Pump Capacity – Check - MTU 20 V 4000 M93 x Operating Instructions Manual

7.18.4 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 in the intake connection of the pump.
2. Check pump pressure.
a) Switch on fuel treatment system (→ Page 65).
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. Checking pump pressure with reduced suction
a) Reduce suction pressure of pump to -0.8 bar with the shut-off 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).
Measured value (reduced suction condition).
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).
3 bar
2.6 bar
MS150048/04E 2013-07 | Task Description | 171