SECTION 05A: H3 SERIES COOLING SYSTEM
PA1621 Maintenance Manual All Series | January 2017
17
5. Connect coolant extractor (Figure 16). Use
coolant extractor to drain the coolant from the
engine. An alternate method is to drain the
coolant into a suitable container using the
drain hose.
WARNING
Coolant is toxic; risk of poisoning. Do not
drink coolant. Use proper hand protection
when handling. Keep coolant out of reach of
children and animals. Failure to follow these
precautions can cause serious illness or
death.
FIGURE 16: EXTRACTING COOLANT 05093
6. Open the radiator drain cock.
7. Remove the transmission oil cooler. Drain,
flush and inspect. Refer to Section 7,
“TRANSMISSION” for oil cooler maintenance
or preventive replacement.
CAUTION
Drain water pump completely before extended
storage to avoid possible water pump
damage.
If freezing weather is anticipated and the
engine is not protected with antifreeze, drain
the cooling system completely when vehicle is
not in use. Trapped water in the cylinder
block, radiator or other components may
freeze and expand resulting in damages.
Leave the drain plugs open until the cooling
system can be filled with coolant fluid. Do not
run engine with cooling system empty.
To drain the entire system, do the previous
steps while maintaining the shutoff valves in the
open position; then follow the procedure under
“Draining Heating System” in Section 22.
8 FILLING COOLING SYSTEM
If only the engine and related components were
drained, maintain the two heater line shutoff
valves in their closed position, then proceed as
follows:
1. Close radiator drain cock.
2. Open the shut-off valve on the coolant filter
mounting head.
3. Refill cooling system from the surge tank
filler cap inlet with the recommended
ethylene glycol-based antifreeze and water
solution of the required concentration using
the coolant extractor.
NOTE
Make sure the purge lines are properly
connected and not obstructed. The purge lines
(thermostat housing dome, radiator top tank,
transmission oil cooler or delivery line) are
required to ensure complete engine fill and
proper purging of air in the system.
NOTE
The coolant level should remain within two
inches of the surge tank filler neck.
4. Install the filler and pressure cap, then start
the engine and run it at fast idle until
reaching normal operating temperature.
Check for leaks.
To Next Page
Loading...
Need help?
General
