Bringing The Machine Up To Operating Temperature - Case CX300C Operator's Manual

Bringing the machine up to operating temperature

NOTICE: Normal operating temperature of the hydraulic fluid is between 50 °C (122.0 °F) and 80 °C (176.0 °F), in
the middle of the temperature indicator.
After starting the engine and before using the machine, allow the hydraulic fluid to reach a temperature of 20 °C (68.0
°F), as indicated by the appearance of the first two segments on the hydraulic fluid temperature indicator. (Refer to
page 3-18).
Engine automatic warm-up
Once the engine has started, the warming-up process begins automatically. At first, engine speed is held at a pre-
determined, low level. As the temperature increases, engine speed increases in proportion. It is possible to interrupt
the warming-up process at any time, simply by manually changing engine speed or by operating one of the control
levers. Warming-up takes approximately 5 to 10 minutes.
Manual engine warm-up
With the engine throttle button a quarter open, start the engine and allow it to run approximately for 5 to 10 minutes.
When the coolant temperature reaches the second segment, carry out the hydraulic fluid warm-up procedure.
Hydraulic fluid warm-up
1. Turn the engine throttle button to half-open position. Push the function cancellation lever forward (safety bar in
outward position). Operate the bucket control slowly until the bucket is completely closed. Operate the arm re-
tracting control slowly until the arm is completely retracted and hold the control in this position for 30 seconds.
During this time the temperature of the hydraulic fluid will increase.
2. After 30 seconds, extend the arm completely and hold the control in this position a further 30 seconds.
3. Continue the arm extending and retracting procedure until the temperature rises (first two segments of the tem-
perature indicator).
4. Operate the travel and attachment controls three or four times to circulate the hydraulic fluid.
4 - OPERATING INSTRUCTIONS
4-9