Hitachi ZW 120-6 Operator's Manual page 223

Maintenance Guide Table
The maintenance guide table is affixed to the inside of left
side step. Lubricate and/or service the parts at the intervals
as instructed in the table so that all necessary maintenance
can be performed regularly.
 Symbol Marks
The following marks are used in the maintenance guide
table.
Grease
(Front Joint Pin, Cylinder Pin, Propeller Shaft)
Engine Oil
Engine Oil Filter
Coolant
Transmission Oil
(Transmission)
Transmission Oil Filter
MAINTENANCE
Hydraulic Oil
Hydraulic Oil Filters
(Pilot Filter, HST Charge Filter, Hydraulic
Oil Tank Filter, Suction Filter, Air Breather
Element)
Axle Gear Oil
(Final Drive, Differential Gear)
Fuel
Fuel Filter
(Fuel Main Filter, Pre-Filter)
DEF/AdBlue®
DEF/AdBlue® Supply Module Main Filter
7-5