemble the three brackets to the condenser.

   Note: These bolts were hand tightened in Step 1 and Step 2.

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Illustration 29	g01623635
(3) 4K-8864 Clip (4) 5C-9553 Bolt (6) 6D-4246 Clip (11) 8T-4205 Hard Washer (151) 348-4173 Heater and Air Conditioner Harness As

5. Secure the existing 348-4173 Heater and Air Conditioner Harness As (151) to the rear of the condenser. See Illustration 29.

   Use two clips (3), one clip (6), three bolts (4), and three hard washers (11), as shown.

Air Conditioner Hose Connections

Illustration 30	g01622832
This view shows the connections of the air conditioner hoses. (15) 9X-7378 O-Ring Seal (16) 9X-7380 O-Ring Seal (17) 9X-7381 O-Ring Seal (18) 9X-7382 O-Ring Seal (19) 9X-7383 O-Ring Seal (25) 149-6371 Pressure Switch (27) 186-6190 Refrigerant Accumulator Gp (32) 236-6923 Pressure Switch (38) 258-4262 Hose As (40) 258-4290 Air Conditioner Gp (41) 258-4304 Hose As (42) 258-4308 Hose As (43) 258-4309 Hose As (49) 266-2425 Condenser Coil As (51) 276-9875 Refrigerant Compressor Gp

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Illustration 31	g01622835
The heater hoses are not shown in this illustration for clarity. (2) 3S-2093 Cable Strap (17) 9X-7381 O-Ring Seal (18) 9X-7382 O-Ring Seal (31) 246-9039 Information Plate (42) 258-4308 Hose As (43) 258-4309 Hose As

1. Make the hose connections to the air conditioning unit. See Illustration 30 and Illustration 31.
   • Install the end of hose (42) with the air conditioning charging port to the inlet tube. Use an O-ring (17) in this connection. Then, install the end of hose (42) with the 90° coupling to the condenser outlet of the coil. Use an O-ring (16) in this connection.

   • Install the free end of hose (43) to the outlet tube. Use an O-ring (18) in this connection. Install instruction plate (31) near the air conditioning charging port on hose (43). Use a cable strap (2) in order to install the instruction plate.

2. Install the free end of hose (41) to the condenser inlet of the coil. Use an O-ring (17) in this connection. See Illustration 30.

   Install pressure switch (32) in the pressure switch port in hose (41). Use an O-ring (15) in this connection. Tighten the pressure switch to a torque of 8 ± 1.5 N·m (6 ± 1 lb ft).

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Illustration 32	g01622836
This view shows the components that are used to secure the air conditioner hoses. (2) 3S-2093 Cable Strap (26) 178-3620 Strap (28) 132-5789 Clip (38) 258-4262 Hose As (41) 258-4304 Hose As (42) 258-4308 Hose As (43) 258-4309 Hose As (50) 266-3315 Bolt

3. Secure the air conditioner hoses per instructions in Table 4.
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   Table 4

   Location	Action Refer to Illustration 32.
   (A)	Secure hose (38) to hose (41) with one strap (26). Install one cable strap (2) in order to secure both hoses to the 258-4192 Cable Gp .
   (B)	Secure hose (38) to the 258-3254 Hose As with one strap (26).
   (C)	Secure hose (42) to both of the heater hoses with one strap (26).
   (D)	Secure hose (43) to hose (42) and to both heater hoses with one strap (26). Then, tie the strap to the side wall with one tie anchor (28) and one bolt (50). See Illustration 33.

Illustration 33	g01622837
View of Area S in Illustration 32 that shows the details for securing the hoses (6) 6D-1641 Clip (26) 178-3620 Strap (28) 204-8000 Mount (42) 258-4308 Hose As (43) 258-4309 Hose As (50) 266-3315 Bolt

Completing the Installation

1. Install rocker switch (48) per Steps 1.a through 1.c.
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   Illustration 34	g01367211
   (74) 258-4004 Panel (RH) (75) 258-4299 Air and Temperature Control Gp (76) 109-2356 Plug

   1. Unseat the 258-4299 Air and Temperature Control Gp (75) from the 258-4004 Panel (RH) (74). Remove the 109-2356 Plug (76). See Illustration 34.
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   Illustration 35	g01367215
   (48) 266-0299 Rocker Switch (75) 266-2430 Air and Temperature Control and Wiring Gp

   2. Install rocker switch (48) into control group (75). See Illustration 35.

      Locate the harness connector inside the 258-4004 Panel (RH) (74). Plug the harness connector into the back of rocker switch (48) .

   3. Snap control group (75) back into the 258-4004 Panel (RH) (74) .

2. Connect the components that were installed to the existing 348-4173 Heater and Air Conditioner Harness As per the instructions in Table 5.
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   Table 5

   348-4173 Heater and Air Conditioner Harness As See Illustration 36.
   Connector	Wire Code	Instructions
   AC-C2 2-Pin Plug	514 PU 200 BK	Connect to the 2-pin receptacle for the right fan on condenser (49).
   AC-C3 2-Pin Plug	514 PU 200 BK	Connect to the 2-pin receptacle for the left fan on condenser (49).
   AC-C10 Delphi Relay Base	A510 OR C510 WH E554 PK 124 GN	Connect to relay assembly (56) which is mounted on the side sheet. Use two each of the following: 5C-2890 Nuts , 8T-4138 Bolts , and 9X-8256 Washers . Refer to Illustration 1.
   AC-C5 2 Position Delphi Plug	597 PU 519 PK	Connect to pressure switch (32) which is installed in hose (41) at the inlet of the condenser.
   AC-C6 Delphi Relay Base	125 OR 520 WH 200 BK 514 PU	Connect to relay assembly (32) which is mounted on condenser (82).
   AC-C8 2-Pin Plug	510 OR 597 PU	Connect to pressure switch (25) which is installed in hose (38) at the outlet of the accumulator.
   AC-C9 8-Pin Plug	200 BK A523 PU 124 GN 515 GY 516 GN 517 BU 520 WH 519 PK	Connect to the air conditioning unit (68).

3. Ensure that the harness connections that are listed in Table 6 have been made.
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   Table 6

   348-4173 Heater and Air Conditioner Harness As See Illustration 36.
   Connector	Wire Code	Connection
   AC-C1 12-Pin Plug	200 BK A523 PU 124 GN 515 GY 516 GN 517 BU 520 WH	Connector HV-C1 for the existing 266-2430 Air and Temperature Control and Wiring Gp 200-HV1 BK A523-HV2 PK 124-HV3 GN 515-HV4 GY 516-HV5 GN 517-HV6 BU 520-HV7 RD
   AC-C7 6-Pin Receptacle	124 GN A510 OR 125 OR C510 WH E554 PK	Connector C-C8 in the existing 348-4170 Cab Harness As 124-C145 GN 125-C144 OR A510-C26 OR C510-C27 WH E554-C136 PK
   AC-T1 Ground Ring Terminal	200 BK	Connect to ground stud

4. Reinstall all components that were temporarily removed in order to facilitate the installation of this kit.

Illustration 36	g02329744
Location of connectors for the 348-4173 Heater and Air Conditioner Harness As (151)

Charging the Air Conditioner System

1. Use the procedure from Testing and Adjusting, SENR5664, "Complete Charge of the System from a Refrigerant Tank with a Scale" to charge the air conditioner system. This procedure is part of the Testing and Adjusting, SENR5664, "Air Conditioning and Heating R-134a for All Caterpillar Machines". This procedure can be obtained through the normal literature distribution system. This procedure can also be found on the Caterpillar Service Information System (SIS).

   Note: Charge the system with 1.27 kg (2.8 lb) of R-134a refrigerant. Also add 80 cc (4.9 cubic inch) of 228-7840 Air Conditioner Oil .

Enabling Air Conditioning in Electronic Control Module (ECM)

The air conditioning will need to be installed through Electronic Technician (ET) on machines that have ECM 361-3092 Machine Software Gp or earlier. Refer to Illustration 37 and Illustration 38 below for installation selections.

Illustration 37	g02338658

Illustration 38	g02338659

Checking the Installation

1. Check the cooling system level. Refer to "Cooling System Level-Check" in the Operation and Maintenance manual for the machine.

2. Start the engine.

3. Stop the engine.

4. Check the hoses and check the fittings for leaks.

5. Start the engine.

6. Check the air conditioner for proper operation.

Appendix

Instructions for Using Pressure Sensitive Adhesive

Note: The temperature of the adhesive and the temperature of the surface must be between 20 °C (68 °F) to 38 °C (100 °F). The surface must be smooth, clean, and dry.

1. Clean the surface by wiping the surface with a 50/50 mixture of isopropyl alcohol and water. Allow the surface to dry completely.

2. Remove the protective paper from the seal and press the seal in position.

3. Use a roller or a similar device and apply a minimum of 103 kPa (15 psi) over the entire surface in order to bond the adhesive to the surface.

   Note: Pay special attention to the edges and to the corners in order to ensure that these areas are bonded securely. Avoid conditions that would apply stress to the bond for 24 hours after installation.

Service Parts