PROCEDURE
Fig 10-3
Leakage on FLV and pipes (example)
001
002
003
004
006
005
007
008
Legend
001
HP fuel pipe to injection valve
005
Fuel rail
002
Screw
006
Fuel leakage pipe
003
Screw-in union
007
Screw-in union
004
Fuel leakage pipe
008
Flow limiting valve (FLV)
1
Do a check of the level switch LS3446A for free flow. If necessary, clean the bore of the
pipe of the level switch.
2
Carefully do a check of the temperature of the fuel leakage pipe (004,
) of each
flow limiting valve (FLV) (008) to find the leakage pipe that has a fuel flow.
NOTE:
There is a fuel flow in the leakage pipe that has a higher temperature than the
other leakage pipes.
NOTE:
As an alternative you can carefully open and close the screw-in union (003) of
each FLV a maximum of two turns to find the leakage pipe that has a fuel flow.
3
If there is a leakage pipe (004) that has a fuel flow, do as follows:
3.1
Make sure that the screws (002) are tightened correctly, refer to the Maintenance
Manual 8733-1.
3.2
On the fuel leakage pipe (004), carefully loosen the screw-in union (003) a
maximum of two turns.
3.3
Do a check for fuel flow.
3.4
If fuel continues to flow from the screw-in union (003), do as follows (an HP fuel
pipe (001) is defective):
3.4.1
Stop the engine.
3.4.2
Remove each of the HP fuel pipes (001) until you find the defective HP fuel
pipe (refer to the Maintenance Manual 8733-1).
3.4.3
Do a check for damage on the sealing face of the defective HP fuel pipe
(001). If you find damage, grind the sealing face (refer to the Maintenance
Manual 8733-1).
3.4.4
If the HP fuel pipe is defective, cut out the injection of the related cylinder
and replace the defective HP fuel pipe, refer to the Maintenance Manual.
3.4.5
Tighten the screw-in union (003).
3.4.6
Start the engine.
3.5
If no fuel flows from the screw-in union (003), tighten the screw-in union (003).
X72-B
AA00-0000-00AAA-311C-A
Operation Manual
Examine the FLV or fuel pipes for fuel leakage
Winterthur Gas & Diesel Ltd.
- 419 -
Issue 003 2021-12
