Komatsu PC200-8M0 Shop Manual page 376

SEN06127-00
2. Measuring return rate from supply pump
1) Open the right side cover of the engine,
and remove joint bolt (1) of the supply
pump (4). Then, disconnect return hoses
(2) and (3).
2) To prevent the fuel from flowing out, install
joint bolt [1], cap nut [2] and seal washer
[3] of tester kit G1 to the return hose (2).
3) Install joint G2 to supply pump (4) by using
joint bolt (1).
a Fit seal washer G2 to both sides.
3
Joint bolt:
19.6 to 29.4 Nm {2.0 to 3.0 kgm}
4) Connect test hose [4] of tester kit G1 to
joint G2.
a Arrange the hose run so that slack be
eliminated from the test hose. Put the
hose's top end in the oil receiving
container.
5) Start the engine. By using measuring cyl-
inder G4, measure the return rate for 1
minute with the engine speed at low idle.
a You may make the measurement for
20 seconds and multiply the mea-
sured result by 3.
a If the return rate from the supply
pump is within the following standard
range, it is normal.
24
30-101
101 Testing and adjusting, Part 1
Testing fuel discharge, return and leak amount
At low idle
During cranking
6) Remove the tools after finishing measur-
ing. Be sure to restore the machine.
a If you are going to measure the leak-
age from the pressure limiter or finish
t h e m e a s u r e m e n t : R e s t o r e t h e
machine.
a If you are going to measure the leak-
age from the injector: Leave the
machine as it is, and keep the top end
of the test hose put in the container.
3. Measuring leakage from pressure limiter
1) Open the right side cover of the engine,
and disconnect return hose (1) of the
pressure limiter.
a Disconnect hose clamp (2), and dis-
connect the hose at quick coupler (a).
PC200, 200LC, 220, 220LC-8M0
Max. 1,000 cc/min.
Max. 140 cc/min.