Maintenance
2745
−
1/A1
Winterthur Gas & Diesel Ltd.
2.
Removal
1) Stop the engine.
2) Open the indicator valve (3,
) to make sure that there is no pressure in the
compression chamber.
3) Remove the relief valve (2) from the adaptor (5).
3.
Blow-off pressure check
1) There are two alternative procedures to do a check of the relief valve (2).
3.1
Procedure One
To do a check of the relief valve (2) use the injector test bench (94272) and test and
calibration fluid (refer to the specification in
). You can also use a low viscosity oil
as a test fluid.
1) Read the instructions of the manufacturer’s manual for the test bench (94272,
).
2) Attach the valve holder (94272C), to the test bench (94272).
3) Attach the relief valve (2) to the valve holder (94272C).
4) Do a check of the blow
−
off pressure on the relief valve (2).
5) Make sure that the relief valve is set to blow off at 250 bar. This relates to a firing
pressure of between 176 bar and 180 bar.
6) Release the pressure in the test bench (94272).
7) Remove the relief valve (2) from the valve holder (94272C).
3.2
Procedure Two
1) Attach the relief valve (2) to the valve holder (94272C).
2) Connect the HP oil pump (94931) and the hose (94935) to the pressure
gauge (94934A).
3) Connect the pressure gage to the valve holder (94272C).
4) Close the relief valve (RV) on the HP oil pump.
5) Operate the HP oil pump (94931).
6) Do a check of the blow
−
off pressure on the relief valve (2).
7) Make sure that the relief valve is set to blow off at 250 bar. This relates to a firing
pressure of between 176 bar and 180 bar.
8) Open the relief valve (RV) on the HP oil pump to release the pressure in the
hose (94935).
9) Disconnect the hose and the HP oil pump from the relief valve (2).
10) Remove the relief valve (2) from the valve holder (94272C).
Relief Valve: Blow-off Pressure Check
2017
Содержание X35-B
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Страница 546: ...Woodward L Orange GmbH Porschestraße 8 D 70435 Stuttgart Tel 49 711 82609 0 Fax 49 711 82609 61 www lorange com ...