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MAINTENANCE
CHECK ELECTRICAL INTAKE AIR HEATER
Before the start of the cold season (once a year), contact your Komatsu distributor to have the electrical intake air
heater checked for dirt or disconnections.
REPLACE BUCKET TEETH (VERTICAL PIN TYPE)
Replace the bucket teeth before the adapter starts to wear.
It is dangerous if the work equipment moves by mis-
take when the teeth are being replaced.
Set the work equipment in a stable condition, then
stop the engine and set the safety lock lever securely
to the LOCK position.
The pins can be knocked out only with strong force,
so there is a hazard that the pin may fly out. Check
that there is no one in the surrounding area.
There is a hazard that fragments will fly during the
replacement work, so always wear protective equip-
ment like safety glasses and gloves.
1. Place a block under the bucket bottom to make it possible to
knock the pin of tooth (1) out with a hammer, and set so that
the bottom of the bucket is horizontal.
2. Use a hammer and drift to knock out lock pin (2). (If the drift
is set against rubber pin lock (3) when it is hit, the rubber pin
lock may break. Set it against the back of the pin.)
3. After removing lock pin (2) and rubber pin lock (3), check
them.
If lock pins and rubber pin locks with the following defects
are used, the teeth may come off the bucket. Replace them
with new ones.
The lock pin is too short.
The rubber of the rubber pin lock is torn, and the steel balls
may come out.
WARNING
.MAINTENANCE PROCEDURE
Free
Lock
The lock pin is too short (1/3 of A)
Align with bottom face
The rubber is broken and
the steel balls come out easily
0.
0.
Block
AW35789B
4-27
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