2N6398 ALTERNATOR ASSEMBLY--24 Volt, 35 Ampere Also part of 6N7138 and 3N5680 Alternator Groups shown on Pages 111A-1 and 111A-2. NOTE: Provides Field Replacement for 2N6397 shown on Page 118 3406

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

0. 2N-6398 ALTERNATOR

BATTERY GP

1. 7L-7872 BATTERY GP
2. 7L-7871 BATTERY GP
3. 2N-1943 BATTERY GP
4. 1H-1342 BATTERY GP

BOX GP

5. 3N-5567 BOX GP-GEN
6. 3N-6710 BOX GP-EXT

STARTING MOTOR GP

7. 6L-4040 CHART-HYDR
8. 3N-7120 EQUIPMENT

MARINE TRANSMISSION

KIT-MARINE SPARE PARTS

9. 3N-9430 MARINE SOC
0. INFORMATION

MARINE ENGINE 3406 MARINE ENGINE 91U
3406 MARINE ENGINE 91U00123-UP SEBP1019 3406 91U (1975)

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

4N-3987 ALTERNATOR GP

2N-6397 ALTERNATOR AS

2N-6398 ALTERNATOR AS

#SEBP10190470

2N-6398: ALTERNATOR AS

ALTERNATOR AS

2N6398 ALTERNATOR ASSEMBLY--24 Volt, 35 Ampere
Also part of 6N7138 and 3N5680 Alternator Groups shown on Pages 111A-1 and
111A-2. NOTE: Provides Field Replacement for 2N6397 shown on Page 118

c230251 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8L-9659	[1]	STATOR AS
2.	9G-5208 C	[1]	RETAINER-REAR BEARING
3.	8L-9348	[1]	INSULATOR-SHUNT
4.	8L-9362	[1]	GASKET-COVER
5.	2N-6399	[1]	BRUSH AS
6.	8L-9361	[1]	COVER-RADIUS HOUSING
7.	8L-9381	[2]	SCREW-TAPPING
8.	8L-9380	[4]	NUT & LOCK AS
9.	8L-9352	[10]	WASHER
10.	3N-1204	[4]	INSULATOR-SLEEVE
11.	8L-9368	[1]	HOUSING-REAR
12.	2N-7367	[4]	BOLT
13.	3N-1202	[1]	ROTOR AS
14.	3K-6168	[1]	BOLT
	7H-2079	[1]	LOCKWASHER
	3N-1223	[1]	WASHER
15.	3N-1200	[1]	RING AS-SLIP
16.	5P-6836 C	[1]	BEARING
17.	8L-9655	[1]	HOUSING-FRONT
18.	8L-9657	[1]	RETAINER-FRONT BEARING
19.	8L-9661	[1]	FAN
20.	1S-7056	[1]	BALL BEARING
21.	8L-9357	[1]	NUT-HEX
	5D-3184	[1]	LOCKWASHER
22.	1B-8704	[1]	KEY-WOODRUFF
23.	1N-9087	[1]	SPACER-FAN
24.	8L-9663	[1]	SEAL-GREASE
25.	8L-9375	[2]	BOLT-CARRIAGE
	8L-9377	[2]	WASHER
26.	7H-2079	[7]	LOCKWASHER
27.	4B-2047	[7]	NUT
28.	8L-9347	[3]	INSULATOR
29.	8L-9358	[1]	CABLE AS
30.	8L-9365	[1]	DIODE AS (3 DIODES-NEG)
31.	8L-9363	[1]	DIODE AS (3 DIODES-POS)
32.	8L-9359	[1]	BOLT-CARRIAGE
33.	8L-9376	[2]	SCREW-TAPPING
34.	8L-9709	[1]	CABLE AS
35.	5L-7200	[3]	SCREW
	3B-4501	[3]	LOCKWASHER
36.	8L-9654	[1]	SLEEVE-SHAFT
37.	8L-9656	[1]	WASHER-BEARING SEAL
	C		CHANGE FROM PREVIOUS TYPE

#SEBP10190471

7L-7872: BATTERY GP

BATTERY GP

7L7872 BATTERY GROUP--24 Volt, 220 Ampere Hours
FOR USE BETWEEN--20 DEGREES AND 0 DEGREES FAHRENHEIT
Only separate parts serviced. AN ATTACHMENT

c229624 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5M-9204	[1]	TERMINAL ASSEM. (+)
2.	5M-9205	[1]	TERMINAL ASSEM. (-)
			(Each Includes)
3.	1M-6119	[1]	BOLT
	1M-6120	[1]	NUT
4.	2V-7397 C	[1]	CABLE ASSEM.
			(Includes)
	5P-0747 H		CABLE 18.4 cm(7.25 in.)
5.	5M-9205	[1]	TERMINAL ASSEM. (-)
6.	5M-9204	[1]	TERMINAL ASSEM. (+)
			(Each Includes)
7.	1M-6119	[1]	BOLT
	1M-6120	[1]	NUT
8.	9G-0004 C	[1]	TERMINAL COVER (+)
9.	9G-0003 C	[1]	TERMINAL COVER (-)
10.	4S-9219	[2]	BATTERY
			(Each Includes)
	7G-9383	[6]	VENT ASSEM.
11.	8L-8413 C	[2]	STRAP
	C		INDICATES CHANGE
	H		ORDER BY THE CENTIMETER

#SEBP10190472

7L-7871: BATTERY GP

BATTERY GP

7L7871 BATTERY GROUP--24 Volt, 172 Ampere Hours
FOR USE BETWEEN 0 DEGREES AND 30 DEGREES FAHRENHEIT
TEMPERATURES. Only separate parts serviced. AN ATTACHMENT

c228238 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2V-7397 C	[1]	CABLE ASSEM.
	5P-0747 H		CABLE 18.4 cm(7.25 in.)
2.	5M-9205	[1]	TERMINAL ASSEM. (-)
3.	5M-9204	[1]	TERMINAL ASSEM. (+)
4.	1M-6119	[2]	BOLT
	1M-6120	[2]	NUT
5.	9G-0004 C	[1]	TERMINAL COVER (+)
6.	9G-0003 C	[1]	TERMINAL COVER (-)
7.	4S-9261	[2]	BATTERY
	7G-9383 C	[6]	VENT ASSEM.
8.	5M-9204	[1]	TERMINAL ASSEM. (+)
9.	5M-9205	[1]	TERMINAL ASSEM. (-)
10.	1M-6119	[1]	BOLT
	1M-6120	[1]	NUT
11.	8L-8413 C	[2]	STRAP
	C		INDICATES CHANGE
	H		ORDER BY THE CENTIMETER

#SEBP10190473

2N-1943: BATTERY GP

BATTERY GP

2N1943 BATTERY GROUP--30 Volt, 172 Ampere Hours
FOR USE BETWEEN 0 DEGREES AND 30 DEGREES FAHRENHEIT
TEMPERATURES. AN ATTACHMENT

c228236 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1L-5686	[4]	CABLE ASSEM.
			(Each Includes)
2.	5M-9205	[1]	TERMINAL ASSEM. (-)
3.	5M-9204	[1]	TERMINAL ASSEM. (+)
			(Each Includes)
4.	1M-6119	[1]	BOLT
	1M-6120	[1]	NUT
5.	5M-9204	[1]	TERMINAL ASSEM. (+)
6.	5M-9205	[1]	TERMINAL ASSEM. (-)
			(Each Includes)
7.	1M-6119	[1]	BOLT
	1M-6120	[1]	NUT
8.	9G-3837 C	[5]	BATTERY ASSEM.
			(Each Includes)
9.	7S-5041	[3]	PLUG
	C		INDICATES CHANGE

#SEBP10190474

1H-1342: BATTERY GP

BATTERY GP

1H1342 BATTERY GROUP--30 Volt, 200 Ampere Hours
FOR USE BETWEEN -20 DEGREES AND 0 DEGREES FAHRENHEIT
TEMPERATURES. AN ATTACHMENT

c144698 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-0131	[4]	CABLE AS
	4S-8783 G		CABLE-STARTER (16 IN.)
2.	3S-6049	[1]	TERMINAL AS (+)
3.	2D-8788	[2]	BOLT
	2D-8787	[2]	NUT-BATTERY (TERM)
			(1 EA. IN 3S6049
			& 3S6050 ASSEM.)
4.	3S-6050	[1]	TERMINAL AS (-)
5.	9S-7130	[5]	BATTERY-6V
6.	7S-5041	[3]	PLUG
7.	5M-9205	[1]	TERMINAL AS (-)
8.	1M-6119	[2]	BOLT
	1M-6120	[2]	NUT
			(1 EA. IN 5M9205 &
			5M9204 ASSEM.)
9.	5M-9204	[1]	TERMINAL AS (+)
	G		ORDER BY THE INCH

#SEBP10190475

3N-5567: BOX GP-GENERATOR CONNECTION

BOX GP-GENERATOR CONNECTION

3N5567 GENERATOR CONNECTION BOX GROUP
FOR USE WITH SR4 GENERATORS. AN ATTACHMENT

c155569 SEBP1019

3N5567 BOX GP-GENERATOR CONNECTION Parts scheme

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-0509	[4]	BOLT
	3N-6734	[4]	NUT-SPRING
	9F-5644	[4]	LOCKWASHER
2.	3N-6710 Y	[1]	BOX GP-EXTENSION TERMINAL
3.	3N-7309	[1]	CONNECTION AS
	Y		SEPARATE ILLUSTRATION

#SEBP10190476

3N-6710: BOX GP-EXTENSION TERMINAL

BOX GP-EXTENSION TERMINAL

3N6710 EXTENSION TERMINAL BOX GROUP
FOR USE WITH STAND-BY ELECTRIC SET
Part of 3N5567 Generator Connection Box Group shown on Page 122
AN ATTACHMENT

c117969 SEBP1019

3N6710 BOX GP-EXTENSION TERMINAL Parts scheme

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Pos.	Qty	Parts name
1.	[14]	BOLT
	[14]	LOCKWASHER
2.	[1]	COVER
3.	[1]	BOX ASSEM. (Extension)

#SEBP10190477

6L-4040: CHART-HYDRAULIC STARTING

CHART-HYDRAULIC STARTING

6L4040 HYDRAULIC STARTING SYSTEM ARRANGEMENT
AN ATTACHMENT

SEBP10190477 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
3N-7120 Y	[1]	EQUIPMENT GROUP
2L-3333	[1]	HYDRAULIC GAUGE
2L-8342	[1]	HYDRAULIC HAND PUMP
2L-8343	[2]	ACCUMULATOR
6L-2852	[2]	RESERVOIR MOUNTING STRAP
6L-2853	[1]	RESERVOIR ASSEMBLY
6L-4694	[1]	STARTER CONTROL VALVE
6L-8719	[1]	RECHARGING PUMP ASSEMBLY
7L-8656	[1]	HYDRAULIC CRANKING MOTOR
2N-3341	[1]	FILTER HIGH PRESSURE
3N-6903	[1]	PULLEY
3N-6923	[1]	PUMP MOUNTING BRACKET
3L-4238	[4]	ACCUMULATOR BRACKET ASSEMBLY
4B-4277	[2]	WASHER
5B-5620	[2]	BOLT
2L-5683	[2]	CLAMP ACCUMULATOR
2L-5684	[1]	SUPPORT ACCUMULATOR CLAMP
4M-5280	[2]	NUT
3N-9503	[2]	ACCUMULATOR ASSEMBLY PISTON TYPE
1S-8411	[1]	TAG
3N-9502	[1]	PLATE WARNING
Y		SEPARATE ILLUSTRATION

#SEBP10190478

3N-7120: EQUIPMENT GROUP

EQUIPMENT GROUP

3N7120 EQUIPMENT GROUP
Part of Hydraulic Starting System

SEBP10190478 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
2B-2695	[4]	BOLT PUMP TO BRACKET
3B-4505	[4]	LOCKWASHER
3B-7284	[2]	NIPPLE
5B-8978	[2]	TEE
7B-9684	[1]	VALVE
8B-2664	[4]	BUSHING
2D-0058	[1]	UNION
2D-8910	[2]	UNION
3D-8884	[1]	ELBOW
4D-4917	[1]	TEE
7D-0702	[2]	UNION
2H-3940	[1]	UNION
2H-9091	[3]	UNION
4H-2243	[18]	COUPLING
4L-7412	[2]	ADAPTER
5L-5502	[2]	TEE
	[2]	HOSE
3N-6405	[1]	HOSE
3N-6922	[2]	COUPLING
007-0950	[1]	ADAPTER
8S-2332	[3]	BOLT MOTOR TO FLYWHEEL HOUSING

#SEBP10190479

3N-9430: MARINE SOCIETY SPARE PARTS KIT

MARINE SOCIETY SPARE PARTS KIT

3N9430 MARINE SOCIETY SPARE PARTS KIT--Propulsion--Part 1 of 2
Serial No. 91U123 to 91U728 inclusive. FOR PRECOMBUSTION CHAMBERED ENGINES
AN ATTACHMENT

SEBP10190479 SEBP1019

For full view, you need register

Parts for your 3406 MARINE ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
5F-4899	[1]	BOLT HEAD ASSEMBLY TO CYLINDER BLOCK
2H-3750	[3]	BOLT HEAD ASSEMBLY TO CYLINDER BLOCK
5H-1504	[5]	WASHER
4N-5079	[1]	HEAD ASSEMBLY
		(SERIAL NO. 91U123 TO 91U448 INCLUSIVE)
		- OR -
6N-9938	[1]	HEAD ASSEMBLY
		(SERIAL NO. 91U449 TO 91U484 INCLUSIVE)
		- OR -
7N-1303 R	[1]	HEAD ASSEMBLY
		(SERIAL NO. 91U485-UP)
4N-5893	[4]	INSERT INTAKE
2P-9845	[1]	BOLT HEAD ASSEMBLY TO CYLINDER BLOCK
5P-2297	[1]	GASKET KIT VALVE GRINDING
9S-9699	[6]	INSERT EXHAUST
2A-4429	[20]	LOCK
2N-5571	[10]	ROTOCOIL ASSEMBLY
4N-2803	[10]	GUIDE
4N-5653	[6]	VALVE EXHAUST
4N-5654	[4]	VALVE INTAKE
4N-5906	[10]	SPRING
9H-1031	[2]	WASHER BEARING CAP MAIN
8L-3443	[1]	PIN CONNECTING ROD TO PISTON
8L-3440	[1]	BEARING CONNECTING ROD
2N-6210	[3]	SEAL LINER
4N-0849	[2]	PLATE THRUST
4N-1151	[1]	GASKET OIL PAN
4N-1627	[1]	LINER CYLINDER
4N-5619	[1]	RING GROUP PISTON PARTS SERVICE
6N-3909	[1]	BEARING MAIN CRANSHAFT
6N-3911 R	[1]	ROD ASSEMBLY PISTON TO CRANKSHAFT
6N-4127	[1]	PISTON GROUP TO CONNECTING ROD
6N-7436	[1]	BEARING CONNECTING ROD
3P-1323	[2]	BOLT BEARING CAP MAIN
008-3214	[2]	RETAINER
R		REMFG PART MAY BE AVAILABLE