Doosan 7/26E, Operation And Maintenance Manual

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72 PERIODICAL INSPECTION AND MAINTENANCE
7/26E, 7/31E, 7/41
Inspection after initial 50 hours operation
(1) Replacing the engine oil and engine oil filter (1st time)
When the engine oil is still hot, be careful with a splash of engine oil
which may cause burns. Cool the engine to replace engine oil until the
engine oil becomes warm. It is most effective to drain the engine oil
while the engine is still warm.
In early period of use, the engine oil gets dirty rapidly because of the
initial wear of internal parts. Replace the engine oil earlier.
Engine oil filter should also, be replaced when the engine oil is
replaced.
Engine oil and engine oil filter replacing procedures are as follows.
Remove the oil filler cap to drain easily while draining the engine oil.
1) Prepare a waste oil container collecting waste oil.
2) Loosen the drain plug using a wrench (customer procured) to drain
the engine oil.
3) Securely tighten the drain plug after draining the engine oil.
4) Turn the engine oil filter counter-clockwise using a filter wrench
(customer procured) to remove It.
5) Clean the engine oil filter mounting face.
6) Moisten the new engine oil filter gasket with the engine oil and
install the new engine oil filter manually turning it clockwise until it
comes into contact with the mounting surface, and tighten it further to
3/4 of a turn with the filter wrench.
Tightening torque: 19.6~23.5N•m (2.0~2.4kgf•m)
7) Fill with the new engine oil until it reaches the specified level as
explained in OPERATION section.
IMPORTANT: Do not overfill the oil pan with engine oil. Be sure to keep
the specified level between upper and lower limit on the dipstick.
8) Warm up the engine by running for 5 minutes while checking any oil
leakage.
9) Stop the engine after warming up and leave it stopping for about 10
minute to recheck the engine oil level with dipstick and replenish the
engine oil. If any oil is spilled, wipe it away with a clean cloth.
The location depends on the engine installed on the machine unit.
A. Dipstick
B. Oil pan
C. Drain plug
A. Engine oil filter
B. Loosen
C. Tighten
(2) Checking and adjusting cooling fan V-belt
When there is not enough tension in the V-belt, the V-belt will slip
making it impossible for the alternator to generate power and cooling
water pump and cooling fan will not work causing the engine to
overheat. Check and adjust the V-belt tension (deflection) in the
following manner.
1) Press the V-belt down with your thumb [approx. 98N(10kgf)]. at the
middle of the V-belt span to check the tension (deflection).
Available positions to check and adjust the V-belt tension (deflection)
are at the A, B and C showing with the arrow direction as shown
illustration right.
Applicable engine oil filter Part No.
All engines CCN 15897630