Komatsu D31EX-21, Руководство по эксплуатации и техническому обслуживанию, Страница: 211 / 256

MAINTENANCE
SERVICE PROCEDURE
4-31
CHECK DOOR LOCK STRIKER 4
(Machines equipped with cab)
If the wear of the door lock striker exceeds 0.5 mm, replace the
striker. If it is used at it is, the play will increase and this may
result in breakage of the hinge or door lock.
CHECK, ADJUST AIR CONDITIONER 4
(Machines equipped with cab)
CHECKING TENSION OF COMPRESSOR BELT
If the belt is loose, it will slip and the cooling effect will be
reduced.
From time to time, press a point midway between the drive pul-
ley and compressor pulley with your finger (approx. 98 N (10
kgf)) and check that the tension is 15 to 18 mm.
When the belt is new, there will be initial elongation, so always
adjust again after 2 or 3 days.
CHECK LEVEL OF REFRIGERANT
WARNING
If the refrigerant used in the cooler gets into your eyes or on your hands, it may cause loss of sight or
frostbite. Do not touch the refrigerant. Never loosen any part of the refrigerant circuit.
Do not bring any flame close to any point where the refrigerant gas is leaking.
This is inside the inspection cover on the right side at the rear
of the machine.
If the level of the refrigerant (gas) is low, the cooling effect will
be reduced. Run the engine at high idling, and check the flow
of the refrigerant in the refrigerant circuit through the sight
glass of the receiver when the cooler is running at high speed.
Striker
Compressor pulley
Drive pulley