Doosan 7/71 - Coolant; Lubricant

50
FUEL, LUBRICANTS, AND COOLANT
7/71, 12/56
LUBRICANT.
The quality of engine oil can affect engine performance, startability
and engine life.
Use of unsuitable engine oil will result in piston ring, piston and
cylinder seizure and accelerate surface wear causing increased oil
consumption, lowered output and, finally engine failure. To avoid this,
use the specified engine oil.
1) Engine Oil Selection
PRO−TEC
2) Oil Viscosity
Engine oil viscosity affects engine startability, performance, oil
consumption, wear and the potential for seizure, etc. Always ensure
that lubricants with the correct viscosity for the operating temperature
are used. Refer to fig 12.
NOTE
Using a mixture of different brands or quality of oils will adversely affect
the original oil quality; therefore, never mix different brand or different
type oils.
Do not use API, CA, CB grade and reconstituted engine oil.
Engine damage due to improper maintenance, or using oil of the
improper quality and/or viscosity, is not covered by the warranty.
Fig. 12
A. (Single − grade)
B. Ambient Temperature
C. (Multi − grade)
COOLANT
All Doosan portable compressor engines are factory filled with a
50/50 Ethylene glycol base antifreeze/water mix. which provides
protection to −33C (−27F).
IMPORTANT:
• Be sure to add Long Life Coolant Antifreeze (LLC) to soft water. In
cold season, the LLC is especially important. Without LLC
,
cooling
performance will decrease due to scale and rust in the cooling water
line. Without LLC, cooling water will freeze and expand to break the
cooling line.
• Be sure to use the mixing ratios specified by the LLC manufacturer
for your temperature range.
• Do not mix different types (brand) of LLC, chemical reactions may
make the LLC useless and engine trouble could result.
• Replace the cooling water every once a year.
CAUTION: When handling Long Life Coolant Antifreeze, wear
protective rubber gloves not to contact with it. If contact with the eyes
or skin should occur, wash with clean water.