8N5007 CONNECTING ROD AND PISTON GROUP--6 Required Engine Serial No. 3N76795 to 3N78126 inclusive 235

BASIC ENGINE

PISTON & ROD GP

0. 8N-5007 CONNECTING

CAMSHAFT GP

1. 2P-6202 CAMSHAFT G

CRANKSHAFT GP

2. 2P-6222 CRANKSHAFT
3. 4N-7693 CRANKSHAFT
4. 6N-8079 CRANKSHAFT
5. 2P-6224 SEAL GP-CR
6. CRANKSHAFT
7. CRANKSHAFT

CYLINDER HEAD GP

8. 2P-6486 CYLINDER H
9. 7N-8536 CYLINDER H
0. INFORMATION

EXCAVATOR 235 EXCAVATOR 81X
235 EXCAVATOR 81X00001-UP (MACHINE) POWERED BY 3306 ENGINE SEBP1212 235 81X (1978)

BASIC ENGINE

PISTON & ROD GP

2P-6272 PISTON & ROD GP

8N-5007 CONNECTING ROD AND PISTON GROUP

#SEBP12120010

8N-5007: CONNECTING ROD AND PISTON GROUP

CONNECTING ROD AND PISTON GROUP

8N5007 CONNECTING ROD AND PISTON GROUP--6 Required
Engine Serial No. 3N76795 to 3N78126 inclusive

c223271 SEBP1212

8N5007 CONNECTING ROD AND PISTON GROUP Parts scheme

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-9805	[1]	PIN
2.	1S-9543	[2]	RETAINER
3.	6N-8069	[1]	ROD ASSEM.
	8N-0703	[1]	BEARING
4.	1P-9956	[2]	BOLT
	5S-6348	[2]	NUT
5.	4N-6258	[1]	BEARING (Standard)
	2S-0502	[1]	BEARING (.010" Undersize)
	2S-0503	[1]	BEARING (.020" Undersize)
	7M-7826	[1]	BEARING (.030" Undersize)
6.	4N-9258	[1]	PISTON GROUP
7.	9S-7788	[1]	RING (Oil)
8.	5S-6750	[1]	RING (intermediate)
9.	9S-3029	[1]	RING (top)
	9S-3068	[1]	RING GROUP
			(Consists of Complete Set of Rings For One Piston)

#SEBP12120011

2P-6202: CAMSHAFT GP-SINGLE

CAMSHAFT GP-SINGLE

2P6202 SINGLE CAMSHAFT GROUP

c117078 SEBP1212

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Parts for your 235 EXCAVATOR:

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

#SEBP12120012

2P-6222: CRANKSHAFT GP

CRANKSHAFT GP

2P6222 CRANKSHAFT GROUP
Engine Serial No. 3N56149 to 3N79762 inclusive
Note: For Field Replacement of 4N7697 Crankshaft Assembly order 4N7693

c210404 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6N-8940 C	[2]	PLATE-THRUST
2.	4N-7697	[1]	CRANKSHAFT AS
3.	9F-2247	[6]	PLUG
4.	3S-9730	[7]	BEARING-CRANKSHAFT
	C		CHANGE FROM PREVIOUS TYPE

#SEBP12120013

4N-7693: CRANKSHAFT AS

CRANKSHAFT AS

4N7693 CRANKSHAFT GROUP--Field Installation

c202604 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2P-3858	[1]	SLEEVE
2.	9F-2247	[6]	PLUG
3.	5H-2671	[1]	KEY
4.	4M-9933	[1]	GEAR (40 teeth)
5.	2P-3859	[1]	SLEEVE

#SEBP12120014

6N-8079: CRANKSHAFT GP

CRANKSHAFT GP

6N8079 CRANKSHAFT GROUP
Engine Serial No. 3N79763--Up
Note: For field replacement of 4N7697 Crankshaft Assembly order 4N7693
shown on Page 9

c172107 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-9342	[2]	PLATE
2.	4N-7697 C	[1]	CRANKSHAFT ASSEM.
			(Includes)
3.	9F-2247	[6]	PLUG
4.	3S-9730	[7]	BEARING
	C		INDICATES CHANGE

#SEBP12120015

2P-6224: SEAL GP-CRANKSHAFT

SEAL GP-CRANKSHAFT

2P6224 CRANKSHAFT SEAL GROUP

c117254 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9S-3111	[ 1]	SEAL
2.	2P-3858	[ 1]	SLEEVE
3.	5S-6296	[ 1]	SEAL
4.	2P-3859	[ 1]	SLEEVE

#SEBP12120016

CRANKSHAFT BEARING REPLACEMENTS

SEBP12120016 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
4S-8881	[7]	BEARING (.010 Undersize)
4S-8883	[7]	BEARING (.020 Undersize)
4S-8885	[7]	BEARING (.030 Undersize)
		BEARINGS FOR REBORED CYLINDER BLOCK
6N-3822	[7]	BEARING MAIN (.020 Oversize And .010 Undersize)
6N-3823	[7]	BEARING MAIN (.020 Oversize)

#SEBP12120017

CRANKSHAFT SERVICE THRUST PLATE

CRANKSHAFT SERVICE THRUST PLATE--Field Installation
Engine Serial No. 3N56149 to 3N79762 inclusive. Provides a Thrust Plate to be used
in the event "Wide-Thrust Journal Crankshaft is installed in spacer plate Cylinder Block

SEBP12120017 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name	Comments
	7N-9343	[1]	THRUST PLATE

#SEBP12120018

2P-6486: CYLINDER HEAD GP

CYLINDER HEAD GP

2P6486 CYLINDER HEAD GROUP
Engine Serial No. 3N56149 to 3N79762 inclusive

c216924 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7S-7144	[12]	SPRING
2.	5S-5874	[12]	ROTOCOIL
3.	2A-4429	[24]	LOCK
4.	6N-8120 C	[1]	HEAD ASSEM.
			(Includes)
5.	0S-1594	[4]	BOLT
6.	5M-2894	[4]	WASHER
7.	1P-6367	[1]	COVER
8.	5S-6735	[1]	GASKET
9.	3B-0623	[6]	PLUG
10.	3S-8313	[7]	PLUG
11.	1S-3062	[18]	DIRECTOR
12.	2B-0858	[3]	PLUG
13.	7N-4448	[6]	INSERT (intake)
14.	5S-7221	[6]	INSERT (exhaust)
15.	2P-1262	[12]	GUIDE
16.	5M-2667	[6]	GASKET 4.93 mm(.194 in.) thick
	2S-8959	[6]	GASKET 5.66 mm(.223 in.) thick
	2S-8960	[6]	GASKET 6.3 mm(.248 in.) thick
17.	7S-3206	[6]	SEAL
18.	8S-3970	[6]	CHAMBER ASSEM.
19.	6N-7263 C	[1]	GASKET
20.	5S-6452	[6]	VALVE (intake)
21.	5S-7232	[6]	VALVE (exhaust)
	C		INDICATES CHANGE

#SEBP12120019

7N-8536: CYLINDER HEAD GP

CYLINDER HEAD GP

7N8536 CYLINDER HEAD GROUP
Engine Serial No. 3N79763--Up
8N1187 Head parts are shown on Page 11B

c223141 SEBP1212

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7S-7144	[12]	SPRING
2.	5S-5874	[12]	ROTOCOIL ASSEM.
3.	2A-4429	[24]	LOCK
4.	8N-1187 RYC	[1]	HEAD GROUP
			(Separate Illustration)
5.	3B-0623	[6]	PLUG
6.	3S-8313	[7]	PLUG
7.	1S-3062	[18]	DIRECTOR
8.	7N-4448	[6]	INSERT (intake)
9.	1P-6837	[6]	INSERT (exhaust)
10.	3S-5496	[1]	SEAL
11.	7N-8018	[6]	SEAL
12.	5M-2667	[6]	GASKET 4.93mm (.194 in.) thick
	2S-8959	[6]	GASKET 5.66mm (.223 in.) thick
	2S-8960	[6]	GASKET 6.3 mm (.248 in.)thick
13.	7S-3206	[6]	SEAL
14.	8S-3970	[6]	CHAMBER ASSEM.
15.	7N-7999	[1]	GASKET
16.	5S-6452	[6]	VALVE (intake)
17.	5S-7232	[6]	VALVE (exhaust)
18.	7N-8025	[18]	SEAL
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE