Check Bucket Teeth - Hitachi Zaxis 850LC-3 Operator's Manual

1 Check Bucket Teeth --- daily
ZAXIS850
-3
Check the bucket teeth for wear and looseness
Replace the point when it has worn to the front end of ESCO
marks on the side faces of the point, or to the allowable limit
shown in the following table.
Dimension A in mm (ft•in)
Dimension A mm (ft•in)
Part no.
Neww
4472424 300 (1'0")
NOTE: Be sure to replace tooth point (1) before its wear ex-
ceeds the limit as the exposed adapter nose caused by
the worn point is worn out quickly, resulting in tooth
point breakage or slipping off.
Replacing procedure
WARNING: Guard against injury from flying pieces
of metal. Wear goggles or safety glasses, and safety
equipment appropriate to the job.
1. Removal
(a) Remove sand and mud stuck between the tooth point
(1) and adapter (2) by tapping the tip and lugs of the
tooth point alternately, as shown, with a hammer.
(b) Thoroughly clean the clearance between the adapter
(2) and locking pin (3).
(c) Use a hammer [1.4 to 2.2 kg (3 to 5 lb)] and pin remov-
ing tool to drive out locking pin (3).
First position the shorter end of the pin removing tool
on the locking pin and hit until the locking pin top
sinks flush with the lugs of the tooth point, and then
position the longer end of the pin removing tool on
the locking pin and drive out the locking pin (3).
MAINTENANCE
Note
Limit of Use
130 (5") Backhoe
1
Limit of Use
2
1
7-76
A
1
3
3
M162-07-078
M116-07-125
2
M116-07-131