1799633 HEAD Caterpillar parts
315C, 315D L, 316E L, 318D L, 318E L
Rating:
Alternative (cross code) number:
CA1799633
179-9633
1799633
CA1799633
179-9633
1799633
Weight: 26 pounds 12 kg.
EXCAVATOR,
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2025-07-19
Number on catalog scheme:
22
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TECHNICAL INFORMATION BULLETIN AUGUST 20, 2003
EXCAVATOR
WHEEL LOADER All EXCAVATORS
All WHEEL LOADERS
Component Code(s) 6803, 6800, 6823, 6001SUBJECT: ADAPTER WELDS AND BASE EDGE CRACKING
PROBLEM:
Base edge assemblies usually fail by cracks developing along the toe of the adapter welds. Factors that contribute to the failures are the number of loading cycles, the size of the load, the stiffness (thickness) of the base edge, and the quality of the adapter welds. The process for welding the adapters to the bucket base edge can contribute to these failures.
SOLUTION:
Welds act as stress concentrators. Undercut weld toes, depth of fusion, hydrogen embrittlement, weld contamination, and the formation of a heat affected zone during the weld process contribute to the early formation and rapid propagation of base edge cracks.
Tests recently performed at Caterpillar have revealed that the base edge assembly fatigue life can be substantially improved by the proper selection of where the last weld pass on the adapter is applied.
When the last weld pass is applied next to the base edge, the quenching action of the base edge mass will draw the heat away rapidly enough and create a heat affected zone in the base edge next to the weld. The quenching action occurs even when the base edge and adapter are preheated to 177 to 240?C (350 to 500?F). The heat affected zone will become several points harder and more brittle than the parent metal.
The last weld pass must be applied next to the outermost weld bead that is fused into the base edge. The additional heat input to the toe of the weld tempers and reduces the hardness of the base edge in the heat affected zone. The result is an improved weld.
Adapter strap failures on corner adapters will usually occur at the toe of the weld for the sidebar. The last weld pass must be applied to the adapter strap in the same sequence as to the base edge in order to improve the weld.
Note: For additional information, refer to Special Instruction, REHS0597, "Recommendations for Welding 2-Strap Bucket Adapters to Base Edges".
COPYRIGHT 2003 CATERPILLAR
ALL RIGHTS RESERVED
Caterpillar parts catalog:
Parts head Caterpillar catalog:
7Y4202
HEAD
311C, 313D2 LGP, 315C, 315D L, 316E L, 318B, 318C, 318D L, 318D2 L, 318E L, 319D, 319D L, 319D LN, 320 L, 320B, 320B L, 320C, 320C L, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2,...
311C, 313D2 LGP, 315C, 315D L, 316E L, 318B, 318C, 318D L, 318D2 L, 318E L, 319D, 319D L, 319D LN, 320 L, 320B, 320B L, 320C, 320C L, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2,...
2898195
HEAD AS-FILTER
1090, 1190, 1190T, 1290T, 1390, 2290, 2390, 2391, 2491, 2590, 311C, 311D LRR, 311F LRR, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D ...
1090, 1190, 1190T, 1290T, 1390, 2290, 2390, 2391, 2491, 2590, 311C, 311D LRR, 311F LRR, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D ...
1733439
HEAD GP-MOTOR
315D L, 316E L, 318C, 318D L, 318E L, 319C, 319D, 319D L, 319D LN, 320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L...
315D L, 316E L, 318C, 318D L, 318E L, 319C, 319D, 319D L, 319D LN, 320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L...
3852895
HEAD
315D L, 316E L, 318D L, 318D2 L, 318E L
315D L, 316E L, 318D L, 318D2 L, 318E L
3995122
HEAD
315D L, 316E L, 318D L, 318D2 L, 318E L
315D L, 316E L, 318D L, 318D2 L, 318E L
3852929
HEAD
315D L, 316E L, 318D L, 318D2 L, 318E L
315D L, 316E L, 318D L, 318D2 L, 318E L
3465606
HEAD
315D L, 316E L, 318D2 L, 318E L, PIN GRAB
315D L, 316E L, 318D2 L, 318E L, PIN GRAB
2166677
HEAD AS
311D LRR, 311F LRR, 312D, 312D L, 312D2, 312E, 314D CR, 314D LCR, 314E CR, 315D L, 316E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320D2, 320D2 L, 320E, 320E RR, 321C, 321D LCR, 323D L, 323D...
311D LRR, 311F LRR, 312D, 312D L, 312D2, 312E, 314D CR, 314D LCR, 314E CR, 315D L, 316E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320D2, 320D2 L, 320E, 320E RR, 321C, 321D LCR, 323D L, 323D...
2742565
HEAD
311D LRR, 312D, 312D L, 312E L, 314D CR, 314D LCR, 314E LCR, 315D L
311D LRR, 312D, 312D L, 312E L, 314D CR, 314D LCR, 314E LCR, 315D L
3852928
HEAD
318E L
318E L
2235601
HEAD
315C, 315D L, D3G, D4G, D5G
315C, 315D L, D3G, D4G, D5G
315C, 315D L, D3K XL, D3K2 LGP, D4K XL, D4K2 XL, D5K LGP, D5K2 XL
1733358
HEAD
312C, 312C L, 312D, 312D L, 312E, 312E L, 313D, 313D2, 314C, 314D CR, 314D LCR, 314E LCR, 345B II, 345C
312C, 312C L, 312D, 312D L, 312E, 312E L, 313D, 313D2, 314C, 314D CR, 314D LCR, 314E LCR, 345B II, 345C
1884058
HEAD
307C, 308C
307C, 308C
3746081
HEAD
307C, 307D, 308C, 308D
307C, 307D, 308C, 308D
3924590
HEAD
307C, 307D, 307E
307C, 307D, 307E
3802457
HEAD
307C, 307D, 308C, 308D
307C, 307D, 308C, 308D
1733351
HEAD
307C, 307D, 311D LRR, 312C, 312C L, 312D, 312D L, 312E, 312E L, 313D, 313D2, 314C, 314D CR, 314D LCR, 314E CR, 314E LCR
307C, 307D, 311D LRR, 312C, 312C L, 312D, 312D L, 312E, 312E L, 313D, 313D2, 314C, 314D CR, 314D LCR, 314E CR, 314E LCR
2219072
HEAD AS
312C
312C
2069496
HEAD
M315C, M315D, M316C, M316D
M315C, M315D, M316C, M316D
1989085
HEAD AS
M318C, M318C MH, M318D, M318D MH, M322C, M322D, M322D MH
M318C, M318C MH, M318D, M318D MH, M322C, M322D, M322D MH
1090, 1190, 1190T, 1290T, 2290, 2390, 2391, 2491, 320B, 320C, 322 FM L, 322 LN, 322B L, 322B LN, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 324D L, 324D LN, 325B L, 325C, 325C FM, 325C L, 325D MH, 330C...
1838878
HEAD
M315C, M315D, M318C, M318C MH, M318D, M318D MH
M315C, M315D, M318C, M318C MH, M318D, M318D MH
1721029
HEAD
M318C, M318C MH, M318D, M318D MH, M325C MH, M325D L MH
M318C, M318C MH, M318D, M318D MH, M325C MH, M325D L MH