Measuring Fuel Return Rate And Leakage - Komatsu PC210-8 Shop Manual

UEN00228-04
Measuring fuel return rate and
leakage
a Measuring tools for fuel return rate and leak-
age
Symbol Part No.
1 (Not set yet)
2 (Not set yet)
G
3 (Not set yet)
Commercially
4
available
k
Stop the machine on a level ground and
lower the work equipment to the ground.
1. Measuring return rate from supply pump
1) Open the engine hood and disconnect
return hose (1) of the supply pump.
2) Connect testing tool G1 to the supply
pump side and insert its end in measuring
cylinder G4.
3) Connect blocking tool G1 to the return
hose side to prevent the fuel from leaking.
4) Run the engine at low idle and measure
the return rate from the supply pump.
a If the return rate from the supply
pump is in the following range, it is
normal.
At low idle
During cranking
k
If the engine cannot be started, you
may measure the fuel return rate
while rotating the engine with the
starting motor. Do not rotate for
more than 20 seconds continu-
ously, however, for protection of
the starting motor.
18
Part name
Supply pump testing tool
Pressure limiter testing tool
Injector testing tool
Measuring cylinder
Max. 1,000 cc/min
Max. 140 cc/min
1
5) After finishing measurement, remove the
measuring tools and return the removed
parts.
2. Measuring leakage from pressure limiter
1) Open the engine hood and disconnect
return hose (2) of the pressure limiter.
2) Connect testing tool G2 to the pressure
limiter side and insert its end in measuring
cylinder G4.
3) Connect blocking tool G2 to the return
hose side to prevent the fuel from leaking.
4) Run the engine at low idle and measure
the leakage from the pressure limiter.
a If the leakage from the pressure lim-
iter is in the following range, it is nor-
mal.
At low idle
30 Testing and adjusting
0 cc (No leakage)
PC210, 230, 240-8