Change Hydraulic Oil/Clean Hydraulic Oil Tank - Hitachi ZW 310-6 Operator's Manual

Change Hydraulic Oil/Clean Hydraulic Oil Tank

--- every 4000 hours
Changing and cleaning procedure
d
WARNING: Hydraulic oil becomes hot and pressurized
during operation. Severe burns may result if
skin comes in contact with escaping hydraulic oil
immediately after operation. Wait for the oil to cool
before starting any maintenance work.
IMPORTANT: Do not use hydraulic oils other than listed in
the "Brand Names of Recommended Hydraulic Oil".
1. Park the machine following the same procedures as
described on page 7-8 for preparation of inspection/
maintenance work.
2. Install articulation lock bar (1) to the front and rear of the
frame by following the procedures described on page
7-10.
3. Before changing the hydraulic oil, be sure to relieve the
air pressure from the hydraulic oil tank (4) by pressing air
bleed valve (2).
IMPORTANT: When changing hydraulic oil, take care not
to permit foreign matter such as dirt, water, and /or
sand to enter into the hydraulic oil tank.
4. Remove air bleed valve (2).
Arrange a container of approx. 200 liters.
Remove hydraulic oil using an oil supply pump. Remove
drain plug (7) to drain hydraulic oil.
5. Remove cleaning cover (5) on the side of hydraulic oil
tank (4). Clean the tank bottom with cleaning oil. Install
the cover and a new gasket to the original position after
cleaning.
6. Install drain plug (7).
MAINTENANCE
4
7-51
MNFB-07-003
90Z7-7-40-2
T4A breather valve2