Hitachi ZAXIS 30U-5N User Manual

OPERATING THE MACHINE
5-7
Warming Up Operation
In cold weather, warm up the machine until coolant and
hydraulic oil temperature increases to the appropriate
operating temperature.
IMPORTANT: The appropriate hydraulic oil operating
temperature on this machine is 50 to 80 °C. Hydraulic
components may be seriously damaged if the machine
is operated with low temperature hydraulic oil. In case
warming up the machine by relieving the hydraulic
system, continuously relieve the relief valve for 10 to
15 seconds while taking a pause for 5 to 10 seconds.
1. Turn engine control dial (1) to the slow idle position.
 (Donotoperatethemachineuntilthefirstsegment
of coolant temperature gauge (2) stops flashing and
changestostayON.)
2. After the first segment of coolant temperature gauge
(2)stopsflashingandchangestostayON,turnengine
control dial (1) to around medium position.
3. Operatetheboom,armandbucketcylindersslowlyto
eachstrokeendseveraltimes.Ifthemachineequipped
with various attachments, operate the attachment
function slowly to allow hydraulic oil to circulate through
the system.
4. Operatethetravelandswingfunctionsslowlytoallow
hydraulic oil to circulate through the systems.
5. Warmingupoperationendsaftertheaboveoperationis
completed.
f
NOTE: During cold weather season, the warm-up operation
system automatically operates so that the engine speed
increases for a moment even though the engine control dial
(1) is in the slow idle position.
1
SlowIdle
Fast Idle
MADB-01-067
2
MADH-01-009

Hitachi ZAXIS 30U-5N Specifications

General

Brand	Hitachi
Model	ZAXIS 30U-5N
Category	Excavators
Language	English