Maintenance Procedures At 500 Hours Or 6 Months; Maintenance Procedures - Overview; Cooling System - Doosan DX140R Shop Manual

MAINTENANCE PROCEDURES
AT 500 HOURS OR 6 MONTHS

Maintenance Procedures - Overview

General Information
All maintenance checks and inspections listed in previous
maintenance intervals must also be performed at this time, in
addition to those listed under this maintenance interval.

Cooling System

General Information
Do not remove the pressure cap from a hot engine. Wait
until the coolant temperature is below 50°C (120°F) before
removing the pressure cap. Heated coolant spray or steam
can cause personal injury.
Never use a sealing additive to stop leaks in the
NOTE:
coolant system. This can result in coolant system
plugging and inadequate coolant flow, causing the
engine to overheat.
The engine coolant level must be checked daily.Remove the
pressure cap.
Do not add cold coolant to a hot engine. Engine castings
can be damaged. Allow the engine to cool below 50°C
(120°F) before adding coolant.
On applications that use a coolant recovery system, check to
make sure the coolant is at the appropriate level on the coolant
recovery tank, for the engine temperature.
Many coolant recovery/expansion tanks, also called "top tanks",
have sight glasses (1) or are made of a clear material (not
shown) to aid in checking the coolant level (2) without removing
the radiator cap.
QSB4.5 Engine
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WARNING!
CAUTION!
Figure 60
Figure 61
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