5S9088 ALTERNATOR ASSEMBLY--24 Volt. 50 Ampere--Part 2 of 2 Standard with Serial No. 45P1512 to 45P1514 and 45P1516 to 45P084 inclusive & Attachment with Serial No. 45P2085-Up Part of 4N2286 & 6N8991 Alternator Groups shown on Pages 26K & 27 621B

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

0. 5S-9088 ALTERNATOR
1. 4N-2286 ALTERNATOR
2. 4M-2286 ALTERNATOR
3. 6N-8991 ALTERNATOR
4. 6N-9294 ALTERNATOR
5. 6N-9294 ALTERNATOR
6. 6N-9294 ALTERNATOR
7. 9G-8255 ALTERNATOR
8. 9G-8255 ALTERNATOR
9. 7N-9720 ALTERNATOR
0. INFORMATION

WHEEL TRACTOR 621B WHEEL TRACTOR 45P
621B TRACTOR 45P00001-02711 (MACHINE) UEG0807S 621B 45P (1973)

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

5S-9088 ALTERNATOR GP-CHARGING

4N-2286 ALTERNATOR GP-CHARGING

4M-2286 ALTERNATOR GROUP

6N-8991 ALTERNATOR GP-CHARGING

#UEG0807S0070

5S-9088: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

5S9088 ALTERNATOR ASSEMBLY--24 Volt. 50 Ampere--Part 2 of 2
Standard with Serial No. 45P1512 to 45P1514 and 45P1516 to 45P084 inclusive & Attachment with Serial No. 45P2085-Up
Part of 4N2286 & 6N8991 Alternator Groups shown on Pages 26K & 27

c162529 UEG0807S

5S9088 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5P-3419 C	[1]	RACE
2.	9S-2248	[1]	FIELD COIL AND SUPPORT ASSEM.
3.	9S-2004	[1]	STATOR ASSEM.
4.	9S-2006	[1]	INSULATOR
5.	9S-2005	[1]	GROMMET
6.	9S-2014	[3]	CLIP
7.	9S-2302	[1]	ROTOR ASSEM.
8.	9S-2390	[1]	RETAINER ASSEM.
9.	9S-2391	[1]	SEAL
10.	9S-2256	[1]	GASKET
11.	9S-2261	[1]	COLLAR
12.	2F-5721	[1]	BEARING
13.	2P-5616	[1]	FRAME
14.	3B-4502	[4]	LOCKWASHER
15.	9S-2009	[4]	BOLT
16.	9S-2391	[1]	SEAL
17.	9S-2254	[1]	COLLAR
18.	9S-2252	[1]	SLINGER
19.	9S-2008	[4]	SCREW
20.	9S-2258	[1]	FAN AND BAFFLE ASSEM.
21.	7F-7621	[1]	WASHER
22.	2K-4821	[1]	LOCKNUT
	C		INDICATES CHANGE

#UEG0807S0071

4N-2286: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

4N2286 ALTERNATOR GROUP
Serial No. 45P1512 to 45P1514 and 45P1516 to 45P2084 inclusive
5S9088 Alternator parts are shown on Pages 26H & 26J
See 3406 Vehicular Engine Book for Alternator parts prior to above Serial Numbers

c163273 UEG0807S

4N2286 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1589	[1]	BOLT
2.	1D-5118	[2]	NUT
3.	9S-3784	[1]	BLOCK
4.	0L-1143	[1]	BOLT
	1D-4717	[1]	NUT
	5M-2894	[2]	WASHER
	3K-0925	[1]	SPACER
5.	1S-4589	[1]	ROD
6.	6N-6967	[1]	GUARD ASSEM.
7.	4N-8225	[1]	PULLEY
8.	0S-1587	[1]	BOLT 4.45 cm(1.75 in.) long
	2M-0849	[1]	WASHER 3.81 cm(1.5 in.) long
	0S-1585	[1]	BOLT
9.	6N-0073	[1]	VEE BELT
10.	5S-9088 RY	[1]	ALTERNATOR GROUP
			(Separate Illustration)
11.	9M-9811	[1]	WIRE ASSEM.
			(Includes)
	5P-6021 H		WIRE .31 m(12 in.)
	9F-3965	[1]	TERMINAL
12.	2L-8052	[1]	TERMINAL
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE METRE

#UEG0807S0072

4M-2286: ALTERNATOR GROUP

ALTERNATOR GROUP

4M2286 ALTERNATOR GROUP
Serial No. 45P2085-Up
6N9294 Alternator parts are shown on Pages 27A & 27B
See 3406 Vehicular Engine Book for Alternator parts prior to above Serial Numbers

c171441 UEG0807S

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1589	[1]	BOLT
2.	1D-5118	[2]	NUT
3.	9S-3784	[1]	BLOCK
	0L-1143	[1]	BOLT
4.	1D-4717	[1]	NUT
	5M-2894	[2]	WASHER
	3K-0925	[1]	SPACER
5.	1S-4698 C	[1]	ROD
6.	6N-6967	[1]	GUARD ASSEM.
7.	4N-8225	[1]	PULLEY
	0S-1587	[1]	BOLT 4.45 cm(1.75 in.) long
8.	2M-0849	[1]	WASHER 3.81 cm(1.5 in.) long
	0S-1585	[1]	BOLT
9.	6N-0073	[1]	VEE BELT
10.	6N-9294 RYC	[1]	ALTERNATOR GROUP
			(Separate Illustration)
11.	4N-5092 C	[1]	WIRE ASSEM.
			(Includes)
	5P-5622 H		WIRE .31 m(12 in.)
	2L-8066	[1]	TERMINAL
12.	2L-8069	[1]	TERMINAL
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE METER
	C		INDICATES CHANGE

#UEG0807S0073

6N-8991: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

6N8991 ALTERNATOR GROUP--24 Volt, 50 Ampere
Serial No. 45P2085-Up
Part of 2G7625 and 6G4917 Air Conditioner Arrangements listed on
Pages 148F-1 & 148F-1b. AN ATTACHMENT

UEG0807S0073 UEG0807S

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Part No	Qty	Parts name
5S-9088 RY	[1]	ALTERNATOR GROUP
9M-9811	[1]	WIRE ASSEMBLY ALTERNATOR TO ENGINE
9F-3965	[1]	TERMINAL
9F-3068	[1]	TERMINAL
R		REMFG PART MAY BE AVAILABLE
Y		SEPARATE ILLUSTRATION

#UEG0807S0074

6N-9294: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

6N9294 ALTERNATOR GROUP--24 Volt, 35 Ampere
Serial No. 45P2592-Up
Part of 4N2286 Alternator Group shown on Page 26K

UEG0807S0074 UEG0807S

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Part No	Qty	Parts name
9G-8255 Y	[1]	ALTERNATOR GROUP (DELCO-REMY)
		(SEPARATE ILLUSTRATION)
		- OR -
7N-9720 Y	[1]	ALTERNATOR GROUP
		(SEPARATE ILLUSTRATION)
Y		SEPARATE ILLUSTRATION

#UEG0807S0075

6N-9294: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

6N9294 ALTERNATOR GROUP--24 Volt, 35 Ampere--Part 1 of 2
Serial No. 45P2085 to 45P2591 inclusive
Part of 4N2286 Alternator Group shown on Page 26K

c226124 UEG0807S

6N9294 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5P-6920	[1]	BEARING
2.	7N-7806	[1]	COIL ASSEM.
3.	7N-7804	[1]	STRATOR ASSEM.
4.	7N-7795	[1]	COLLAR
5.	7N-7810	[1]	FRAME ASSEM.
6.	5P-9514	[1]	BEARING
7.	9L-2140	[1]	PLATE
8.	9L-6782	[1]	SHIELD
9.	7N-7800	[1]	ROTOR ASSEM.
10.	2K-4821	[1]	LOCKNUT
11.	7F-7621	[1]	WASHER
12.	9L-6783	[1]	COLLAR
13.	9L-2139	[1]	WASHER
14.	9N-1210	[1]	FAN ASSEM.
15.	7N-9020	[3]	SCREW ASSEM.
16.	9L-2137	[1]	RETAINER ASSEM.
17.	7N-7122 C	[1]	RECTIFIER ASSEM.
18.	9S-2396	[1]	BUSHING
19.	9S-2007	[4]	SCREW
20.	7N-7809	[1]	PLATE
21.	7N-7805 C	[1]	HOUSING
22.	7N-9024	[4]	BOLT
	C		INDICATES CHANGE

#UEG0807S0076

6N-9294: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

6N9294 ALTERNATOR GROUP--24 Volt, 35 Ampere--Part 2 of 2
Serial No. 45P2085 to 45P2591 inclusive
Part of 4N2286 Alternator Group shown on Page 26K

c218759 UEG0807S

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-7807	[1]	TERMINAL KIT (output)
			(Includes Insulator, Screw, Washers, Lockwasher, Nut, & Adapter)
2.	7N-7808	[1]	TERMINAL KIT
			(Includes Stud, Bushings, Washers & Nut Assem.)
3.	9L-6770	[1]	CAP
4.	8N-0740	[5]	SCREW ASSEM.
5.	7N-9022	[2]	SCREW ASSEM.
	9N-0938	[2]	WASHER
6.	7N-9023	[2]	SCREW ASSEM.
7.	7N-7799	[1]	REGULATOR ASSEM.
8.	6N-1869	[4]	NUT ASSEM.
9.	7N-7811	[1]	CONNECTOR
10.	7N-9018	[3]	SCREW ASSEM.
11.	9N-1202	[1]	DIODE ASSEM.
12.	7N-7797	[2]	INSULATOR
13.	7N-9021	[1]	SCREW ASSEM.
	7N-7796	[1]	BUSHING
14.	7N-7802	[1]	CAPACITOR ASSEM.
	3N-4082	[1]	BRACKET
15.	7N-7798	[1]	CONNECTOR
16.	7N-7801	[1]	CONNECTOR

#UEG0807S0077

9G-8255: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

9G8255 ALTERNATOR GROUP--24 Volt, 35 Ampere--Part 1 of 2
Serial No. 45P2592-Up
Part of 6N9294 Atlernator Group shown on Page 27

c228795 UEG0807S

9G8255 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5P-6920	[1]	BEARING-ROLLER
2.	7N-7806	[1]	COIL AS-FIELD
3.	7N-7804	[1]	STATOR AS
4.	7N-7795	[1]	COLLAR
5.	7N-7810	[1]	FRAME AS-DRIVE END
6.	5P-9514	[1]	BALL BEARING
7.	9L-2140	[1]	PLATE
8.	9L-6782	[1]	SHIELD-DUST
9.	7N-7800	[1]	ROTOR AS
10.	2K-4821	[1]	LOCKNUT
11.	7F-7621	[1]	WASHER
12.	9L-6783	[1]	COLLAR
13.	9L-2139	[1]	WASHER-FELT
14.	9N-1210	[1]	FAN AS
15.	7N-9020	[3]	SCREW AS
16.	9L-2137	[1]	RETAINER AS
17.	7N-7122	[1]	RECTIFIER AS
18.	9S-2396	[1]	BUSHING
19.	9S-2007	[4]	SCREW-LOCKING
20.	7N-7809	[1]	PLATE
21.	7N-7805	[1]	HOUSING
22.	7N-9024	[4]	BOLT

#UEG0807S0078

9G-8255: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

9G8255 ALTERNATOR GROUP--24 Volt, 35 Ampere--Part 2 of 2
Serial No. 45P2592-Up
Part of 6N9294 Alternator Group shown on Page 27

c228796 UEG0807S

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-7807	[1]	TERMINAL KIT (output)
			(Includes Insulator, Screw, Washers, Lockwasher, Nut and Adapter)
2.	7N-7808	[1]	TERMINAL KIT
			(Includes Stud, Bushings, Washers and Nut Assem.)
3.	9L-6770	[1]	CAP
4.	8N-0740	[5]	SCREW ASSEM.
5.	7N-9022	[2]	SCREW ASSEM.
	9N-0938	[2]	WASHER
6.	7N-9023	[2]	SCREW ASSEM.
7.	7N-7799	[1]	REGULATOR ASSEM.
8.	6N-1869	[4]	NUT ASSEM.
9.	7N-7811	[1]	CONNECTOR
10.	7N-9018	[3]	SCREW ASSEM.
11.	9N-1202	[1]	DIODE ASSEM.
12.	7N-7797	[2]	INSULATOR
13.	7N-9021	[1]	SCREW ASSEM.
	7N-7796	[1]	BUSHING
14.	7N-7802	[1]	CAPACITOR ASSEM.
	3N-4082	[1]	BRACKET
15.	7N-7798	[1]	CONNECTOR
16.	7N-7801	[1]	CONNECTOR

#UEG0807S0079

7N-9720: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

7N9720 ALTERNATOR GROUP--24 Volt, 35 Ampere--Part 1 of 2
Serial No. 45P2592-Up
Part of 6N9294 Alternator Group listed on Page 27

c235257 UEG0807S

7N9720 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9G-7551	[1]	BEARING
2.	9G-7548	[1]	RING
3.	9G-7558	[1]	COIL ASSEM.
4.	9G-7560	[1]	ROTOR ASSEM.
5.	9G-7553	[1]	RING
6.	9G-7562	[1]	COVER ASSEM.
7.	9G-7567	[1]	REGULATOR ASSEM.
8.	9G-7552	[1]	BEARING
9.	9G-7557	[1]	SCREW ASSEM.
10.	9G-7568	[1]	FRAME ASSEM.
11.	9G-7563	[1]	DIODE ASSEM.
12.	9G-7561	[1]	STATOR ASSEM.
13.	9G-7566	[1]	FRAME
14.	9G-7564	[1]	FAN
15.	9G-7549	[1]	SPACER
16.	2K-4821	[1]	LOCKNUT
		[1]	WASHER
17.	3T-5962 C	[1]	NAME PLATE
18.	2H-3880 C	[2]	SCREW (drive)
19.	3B-4510 C	[1]	LOCKWASHER
20.	1B-8705 C	[1]	KEY
			THE FOLLOWING REPAIR KITS ARE AVAILABLE:
	9G-7554	[1]	KIT (ground terminal)
			(Includes nuts and lockwashers)
	9G-7555	[1]	KIT (output terminal)
			(Includes nuts, washers and bushings)
	9G-7556	[1]	KIT (capacitor)
			(Includes capacitor, screw, lockwasher and washer)
	9G-7559	[1]	KIT (relay terminal)
			(Includes splice, tube, nut, terminal, luckwasher, washers, and bushing)
	9G-7565	[1]	KIT (regulator terminal)
			(Includes nuts, lockwashers, washers and bushing)
	C		INDICATES CHANGE