Kohler Lombardini LDW FOCS 502 Euro 2, Service Manual

Page: 48 / 98

48
A
H
C
G
F
E
D
B
H
C
B
L
A
58
59
6
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
6.2.8 Check and overhaul of the fuel pump
Disassemble the oil pump before checking or
overhauling. See “Disassembling the oil pump” for the
correct procedure.
1. Remove the plate ( A ).
2. Remove the O-ring ( B ).
3. Remove the sealing ring ( C ) from the flange and clean
the seat.
4. Unscrew the oil ( D ) and extract the gasket ( E ), the
spring ( F ) and the valve ( G ).
5. Disassemble the rotors ( H ).
6. Blow compressed air into the valve seat to clean it.
7. Thoroughly clean all the components.
8. Measure the length of the spring (
F ).
If the length of the spring is not between 27.50 and
27.75mm, replace it with an original spare.
9. Replace the valve ( G ), the spring ( F ), the gasket ( E ) and
the plug (
D
).
10. Fill the sealing ring ( C ) with grease and lubricate the
rim with oil.
11. Mount the new sealing ring ( C ) using a special tool.
Important
• Given the particular function played by this sealing ring, it
is important to use only original spares.
12. Mount the rotors ( H ) with the referance notches facing
upwards so that they are visible.
13. Using a thickness gauge, measure the clearance between
the rotor teeth.
If clearance is above the 0.25mm limit for wear, replace
the rotors with original spares.
14. Check that the contact surfaces are perfectly clean, intact
and not deformed.
15. Mount the new O-ring.
Important
• The O-ring must always be replaced with an original spare
part whenever the pump is disassembled.
16. Replace the plate ( A ) and put in the screws ( L ).
17. Tighten the screws ( L ) to a torque of 10 Nm.
OVERHAULS AND TUNING