Maintenance of diesel fuel injection pump test bench

(I) Maintenance and Maintenance of Fuel System:
1. Fuel oil in the fuel tank should be replaced with new oil every 800 hours of operation or after 500 pumps are commissioned;
2. The hose clamps at each coupling must be properly set and clamped to prevent oil leakage and air ingress.
3. The coarse filter is cleaned every 800 hours of operation or after 500 pumps are commissioned;
4. After the pressure regulator valve handwheel rotates left or right, it must not be rotated to avoid damaging the pressure regulator valve.
(II) Adjustment of Standard Injector
In order to ensure the accuracy of the test bench, PJ-40 checker is used to check the standard fuel injector regularly to check if the opening pressure is correct and the standard pressure is 17.5+0.2 MPa. Check the flow uniformity of the injector.
(III) Inverter periodic inspection
Inverter regular maintenance and inspection, to ensure that the host more stable and safe operation, pay attention to check the inverter must be powered off. After the AC power is cut off, before the inverter’s “charge” indicator goes out, the capacitor is still not fully discharged. This is to avoid touching the electrical equipment. Please wait until the indicator light goes out before checking.
Inspection item Inspection item Countermeasure
External terminals, frequency converter
Is there any noise or vibration during the operation of fixing screws and connectors?
(Generally after 20,000 hours of cumulative operation)
Heat sink Whether there is accumulation of dust and impurities Remove with air gun with pressure 4-6Kg/cm2
Printed circuit board Is there any accumulation of oil in the conductive metal?
Cooling fan noise or vibration during operation
(after 20,000 hours of cumulative operation) Replacement
Power components Whether there is accumulation of dust and impurities Remove with air gun with pressure 4-6Kg/cm2
Does the capacitor have any discoloration or abnormal odor? Replace the capacitor
Under its inspection item:
(D) Couplings are regularly checked at the same
Due to long-time operation, check the joint joint screws and shrapnel for looseness or breakage to ensure the safety of the host.

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