Replace Rubber Hoses Periodically; Avoid High-Pressure Fluids - Hitachi ZAXIS 30U-5N Operator's Manual

Replace Rubber Hoses Periodically

 Rubber hoses that contain flammable fluids such as
hydraulic oil or fuel under pressure may break due to aging,
fatigue, and abrasion. It is very difficult to gauge the extent
of deterioration due to aging, fatigue, and abrasion of
rubber hoses by visual inspection alone.
 Periodically replace the rubber hoses. (Refer to the
Periodical Replacement Parts section.)
 Failure to periodically replace rubber hoses may cause a fire,
fluid injection into skin, or the front attachment to fall on a
person nearby, which may result in severe burns, gangrene,
or otherwise serious injury or death.

Avoid High-Pressure Fluids

 Fluids such as diesel fuel or hydraulic oil under pressure can
penetrate the skin or eyes causing serious injury, blindness
or death.
 Avoid this hazard by relieving pressure before
disconnecting hydraulic or other lines. Make sure that all
connectors are completely connected before applying
pressure.
 Search for leaks with a piece of cardboard; take care to
protect hands and body from high-pressure fluids. Wear a
face shield or goggles for eye protection.
 If an accident occurs, see a doctor familiar with this
type of injury immediately. Any fluid injected into the
skin must be surgically removed within a few hours, or
gangrene may result.
SAFETY
S-28
SA-019
SA-031
SA-292
SA-044