Komatsu ecot3 PC300LC-8 Shop Manual page 384

SEN02625-06
3) Start the engine and push up the track shoe
on the measurement side using work equip-
ment.
q When measuring the front circuit: Left
track shoe
q When measuring the rear circuit: Right
track shoe
k
Provide a working area of sufficient
space, as the raised track shoe will be
idly rotated.
4) Increase the hydraulic oil temperature to the
operating range.
5) Measure the pump discharge pressure and
LS valve output pressure (pressure at servo
piston inlet) at the same time after setting
following conditions with the engine running
at high idle.
q Working mode: P-mode
Work equipment, swing and travel: When
q
all levers are at neutral and when travel
lever is at half stroke (one side of travel is
at idle)
a Let the raised track shoe idly rotate, pay-
ing enough attention to the surroundings
for safety.
44
30 Testing and adjusting
a Measurement conditions and judgment
method:
When the ratio between the pump
discharge pressure and LS valve output
pressure (servo piston input pressure)
reaches the following values, both pres-
sures are judged normal.
Lever operating condition
All levers and
pedals in neutral
Pump dis-
charge pres-
sure
Almost the same
pressure
LS valve out-
put pressure
6) Remove the measurement tools after the
measurement, and make sure that the
machine is back to normal condition.
Travel lever at
half stroke posi-
tion (Travel with
no load)
Set measured
valve as 1
Approx. 3/5 of
above pressure
PC300, 350-8