TM 5-3805-280-24-2
Buckets
REPLACE WELDED CUTTING EDGE
TEMPERATURE MUST BE THROUGHOUT THE
IMPORTANT: Electrical current traveling from the
ENTIRE THICKNESS OF THE PARTS JOINED
welder through the machine's
AND AT LEAST 51 mm (2 in.) BACK FROM THE
electrical system may damage the
JOINT. Maintain preheat throughout the entire
electrical system, including the
welding operation. Tempilstiks should be used if
battery, and the engine and pump
possible.
controller. Before welding on the
machine, the battery ground cable
6. Tack weld preheated plates starting at center of
and wiring harness connectors to
bucket and working towards the outside ends.
the engine and pump controller must
be disconnected to protect the
7. Final weld preheated plates starting at the center of
machine's electrical system.
front edge of bucket backing plate and working
towards the outside ends.
1. Disconnect the battery ground strap and the wiring
harness connectors to the engine and pump
Repeat this operation at back edge of plates.
controller. (See Welding on Machine in this group.)
Tack welds may be incorporated into the final weld,
2. Perform welding in an environment with a minimum
ambient temperature of 10C (50F).
providing they have been made with electrodes that
meet the requirements of the final welds and no
cracking has occurred in the weld metal. Tack
3. Clean all joints to be welded of all foreign matter
welds not meeting these requirements must be
such as dirt, rust, mill scale, oil, etc. with grinders
completely removed by grinding or air arc gouging
and/or solvents.
just prior to making the final weld in that area.
4. Use dry AWS-E7018 low hydrogen electrodes or
8. Do not remove bucket from welding environment
either of the following equivalent low hydrogen wire
until weld metal temperature has dropped to the
feed electrodes: gas metal arc welding (CO2 or
ambient temperature. Do not force cooling rate of
weld metal.
AWS-E70T1.
5. Preheat parts to be welded (both tack and final
welds) to minimum of 204C (400F). PREHEAT
TX,33,GG2397 1914DEC961/1
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