Section 5 – PERIODIC MAINTENANCE
Mini-Crawler Crane M A E D A
5-50 3/2019 MC305C-3
The mixing ratio between water and antifreeze is
to be determined with respect to past minimum
temperatures, in accordance with "Mixing ratio
between water and antifreeze" shown below.
For actual mixing, set temperature 10 °C lower
than minimum temperature.
Mixing Ratio between Water and Antifreeze
Min. temperature
Mixed quantity
• Antifreeze-mixed water drain pan: A 6-L
container
• Have a water filling hose available.
1. Place the machine on a level surface.
2. See "OUTRIGGER SETTING" on page 4-36
and rotate the outriggers outward.
3. See "Removing Machinery Cover" on page
5-18 and remove the machinery cover.
4. Turn the radiator cap (5) slowly until it comes
into contact with the stopper to relieve
internal pressure from the radiator.
Fig. 5-85
5. With no pressure in the radiator, give further
turning of the radiator cap (5) until it reaches
the stopper while holding it down. Remove
the radiator cap (5).
6. Place a drain pan under the drain valve (8)
lying below the radiator to receive coolant
(antifreeze-mixed water).
Fig. 5-86
7. Open the drain valve (8) to drain coolant.
Close the drain valve (8) upon completion of
draining.
8. Supply tap water to the radiator through the
radiator supply port. The radiator needs to be
filled up to the supply port.
9. Start the engine with the drain valve (8) open,
and ensure the engine runs at low idle.
Conduct a 10-minute cleaning with running
water.
CAUTION:
• The radiator is to retain a high water level
during cleaning with running water. Adjust
the quantities of water supplied and drained
as necessary.
• Ensure that the water filling hose stays
connected to the radiator supply port
properly during cleaning with running water.
10. After cleaning, stop the engine and water
supply and drain tap water. Close the drain
valve (8) upon completion of draining.
NOTICE: Cleaning with the cleaning agent must
conform to instructions provided on the cleaning
agent.
11. Open the drain valve (8) to drain the cleaning
agent after cleaning with the agent. Close the
drain valve (8) upon completion of draining.
12. Supply tap water to the radiator through the
radiator supply port. The radiator needs to be
filled up to the supply port.
13. Start the engine with the drain valve (8) open,
and ensure the engine runs at low idle.
Conduct a cleaning with running water until
clean water flows out of the radiator.
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