2008/06/16 Caterpillar

Excavator:

365C L (S/N: ELC1-UP; MEM1-UP; FEN1-UP; MCS1-UP; MCY1-UP)

365C L MH (S/N: GWC1-UP)

365C L FS (S/N: PAR1-UP)

385B (S/N: RCD1-UP; BKF1-UP; CLS1-UP; BKX1-UP)

385B L (S/N: MYA1-UP; FDL1-UP; ANS1-UP; BLY1-UP)

385C (S/N: KBC1-UP; KKK1-UP; JCM1-UP; MNZ1-UP)

385C L (S/N: EDA1-UP; KGB1-UP; SBE1-UP; T2E1-UP)

385C L MH (S/N: WAW1-UP)

385C FS (S/N: MMA1-UP; T2F1-UP; EAM1-UP)

5090B (S/N: CLD1-UP; SJY1-UP)

Mobile Hydraulic Power Unit:

365C L MHPU (S/N: GSZ1-UP)

385C MHPU (S/N: MSF1-UP)

CIPI (S/N: 0EM1-UP)

Service Magazine SEPD0930, 03 March 2008, "A New Holding Bracket for the Muffler Is Now Used". Disregard this article. See the article that follows.

Description of Change: New assemblies in the muffler group are stronger. The improved assemblies increase the resistance to vibration. The decreased amplitude of the vibration eliminates the failure of the plates in the support assembly for the muffler.

Adaptable To: The new assemblies and the former assemblies are listed in Table 2, Table 3, and Table 4. The effectivity and the adaptability of the new components in the muffler group are listed in Table 1.

The locations of the new components are shown in the illustrations. Install new assemblies in the muffler group if the former assemblies fail.

Table 1

Effectivity Of The New Assemblies In The Muffler Group
Model	Effectivity	Adaptability
365C L	S/N:ELC374	S/N:ELC1-373
	S/N:MEM275	S/N:MEM1-274
	S/N:FEN144	S/N:FEN1-143
	S/N:MCS451	S/N:MCS1-450
	S/N:MCY432	S/N:MCY1-431
365C L MH	S/N:GWC229	S/N:GWC1-228
365C L FS	S/N:PAR268	S/N:PAR1-267
365C L MHPU	S/N:GSZ131	S/N:GSZ1-130
385C	S/N:KBC241	S/N:KBC1-240
	S/N:KKK195	S/N:KKK1-194
	S/N:JCM179	S/N:JCM1-178
	S/N:MNZ158	S/N:MNZ1-157
385C L	S/N:EDA457	S/N:EDA1-456
	S/N:KGB405	S/N:KGB1-404
	S/N:SBE291	S/N:SBE1-290
	S/N:T2E342	S/N:T2E1-341
385C L MH	S/N:WAW221	S/N:WAW1-220
385C FS	S/N:MMA259	S/N:MMA1-258
	S/N:T2F189	S/N:T2F1-188
	S/N:EAM286	S/N:EAM1-285
385C MHPU	S/N:MSF110	S/N:MSF1-109
CIPI	-	S/N:0EM443 S/N:0EM649 S/N:0EM970-971 S/N:0EM1113 S/N:0EM1148 S/N:0EM1312-1313 S/N:0EM1397 S/N:0EM1404 S/N:0EM1417 S/N:0EM1429 S/N:0EM1479 S/N:0EM1539 S/N:0EM1674-1675 S/N:0EM1682 S/N:0EM1839 S/N:0EM1887 S/N:0EM1891 S/N:0EM1960-1961 S/N:0EM1972-1973

365C Excavators

The following information describes the improvements in the muffler group. Refer to Table 2 for the components and refer to Illustration 1, Illustration 2, and Illustration 3 for the locations of the components.

Table 2

New Assemblies For 365C Excavators
Item	Qty	New Part Number	Description	Former Part Number
1	1	310-9759	Plate As	279-7853
2	1	310-9692	Bracket As	266-6181
3	1	310-9504	Plate	279-7788
4	3	8X-1386	Spacer	091-9035
5	7	8T-4138	Bolt	8T-4908
6	1	6V-7357	Bolt	8T-4908
7	8	5P-4115	Hard Washer	8T-4224
8	1	5I-8748	Spacer	6W-2928
Reusable Components From The Muffler Group
9	2	-	Hard Washer	8T-4223
10	2	-	Bolt	8T-4956
11	7	-	Spacer	205-6716
12	7	-	Bolt	8T-2501
13	3	-	Bolt	4L-9337
14	4	-	Hard Washer	8T-4896
15	1	-	Bolt	7X-0289
16	1	-	Clip	1B-3057

Illustration 1	g01528740
New Plate And New Plate Assembly (1) 310-9759 Plate As (3) 310-9504 Plate (5) 8T-4138 Bolt (7) 5P-4115 Hard Washer

Illustration 2	g01528742
New Bracket Assembly And Muffler (2) 310-9692 Bracket As (9) 8T-4223 Hard Washer (10) 8T-4956 Bolt (11) 205-6716 Spacer (12) 8T-2501 Bolt

Illustration 3	g01528744
New Plate And New Bracket Assembly (4) 8X-1386 Spacer (6) 6V-7357 Bolt (7) 5P-4115 Hard Washer (8) 5I-8748 Spacer (13) 4L-9337 Bolt (14) 8T-4896 Hard Washer (15) 7X-0289 Bolt (16) 1B-3057 Clip

385B Excavators

The following information describes the improvements in the muffler group. Refer to Table 3 for the components and refer to Illustration 4 and Illustration 5 for the locations of the components.

Table 3

New Support Assembly For 385B Excavators
Item	Qty	New Part Number	Description	Former Part Number
17	1	310-9768	Support As	233-1314
18	1	7X-2537	Bolt	8T-4908
19	3	4L-6459	Bolt	8T-2501
20	1	242-1260	Spacer	-
Reusable Components From The Muffler Group
21	1	-	Plate	233-1292
22	3	-	Hard Washer	8T-4224
23	3	-	Spacer	217-5449
24	2	-	Bolt	8T-4908

Illustration 4	g01528650
New Components In The Muffler Group (17) 310-9768 Support As (19) 4L-6459 Bolt (21) 233-1292 Plate (22) 8T-4224 Hard Washer (23) 217-5449 Spacer (24) 8T-4908 Bolt

Illustration 5	g01528748
Right Hand View Of The Engine (18) 7X-2537 Bolt (20) 242-1260 Spacer (21) 233-1292 Plate (22) 8T-4224 Hard Washer

385C Excavators

The following information describes the improvements in the muffler group. Refer to Table 4 for the components and refer to Illustration 6 through Illustration 9.

Table 4

New Assemblies For 385C Excavators
Item	Qty	New Part Number	Description	Former Part Number
3	1	310-9504	Plate	279-7788
4	1	8X-1386	Spacer	091-9035
5	7	8T-4138	Bolt	8T-4908
6	1	6V-7357	Bolt	8T-4908
7	8	5P-4115	Hard Washer	8T-4224
8	1	5I-8748	Spacer	6W-2928
24	3	8T-4908	Bolt	8T-4189
25	1	310-9760	Plate As	279-7791
26	1	310-9513	Bracket As	233-1177
Reusable Components From The Muffler Group
9	2	-	Hard Washer	8T-4223
10	2	-	Bolt	8T-4956
11	7	-	Spacer	205-6716
12	7	-	Bolt	8T-2501
13	3	-	Bolt	4L-9337
14	4	-	Hard Washer	8T-4896
15	1	-	Bolt	7X-0289
16	1	-	Clip	1B-3057
29	2	-	Spacer	217-5449
30	3	-	Hard Washer	5P-5116

Illustration 6	g01529413
New Plate And New Plate Assembly (3) 310-9504 Plate (5) 8T-4136 Bolt (7) 5P-4115 Hard Washer (25) 310-9760 Plate As

Illustration 7	g01529433
New Bracket Assembly And Muffler (9) 8T-4223 Hard Washer (10) 8T-4956 Bolt (11) 205-6716 Spacer (12) 8T-2501 Bolt (26) 310-9513 Bracket As

Illustration 8	g01529434
New Plate And New Bracket Assembly (4) 8X-1386 Spacer (6) 6V-7357 Bolt (7) 5P-4115 Hard Washer (8) 5I-8748 Spacer (13) 4L-9337 Bolt (14) 8T-4896 Hard Washer (15) 7X-0289 Bolt (16) 1B-3057 Clip

Illustration 9	g01529437
Exhaust Cover (15) 7X-0289 Bolt (24) 8T-4908 Bolt (25) 310-9760 Plate As (29) 217-5449 Spacer (30) 5P-4116 Hard Washer (C) Cover assembly