Volvo Penta TAMD71B Instruction Manual page 51

10.5.3 Cleaning the heat
exchanger and charge air
cooler (CAC)
Close the water inlet and drain the wa-
ter from the raw water and freshwater
systems before working on the cooling
system.
1. Remove the cover plate over the heat ex-
changers and charge air coolers (CAC).
2. Remove the pipes between the raw water
pump and the heat exchanger or between
the CAC and the reverse gear's oil cooler.
3. Remove the covers over the heat exchang-
ers and the CAC. Remove the connecting
pipe(s) between the covers.
4. Remove the clamping rings beneath the
housings. Remove the O-rings at the lower
seal.
5. Lift the inserts. Flush and clean them inter-
nally and externally. Use suitable brushes.
Clean housing as well.
Note: Ensure that no contaminants enter the
engine's inlet manifold via the charge air
coolers (CAC).
6. Install the inserts in the housings. NOTE!
Ensure that the inserts are installed in the
correct position. The locating lugs beneath
the inserts' upper flange should face out-
wards (from the engine) and fit correspond-
ing notches in the housings, see illustration.
7. Locate the sealing strips on the inserts' baf-
fle plate and reinstall the covers together
with the connecting pipes between the cov-
ers. Use new sealing rings.
Note: The covers must be installed with the
recess on the cover's flange facing forwards,
see illustration.
8. Install the O-rings and clamping rings be-
neath the housings. Reinstall the coolant
pipe between the raw water pump and the
heat exchanger, or between the charge air
cooler and the reverse gear's oil cooler. Use
new sealing rings.
Reinstall the cover plate over the heat ex-
changers and charge air coolers (CAC).
9. Fill the engine with coolant and vent the sys-
tem as described in chap. 10.5.2.
10. Open the water inlet and start the engine.
Check for leaks.
AB Volvo Penta / Diesel Engine TAMD71B
Fig. 10.8 Heat exchanger/charge air cooler (CAC)
49