ALTERNATOR (9S2563 N/S)--24 Volt, 19 Ampere Effective with Serial No. 50S124-Up and 55U1-Up 2P1204 Alternator parts are shown on Page 53 518

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

0. 9S-2563 ALTERNATOR
1. 9S-4070 ALTERNATOR
2. 2P-9575 ALTERNATOR
3. 2P-1204 ALTERNATOR

STARTING MOTOR GP

4. 7S-4090 STARTING M
5. 9S-7976 SOLENOID A
6. 7S-4090 STARTING M
7. 7S-4090 STARTING M

SWITCH GP

8. 6N-5123 SWITCH AS-

STARTING MOTOR GP

9. 3P-0006 STARTING M
0. INFORMATION

WHEEL SKIDDER 518 WHEEL SKIDDER 50S
518 SKIDDER 50S00001-00596 (MACHINE) UEG0597S 518 50S (1971)

ELECTRICAL AND STARTING SYSTEM

ALTERNATOR GP-CHARGING

9S-2563 ALTERNATOR

9S-4070 ALTERNATOR ASSEMBLY

2P-9575 ALTERNATOR HEAD GROUP

2P-1204 ALTERNATOR GP

#UEG0597S0070

9S-2563: ALTERNATOR

ALTERNATOR

ALTERNATOR (9S2563 N/S)--24 Volt, 19 Ampere
Effective with Serial No. 50S124-Up and 55U1-Up
2P1204 Alternator parts are shown on Page 53

c113284 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2P-1204 YC	[1]	ALTERNATOR ASSEM.
			(See Separate Illustration)
2.	0S-1595	[1]	BOLT (1.25" long)
3.	3B-4508	[2]	LOCKWASHER
4.	0S-1585	[1]	BOLT (1.5" long)
5.	8M-4791	[3]	WASHER
6.	8S-4183	[1]	STRAP
7.	5S-7609	[1]	PULLEY
8.	9S-1240	[1]	NUT ASSEM.
9.	0S-1571	[1]	BOLT (1.75" long)
10.	3B-4506	[2]	LOCKWASHER
11.	7S-6723	[1]	BRACKET
12.	0S-1619	[1]	BOLT (3" long)
13.	1D-4574	[1]	BOLT (6" long)
14.	4D-0674 C	[1]	WIRE ASSEM.
	6B-2759	[1]	TERMINAL (.38" Screw)
	7B-4826	[2]	INSULATOR
	1F-7240	[1]	TERMINAL (No. 10 Screw)
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#UEG0597S0071

9S-4070: ALTERNATOR ASSEMBLY

ALTERNATOR ASSEMBLY

9S4070 ALTERNATOR ASSEMBLY--24 Volt, 19 Ampere
Serial No. 50S1 to 50S123 inclusive
Part of Alternator shown on Page 51

c137941 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1P-1135	[3]	SCREW
2.	9S-2329 H	[1]	REGULATOR ASSEM.
	3K-6234	[1]	SCREW
	4B-4863	[1]	WASHER
3.	7S-7182	[1]	BOOT
4.	2L-8076	[2]	TERMINAL
5.	2L-8077	[1]	TERMINAL
6.	1P-1091 J	[1]	KIT (Reg. Mounting Plate & Gasket)
7.	1P-1145	[1]	HOLDER ASSEM.
	1P-1137	[1]	HOLDER
8.	4B-2049	[3]	NUT
	3B-4502	[3]	LOCKWASHER
9.	1P-1138	[1]	FIELD TERMINAL & PLATE ASSEM.
10.	5S-4245	[2]	SCREW
	6B-4542	[2]	LOCKWASHER
11.	1P-1088 J	[1]	KIT (2 Brush Springs)
12.	1P-1130 J	[1]	KIT (2 Brushes)
13.	5H-8548	[4]	SCREW ASSEM.
14.	1P-1090 J	[1]	KIT (3 Gaskets)
15.	1P-1080 J	[1]	KIT (Retainer and Seals)
16.	2P-5111 J	[1]	KIT
			(Terminal Stud and Hardware)
17.	1P-1078	[1]	RECTIFIER & STATOR ASSEM.
18.	1P-1076	[1]	PLATE & RECTIFIER ASSEM.
			(Positive)
	1P-1077	[1]	PLATE & RECTIFIER ASSEM.
			(Negative)
	2P-6262	[1]	INSULATOR
19.	1P-1185	[1]	ROTOR ASSEM.
20.	1B-8705	[1]	KEY
21.	3B-4502	[8]	LOCKWASHER
22.	1P-1223	[1]	HEAD ASSEM.
	6D-9953	[1]	PIN
23.	5M-6755	[3]	SCREW
24.	1B-5387	[1]	BEARING
25.	1P-1084 J	[1]	KIT (Retainer and Seal)
			(Seal and 3 Retainers)
26.	1P-1082	[1]	SPACER
27.	5H-6467	[1]	SCREW
28.	3B-4511	[1]	LOCKWASHER
29.	1P-1131 J	[1]	KIT (Shaft Parts-Nut & Lockwasher)
30.	2L-0611	[1]	BEARING
31.	1P-1134	[1]	RACE
32.	1P-1086 J	[1]	KIT (Frame Screw-4 Screws)
33.	1P-1079	[1]	HEAD ASSEM.
34.	4B-4274	[1]	WASHER
35.	2P-2232	[1]	GASKET
	7S-5897		ALTERNATOR ASSEM.
			CONSISTS OF ALL PARTS EXCEPT THOSE MARKED BY H.
			REPAIR KITS ARE AVAILABLE MARKED J

#UEG0597S0072

2P-9575: ALTERNATOR HEAD GROUP

ALTERNATOR HEAD GROUP

2P9575 ALTERNATOR HEAD GROUP
Serial No. 50S1 to 50S123 inclusive
For Field Replacement of 1P1079 Head Assembly

c117518 UEG0597S

2P9575 ALTERNATOR HEAD GROUP Parts scheme

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Qty	Parts name
1.	[1]	PLUG (Use As Required)
	[1]	PLUG (Use As Required)
2.	[1]	WIRE ASSEM.
	[1]	TERMINAL
3.	[1]	TERMINAL
4.	[1]	NUT
	[1]	TERMINAL
5.	[1]	KIT (4 Gaskets)
6.	[1]	BOOT
	[1]	TERMINAL
7.	[1]	HEAD ASSEM.

#UEG0597S0073

2P-1204: ALTERNATOR GP

ALTERNATOR GP

2P1204 ALTERNATOR GROUP--24 Volt, 19 Ampere
Serial No. 50S124-Up and 55U1-Up
Part of 9S2563 Alternator Group shown on Page 51

c207038 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	031-0243	[3]	SCREW
2.	6N-3821 CS	[1]	REGULATOR ASSEM.
	3K-6234	[1]	SCREW
	4B-4863	[1]	WASHER
3.	009-8708	[2]	BOOT
4.	2L-8076	[1]	TERMINAL
5.	2L-8077	[1]	TERMINAL
6.	1P-1091 T		KIT-(Reg. Mounting Plate and Gasket)
7.	1P-1145	[1]	HOLDER ASSEM.
	1P-1137	[2]	HOLDER
8.	4B-2049	[4]	NUT
	3B-4502	[4]	LOCKWASHER
9.	1P-1138	[1]	FIELD TERMINAL AND PLATE ASSEM.
10.	5S-4245	[2]	SCREW
	6B-4542	[2]	LOCKWASHER
11.	4B-4274	[1]	WASHER
12.	1P-1130 T	[1]	KIT (2 Brushes)
13.	032-4000	[4]	SCREW
14.	2P-1714 T	[1]	KIT (4 Gaskets)
15.	1P-1080 T	[1]	KIT (Retainer and Seals)
16.	6N-6717 CT	[1]	KIT (insulator)
			(Terminal Stud)
17.	2P-1709	[1]	RECTIFIER AND STATOR ASSEM.
18.	2P-1719	[1]	PLATE AND RECTIFIER ASSEM.
			(Positive)
	2P-1720	[1]	PLATE AND RECTIFIER ASSEM.
			(Negative)
19.	6N-1226 C	[1]	ROTOR ASSEM.
20.	1B-8705	[1]	KEY
21.	3B-4502	[10]	LOCKWASHER
22.	6N-5255 C	[1]	HEAD ASSEM.
23.	6D-9953	[2]	PIN
24.	1B-5387 C	[1]	BEARING
25.	2P-1713 T	[1]	KIT (Retainer and Seal)
			(Retainer, Seal, Spacer, Washer)
26.	017-2311	[3]	SCREW
27.	9M-5520	[1]	SCREW
28.	3B-4511	[1]	LOCKWASHER
29.	1P-1131 T	[1]	KIT (Shaft Parts-Nut and Lockwasher)
30.	2L-0611	[1]	BEARING
31.	1P-1134	[1]	RACE
32.	6N-5257 CT	[1]	KIT (frame screw-12 bolts)
33.	6N-5254 C	[1]	HEAD ASSEM.
34.	3B-4507	[2]	LOCKWASHER 11mm(.437 in.)I.D.
	3B-4504	[2]	LOCKWASHER 6.35mm(.25in.)I.D.
35.	1D-4718	[2]	NUT 11mm(.437 in.) I.D.
	9M-1311	[2]	NUT 6.35mm(.25 in.)I.D.
36.	2H-6139	[4]	LOCKWASHER
37.	1P-1088 T	[1]	KIT (2 Brush Springs)
38.	2P-6261 C	[2]	INSULATOR
	C		INDICATES CHANGE
	S		2P1698 ALTERNATOR ASSEM. CONSI
	T		REPAIR KITS ARE AVAILABLE MARK

#UEG0597S0074

7S-4090: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

STARTING MOTOR (7S4090 N/S)--24 Volt--Type 1
Serial No. 50S1 to 50S387 inclusive
7S5900 Motor parts are shown on Page 55

c114226 UEG0597S

7S4090 STARTING MOTOR GP-ELECTRIC Parts scheme

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Part No	Qty	Parts name
4H-7869	[1]	GASKET
8S-2332 C	[3]	BOLT
3B-4510 C	[3]	LOCKWASHER
7S-5900 Y	[1]	MOTOR ASSEM.
		(SEE SEPARATE ILLUSTRATION)
7H-1181	[1]	TERMINAL
		(PART OF WIRE ASSEM. 9F4337)
9F-4337	[1]	WIRE ASSEM.
9F-5509	[2]	INSULATOR
7F-8032	[1]	TERMINAL (GROUND)
		(PARTS OF WIRE ASSEM. 9F4337)
C		INDICATES CHANGE
Y		SEPARATE ILLUSTRATION

#UEG0597S0075

9S-7976: SOLENOID AS

SOLENOID AS

9S7976 SOLENOID ASSEMBLY--24 Volt
Part of 2P2501 and 7S5900 Starting Motor Assembly shown on
Pages 54D and 55

c115899 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9M-7657 C	[4]	NUT-SEALING
2.	8S-8023	[1]	COVER AS
3.	8S-8024	[1]	GASKET-COVER
4.	9B-7235	[1]	SCREW-MACHINE
	9B-7233	[1]	LOCKWASHER
5.	8S-1528	[1]	BOOT
6.	8S-8021	[1]	CORE AS

			THE FOLLOWING REPAIR
			KITS ARE AVAILABLE:
	8S-1524	[1]	KIT-TERMINAL STUD (BATTERY)
	8S-1525	[1]	KIT-TERMINAL STUD (MOTOR)
	9S-8688	[1]	KIT-CONTACT END CORE
	8S-1527	[1]	KIT-YOKE END CORE
	C		CHANGE FROM PREVIOUS TYPE

#UEG0597S0076

7S-4090: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

STARTING MOTOR (7S4090 N/S)--24 Volt--Type 2
Serial No. 50S1 to 50S387 inclusive
2P2502 & 2P2501 Motor parts are shown on Pages 54B, 54C & 54D

c141163 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Part No	Qty	Parts name
4H-7869	[1]	GASKET
8S-2332	[3]	BOLT
3B-4510	[3]	LOCKWASHER
2P-2502 C	[1]	MOTOR GROUP
		-OR-
2P-2501 CY	[1]	MOTOR GROUP
		(Separate Illustration)
7H-1181	[1]	TERMINAL
		(PART OF WIRE ASSEM 9F4337)
9F-4337	[1]	WIRE ASSEM.
9F-5509	[2]	INSULATOR
7F-8032	[1]	TERMINAL (GROUND)
		(PARTS OF WIRE ASSEM. 9F4337)
C		INDICATES CHANGE
Y		SEPARATE ILLUSTRATION

#UEG0597S0077

7S-4090: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

STARTING MOTOR (7S4090 N/S)--24 Volt
Serial No. 50S388-Up and 55U1-Up
2P2502 and 3P6 Motor parts are shown on Pages 54B, 54C, 54A-3 & 54A-4

c117423 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2P-2502 C	[1]	MOTOR
			-OR-
	3P-0006 Y	[1]	MOTOR
			(Separate Illustration)
2.	8S-2332	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
	2S-0736 C	[3]	WASHER
3.	4H-7869	[1]	GASKET
4.	9F-4337	[1]	WIRE ASSEM.
5.	9F-3068	[1]	TERMINAL
6.	7F-8032	[1]	TERMINAL (Ground)
7.	9F-5509	[1]	INSULATOR
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#UEG0597S0078

6N-5123: SWITCH AS-SOLENOID

SWITCH AS-SOLENOID

6N5123 SOLENOID SWITCH ASSEMBLY
Part of 2P2502 Starting Motor Group shown on Page 54B

c217037 UEG0597S

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-0908 C	[ 1]	TERMINAL ASSEM.
			(Includes)
	4M-1834	[ 1]	PLATE
2.	7F-4907	[ 1]	STRIP
3.	3H-3681	[ 2]	NUT
4.	3B-4508	[ 4]	LOCKWASHER
5.	3H-3680	[ 2]	NUT
6.	7F-3494	[ 2]	WASHER
7.	4M-1836	[ 2]	INSULATOR
8.	4M-1837	[ 2]	BUSHING
9.	7F-4906 C	[ 1]	STUD
10.	7N-0909	[ 1]	TERMINAL ASSEM.
11.	9S-4490	[ 1]	GASKET
12.	4M-5274	[ 1]	SCREW
13.	9S-4489	[ 4]	SCREW ASSEM.
14.	4M-3217	[ 2]	SCREW
15.	4M-1814	[ 1]	CONTACT ASSEM.
16.	3P-0072	[ 1]	CASE ASSEM.
17.	1F-0073	[ 2]	CLIP
18.	4M-1815	[ 1]	SPRING
			INDICATES CHANGE

#UEG0597S0079

3P-0006: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

3P6 ELECTRIC STARTING MOTOR GROUP--Prestolite--24 Volt--Part 1 of 2
Serial No. 50S388-Up and 55U1-Up
Part of Starting Motor shown on Page 54A. 9S7976 Solenoid parts are shown on Page 54
Only separate parts serviced. When complete Assembly is required order 3P7

c207040 UEG0597S

3P0006 STARTING MOTOR GP-ELECTRIC Parts scheme

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Parts for your 518 WHEEL SKIDDER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1D-5117	[3]	NUT
2.	3B-4508	[6]	LOCKWASHER
3.	085-2771	[1]	CONNECTOR
4.	4N-9404 C	[1]	LEAD ASSEM.
5.	4N-4694	[1]	KIT (Field Terminal Stud)
			(Includes Stud, Bushing and Washers)
6.	1D-4719	[3]	NUT
7.	9S-7976 Y	[1]	SOLENOID ASSEM.
			(Separate Illustration)
8.	6H-3622	[4]	SCREW
	3B-4504	[4]	LOCKWASHER
	3K-6116	[4]	WASHER
9.	4M-3217	[2]	SCREW
10.	4B-1220	[3]	SCREW
11.	8S-6035	[1]	GASKET
12.	3B-4502	[4]	LOCKWASHER
13.	8S-2769	[1]	FIELD ASSEM. (Commutator End)
14.	2B-4602	[1]	PLUG
15.	8S-4682	[1]	KIT (Bearing and Wick)
16.	4N-4693		KIT (Commutator End Terminal Stud)
			(Includes Stud, Bushing and Washers)
17.	1D-4717	[1]	NUT (plain)
	1B-2578	[1]	NUT (jam)
	3B-4506	[2]	LOCKWASHER
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION