Komatsu SAA6D140E-3 User Manual

140-3 SERIES
12-17
TESTING AND ADJUSTING CHECK FOR LEAKAGE IN FUEL SYSTEM
CHECK FOR LEAKAGE IN FUEL SYSTEM
With the fuel system, the high-pressure circuit is
under extremely high pressure, so if fuel leaks
when the engine is running, there is danger of
fire.
Check for fuel leakage as follows when
checking the fuel circuit or when equipment has
been removed and installed.
★ To make it easier to check for fuel leakage, wipe
the engine itself and the surrounding area clean
and remove all oil and grease before starting the
inspection.
1.
Spray the fuel supply pump, common rail, fuel
injector, and high-pressure piping connections
with a color checker (developing solution).
2.
Start the engine, run it at under 1000 rpm, and
when the speed stabilizes, stop the engine.
3.
Check the fuel piping and equipment for fuel
leakage.
★ Check the high-pressure circuit for fuel
leakage, particularly at the places sprayed
with color checker.
★ If there is fuel leakage, carry out repairs, then
repeat the check from Step 2.
4.
Start the engine and run it at low idling.
5.
Check the fuel piping and equipment for fuel
leakage.
★ Check the high-pressure circuit for fuel
leakage, particularly at the places sprayed
with color checker.
★ If there is fuel leakage, carry out repairs, then
repeat the check from Step 2.
6.
Start the engine and run it at high idling.
7.
Check the fuel piping and equipment for fuel
leakage.
★ Check the high-pressure circuit for fuel
leakage, particularly at the places sprayed
with color checker.
★ If there is fuel leakage, carry out repairs, then
repeat the check from Step 2.
8.
Start the engine, run it at high idling, then apply
load to the engine.
★ If this inspection is carried out with the
engine mounted on the machine, stall the
torque converter or relieve the hydraulic
pump.
9.
Check the fuel piping and equipment for fuel
leakage.
★ Check the high-pressure circuit for fuel
leakage, particularly at the places sprayed
with color checker.
★ If there is fuel leakage, carry out repairs, then
repeat the check from Step 2.
★ If no fuel leakage is found, the check is
complete.

Komatsu SAA6D140E-3 Specifications

General

Brand	Komatsu
Model	SAA6D140E-3
Category	Engine
Language	English