Testing Fuel Return Rate And Leakage - Komatsu Galeo PC800-8 Shop Manual

SEN00786-02

Testing fuel return rate and leakage

a If the engine has the intake manifold equipped
with the return block on it to return the fuel spill-
ing from the injector to the fuel tank, test the fuel
return rate and fuel leakage according to the fol-
lowing procedure.
a Testing tools for fuel return rate and leakage
Symbol Part No.
1 6151-51-8490
2 6206-71-1770
3 6217-71-8820
Commercially
4
available
J
Commercially
5
available
Commercially
6
available
Commercially
7
available
a Prepare an oil pan of about 20 l to receive the
fuel flowing out during the test.
16
Part name
Spacer
Joint
Joint
Hose (5 mm x 2 – 3 m)
Hose (15 mm x 2 – 3 m)
Measuring cylinder (2 l)
Stopwatch
1. Preparation work
1) Remove tube (3) between common rail (1)
and supply pump (2).
2) Insert spacer J1 on supply pump (2) side
and tighten the removed joint bolt again.
a Connect the return pipe to the fuel tank
again, too.
a Be sure to fit the gaskets to both ends of
the spacer.
3) Insert joint J2 on common rail (1) side and
tighten the removed joint bolt again.
a Be sure to fit the gaskets to both ends of
the joint.
30 Testing and adjusting
PC800, 850-8