7.19.4 Pump capacity – Check
WARNING
Fuels are combustible.
Risk of fire and explosion!
• Avoid open flames, electrical sparks and ignition sources.
• Do not smoke.
Pump capacity – Check
1. Install suitable pressure gauge at the neck of the intake side of the pump.
2. Check pump pressure.
a) Switch on fuel treatment system (→ Page 55).
Note: The pressure limiting valve at the pump might respond and open. Audible noise is caused by overflow-
ing fuel and can be disregarded.
b) Close ball valve at the outlet of the fuel treatment system.
c) Check pressure at the pressure gauge in the inlet to the fuel treatment system and note down.
3. Check pump pressure with reduced suction.
a) Reduce suction pressure of pump to -0.8 bar with the shutoff valve at the pump intake side.
b) Check pressure at the pressure gauge in the inlet to the fuel treatment system and note down.
c) Open ball valve at inlet and outlet of fuel treatment system.
4. Calculate wear limit.
Example:
Measured value (normal condition). 3 bar
Measured value (reduced suction condition). 2.6 bar
If the measured value (reduced suction condition) is 10% lower than the measured value (normal condition),
the wear limit is reached. Repair pump (contact Service).
M015590/06E 2014-03 | Task Description | 129
TIM-ID: 0000007740 - 008
To Next Page