Komatsu D31EX-21, Руководство по эксплуатации и техническому обслуживанию, Страница: 50 / 256

PRECAUTIONS FOR MAINTENANCE
SAFETY
2-32
PRECAUTIONS WHEN USING HIGH-PRESSURE GREASE TO ADJUST TRACK TENSION
q
Grease is pumped into the track tension adjustment sys-
tem under high pressure.
If the specified procedure for maintenance is not followed
when making adjustment, grease drain plug (1) may fly out
and cause serious injury or property damage.
q
When loosening grease drain plug (1) to loosen the track
tension, never loosen it more than one turn. Loosen the
grease drain plug slowly.
q
Never put your face, hands, feet, or any other part of your
body close to grease drain plug (1).
DO NOT DISASSEMBLE RECOIL SPRING
Never attempt to disassemble the recoils spring assembly. It contains a spring under high pressure which serves
as a shock absorber for the idler. If it is disassembled by mistake, the spring will fly out and cause serious injury.
When it becomes necessary to disassemble it, ask your Komatsu distributor to do the work.
PRECAUTION WITH HIGH-PRESSURE OIL
The hydraulic system is always under internal pressure. When inspecting or replacing piping or hoses, always
check that the pressure in the hydraulic circuit has been released. If the circuit is still under pressure, it will lead to
serious injury, so always do as follows.
q
For the procedure to release internal pressure, see “PROCEDURE FOR RELEASING INTERNAL PRES-
SURE OF HYDRAULIC SYSTEM (4-35)“. Do not inspect or replace any part while internal pressure is
applied.
q
If there is any leakage from the piping or hoses, the surrounding area will be wet, so check for cracks in the
piping and hoses and for swelling in the hoses.
When carry out inspection, wear safety glasses and leather gloves.
q
There is a hazard that high-pressure oil leaking from small
holes may penetrate your skin or cause blindness if it con-
tacts your eyes directly. If you are hit by a jet of high-pres-
sure oil and suffer injury to your skin or eyes, wash the
place with clean water, and consult a doctor immediately
for medical attention.