3Y4273 POWERSHIFT TRANSMISSION ARRANGEMENT--Part 1 of 2 Effective with Serial No. 78G3429~78G3562 Magnetic Screen, 1P4231 Pump Group and Transmission parts are shown on Pages 156 thru 158 966C

POWER TRAIN

TRANSMISSION GP

0. 3Y-4273 POWERSHIFT
1. 3Y-4273 POWERSHIFT
2. 3Y-4273 TRANSMISSI
3. 3Y-4273 TRANSMISSI

TORQUE CONVERTER GP

4. 5S-4360 TORQUE CON
5. 1T-0408 TORQUE CON

TRANSMISSION GP

6. 5S-4447 SCREEN GP-

FILTER GP

7. 2S-6457 FILTER GP-

PUMP GP

8. 1P-4231 TRANSMISSI

COOLER GP

9. 6K-5450 LINES GP-T
0. INFORMATION

WHEEL LOADER 966C WHEEL LOADER 78G
966C WHEEL LOADER 78G02871-UP (MACHINE) POWERED BY 3306 ENGINE XMBP9669 966C 78G (1980)

POWER TRAIN

TRANSMISSION GP

3Y-4273 POWERSHIFT TRANSMISSION ARRANGEMENT

3Y-4273 TRANSMISSION ARRANGEMENT

#XMBP96690260

3Y-4273: POWERSHIFT TRANSMISSION ARRANGEMENT

POWERSHIFT TRANSMISSION ARRANGEMENT

3Y4273 POWERSHIFT TRANSMISSION ARRANGEMENT--Part 1 of 2
Effective with Serial No. 78G3429~78G3562
Magnetic Screen, 1P4231 Pump Group and Transmission
parts are shown on Pages 156 thru 158

j17039e XMBP9669

3Y4273 POWERSHIFT TRANSMISSION ARRANGEMENT Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	Y	[1]	MAGNETIC SCREEN
			(See Separate Illustration)
2.	1P-4231 Y	[1]	PUMP GROUP
			(See Separate Illustration)
3.	Y	[1]	TRANSMISSION
			(See Separate Illustration)
4.	0S-1587 H	[2]	BOLT
5.	6K-2717 H	[1]	TUBE ASSEM.
6.	0S-1594 H	[1]	BOLT
7.	3B-4506 H	[16]	LOCKWASHER
8.	5M-8429 H	[1]	CLIP
9.	6K-2718 H	[1]	PLUNGER ASSEM. (English)
	3Y-0340 H	[1]	PLUNGER ASSEM. (Japanese)
10.	5K-0376 H	[2]	CLAMP
11.	5K-1568 H	[1]	CAP
	6H-5139 H	[1]	PLATE
	7B-6368 H	[1]	BALL
12.	6F-5188 H	[1]	GASKET
13.	0L-1351 H	[1]	BOLT
	1D-4717 H	[1]	NUT
14.	2V-7299 H	[1]	TUBE ASSEM.
15.	5P-0597 H	[2]	CLAMP
16.	8M-5299 H	[1]	HOSE
17.	4V-2993 CH	[1]	TUBE ASSEM.
18.	1P-3705 CH	[1]	SEAL
19.	0S-1591 H	[2]	BOLT
20.	4K-5537 H	[1]	GASKET
21.	1V-3995 H	[2]	PIN
22.	7N-1164 CH	[2]	MOUNT ASSEM.
23.	0L-1178 H	[8]	BOLT
24.	3B-4512 H	[8]	LOCKWASHER
25.	3V-5762 CH	[2]	SUPPORT ASSEM.
26.	1A-2029 H	[12]	BOLT
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION
	H		NOT PART OF 3Y4273 POWER SHIFT

#XMBP96690261

3Y-4273: POWERSHIFT TRANSMISSION ARRANGEMENT

POWERSHIFT TRANSMISSION ARRANGEMENT

3Y4273 POWERSHIFT TRANSMISSION ARRANGEMENT--Part 2 of 2
Effective with Serial No. 78G3429~78G3562
Torque Converter and Filter parts are shown on
Pages 154 and 156

j17040e XMBP9669

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-4355	[1]	MANIFOLD ASSEM.
2.	4H-9304	[4]	STUD
3.	7B-3235	[3]	BOLT
4.	3B-4508	[7]	LOCKWASHER
5.	8M-5254	[1]	SEAL
6.	8M-5248	[1]	SEAL
7.	8M-5010 C	[1]	SEAL
8.	0S-1588	[4]	BOLT
9.	3B-4506 C	[4]	LOCKWASHER
10.	4B-4278	[2]	WASHER
11.	1D-4717	[2]	NUT
12.	8M-5007	[1]	SEAL
13.	8M-4992	[1]	SEAL
14.	8M-4987	[1]	SEAL
15.	8S-6380	[1]	TUBE ASSEM.
16.	0S-1571	[2]	BOLT
17.	Y	[1]	TORQUE CONVERTER
			(See Separate Illustration)
18.	8M-4432	[2]	SEAL
19.	1B-4205	[4]	NUT
20.	Y	[1]	FILTER GROUP
			(See Separate Illustration)
21.	8M-4443	[2]	SEAL
22.	5P-7084 C	[2]	SEAL
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#XMBP96690262

3Y-4273: TRANSMISSION ARRANGEMENT

TRANSMISSION ARRANGEMENT

3Y4273 TRANSMISSION ARRANGEMENT--Part 1 of 2
Effective with Serial No. 78G3563-UP
Magnetic Screen, 1P4231 Pump Group and Transmission
parts are shown on Pages 156, 157 and 159A

j17431e XMBP9669

3Y4273 TRANSMISSION ARRANGEMENT Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	Y	[1]	MAGNETIC SCREEN
			(See Separate Illustration)
2.	1P-4231 Y	[1]	PUMP GROUP
			(See Separate Illustration)
3.	Y	[1]	TRANSMISSION
			(See Separate Illustration)
4.	0S-1587 H	[2]	BOLT
5.	6K-2717 H	[1]	TUBE ASSEM.
6.	5M-8429 H	[1]	CLIP
7.	6K-2718 H	[1]	PLUNGER ASSEM. (English)
	3Y-0340 H	[1]	PLUNGER ASSEM. (Japanese)
8.	5K-0376 H	[2]	CLAMP
9.	068-4497 CH	[1]	CAP
10.	8S-5820 CH	[1]	BRETHER
11.	0L-1351 H	[1]	BOLT
12.	1D-4717 H	[1]	NUT
13.	3B-4506 H	[16]	LOCKWASHER
14.	5V-0582 CH	[1]	TUBE ASSEM.
15.	0S-1594 H	[1]	BOLT
16.	5P-0597 H	[2]	CLAMP
17.	8M-5299 H	[1]	HOSE
18.	4V-2993 H	[1]	TUBE ASSEM.
	1P-3705 H	[1]	SEAL
19.	0S-1591 H	[2]	BOLT
20.	4K-5537 H	[1]	GASKET
21.	1V-3995 H	[2]	PIN
22.	7N-1164 H	[2]	MOUNT ASSEM.
23.	0L-1178 H	[8]	BOLT
24.	3B-4512 H	[8]	LOCKWASHER
25.	3V-5762 H	[2]	SUPPORT ASSEM.
26.	1A-2029 H	[12]	BOLT
	H		NOT PART OF 3Y4273 TRANSMISSIO
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE

#XMBP96690263

3Y-4273: TRANSMISSION ARRANGEMENT

TRANSMISSION ARRANGEMENT

3Y4273 TRANSMISSION ARRANGEMENT--Part 2 of 2
Effective with Serial No. 78G3563-UP
Torque Converter and Filter parts are shown on Pages
154 and 156

j17432e XMBP9669

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-4355	[1]	MANIFOLD ASSEM.
2.	4H-9304	[4]	STUD
3.	7B-3235	[3]	BOLT
4.	3B-4508	[7]	LOCKWASHER
5.	8M-5254	[1]	SEAL
6.	8M-5248	[1]	SEAL
7.	8M-5010 C	[1]	SEAL
8.	0S-1588	[4]	BOLT
9.	3B-4506 C	[4]	LOCKWASHER
10.	4B-4278	[2]	WASHER
11.	1D-4717	[2]	NUT
12.	8M-5007	[1]	SEAL
13.	8M-4992	[1]	SEAL
14.	8M-4987	[1]	SEAL
15.	8S-6380	[1]	TUBE ASSEM.
16.	0S-1571	[2]	BOLT
17.	Y	[1]	TORQUE CONVERTER
			(See Separate Illustration)
18.	8M-4432	[2]	SEAL
19.	1B-4205	[4]	NUT
20.	Y	[1]	FILTER GROUP
			(See Separate Illustration)
21.	8M-4443	[2]	SEAL
22.	5P-7084 C	[2]	SEAL
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#XMBP96690264

5S-4360: TORQUE CONVERTER

TORQUE CONVERTER

TORQUE CONVERTER (5S4360 N/S)
Effective with Serial No. 78G2871-UP
Part of 3Y4273 Powershift Transmission Arrangement
1T408 Converter Assembly parts are shown on Page
155

j10463e XMBP9669

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9M-8269	[1]	SHAFT
2.	2P-1995	[1]	COVER ASSEM.
	1H-9720	[1]	PLUG
3.	9S-8008	[2]	PLUG
	3D-2824	[2]	SEAL
4.	2A-4639	[5]	BOLT
5.	5M-2894	[12]	WASHER
6.	3K-0526	[1]	BEARING
7.	0S-1594	[6]	BOLT
8.	3B-4506	[20]	LOCKWASHER
9.	3K-0556	[1]	RETAINER
10.	1S-3716	[1]	COVER
11.	3K-1068	[1]	GEAR (48 Teeth)
12.	1S-3715	[1]	GASKET
13.	5M-6200	[1]	SEAL
14.	0S-1588	[4]	BOLT
15.	1T-0408 Y	[1]	CONVERTER ASSEM.
			(See Separate Illustration)
16.	1C-2251	[7]	BOLT
17.	1F-2771	[1]	BEARING
18.	5S-6980	[1]	RING
19.	0L-2070	[14]	BOLT
20.	7F-6894	[2]	LOCK
21.	2K-5967	[1]	RING
22.	2H-3088	[1]	SEAL
24.	5S-7887	[1]	GEAR (50 Teeth)
25.	5S-7888	[1]	RETAINER
26.	5S-7886	[1]	GEAR (50 Teeth)
27.	1T-0537	[1]	RETAINER
28.	0S-1584	[1]	BOLT
29.	7S-4571	[1]	SEAL
30.	5H-6199	[1]	RING
31.	8M-5253	[1]	SEAL
	Y		SEPARATE ILLUSTRATION

#XMBP96690265

1T-0408: TORQUE CONVERTER ASSEMBLY

TORQUE CONVERTER ASSEMBLY

1T408 TORQUE CONVERTER ASSEMBLY
Effective with Serial No. 78G2871-UP
Part of Torque Converter

j15700e XMBP9669

1T0408 TORQUE CONVERTER ASSEMBLY Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Part No	Qty	Parts name
1T-0020	[1]	WHEEL (TURBINE)
1T-0407	[1]	WHEEL ASSEM. (GUIDE)
1T-0094	[1]	PLATE
7B-3028	[2]	SCREW
0T-0102	[6]	BOLT
1T-0542	[1]	BEARING
7M-5130	[1]	PIN
1T-0541	[1]	PILOT
0S-1584	[1]	BOLT
1T-0537	[1]	RETAINER
1T-0068	[4]	PIN (952mm DIAMETER)
1T-0289	[4]	PIN (556mm DIAMETER)
1T-0294	[1]	RING
1T-0024	[1]	HOUSING
2B-2695	[24]	BOLT
1T-0738	[24]	WASHER
1T-0032	[2]	PLATE
1A-2343	[8]	BOLT
1T-0555	[1]	CARRIER
1T-1313 C	[1]	RING
1T-0205	[1]	RING
1T-1314 C	[1]	SHAFT
1T-0210	[1]	BEARING
1T-0013	[1]	RING
1T-0015	[1]	SLEEVE
1T-0553	[1]	GEAR ASSEM. (41 TEETH)
1T-0544	[1]	BEARING
		(PART OF GEAR ASSEM. 1T553)
1T-0290	[2]	PLATE
1T-0414	[6]	BOLT
1T-0406	[1]	WHEEL (IMPELLER)
C		INDICATES OF CHANGE

#XMBP96690266

5S-4447: SCREEN GP-MAGNETIC

SCREEN GP-MAGNETIC

MAGNETIC SCREEN (5S4447 N/S)
Effective with Serial No. 78G2871--UP
Part of 3Y4273 Powershift Transmission Arrangement

c110419 XMBP9669

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1D-4717	[4]	NUT
2.	3S-3439	[1]	COVER
3.	3S-3440	[1]	SPRING WASHER
4.	5F-0149	[1]	SEAL
5.	4S-8603	[1]	TUBE ASSEM.
6.	8M-7160	[3]	MAGNET
			(Part of 4S8603 Tube Assem.)
7.	5S-4329	[1]	HOUSING ASSEM.
8.	8M-1871	[2]	STUD
9.	3D-2871	[4]	STUD
			(Parts of 5S4329 Housing Assem.)
10.	4S-8598	[1]	SCREEN

#XMBP96690267

2S-6457: FILTER GP-TRANSMISSION

FILTER GP-TRANSMISSION

TRANSMISSION FILTER (2S6457 N/S)
Effective with Serial No. 78G2871--UP
Part of 3Y4273 Powershift Transmission Arrangement

j15657e XMBP9669

2S6457 FILTER GP-TRANSMISSION Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1P-9600	[1]	SPOOL
2.	9M-1986	[1]	SPRING
3.	9S-8008	[1]	PLUG
	3D-2824	[1]	SEAL
4.	2H-3928	[1]	SEAL
5.	7S-8700	[1]	COVER ASSEM.
6.	3S-4398	[1]	STUD
7.	9S-4191	[1]	PLUG
8.	7B-3235	[6]	BOLT
9.	3J-1907	[1]	SEAL
10.	5K-1770	[1]	SEAL
11.	2H-3788	[1]	NUT
12.	9S-4205	[1]	PLUG
13.	7M-8485	[1]	SEAL
14.	8F-8882	[2]	SEAL
15.	2S-6462	[1]	RETAINER
16.	2P-2042	[1]	HOUSING
17.	9M-9740	[1]	ELEMENT ASSEM. (Disposable)

#XMBP96690268

1P-4231: TRANSMISSION PUMP GROUP

TRANSMISSION PUMP GROUP

1P4231 TRANSMISSION PUMP GROUP
Effective with Serial No. 78G2871--UP
Part of 3Y4273 Powershift Transmission Arrangement

j10273e XMBP9669

1P4231 TRANSMISSION PUMP GROUP Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-4385	[1]	BODY ASSEM.
2.	8M-8489	[4]	DOWEL
3.	4L-6459	[2]	BOLT
4.	3S-0004	[6]	WASHER
5.	1P-4230	[1]	GEAR (12 Teeth)
6.	2S-1454	[1]	COVER ASSEM.
7.	1M-3780	[2]	BEARING
8.	0L-2070	[4]	BOLT
9.	9S-4191	[1]	PLUG
	3J-1907	[1]	SEAL
10.	5S-4383	[1]	GEAR (12 Teeth)
11.	8M-5007	[2]	SEAL
12.	5S-4358	[1]	COVER ASSEM.
13.	8M-8489	[2]	DOWEL
14.	2M-3868	[2]	BEARING

#XMBP96690269

6K-5450: LINES GP-TORQUE CONV COOLER

LINES GP-TORQUE CONV COOLER

TORQUE CONVERTER COOLER LINES (6K5450 N/S)
Effective with Serial No. 78G2871--UP

j14880e XMBP9669

6K5450 LINES GP-TORQUE CONV COOLER Parts scheme

For full view, you need register

Parts for your 966C WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4F-7391 C	[1]	SEAL
2.	0S-1571 C	[4]	BOLT
3.	3B-4506 C	[10]	LOCKWASHER
4.	8K-8389	[1]	TUBE ASSEM
5.	9S-4191	[1]	PLUG
	3J-1907	[1]	SEAL
6.	0S-1588	[2]	BOLT
7.	6K-2171	[2]	FLANGE
8.	1A-2029	[4]	BOLT
9.	3H-1461	[1]	SEAL
10.	6K-2172	[1]	ELBOW
11.	8M-5266	[2]	SEAL
12.	2V-9143 C	[1]	TUBE ASSEM
13.	0S-1591 C	[4]	BOLT
14.	1P-3703 C	[1]	SEAL
	C		INDICATES CHANGE