PROCEDURE
1 Prepare the overpressure safety valve.
1.1 Attach the overpressure safety valve (003, Figure 10-27) to the valve holder.
1.2 Tighten the overpressure safety valve (003).
1.3 Attach the valve holder (002) to the test bench (008) or to the HP oil pump (006).
2 Do a check of the sealing pressure.
2.1 Operate the test bench (008) or the HP oil pump (006) to increase the pressure
to 1150 bar.
2.2 Keep the pressure constant for one minute.
2.3 Make sure that there are no leaks.
3 Do a check of the operation pressure.
3.1 Operate the test bench (008) or the HP oil pump (006) to increase the pressure
until the overpressure safety valve (003) opens.
3.2 Make sure that the overpressure safety valve (003) opens at between 1200 bar
and 1350 bar.
4 Complete the test.
4.1 Operate the test bench (008) or open the valve (005) on the HP oil pump (006)
to release the pressure.
4.2 Remove the overpressure safety valve (003) from the valve holder (002).
5 Record the results in the Inspection Report.
NOTE: Unserviceable overpressure safety valves must be sent to the manufacturer, or
a WinGD authorized repair workshop for inspection and repair.
X72DF
AA00-5562-01AAA-360A-A
Maintenance Manual Fuel rail - do a check of the overpressure safety valve
Winterthur Gas & Diesel Ltd.
- 595 - Issue 002 2020-10
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