New Holland LS140 Workshop Manual page 598

SECTION 82 - FRONT LOADER (BOOM AND MOUNTING PLATE)
BUCKETS
Op. 82 100 12
CUTTING EDGE (REPLACEMENT)
Cut or grind the old cutting edge from the bucket floor
and sides. Remove all old weld and foreign material
from the welding area.
1. Straighten the bucket floor and sides if required.
2. Thoroughly clean the area where the new cutting
edge will be welded.
3. Use dry AWS-E7018 low hydrogen electrodes or
either of the following equivalent low hydrogen
wire feed electrodes: Gas metal arc welding
(CO or argon CO ) AWS-E70S6 or flux cored
2 2
arc welding AWS-E70T1.
4. Preheat the parts to be welded (both tack and fi-
nal welds) to a minimum of 204° C (400° F). The
preheat temperature must be throughout the
entire thickness of the parts joined, and at
least 51 mm (2") back from the joint. Maintain
preheat throughout the entire welding operation.
NOTE: This is a hardened steel edge. If not pre-
heated, the cutting edge may later crack during use.
5. Tack weld the preheated parts starting at the cen-
ter of the bucket and working toward the outside
ends.
6. Finish welding the preheated parts starting at the
center of the front edge of the bucket floor and
working toward the outside ends. Repeat this op-
eration at the back side of the cutting edge to
bucket floor.
7. Do not remove the bucket from the welding envi-
ronment until the weld and metal temperature
drops to the ambient temperature. Do not force
the cooling rate of the welds and material.
Follow the same welding procedure for welding the
side cutting edges and bottom wear plates to the
bucket.
82-9
Copyright © New Holland
14
15