Warming The Engine; Heating The Hydraulic Oil - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

USE OF THE MACHINE

3.6.3 WARMING THE ENGINE

1 - After starting the engine, let it warm up before starting work.
2 - The ideal warming up of the engine is achieved with a constant speed of 1200 rpm, obtained with the hand
accelerator (see "3.3.6 pos. 7 - HAND ACCELERATOR").
IMPORTANT
Do not accelerate completely or abruptly until the coolant temperature has reached at least 60°C, which
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can be checked through the indicator provided on the dashboard.
3 - To reduce the time necessary to warm up the engine, accelerate now and then, up to maximum 1800 rpm.
4 - While warming up the engine, check the colour of the exhaust gas and be careful to anomalous noises or
vibrations; any abnormal situation must be examined thoroughly and its cause must be immediately
eliminated.

3.6.4 HEATING THE HYDRAULIC OIL

When warming up the engine, especially in the cold season, it is advisable to heat also the hydraulic system oil.
For this purpose, when the coolant temperature has reached approximately 60°C, proceed as follows:
1 - Press the front loader release button (LED off) (see "3.3.2 pos. 12 - SERVO CONTROL LOCKING
BUTTON").
2 - Lift and rotate the front bucket slowly and completely for several times.
3 - Lower the bucket to the ground and press the button again (LED on) to lock the control lever.
4 - Rotate the seat and release the backhoe control levers (see "3.1.2 BACKHOE LOCKS").
5 - Extend and retract the arm and the bucket completely for several times.
6 - Lock the levers again and rotate the seat to the driving position.
IMPORTANT
On machines equipped with backhoe servo controls, the movements of the levers are inhibited by the
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front loader locking button (see "3.3.2 pos. 12 - SERVO CONTROL LOCKING BUTTON").
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