INDICATOR-DIAL 4C8246 - Caterpillar

Machine Preparation for Troubleshooting
SMCS Code: 7600-035-ZM
Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the remote control system.
Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of fluids according to local regulations and mandates.
1. Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel. Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.2. Put the transmission control in the NEUTRAL position and any speed position. Engage the primary steering/transmission lock lever (STIC steer machines) or the transmission neutral lock (wheel steer machines).3. Engage the parking brake. Place wheel blocks in front of the wheels and behind the wheels.4. Lower the bucket or the attachments to the ground.5. Install the steering frame lock pin.6. Stop the engine.7. Move the hydraulic control lever several times through the full range of travel. This will release any pressure that may be present in the implement hydraulic system.8. Move the STIC steering control several times in both directions to release the pressure in the steering system.9. Release the braking system oil pressure.Reference: For the correct procedure to release the braking system oil pressure, refer to Systems Operation, Testing and Adjusting, "Braking System Pressure - Release" for the machine that is being serviced.10. Depress the breaker relief valve on the hydraulic tank in order to release the hydraulic oil pressure.11. The pressure in the hydraulic system has been released. Lines and components can be removed.General Troubleshooting Information
SMCS Code: 7600-035-ZMTroubleshooting the remote control system requires additional information from the machine Service Manual. The Electrical System Schematic, the Parts Manual and the Operation and Maintenance Manual are required support material.When the troubleshooting procedure instructs to REPAIR THE HARNESS, use the Electrical System Schematic in the machine Service Manual to trace the circuit. Perform continuity checks at the harness connectors to locate harness failures. At the connectors of the components, always check the ground circuit. Less than five ohms of resistance is required between the ground contacts of the connector and the frame ground. Excessive ground resistance, greater than five ohms, can cause incorrect diagnosing of problems.During