MAINTENANCE AND SERVICING
6. Close the heater shut-off valve (A) and disconnect
hose on heater side of valve.
7. Openvalvetodraintheblock.
8. When sys te m is drained, rea tt ach hos e on valve (A).
Figure 5.92: Heater Shut-Off Valve
9. Close radiator drain valve (A) at the bottom of the
engine side of the radiator lower tank. (Frame has
been removed from illustration for clarity.)
10. Fill system with clean water through the radiator and
replace radiator cap.
Figure 5.93: Radiator Drain Valve
11. Open heater shut-off valve (A).
12. Start engine and turn temperature control knob to
HIGH. R un engine until normal operating temperature
is reached.
13. Stop the engine and drain water out before rust or
sediment settles. Repeat coolant removal procedure.
14. Close drain valves and fillsystemwithasolutionof
clean water and a heavy duty radiator cleaner. Follow
instructions provided with cleaner.
15. After u sing the cleaner solution, flush system with
clean water again. Inspect radiator, hoses, and fittings
for leaks.
16. Close drain valve s and fill sys tem. Refer to Adding
Coolant, p age 357.
17. Close the platfo rm. Refer t o 5.3.2 Closing Platforms
(Standard Position), page 310.
18. Close the hood. Refer to 5.2.4 Closing Hood (Highest
Position), page 308.
Figure 5.94: Heater Shut-Off Valve
147649 356 Revision A
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