Changing Coolant - Komatsu WB140-2N Operation & Maintenance Manual

Hydraulic oil of the machines equipped with demolition hammer
deteriorates more rapidly than oil of the machines used for simple
digging operations.
Perform oil changes as scheduled on the accompanying table.

CHANGING COOLANT

• After the machine has been operated, coolant is very hot
and under pressure and it may cause serious burns. Let
the engine cool down until it reaches approximately 40-
45°C (104-113°F) before changing the coolant.
• Slowly loosen radiator cap, in order to release the resid-
ual pressure.
• Oils, filters, coolant, and the battery are considered spe-
cial waste and must be collected and disposed of
according to all anti-pollution regulations in force.
The following operations refer to changing permanent coolants, if the
coolant is water or water with antifreeze, which are used according to
the season, it is necessary to flush the cooling system in order to elimi-
nate any encrustation. (See "FLUSHING COOLING SYSTEM" on
page 3-59).
1. Open engine hood.
2. Loosen and remove upper radiator cap (1).
WB140-2N, WB150-2N
MAINTENANCE
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