2P6272 CONNECTING ROD AND PISTON GROUP--6 Required Serial No. 66D8891 to 66D11325 inclusive Part of 3N3209 Basic Engine Arrangement listed on Page 16 3306

BASIC ENGINE

PISTON & ROD GP

0. 2P-6272 PISTON & R
1. 2P-6272 PISTON & R

CAMSHAFT GP

2. 2P-6202 CAMSHAFT G

CYLINDER HEAD GP

3. 4N-7446 CYLINDER H
4. 3N-3916 CYLINDER H
5. 2P-6530 COVER GP-C
6. 3N-2892 CYLINDER H
7. 2P-6546 FASTENER G

VALVE MECHANISM GP

8. 2P-6526 VALVE-MECH
9. 3N-2891 COVER GP-V
0. INFORMATION

INDUSTRIAL ENGINE 3306 INDUSTRIAL ENGINE 66D
3306 ENGINE 66D08891-12369 UEG0688S 3306 66D (1972)

BASIC ENGINE

PISTON & ROD GP

2P-6272 PISTON & ROD GP

#UEG0688S0030

2P-6272: PISTON & ROD GP

PISTON & ROD GP

2P6272 CONNECTING ROD AND PISTON GROUP--6 Required
Serial No. 66D8891 to 66D11325 inclusive
Part of 3N3209 Basic Engine Arrangement listed on Page 16

c117431 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8M-6487	[1]	PIN
2.	1S-9543	[2]	RETAINER
3.	5S-2793	[1]	ROD ASSEM.
	7S-9348	[1]	BEARING
4.	1P-9956	[2]	BOLT
	5S-6348	[2]	NUT
5.	7M-7821	[1]	BEARING (Standard)
	2S-0502	[1]	BEARING (.010" Undersize)
	2S-0503	[1]	BEARING (.020" Undersize)
	7M-7826	[1]	BEARING (.030" Undersize)
6.	2P-6271	[1]	PISTON GROUP
7.	9S-7788	[1]	RING (Oil)
8.	5S-6750	[1]	RING (Intermediate)
9.	7S-8378	[1]	RING (Top)
	7S-9404	[1]	RING GROUP
			(Consists of Complete Set of Rings For One Piston)

#UEG0688S0031

2P-6272: PISTON & ROD GP

PISTON & ROD GP

2P6272 CONNECTING ROD & PISTON GROUP--6 Required
Serial No. 66D11326-Up

c222694 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-9805 C	[1]	PIN-PISTON
2.	1S-9543	[2]	RETAINER-PIN
3.	5S-2793	[1]	ROD AS
	8N-0703 C	[1]	BEARING
4.	1P-9956	[2]	BOLT-CONNECTING ROD
	5S-6348	[2]	NUT-SPECIAL
5.	7M-7821	[1]	BEARING-CONNECTING ROD
	2S-0502	[1]	BEARING-.254MM US (.010IN)
	2S-0503	[1]	BEARING-.508MM US (.020IN)
	7M-7826	[1]	BEARING-.762MM US (.030IN)
6.	4N-9258 C	[1]	PISTON GP
7.	9S-7788	[1]	RING-PISTON OIL
8.	5S-6750	[1]	RING-INTERMEDIATE
9.	9S-3029	[1]	RING-PISTON TOP
	9S-3068 C	[1]	RING GP
			(CONSISTS OF COMPLETE
			SET OF RINGS FOR
			ONE PISTON)
	C		CHANGE FROM PREVIOUS TYPE

#UEG0688S0032

2P-6202: CAMSHAFT GP-SINGLE

CAMSHAFT GP-SINGLE

2P6202 CAMSHAFT GROUP
Part of 3N3209 Basic Engine Arrangement listed on Page 16
Only separate parts serviced

c117078 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-3972	[1]	CAMSHAFT
2.	7S-2204	[1]	WASHER
3.	8S-1491	[1]	LOCK
4.	0S-0509	[2]	BOLT

#UEG0688S0033

4N-7446: CYLINDER HEAD AS

CYLINDER HEAD AS

4N7446 CYLINDER HEAD ASSEMBLY
Part of 3N3916 Cylinder Head Group shown on Page 26

c204124 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1S-3062	[18]	DIRECTOR
2.	2B-0858 C	[3]	PLUG
3.	3B-0623	[6]	PLUG
4.	3S-8313	[7]	PLUG
5.	1P-6367	[1]	COVER
6.	5S-6735	[1]	GASKET
7.	0S-1594	[4]	BOLT
	3B-4506	[4]	LOCKWASHER
8.	2P-1262	[12]	GUIDE
9.	2P-6497	[1]	HEAD ASSEM.
10.	5S-7218	[6]	INSERT (Intake)
11.	5S-7221	[6]	INSERT (Exhaust)
	C		INDICATES CHANGE

#UEG0688S0034

3N-3916: CYLINDER HEAD GP

CYLINDER HEAD GP

3N3916 CYLINDER HEAD GROUP
Part of 3N3209 Basic Engine Arrangement listed on Page 16. 4N7446 Cylinder Head parts are shown on Page 25
Only separate parts serviced

c146576 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7S-8809 C	[6]	VALVE (Intake)
2.	2A-4429	[24]	LOCK
3.	5S-5912	[12]	RETAINER
4.	7S-7144	[12]	SPRING
5.	8S-3970	[6]	CHAMBER ASSEM.
	7S-3206	[6]	SEAL
	2S-8966	[6]	KIT (Gasket)
6.	7S-6767 C	[6]	VALVE (exhaust)
7.	4N-7446 Y	[1]	HEAD ASSEM.
			(Separate Illustration)
8.	5S-6281	[1]	GASKET
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#UEG0688S0035

2P-6530: COVER GP-CYLINDER HEAD

COVER GP-CYLINDER HEAD

2P6530 CYLINDER HEAD COVER GROUP
Part of 3N3209 Basic Engine Arrangement listed on Page 16

c218681 UEG0688S

2P6530 COVER GP-CYLINDER HEAD Parts scheme

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1P-6367	[1]	COVER
	5S-6735	[1]	GASKET
2.	2P-3201	[4]	BOLT (Washer Head)
			-OR-
	0S-1594	[4]	BOLT (1 in.) long
	5M-2894	[4]	WASHER

#UEG0688S0036

3N-2892: CYLINDER HEAD FASTENER GROUP

CYLINDER HEAD FASTENER GROUP

3N2892 CYLINDER HEAD FASTENER GROUP
Part of 3N3209 Basic Engine Arrangement listed on Page 16

c117685 UEG0688S

3N2892 CYLINDER HEAD FASTENER GROUP Parts scheme

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1A-5183	[7]	BOLT
	5B-3850	[7]	WASHER
2.	1B-7709	[6]	BOLT (Location X)
3.	2S-0736	[26]	WASHER
4.	1D-4595	[18]	BOLT
5.	8F-1635	[2]	BOLT

#UEG0688S0037

2P-6546: FASTENER GP-CYLINDER HEAD

FASTENER GP-CYLINDER HEAD

2P6546 CYLINDER HEAD FASTENER GROUP

c222689 UEG0688S

2P6546 FASTENER GP-CYLINDER HEAD Parts scheme

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1A-5964 CB	[7]	BOLT 11.4CM(4.50IN)
2.	1B-7709	[6]	BOLT (LOCATION X)
	2S-0736	[6]	WASHER-HARD
3.	1D-4595	[20]	BOLT
	2S-0736	[20]	WASHER-HARD
4.	5B-2638 CB	[1]	BOLT
	B		USE AS REQUIRED
	C		CHANGE FROM PREVIOUS TYPE

#UEG0688S0038

2P-6526: VALVE-MECHANISM GP

VALVE-MECHANISM GP

2P6526 VALVE MECHANISM GROUP

c207986 UEG0688S

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Parts for your 3306 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9S-9203	[1]	SHAFT ASSEM.
	0L-1026	[2]	PLUG (.50 in. Diameter)
2.	5S-5879	[1]	BRACKET
	5M-4606	[1]	DOWEL
3.	4B-4910	[5]	SPRING
4.	9H-1110	[12]	WASHER
5.	5S-5879 C	[4]	BRACKET
6.	5S-6855	[6]	ARM ASSEM. (Exhaust)
7.	5S-6854	[6]	ARM ASSEM. (Intake)
8.	8S-1499	[1]	BRACKET ASSEM.
	3F-6795	[1]	DOWEL
9.	9M-9886	[2]	WASHER
	9H-1112	[2]	SPRING
10.	1B-4203	[12]	NUT
11.	5S-5917 C	[12]	SCREW
12.	5S-5918	[12]	ROD
13.	7S-3161	[12]	LIFTER
14.	9H-1113	[2]	RING
	C		INDICATES CHANGE