Komatsu Utility Avance WB91R-2, Operation & Maintenance Manual

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USE OF THE MACHINE
3.6.3 WARMING THE ENGINE
3.6.4 HEATING THE HYDRAULIC OIL
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 ac-
celerator (See “3.3.6 pos. 7 HAND ACCELERATOR).
IMPORTANT
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Do not accelerate completely or abruptly until the coolant temperature has reached at least 60°C, which
can be checked by means of 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 - During the warming up of the engine, check the colour of the exhaust gases and verify if abnormal noises or
vibrations can be noticed; any anomaly must be verified and its cause must be eliminated.
When warming up the engine, especially in the cold season, it is advisable to heat also the hydraulic system oil.
For this reason, when the coolant temperature has reached approximately 60°C, proceed as follows:
1 - Extract the safety pin of the front bucket control lever (See “3.1 SAFETY LOCKS”).
2 - Raise and rotate the front bucket slowly and completely for several times.
3 - Lower the bucket to the ground and lock the control lever.
4 - Rotate the seat, release the backhoe control levers (See “3.1 SAFETY LOCKS”).
5 - Extend and retract the arm and the bucket completely for several times.
6 - Lock the levers and rotate the seat to the driving position.
IMPORTANT
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If the machine is equipped with backhoe servo controls, always engage the control locking safety de-
vice by pressing the relevant switch, see “3.3.6.2 MACHINE CONTROLS (Version with servo controls)”
pos. 27.