Komatsu Utility 69001, Operation & Maintenance Manual

Page: 128 / 276

OPERATION
OPERATION
3-74
STARTING IN COLD WEATHER 3
(Ambient temperature below 10°C)
NOTICE
q
When the hydraulic oil is at a low temperature, do not
carry out operations or move the levers suddenly.
Always carry out the warm-up operation. This will help
to extend the machine life.
Do not suddenly accelerate the engine before the
warm-up operation is completed.
q
Do not run the engine at low idle or high idle con-tinu-
ously for more than 20 minutes. This will cause leak-
age of oil from the turbocharger oil supply piping.
If it is necessary to run the engine at idle, apply a load
from time to time or run the engine at a mid-range
speed.
1. Turn fuel control dial (1) to the mid point between the low
idling speed (MIN) and full speed (MAX) to start up the
engine.
REMARK
The machine holds an engine revolution at 1200 rpm by means
of its engine cooling water warming-up function until after the
engine cooling water temperature reaches 30°C.
For more details on this function, see “STARTING IN COLD
WEATHER (3-70)“.
2. Blade control lever (2) to the full RAISE position, then hold
the lever in position, and operate slowly to the left tilt relief
and right tilt relief positions for 5 minutes.
3. Then operate blade control lever (2) to the full RAISE posi-
tion (up to the lever stroke end) and hold it in that position;
alternate the right and left TILT relief intermittently; lower
the blade to the ground by operating the control lever to the
LOWER position; operate the control lever to the FLOAT
position (up to the lever stroke end); and alternate right and
left TILT relief intermittently for five minutes.
4. Lower the blade to the ground, move the control lever fully
to the FLOAT position (lever stroke end) and hold the lever
in position for 1 minute. Next, release the lever and check
that it stays in the FLOAT position. After waiting for 3 min-
utes, return the lever to the HOLD position.
(A)
(B)
(C) RAISE
HOLD
LOWEW (D)
(E)
(F) FLOAT
LEFT TILT
RIGHT TILT