Hitachi Zaxis 850LC-3 Operator's Manual page 166

Warming-up Operation
Warm up the engine coolant as follows:
1. Run the engine with engine control dial (1) turned to the
slow idle position.
Hydraulic Oil Warm-Up Operation
IMPORTANT: Hydraulic components may be seriously
damaged if the machine is operated with
hydraulic oil temperature below 30°C (86°F).
Always warm hydraulic oil to specifications
before operating the machine.
In case the hydraulic oil temperature is lower than 0 °C
when starting the engine, the engine speed is automatically
increased for approx. 12 minutes to quickly warm up the hy-
draulic oil.
NOTE: As soon as the hydraulic oil is warmed upto 0 °C even
though it is still shorter than 12 minutes, the warm-up
operation is automatically complete so that the engine
runs at an idle speed.
During auto warm-up operation, if the engine speed is
increased more than that of the auto warm-up opera-
tion by operating engine control dial (1), the engine
runs at the speed set by engine control dial (1).
OPERATING THE MACHINE
5-4
Slow Idle
1
M1U1-01-033
M1J1-05-001