Hitachi ZAXIS 450LC-3, Operator'S Manual

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MAINTENANCE
7-98
J. MISCELLANEOUS
Check Bucket Teeth --- daily
Check the bucket teeth for wear and looseness
Check for wearing and looseness of the Bucket tooth points.
1. Replacement intervals
Replace tooth point (1) wear beyond the service limit,
replace them.
Dimension A in mm (in)
Model New
Limit of
Use
Parts No.
ZX450LC
-3
Standard 254 (10.0“) 120 (4.7“) 4471407
Rock
Bucket 280 (11.0“) 140 (5.5“) 4350781
ZX650LC
-3
Standard 280 (11.0“) 140 (5.5“) 4350781
Rock
Bucket 306 (12.0“) 160 (6.3“) 4472424
ZX850LC
-3
Standard 306 (12.0“) 160 (6.3“) 4472424
Rock
Bucket 315 (12.4“) 160 (6.3“) 4255718
f
NOTE: When tooth point (1) is used in excess of the service
limit, a hole will be made on tooth point (1), which
makes the nose exposed and worn out, and will
eventually break or let tooth point (1) fall off.
2. Replacement
d
WARNING: Guard against injury from flying pieces of
metal. Wear goggles or safety glasses.
(1) Removing the tooth point
(a) Preparations for removing tooth point (1).
Hit the left and right top ends and the left and
right lugs of tooth point (1) alternately with
hammer to knock off pebbles, soil, etc., stuck in
the gap between tooth point (1) and adapter (2).
(b) Inserting lock removal tool.
Remove pebbles, dirt, etc., completely from the
gap between lock pin (3) and adapter (2). Place
pin-removing jig on the top end of lock pin (3)
and hit it with hammer to remove lock pin (3).
When driving out the pin, first hit with a shorter
jig until top end of lock pin (3) comes to the
upper end position of the lug of tooth point (1),
and then use the longer jig to remove lock pin
(3).
M1J1-07-065
M1J1-07-066
M1J1-07-067
M1J1-07-068
1
2
2
1
2
1
3
3
A
1