32
4. Handling of pump (When overheated)
If the engine is overheated, coolant flows out from the cylinder head drain pipe.
Meanwhile a large quantity of steam gushes out of the cylinder head drain pipe. If
operation is continued, the safety device is activated and the engine stops.
How to cope with
(1) When the pump is operated for 15 minutes before sucking in water, steam
gushes out of the cylinder head drain pipe.
○
The steam stops when water discharge is started.
(2) When water discharge is suspended, steam gushes out of the cylinder head
drain pipe. Open the reflux cooling water drain cock and discharge the
cooling water.
(3) While water is being discharged, steam gushes out of the cylinder head
drain pipe.
○
If the water is discharged without attaching the nozzle, be sure to
connect the safety nozzle to the intermediate coupler. For the installing
method, refer to “4.Handling of pump (operating method), 3.Discharging
the water, (3) Use of safety nozzle: p25”.
(4) Steam gushes out of the cylinder head drain pipe for a reason other than (1)
to (3).
○
Concentration of the coolant may have increased to more than 70%
(water accounting for 30%). Adjust the concentration. For the
concentration adjusting method, see “D) Freezing concentration” of “5.
Periodical inspections: p39”.
After the steam gushes out of the cylinder head drain pipe for above
reason, open the radiator cap and supply coolant into the cylinder head.
At an emergency, operation can be continued by supplying clear water.
In such a case, change the clear water with anti-freezing solution later.
○
Do not open the radiator while it is too hot to touch with empty hands.
○
Do not approach the cylinder head drain pipe during operation.
Hot water may spout and you may get burnt.
Water shut-off drain pipe (large dia.)
Cylinder head drain pipe (small dia.)
Caution
Summary of Contents for FK500-A
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