Buhler 535 User Manual
Page 180
435/485/535
4-47
F3-21
Operation 64
Change the Engine Coolant
WARNING: BEFORE DRAINING THE COOLING
SYSTEM, WAIT UNTIL THE ENGINE TEMPERATURE
IS BELOW 50°C (120°F) BEFORE REMOVING THE
RADIATOR PRESSURE CAP. FAILURE TO DO SO
CAN CAUSE PERSONAL INJURY FROM HEATED
COOLANT SPRAY.
The cooling system must be clean to work correctly .
Drain the system, and flush with clean water . If the
system shows mineral buildup, scale, rust, or oil,
clean with a heavy-duty engine coolant cleaner and
follow the manufacturer’s directions .
To drain the cooling system, first turn the temperature
control knob in the cab to the maximum heat position .
Make sure the heater valve () on the rear/right of the
engine is fully open .
Remove the radiator cap (2) from the top of the
radiator .
WARNING: THE COOLANT SYSTEM OPERATES
UNDER PRESSURE WHICH IS CONTROLLED BY
THE RADIATOR PRESSURE CAP. IT IS DANGEROUS
TO REMOVE THE PRESSURE CAP WHILE THE
SYSTEM IS HOT. WHEN THE SYSTEM HAS COOLED,
USE A THICK CLOTH AND TURN THE CAP SLOWLY
TO THE FIRST STOP AND ALLOW THE PRESSURE
TO ESCAPE BEFORE FULLY REMOVING THE CAP.
COOLANT SHOULD BE KEPT OFF THE SKIN.
ADHERE TO THE PRECAUTIONS OUTLINED ON
THE ANTIFREEZE AND INHIBITOR CONTAINERS,
WHERE USED.
To drain the radiator, open the petcock (3) located at
the bottom center of the radiator .
Drain all the coolant into a suitable container and
follow all local laws and regulations for disposal .
Section 4 - Lubrication & Maintenance
Every 2000 Hours or 2 Years
1
F4-9
2
F4-76
3