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18
Repair
Service Manual EF 473 / EF 474 enVersion 1.0
Replacing thermoblock and NTC
Tools:
- Torx screwdrivers T10, T30
- Open-ended spanner 10 mm AF
- Torque wrench
Procedure:
1. Follow general disassembly (see page 16).
2. Remove screw (23) and detach holder
(48) with flow meter (47).
3. Remove 3 screws (23) and separate
thermoblock (40) with support (40) from
chassis.
4. Remove screw M3.5 x 25, washer and
rubber gasket and separate thermoblock
(40) from its support.
5. Remove screw (38) and separate fine wire
fuse (900) from thermoblock.
6. Remove electronic housing (28).
7. Unplug NTC connector from electronic
control board (28).
8. Remove NTC (43) from thermoblock and
replace it if defective.
9. Remove clips (13) and hose connectors
(16, 26) from thermoblock.
10. Remove ground wire and electrical
connections from thermoblock.
11. Replace defective thermoblock.
12. Assemble in reverse sequence.
)
Use a torque wrench (90 - 110 Ncm)
to tighten NTC temperature sensor
(43) with spring washer (42).
40
23
38
38
39
900
43
M3.5 x 25
28
13
26
16
23
47 + 48
40
42