Why is the fuel dispenser counting imprecise?

Possible fault sources:

a.Noticeable wear takes place inside flow meter due to rust corrosion

b.Flow meter aging

c.Leak occurs in the piston seal

d.O-ring at the sealing ring is damaged

e.Distribution valve is worn

f.Filth occurs at the distribution valve and chassis seal

Recommended solutions:

a.Check the moving parts of flow meter for wear intensity, and replace or grind them if they are worn or uneven

b.Replace the flow meter

c.Replace the piston

d.Replace the O-ring

e.Replace the distribution valve

f.Clean the contact surface of distribution valve and its bottom surface