2Y2961 ALTERNATOR GROUP--Field Conversion--Type 2 120B MOTOR GRADER

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

0. 2Y-2961 ALTERNATOR

WIRING GP

1. 2Y-2074 HARNESS AS

ALTERNATOR GP-CHARGING

2. 2Y-2094 ALTERNATOR
3. 2Y-2941 ALTERNATOR
4. 2Y-4212 ALTERNATOR

STARTING MOTOR GP

5. 2Y-1920 STARTING M

LIGHTING GP

6. 2Y-1780 LAMP GP-HE
7. 2Y-1790 LAMP GP-HE
8. 2Y-1790 LAMP GP-HE
9. 2Y-1790 LAMP GP-HE
0. INFORMATION

MOTOR GRADER 120B MOTOR GRADER 64U
120B MOTOR GRADER 64U02061-UP (MACHINE) POWERED BY 3306 ENGINE ZEBP0544 120B 64U (1972)

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

2Y-2095 ALTERNATOR GROUP

2V-2935 ALTERNATOR GROUP

2Y-2935 ALTERNATOR GP-CHARGING

2Y-2961 ALTERNATOR GP-CHARGING

2Y-2094 ALTERNATOR GROUP

2Y-2941 ALTERNATOR GROUP

2Y-4212 ALTERNATOR GP-CHARGING

#ZEBP05440170

2Y-2961: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

2Y2961 ALTERNATOR GROUP--Field Conversion--Type 2

ZEBP05440170 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Part No	Qty	Parts name
2Y-2930 Y	[1]	REGULATOR ASSEMBLY
2Y-4212 Y	[1]	ALTERNATOR GROUP
2Y-3449	[1]	BRACKET
1A-5964	[1]	BOLT
3B-4506	[3]	LOCKWASHER
1D-4719	[1]	NUT
3B-4508	[2]	LOCKWASHER
1A-5822	[1]	BOLT
0S-1571	[2]	BOLT
2Y-4847	[1]	STRAP
0S-1585	[1]	BOLT
8M-4791	[1]	WASHER
1A-9579	[1]	BOLT
4B-5270	[2]	WASHER
1D-4716	[1]	NUT
3B-4505	[1]	LOCKWASHER
2Y-2950	[1]	HARNESS ASSEMBLY
3S-2093	[6]	STRAP
2Y-3374	[3]	NIPPLE
2Y-4206	[1]	PULLEY
Y		SEPARATE ILLUSTRATION

#ZEBP05440171

2Y-2074: HARNESS AS

HARNESS AS

2Y2074 HARNESS ASSEMBLY
Serial No. 64U2467-Up
Part of 2Y1955 Battery and Wiring Group shown on Pages 80, 85, 90, 90E & 90K

sp1379 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4L-3916	[3]	TERMINAL
2.	5P-5629	[5]	WIRE
3.	6B-2864	[1]	TERMINAL
4.	2L-8077	[1]	TERMINAL
5.	2L-8071	[1]	TERMINAL
6.	5P-5632	[1]	WIRE
7.	3M-6018	[1]	TERMINAL
8.	2Y-1645	[1]	WASHER
9.	3M-6547	[1]	SHELL

#ZEBP05440172

2Y-2094: ALTERNATOR GROUP

ALTERNATOR GROUP

2Y2094 ALTERNATOR GROUP
Part of 2Y2095 Alternator Group shown on Page 95
Serial No. 64U2061 to 64U2466

sp218 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2Y-1681	[1]	COVER ASSEM.
2.	2Y-1683	[1]	BRUSHIES SUPPORT ASSEM.
	2Y-2551	[1]	BRUSH & SPRING
3.	2Y-1686	[1]	DISSIPATOR ASSEM. (Pos.)
4.	2Y-1688	[1]	DISSIPATOR ASSEM. (Neg.)
5.	3B-4128	[1]	BEARING
6.	2Y-1690	[1]	ROTOR ASSEM.
7.	2Y-1691	[1]	STATOR ASSEM.
8.	2Y-1692	[1]	COVER ASSEM.
9.	2Y-1694	[2]	SEAL
10.	2Y-1695	[1]	SEAL-GUIDE
11.	2Y-1696	[1]	GASKET
12.	2Y-1687	[1]	BEARING
13.		[1]	PULLEY
14.	2Y-1698	[1]	NUT
15.	2Y-1699	[1]	FAN ASSEM.
16.	2Y-1700	[4]	SCREW
17.	2Y-2018	[1]	DIODE
	2Y-1701		KIT (Washers, LOCKWASHER, KEY INSULATOR, GASKET, PLATE NUT, SCREWS, RING AND RIVET).

#ZEBP05440173

2Y-2941: ALTERNATOR GROUP

ALTERNATOR GROUP

2Y2941 ALTERNATOR GROUP
Part of 2Y2935 and 2Y2961 Alternator Groups shown on Pages 96, 96B & 97
Serial No. 64U2467 to 64U4759

sp1245 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2Y-3316	[1]	COVER ASSEM.
	2Y-3338	[1]	COVER
2.	2Y-3330	[1]	BRUSHES SUPPORT ASSEM.
3.	2Y-3336	[1]	RECTIFIER ASSEM.
4.	2Y-3331	[3]	DIODE (Neg.)
5.	2Y-3335	[1]	BREATHER
6.	2Y-3317	[1]	STATOR
7.	2Y-3318	[1]	DISC
8.	2Y-3319	[1]	FAN
9.	2Y-3321	[1]	BEARING
10.	2Y-3322	[1]	ROTOR
11.	2Y-3323	[1]	COVER ASSEM.
12.	2Y-3324	[1]	BEARING
13.	2Y-3315	[1]	PULLEY
14.	2Y-3325	[4]	SCREW
15.	3B-4502	[4]	LOCKWASHER
16.	2Y-3326	[4]	WASHER
17.	2Y-3329	[1]	KEY
18.	2Y-3344	[1]	LOCKWASHER
19.	2Y-3362	[1]	NUT
			THE FOLLOWING SERVICE REPAIR KITS ARE AVAILABLE:
	2Y-3327	[1]	ROTOR KIT
	2Y-3328	[1]	BRUSH AND SPRING KIT
	2Y-3333	[1]	SCREW KIT (B+)
	2Y-3334	[1]	SCREW KIT (D-)
	2Y-3436	[1]	SCREW KIT (D+)
	2Y-3437	[1]	SCREW KIT (DF)
	2Y-3438	[1]	SCREW KIT RECTIFIER MTG

#ZEBP05440174

2Y-4212: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

2Y4212 ALTERNATOR GROUP
Serial No. 64U4760-Up
Part of 2Y2935 & 2Y2961 Alternator Groups shown on Pages 96, 96A, 96B & 97

sp1197 ZEBP0544

2Y4212 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2Y-3316	[ 1]	COVER ASSEM.
2.	2Y-3317	[ 1]	STATOR
3.	2Y-3318	[ 1]	DISC
4.	2Y-3319	[ 1]	FAN
5.	2Y-3321	[ 1]	BEARING
6.	2Y-3322	[ 1]	ROTOR
7.	2Y-3323	[ 1]	COVER ASSEM.
8.	2Y-3324	[ 1]	BEARING
9.	2Y-3392	[ 1]	CAPACITOR ASSEM.
10.	2Y-3325	[ 4]	SCREW
11.	3B-4502	[ 4]	LOCKWASHER
12.	2Y-3326	[ 4]	WASHER
13.	2Y-3344	[ 1]	LOCKWASHER
			THE FOLLOWING SERVICE REPAIR KITS ARE AVAILABLE:
	2Y-3327	[ 1]	ROTOR KIT
	2Y-3328	[ 1]	BRUSH AND SPRING KIT
	2Y-3436	[ 1]	SCREW KIT (D+)
	2Y-3333	[ 1]	SCREW KIT (B+)
	2Y-3334	[ 1]	SCREW KIT (D-)
	2Y-3437	[ 1]	SCREW KIT (DF)
	2Y-3438	[ 1]	SCREW KIT RECTIFIER MTG

#ZEBP05440175

2Y-1920: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

2Y1920 STARTING MOTOR GROUP
Part of 2Y1921 Starting Motor Group shown on Page 95

sp1376 ZEBP0544

2Y1920 STARTING MOTOR GP-ELECTRIC Parts scheme

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2Y-2373	[1]	PINION
2.	2Y-2374	[1]	BAFFLE
3.	2Y-2375	[1]	SUPPORT ASSEM.
4.	2Y-2376	[1]	SEAL
5.	2Y-2377	[1]	BEARING
6.	2Y-2378	[1]	SLEEVE
7.	2Y-2379	[1]	BEARING
8.	2Y-2380	[1]	CLUTCH ASSEM.
9.	2Y-2384	[1]	ARMATURE ASSEM.
10.	2Y-2385	[1]	BEARING
11.	2Y-2386	[1]	COIL ASSEM.
12.	2Y-2387	[1]	ROD ASSEM.
13.	2Y-2390	[8]	BOLT
14.	2Y-2391	[1]	STUD
15.	2Y-2392	[1]	SUPPORT ASSEM.
16.	2Y-2393	[1]	TERMINAL (Pos.)
17.	2Y-2394	[1]	TERMINAL (Neg.)
18.	2Y-2396	[1]	COVER
19.	2Y-2397	[1]	SWITCH ASSEM.
20.	2Y-2398	[1]	SWITCH ASSEM.
21.	2Y-2399	[3]	STUD
22.	2Y-2382	[2]	BOLT
23.	2Y-2383	[1]	SEAL
24.	2Y-2858	[1]	BUSHING

#ZEBP05440176

2Y-1780: LAMP GP-HEAD

LAMP GP-HEAD

2Y1780 HEAD LAMP GROUP - 24 Volt - With Cab
1M6052 Head Lamp parts are shown on Page 93

sp1377 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-3736	[1]	BRACKET
2.	1A-2029	[2]	BOLT
3.	3B-4506	[6]	LOCKWASHER
4.	1D-4717	[2]	NUT
5.	4B-1319	[2]	SCREW
6.	3B-4504	[2]	LOCKWASHER
7.	2H-1855	[1]	SWITCH
8.	1M-6052 Y	[2]	LAMP ASSEM.
			(Separate Illustration)
9.	2Y-4820	[2]	BRACKET
10.	1V-1494	[2]	SPACER
11.	4D-0012	[2]	GROMMET
12.	2Y-1779	[1]	HARNESS
13.	2Y-1778	[1]	CONDUIT
14.	8M-2772	[4]	CLIP
15.	2H-3755	[4]	BOLT
16.	3B-4505	[4]	LOCKWASHER
17.	1D-4716	[4]	NUT
18.	2Y-1788	[1]	HARNESS
19.	6B-2366	[1]	CONNECTOR
20.	2B-8352	[4]	WASHER
21.	5D-3184	[2]	LOCKWASHER
22.	5D-3183	[2]	NUT
23.	0S-1594	[4]	BOLT
24.	9S-1350	[2]	CLIP
	Y		SEPARATE ILLUSTRATION

#ZEBP05440177

2Y-1790: LAMP GP-HEAD

LAMP GP-HEAD

2Y1790 HEAD LAMP FRONT--24 Volt--Without Cab
Serial No. 64U2061 to 64U5796 inclusive
AN ATTACHMENT

sp1246 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.		[4]	BOLT
2.		[4]	LOCKWASHER
3.		[4]	NUT
4.		[1]	BRACKET ASSEM. (L.H.)
5.		[1]	BRACKET ASSEM. (R.H.)
6.		[1]	TUBE ASSEM. (L.H.)
7.		[1]	CONDUIT
8.		[1]	HARNESS ASSEM.
		[2]	TERMINAL (pink wire)
		[2]	TERMINAL (brow wire)
9.		[1]	TUBE ASSEM. (R.H.)
10.	C	[2]	SPACER
11.		[2]	LOCKNUT
	C		INDICATES CHANGE

#ZEBP05440178

2Y-1790: LAMP GP-HEAD

LAMP GP-HEAD

2Y1790 HEAD LAMP FRONT--24 Volt--Without Cab--Type 1
Serial No. 64U5797-Up. AN ATTACHMENT

sp1411 ZEBP0544

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Parts for your 120B MOTOR GRADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3F-2065	[2]	LOCKNUT
2.	2Y-1782	[1]	CONDUIT
3.	2Y-4820	[2]	BRACKET
4.	1V-1494	[2]	SPACER
5.	0L-0478	[4]	BOLT
6.	3B-4506	[4]	LOCKWASHER
7.	1B-4203	[4]	NUT
8.	2Y-1781	[1]	TUBE ASSEM. (LH)
9.	2Y-1776	[1]	HARNESS ASSEM.
10.	4D-3725	[1]	TUBE ASSEM.