Komatsu D65PX-12 Service Manual

MAINTENANCE SERVICE PROCEDURE
4-25
CLEAN INSIDE OF COOLING SYSTEM
WARNING
● Just after the engine is stopped, the cooling water is still hot and the internal pressure in the radiator
is still high. If the radiator cap is removed under this condition, you may scald yourself. Accordingly,
wait until the temperature lowers, then loosen the cap slowly to release the pressure.
● Start the engine to clean the cooling system. When standing up from the operator's seat or leaving the
machine, set the safety lock lever and brake lock lever in the LOCK positions.
● For the starting method of the engine, see "CHECK BEFORE STARTING ENGINE, ADJUST (PAGE 3-
42)" and "STARTING ENGINE (PAGE 3-60)" in OPERATION in the volume of operation.
● Never go into under the machine body while the engine is running. It is very dangerous since the
machine may move suddenly.
Clean the inside of the cooling system, change the coolant and replace the corrosion resistor according to the
table below.
Stop the machine on level ground when cleaning or changing the coolant.
Use a permanent type of antifreeze.
If, for some reason, it is impossible to use permanent type antifreeze, use an antifreeze containing ethylene glycol.
When deciding the ratio of antifreeze to water, check the lowest temperature in the past, and decide from the mix-
ing rate table given below.
It is actually better to estimate a temperature about 10ºC (50ºF) lower when deciding the mixing rate.
Mixing rate of water and antifreeze
Kind of coolant
Cleaning inside of cooling system
and changing coolant
Permanent type antifreeze
(All season type)
Every year (autumn) or every 2000
hours whichever comes first
Non permanent type antifreeze
containing ethylene glycol
(Winter, one season type)
Every 6 months (spring, autumn)
(Drain antifreeze in spring, add anti-
freeze in autumn)
When not using antifreeze
Every 6 months or every 1000 hours
whichever comes first
Min.
atmospheric
temperature
°C -10-15-20-25-30
°F 14 5 -4 -13 -22
Amount of
antifreeze
liters 17.4 20.9 23.8 26.7 29.0
US gal 4.60 5.52 6.29 7.05 7.66
Amount of
water
liters 40.6 37.1 34.2 31.3 29.0
US gal 10.73 9.80 9.04 8.27 7.66

Komatsu D65PX-12 Specifications

General

Brand	Komatsu
Model	D65PX-12
Category	Construction Equipment
Language	English