Operational Checking Procedure for the Secondary Steering System Installed on R1700G Load Haul Dumps{4300} Caterpillar

Load Haul Dump:

R1700G (S/N: SBR1-590; 8XZ1-UP)

Introduction

This publication contains the information to test the secondary steering system on the R1700G Load Haul Dump. 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.

Read the entire Special Instruction. Understand the information before you perform any procedures. Understand the information before you order any parts.

ReferenceFor SBR machines refer to Disassembly and Assembly, KENR6271, "R1700G Load Haul Dump Vehicle Systems", "Steering Frame Lock - Remove and Install".

ReferenceFor SBR machines refer to Disassembly and Assembly, KENR6271, "R1700G Load Haul Dump Vehicle Systems", "System Pressure - Release".

ReferenceFor 8XZ machines refer to Disassembly and Assembly, RENR4675, "R1700G Load Haul Dump Vehicle Systems", "Steering Frame Lock Pin - Remove and Install".

ReferenceFor 8XZ machines refer to Disassembly and Assembly, RENR4675, "R1700G Load Haul Dump Vehicle Systems", "Hydraulic System Pressure - Release".

Important Safety Information

Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.

A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.

Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.

Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, a work method or operating technique that is not specifically recommended by Caterpillar is used, you must ensure that it is safe for you and for other people to use.

You should ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance or the repair procedures that are used.

Show/hide table

Personal injury or death can result from machine articulation or movement. Machine frames can move and a person can be crushed. Connect the steering frame lock between the front and rear frames before working on the machine. Before operating the machine, place the steering frame lock in the stored position. Failure to place the steering frame lock into the stored position before operating can result in loss of steering.

Show/hide table

Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

Parts List

Machine Preparation

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

2. Install steering frame lock.

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

4. Release the pressure in the hydraulic system.

Show/hide table



Illustration 1	g01251754

5. Install wood block (1) between the rear axle housing and the rear frame on both sides of the machine, as shown. This will prevent the rear axle from oscillating.

   Note: The blocks should be a neat fit.

Show/hide table



Illustration 2	g01763273

6. Raise the rear of the machine and place Tooling (C) under the machine in the position shown in Illustration 10.

7. Raise the front of the machine and place Tooling (A) and (B) under the machine in the position shown in Illustration 10.

Secondary Steering System Operational Testing Procedure

Show/hide table



Illustration 3	g01764973
View of the secondary steering pump showing the direction of oil flow when the machine is in a forward gear

1. Disconnect hose assembly (1) from the secondary steering pump.

Show/hide table



Illustration 4	g01764993
(1) Hose assembly (2) 7X-0325 Bolt (3) 8T-4223 Hard Washer (4) 229-5610 Manifold (5) 4J-0524 O-Ring Seal (6) 3K-0360 O-Ring Seal (7) 3E-6429 Flow Switch

2. Install the items listed in Illustration 8 to the secondary steering pump.

Show/hide table



Illustration 5	g01765033
The manifold and existing flow switch is located on the side of the transmission (8) Manifold (9) Existing 3E-6429 Flow Switch

3. Disconnect the wiring harness from existing 3E-6429 Flow Switch (9) .

4. Install Tooling (D) between the wiring harness that was disconnected in Step 3 and the new 3E-6429 Flow Switch that was installed in Step 5.

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

Show/hide table



Illustration 6	g01766953
(10) Primary steering indicator action lamp

6. Start the machine.

   Note: Primary steering indicator action lamp (10) should remain on.

7. Release the parking brake.

8. Select first gear forward. Slowly increase the engine speed to achieve a ground speed of five 5 km/h (3 mph).

9. When the secondary steering pump is operating correctly the 3E-6429 Flow Switch (normally open) will close. Primary steering indicator action lamp (10) should go off. This will verify if the secondary steering pump is providing sufficient oil flow to activate the secondary steering system.

10. Stop the engine.

Procedure to Remove Secondary Steering System Operational Testing Hardware

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

2. Release the pressure in the hydraulic system.

3. Remove Tooling (D) .

Show/hide table



Illustration 7	g01771019

4. Connect the wiring harness to existing 3E-6429 Flow Switch (9) .

Show/hide table



Illustration 8	g01764993
(1) Hose assembly (2) 7X-0325 Bolt (3) 8T-4223 Hard Washer (4) 229-5610 Manifold (5) 4J-0524 O-Ring Seal (6) 3K-0360 O-Ring Seal (7) 3E-6429 Flow Switch

5. Remove the items listed in Illustration 8 from the secondary steering pump.

Show/hide table



Illustration 9	g01764973
View of the secondary steering pump

6. Connect hose assembly (1) to the secondary steering pump.

Procedure to Prepare the Machine for Operation

Show/hide table



Illustration 10	g01763273

1. Raise the rear of the machine and remove Tooling (C) under the machine in the position shown in Illustration 10. Lower the machine.

2. Raise the front of the machine and remove Tooling (A) and (B) under the machine in the position shown in Illustration 10. Lower the machine.

Show/hide table



Illustration 11	g01251754

3. Remove blocks (1) from between the rear axle housing and the rear frame on both sides of the machine.

4. Check the hydraulic system oil level. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil Level - Check" for the machine that is being serviced.