Hitachi ZAXIS 120-6 class Operator's Manual page 348

--- Visual Inspection
IMPORTANT: Incorrect engine oil level may cause trouble
in the engine (The oil level should be between the
upper and lower marks on dipstick (1)).
Even if the engine oil level exceeds the upper limit,
maintain oil to the proper level before starting the
engine.
Check oil level before starting the engine.
Open the engine cover and pull out dipstick (1). Wipe dipstick
(1) with cloth, re-insert it into the pipe to the end, and then
pull it out again.
The oil level should be between the upper and lower marks
on dipstick (1).
If oil level is below the lower limit mark, add the recommended
engine oil via oil filler (2).
If oil level exceeds the upper limit mark, remove cap (4) of
drain valve (3) at the bottom of the engine oil pan, and then
open drain valve (3) by turning drainer (5) to drain oil.
d
CAUTION: Avoid spillages while changing oil. Spilled
fuel and oil, trash, grease, debris, accumulated coal
dust, and other flammable materials may cause fires.
After refilling, make sure oil filler cap (2) is securely
closed.
IMPORTANT: Install drainer (5) to drain valve (3) slowly.
Oil may exhaust in large quantity when tightened at
once.
MAINTENANCE
3, 4
7-54
1
2
Max.
Min.
MDC1-07-023
1
M178-07-011
M1U1-07-045
5
M1U1-07-046