Hitachi ZW 310-6 Operator's Manual page 320

Maintenance Guide Table
The maintenance guide table is affixed to the reverse side
of the tool box cover. 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
(Long-Life Coolant)
Transmission Oil
(Transmission, Torque Converter)
Transmission Oil Filter
MAINTENANCE
7-6
Hydraulic Oil
Hydraulic Oil Filters
(Hydraulic Oil Tank Filter, Suction Filter, Air
Breather Element)
Gear Oil
(Final Drive, Differential Gear)
Fuel
Fuel Filter
(Fuel Main Filter, Pre-Filter)
DEF/AdBlue® Supply Module Main Filter