Komatsu PC200-8M0, Shop Manual

Page: 396 / 1254

SEN06127-00
30-101
44
PC200, 200LC, 220, 220LC-8M0
101 Testing and adjusting, Part 1
Testing and adjusting oil pressure in pump LS control cir-
3. Measurement of LS-EPC valve output pres-
sure
1) Open the side cover of the pump room
and remove oil pressure pickup plug (7).
2) Install nipple M3 and connect them to oil
pressure gauge [2].
a
Use the oil pressure gauge of 6 MPa
{60 kg/cm
2
}.
3) Start the engine.
4) Run the engine at high idle, operate the
travel speed selector switch and travel
lever, and measure the output pressure in
each case.
a
Measuring condition and method of
judgment: If the output pressures are
the following value, the LS-EPC valve
is normal.
Note: Move the travel lever to a degree
that the PPC oil pressure switch is
turned ON (before the track starts
moving).
5) After finishing measurement, remove the
measuring tools and return the removed
parts.
Travel
speed Operation of
lever
Output pressure
Lo
Travel lever
in neutral
Approx. 2.9 MPa
{Approx. 30 kg/cm
2
}
Hi
Travel lever
operated a
little (Note)
0 MPa
{0 kg/cm
2
}