Komatsu Galeo PC800-8 Shop Manual page 341

30 Testing and adjusting
4) Connect test hose J4 to the end of joint J2.
a Bind the connecting part of the test hose
with a wire, etc. to prevent it from coming
off.
a The above is the preparation work for
testing the leakage from the pressure
limiter.
2. Testing leakage from pressure limiter
1) Lay test hose J4 so that it will not slacken
and put its end in the oil pan.
2) Set the machine monitor so that it can
measure the engine speed.
3) Start the engine and keep its speed equiva-
lent to the rated load (P mode and boom
RAISE relief).
4) After the engine speed is stabilized, test the
leakage in 1 minute with measuring cylinder
J6.
a You may test for 20 seconds and judge
by multiplying the result by 3.
a If the leakage from the pressure limiter is
in the following range, it is normal.
Engine speed (rpm)
Operation with rated
output
5) After finishing testing, stop the engine.
PC800, 850-8
Leakage (cc/min)
Max. 10
3. Testing return rate from injector
a Keep the hose on the pressure limiter side
connected and keep its end in the pan while
testing the return rate from the injector.
1) Install joint J3 and connect return hose (6)
for the fuel tank to test hose J5.
a Bind the connecting part of the test hose
with a wire, etc. to prevent it from coming off.
2) Lay test hose H4 so that it will not slacken
and put its end in the oil pan.
3) Set the machine monitor so that it can
measure the engine speed.
4) Start the engine, select working mode P,
turn the heavy lift switch ON, and relieve the
boom raise circuit.
SEN00786-02
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