Komatsu PC290LC-6K Operation & Maintenance Manual page 190

24. SERVICE PROCEDURE
24.2.9 CHECK WINDOW WASHER FLUID LEVEL, ADD
FLUID
If air is ejected with the window washer fluid, check the fluid level in
window washer tank
window washer fluid.
When adding fluid, be careful not to let dirt or dust get in.
• Mixture ratio of pure washer fluid and water
Since the ratio should be varied depending on atmospheric temperature,
replenish washer fluid at the following mixture ratio, taking temperature
into account.
Operation area
and season
Normal
Winter in cold region
Winter in extremely
cold region
Pure washer fluid comes in two types: for -10°C(14°F) (for general use)
and for -30°C (-22°F) (cold regions).
Use pure washer fluid according to operation area and season.
3-44
. If showing under the level, fill with automobile
Mixture ratio
Pure washer fluid
1/3: water 2/3
Pure washer fluid
1/2: water 1/2
Pure washer fluid
Freezing
temperature
- 10° C(14°F)
- 20°C (- 4°F)
- 30°C (- 22°F)