Komatsu ecot3 PC300LC-8 Shop Manual page 397

30 Testing and adjusting
4) Continue this condition for 30 seconds, then
measure the oil leakage amount for 1 minute.
5) Remove the measurement tools after the
measurement, and make sure that the
machine is back to normal condition.
3. Measurement of oil leakage amount from
bucket cylinder
1) Start the engine and keep it running until the
hydraulic oil temperature rises to the oper-
ating range. Then extend the bucket cylinder
to the CURL stroke end.
k
Release the pressure remaining in the
piping referring to "Releasing remain-
ing pressure in hydraulic circuit".
2) Disconnect hose (3) on the cylinder head end
and block the hose end with a plate.
k
Be careful not to disconnect the hose
at the cylinder bottom end.
3) Run the engine at high idle and relieve the
bucket circuit by moving the bucket CURL.
4) Continue this condition for 30 seconds, then
measure the oil leakage amount for 1 minute.
5) After the measurement, make sure that the
machine is back to normal condition.
PC300, 350-8
4. Measurement of oil leakage amount from
swing motor
1) Disconnect drain hoses (4) and install the oil
stopper plug in the hoses.
2) Turn the swing lock switch to the ON position.
3) Run the engine at high idle, relieve the swing
circuit, and measure the oil leakage.
a Start measuring the oil leakage 30 sec-
onds after relieving is started and mea-
sure for 1 minute.
a After measuring 1 time, swing 180
then measure again.
4) After the measurement, make sure that the
machine is back to normal condition.
5. Measurement of oil leakage amount from
travel motor
1) Take off the travel motor cover.
2) Start the engine, and lock the travel.
k
Insert pin [1] between the sprocket and
the track frame to positively lock the
travel circuit.
SEN02625-06
, and
°
57