Engine Starting

Engine Starting

133

Illustration 133

Location of battery disconnect switch (A)

1. Turn the battery disconnect switch to the ON position. The battery disconnect switch is inside of the access door in front of the battery compartment on the left side of the machine.

134

Illustration 134

2. Move direction selector (2) to the NEUTRAL position. 4. Turn key start switch (3) to the ON position. The monitoring system performs an automatic self test. The action alarm sounds and all of the indicator lights come on briefly.

The indicator light for the parking brake will stay on until the parking brake is released. If the attachment controls are locked out, the indicator light for the hydraulic lockout control will stay on until the controls are unlocked. The indicator light for the auto kickdown will stay on until the function is unselected.

If the system detects a fault, check the electrical system. Make all of the necessary repairs before you start the engine.

5. Before you start the engine, check for the presence of bystanders or maintenance personnel. Ensure that all personnel are clear of the machine. Briefly sound the forward horn before you start the engine.

6. Turn start switch key (3) to the START position.

Crank the engine. Release the key when the engine starts.

NOTICE Do not crank the engine for more than 30 seconds. Allow the starter to cool for two minutes before cranking again. Turbocharger damage can result if the engine rpm is not kept low until the oil gauge display verifies that the oil pressure is sufficient.

Ether Starting Aid (If Equipped)

Ether Starting Aid – The machine may be equipped with an ether starting aid. The ether starting aid is continuously available to the engine for cold weather starting. The engine ECM will determine automatically when the premeasured amount of ether injects the engine air intake. This action will occur during the engine starting procedure. The indicator light indicates that the relay for the ether aid is being activated.

For starting below the approximate temperature of  1 C (30 F), the use of the ether starting aid is automatic. Continue the procedure for Engine Starting.

For starting below 18C (0F), the use of the cold weather starting aids is recommended. Lighter viscosity fluids, a jacket water heater, a fuel heater, or the heavy-duty starter may be required.

At temperatures below 23C10F), consult your Caterpillar dealer. For information on starting the engine in cold weather, refer to the Operation and Maintenance Manual, SEBU5898, “Cold Weather Recommendations for all Caterpillar Machines”.

Subsequent Engine Starting Procedures

NOTICE Keep engine speed low until the engine oil pressure registers on the gauge or the engine oil indicator light goes out.

If it does not register or the light does not go out within ten seconds, stop the engine and investigate the cause before starting again. Failure to do so, can cause engine damage.

1. Allow a cold engine to warm up at low idle for at least 5 minutes.

2. You can begin to operate the machine with a reduced load.

3. When the oil pressure reaches the normal operating range and the temperature gauge begins to move, you may operate the machine at full load.

4. Monitor lights and gauges (4) frequently during operation.

5. Check oil levels in the power train, the engine, and the hydraulic systems when the oil is at operating temperature. Maintain the oil levels to the FULL marks.

Engine and Machine Warm-Up

NOTICE Keep engine speed low until the engine oil pressure registers on the gauge or the engine oil pressure indicator light goes out. If it does not register or the light does not go out within ten seconds, stop the engine and investigate the cause before starting again. Failure to do so, can cause engine damage.

NOTICE Always run the engine at low idle for at least ten minutes before performing any other operations in cold conditions to protect your engine and to protect your transmission.

The engine may automatically change speeds when the machine is stationary and idling in cold ambient temperature for an extended time. This action is to: •Maintain desired coolant temperature.

•Maintain desired operation of engine systems.

•Maintain desired operation of the regeneration system.

During extended idling in cold ambient conditions, engine speed may operate between 1000 rpm and 1600 rpm. Operation at 1600 rpm is minimal and will only last for up to 20 minutes. The high exhaust system temperature indicator may also illuminate during extended idling conditions to signal that a low speed regeneration is in progress. A regeneration done in cold ambient extended idling conditions may activate below 30% soot level. A regeneration done in cold ambient extended idling conditions will typically last for 5-10 minutes.

After the engine has been started, allow the monitoring system to complete the self test.

1. Allow a cold engine to warm up at LOW IDLE for at least 5 minutes. To help the hydraulic components to warm up faster, engage the attachment controls and disengage the attachment controls.

2. You can begin to operate the machine with a reduced load.

3. When the engine coolant temperature reaches the normal operating range and no faults are present, you may operate the machine at full load.

4. Look at the indicators and the gauges frequently during operation. Refer to Operation and

Maintenance Manual, “Monitoring System”.

5. Check oil levels in the power train, the engine, and the hydraulic systems when the oil is at operating temperature. Maintain the oil levels to the FULL marks.

The hydraulic oil will warm up faster, if the dozer blade control is held in the CLOSED position. Hold the dozer in the CLOSED position for short periods of 10 seconds or less. This action will allow the hydraulic oil to reach relief pressure, which causes the hydraulic oil to warm up more rapidly.

Cycle all controls in order to allow warm hydraulic oil to circulate through all hydraulic cylinders and through all hydraulic lines.

Idling

When you idle the engine in order to warm up the engine, observe the following recommendations:

•Allow the engine to warm up for approximately 15 minutes when the temperature is higher than 0C (32F).

•Allow the engine to warm up for approximately 30 minutes or more when the temperature is below 0C (32F).

•More time may be required if the temperature is less than 18C (0F). More time may also be required if the hydraulic functions are sluggish.

Additional Low Idling Speed

Note: If the engine is running at low idle with the parking brake ON and the engine coolant temperature below 70 C (158.0F) for 10 minutes, the engine speed will automatically increase to 1000 RPM. This action increases the coolant temperature faster.