252-9310 Parking Brake Control Gp (Automatic) Custom Product Support Literature for the R1300G Load Haul Dump{1408, 4250} Caterpillar

Load Haul Dump:

R1300G (S/N: LJB1-1453)

Introduction

This publication contains the information for the installation of an automatic parking brake application system. This supplemental product support literature should be used with the appropriate Service Manual and the appropriate Parts Manual that is available for this standard machine.

Until the information that is contained in this document is understood, do not:

• Perform any procedure that is outlined in this publication

• Order parts that are outlined in this publication

Note: The optional ABA Transmission Switch Group must be installed with the Automatic Parking Brake system if not already installed on the machine. If the optional ABA Transmission Switch Group is not installed, stopping the engine or stalling the engine would not automatically engage the parking brake.

ReferenceSystems Operation Testing and Adjusting, RENR6937, "R1300G Load Haul Dump Braking System", "System Pressure - Release". This module is part of Service Manual, RENR6923 Volume 2.

ReferenceSystems Operation Testing and Adjusting, RENR6937, "R1300G Load Haul Dump Braking System", "Braking System Air-Purge". This module is part of Service Manual, RENR6923 Volume 2.

ReferenceOperation and Maintenance Manual, SEBU7329, "R1300G Load Haul Dump", "Towing Information". This manual is part of Service Manual, RENR6923 Volume 2.

Installation of the Pressure Switch

1. Move the machine to a hard, level location, that is away from operating machines and away from personnel.

2. Install the steering frame lock.

3. Lower the bucket to the ground.

4. Engage the parking brake.

5. Turn the battery disconnect switch to the OFF position.

6. Release the brake system pressure. Refer to Systems Operation Testing and Adjusting, RENR6937, "R1300G Load Haul Dump Braking System", "System Pressure - Release".

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Illustration 1	g01092907
Typical example

7. Remove cover (1) from the operator station.

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Illustration 2	g01092908
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Illustration 3	g01092911
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8. Pull up lever (2) located on the right side of suspension seat (3) .

9. Holding lever (2) upward, slide suspension seat (3) forward off suspension seat base (5). Remove suspension seat (3) .

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Illustration 4	g01093274
Typical example

10. Remove cover (4) and cover (6). Refer to Illustration 3 and Illustration 4.

Machines without Brake Pressure Gauges Installed

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Illustration 5	g02737378
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1. Remove 9S-4182 Plug (7) from 242-1941 Manifold (8). Discard 9S-4182 Plug (7) .

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Illustration 6	g02737398
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2. Install 3J-7354 O-Ring Seal (11) on 8T-2353 Adapter (12). Install 8T-2353 Adapter (12) .

3. Install 3J-1907 O-Ring Seal (9) on 183-5035 Pressure Switch (10). Install 183-5035 Pressure Switch (10) .

Machines with Brake Pressure Gauges Installed

Note: Steps 1 through 7 are not required for machines S/N:LJB1138-UP. The 4S-4857 Tee is installed as standard on these machines.

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Illustration 7	g02737436
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1. Disconnect 242-1940 Hose As (14) .

2. Remove 030-7946 Elbow (13) from 242-1941 Manifold (17). Discard 030-7946 Elbow (13) .

3. Remove 241-8295 Hose As (15). Discard 241-8295 Hose As (15) .

4. Remove 3J-7352 Connector (16) from 242-1941 Manifold (17). Discard 3J-7352 Connector (16) .

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Illustration 8	g02737536
Typical example

5. Install 3J-7354 O-Ring Seal (18) on 4S-4857 Tee (19). Install 4S-4857 Tee (19) .

6. Connect 242-1940 Hose As (14) to 4S-4857 Tee (19) .

7. Install new 252-9717 Hose As (20) between the rear brake pressure gauge and 4S-4857 Tee (19) .

Note: For machines S/N:LJB1138-UP the 9S-4182 Plug must be removed before installing 8T-2353 Adapter (23) .

8. Install 3J-7354 O-Ring Seal (18) on 8T-2353 Adapter (23). Install 8T-2353 Adapter (23) .

9. Install 3J-1907 O-Ring Seal (21) on 183-5035 Pressure Switch (22). Install 183-5035 Pressure Switch (22) .

Installation of the Wiring Harness

Note: Install the wiring with the electrical schematic. Refer to Illustration 11. Install all harnesses securely by using the cable ties listed in Table 1.

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Illustration 9	g02737597
View of the electronic transmission control with the 252-9309 Harness installed

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Illustration 10	g02737598
Typical view of the lines group (lower) with the 183-5035 Pressure Switch installed

1. Install wire EL709 from 252-9309 Harness (24) into pin 11 of Electronic Transmission Control J2 plug (26) .

2. Connect earth wire 202-BK from 252-9309 Harness (24) at location (A) .

3. Route 252-9309 Harness (24) from Electronic Transmission Control J2 plug (26) following existing lower cab part B harness (25) to the 183-5035 Pressure Switch (29) .

4. Connect 2-pin plug (28) from 252-9309 Harness (24) to the 183-5035 Pressure Switch receptacle (27) .

5. Install cover (6) .

6. Install suspension seat (3) .

7. Install cover (1) .

Installation of the Software

1. Turn the battery disconnect switch to the ON position.

2. Use Caterpillar Winflash Electronic Technician (ET) to flash the Software-Gp into the Electronic Transmission Control.

   Note: The new software is available in the form of a flash file from Cat Underground Mining through the Dealer Solution Network (DSN). Reference Custom Service Information, REHS0684 in the service request.

3. Cycle the battery disconnect switch to the OFF position and back to the ON position.

4. Purge the air from the braking system. Refer to Systems Operation Testing and Adjusting, RENR6937, "R1300G Load Haul Dump Braking System", "Braking System Air-Purge".

5. Check that the Automatic Parking Brake system operates correctly. Refer to ""Automatic Parking Brake System Operation" ".

Electrical System Schematic

Illustration 11	g01524317
View of the automatic parking brake system electrical schematic

Automatic Parking Brake System Operation

A Load Haul Dump machine equipped with the automatic parking brake system will automatically engage the parking brake under certain conditions. The system uses the Electronic Transmission Control to detect when all the following conditions are active for 3 seconds or more:

• Parking brake disengaged.

• Remote control switch is in the OFF position (if equipped).

• Ground speed is less than 5 km/h (3.1 mph).

• Engine rpm is between 550 rpm and 800 rpm.

• Neutralizer pedal released (foot off pedal).

• Service brake pedal released (foot off pedal).

When all the above conditions are continuously active for 3 seconds or more, the parking brake will automatically engage.

If the parking brake is automatically engaged, disengage the parking brake by cycling the parking brake switch from the OFF position to the ON position. Cycle back to the OFF position.

Note: The optional ABA Transmission Switch Group must be installed with the Automatic Parking Brake system if not already installed on the machine. If the optional ABA Transmission Switch Group is not installed, stopping the engine or stalling the engine would not automatically engage the parking brake.

Towing the Machine

The procedure for towing the Load Haul Dump machine is unaffected when the engine is not running. Refer to Operation and Maintenance Manual, SEBU7329, "R1300G Load Haul Dump", "Towing Information". When towing the machine with the engine running, adhere to at least two of the following conditions to prevent the parking brake from automatically engaging:

• Parking brake disengaged

• Maintain the engine rpm above 800 rpm