In order to prevent injury, make sure that no one is working on the machine or near the machine. Keep the machine under control at all times in order to prevent injury. Know the maximum height of the machine. Know the maximum width of the machine. Maintain proper clearance.
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| Illustration 1 | g01230527 |
Before you operate the machine, monitor message center (1) of the Caterpillar Monitoring System. Take action on any events that are displayed.
Note: In order to provide maximum sound suppression, keep all doors closed and keep all windows closed.
With the engine at low idle and with the oil at normal operating temperature, check the oil levels of the following systems: engine, transmission and torque converter, rear axle, steering and hydraulic. Refer to the Maintenance Section for information on checking the oil levels.
Adjust the operator's seat. Adjust the mirrors.
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Do not allow a companion to ride on the machine unless the companion is seated within the Rollover Protective Structure (ROPS) or Falling Object Protection Structure (FOPS) with the seat belt fastened. The companion must have the seat belt fastened while the machine is in operation. The operator of the machine is responsible for the safety of the companion. Personal injury or death may occur if the companion is not restrained and protected. |
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Fasten the seat belt.
Check the horn. Check the backup alarm. Check any other warning devices on the machine.
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| Illustration 2 | g00633669 |
Frequently observe messages, warnings, service lights, and all gauges (2). All gauges should be at normal operating range. The alert indicator, the action light and the action alarm should be off. Do not attempt to move the machine without normal brake air pressure.
Check the operation of the steering and the brakes. Refer to Operation and Maintenance Manual, "Secondary Steering - Test". Check the secondary brake. Refer to Operation and Maintenance Manual, "Braking System - Test". After the initial check, verify the operation of these systems while the machine maintains a low speed. Do not operate the machine if any discrepancies are found.
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| Illustration 3 | g00714607 |
Lower the body. Place hoist control lever (3) in the FLOAT position.
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| Illustration 4 | g01230543 |
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| Illustration 5 | g01230539 |
Retarder control lever (4) should be in the UP position and switch (5) for the Automatic Retarder Control should be in the ON position. Make sure that the Automatic Retarder Control (ARC) operates properly before you travel down a grade with a machine that is loaded. Test the ARC on a short grade before the machine is loaded.
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| Illustration 6 | g00633686 |
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| Illustration 7 | g00714610 |
Depress service brake control pedal (8). Disengage parking brake switch (6). Move transmission direction and speed control lever (7) to the desired direction and the desired gear.
Note: Only operate the controls if the engine is running.
Release service brake pedal (8) and depress accelerator pedal (9). Reduce engine speed when you are maneuvering in tight quarters or when you are driving over a rise. For further operating information, See Operation and Maintenance Manual, "Operation Information".
Machine Warm-Up
When the oil is allowed to warm-up gradually, the bearing components maintain optimum operating positions. High speeds during a cold start-up may decrease the durability of the bearing components. During warm-up, electronic control systems on the machine will restrict available transmission gears for certain cold oil temperature ranges.
The machine will not operate above FIRST gear until the temperature of the oil in the transmission is above 40 °C (104 °F). The machine will not operate above FIFTH gear until the temperature of the oil in the differential is above −4 °C (25 °F). The machine will not operate above SIXTH gear until the temperature of the oil in the differential is above 24 °C (75 °F). See Operation and Maintenance Manual, "Direction and Speed Control" for further information.
Warm-Up and Break-In of the Differential
Note: Correct oil levels are critical in the rear axle housing. Check the oil level prior to operation. Allow sufficient time for the oil to fill all of the compartments in the final drive housing. Allow sufficient time for the oil to fill all of the compartments in the differential housing.
Warm-Up
At start-up, operate the machine in fourth gear or in a lower gear until the oil is at 38°C (100°F). Allowing the oil to warm-up gradually permits bearing components to maintain optimum operating positions. High speeds during a cold start-up will cause the temperatures of the rotating components to be very different from the temperatures of the stationary components. High temperature differences within the bearing may result in less durability of the bearing component.
Break-In
The running surfaces of gears and of bearings are conditioned during break-in. Break-in brings bearing components to optimum operating positions.
Break-In
- For 15 to 20 minutes, load the machine with 60% to 75% of the capacity.
- Limit the top speed to fourth gear for approximately 15 to 20 minutes.
Placing significant load on bearing components at a lower speed creates a favorable condition of contact between the mating surfaces.
