6N9677 ELECTRIC STARTING MOTOR GROUP--24 Volt--Part 3 of 3 Serial No. 50W931-Up Part of 4N1061 Electric Starting Motor Group shown on Page 102A 988B

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

0. 6N-9677 STARTING M
1. 4N-1061 STARTING M

SWITCH GP

2. 6N-5123 SWITCH AS-

STARTING MOTOR GP

3. 4N-1061 STARTING M

SWITCH GP

4. 4M-1812 SWITCH AS-

GLOW PLUG GP

5. 4N-2008 PLUG GP-GL

STARTING AID GP

6. 8N-2800 STARTING A
7. 8N-2800 STARTING A

ALTERNATOR GP-CHARGING

8. 4N-2185 ALTERNATOR
9. 1W-5271 ALTERNATOR
0. INFORMATION

WHEEL LOADER 988B WHEEL LOADER 50W
988B WHEEL LOADER 50W00001-06040 (MACHINE) POWERED BY 3408 ENGINE SEBP1079 988B 50W (1976)

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

4N-0959 STARTING MOTOR GP-ELECTRIC

6N-9677 STARTING MOTOR GP-ELECTRIC

4N-1061 STARTING MOTOR GP-ELECTRIC

#SEBP10790340

6N-9677: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

6N9677 ELECTRIC STARTING MOTOR GROUP--24 Volt--Part 3 of 3
Serial No. 50W931-Up
Part of 4N1061 Electric Starting Motor Group shown on Page 102A

c163778 SEBP1079

6N9677 STARTING MOTOR GP-ELECTRIC Parts scheme

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4M-1831	[4]	PLUG-LEVER HOUSING
	7L-2894	[4]	GASKET
2.	1S-0297	[1]	HOUSING AS-DRIVE
3.	4M-1896	[1]	BUSHING
4.	7F-4556	[13]	BOLT
	8H-3481	[13]	LOCKWASHER
5.	3F-0379	[12]	SCREW-POLE SHOE
6.	7M-0330	[1]	PLATE AS-BRUSH
7.	7M-0331	[1]	PLATE AS
8.	7F-7611	[3]	SCREW
9.	7H-2079	[12]	LOCKWASHER
	7F-3525	[12]	WASHER-BUSHING
10.	7M-0332	[1]	PLATE-INSULATOR
11.	7F-3513	[6]	HOLDER-BRUSH
12.	3H-3697	[3]	SCREW-SPECIAL
13.	7F-3512	[12]	SPRING-BRUSH
14.	7F-3521	[3]	PLATE (HOLDER)
15.	7F-3520	[1]	PLATE-CONNECTOR
16.	5H-6467	[3]	SCREW-MACHINE
17.	2L-6679	[3]	PLATE-INSULATOR
18.	7F-3522	[1]	SCREW-HOLDER
			THE FOLLOWING REPAIR
			KIT IS AVAILABLE:
	3N-3763	[1]	KIT-TERMINAL (INCL BUSHINGS,
			WASHERS & INSULATOR)

#SEBP10790341

4N-1061: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

4N1061 ELECTRIC STARTING MOTOR GROUP--24 Volt--L.H. Mounted
Serial No. 50W1 to 50W930 inclusive
4N959 Motor parts are shown on Pages 100 and 101

c932272 SEBP1079

4N1061 STARTING MOTOR GP-ELECTRIC Parts scheme

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8S-2332	[3]	BOLT
2.	4H-7869	[1]	GASKET
3.	4N-0959 Y	[1]	MOTOR GROUP
			(Separate Illustration)
4.	9F-4337	[1]	WIRE ASSEM.
			(Includes)
	5P-0606 H		WIRE 2.29 dm(9 in.)
5.	2L-8052	[1]	TERMINAL
6.	2L-8054	[1]	TERMINAL
	H		ORDER BY THE DECIMETRE
	Y		SEPARATE ILLUSTRATION

#SEBP10790342

6N-5123: SWITCH AS-SOLENOID

SWITCH AS-SOLENOID

6N5123 SOLENOID SWITCH ASSEMBLY--24 Volt
Serial No. 50W1 to 50W930 inclusive
Part of 4N959 Electric Starting Motor Group shown on Page 101

c229022 SEBP1079

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Parts for your 988B WHEEL LOADER:

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 (large)
			-OR-
	5P-9132 C	[1]	SCREW (small)
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
	C		INDICATES CHANGE

#SEBP10790343

4N-1061: STARTING MOTOR GP-ELECTRIC

STARTING MOTOR GP-ELECTRIC

4N1061 ELECTRIC STARTING MOTOR GROUP--24 Volt--L.H. Mounted
Serial No. 50W931-Up
6N9677 Motor parts are shown on Pages 101A, 101B and 101D

c163770 SEBP1079

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8S-2332	[3]	BOLT
2.	4H-7869	[1]	GASKET
3.	6N-9677 YC	[1]	MOTOR GROUP
			(Separate Illustration)
4.	9F-4337	[1]	WIRE ASSEM.
			(Includes)
	5P-6641 CH		WIRE .23 m(9 in.)
5.	2L-8052	[1]	TERMINAL
6.	2L-8054	[1]	TERMINAL
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE METRE

#SEBP10790344

4M-1812: SWITCH AS-SOLENOID

SWITCH AS-SOLENOID

4M1812 SOLENOID SWITCH ASSEMBLY--24 Volt
Serial No. 50W931-Up
Part of 6N9677 Electric Starting Motor Group shown on Page 101A

c228187 SEBP1079

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-1269 C	[1]	TERMINAL & PLATE AS
	4M-1834	[1]	PLATE-TERMINAL
2.	7F-4907	[1]	STRIP-INSULATION
3.	3H-3681	[2]	NUT-FULL
4.	3B-4508	[4]	LOCKWASHER
5.	3H-3680	[2]	NUT-JAM
6.	7F-3494	[2]	WASHER-STUD
7.	4M-1836	[2]	INSULATOR
8.	4M-1837	[2]	BUSHING
9.	7F-4906	[1]	STUD-TERMINAL
10.	4M-2800	[1]	TERMINAL
11.	7N-1271	[1]	TERMINAL AS
12.	4M-5274	[1]	SCREW-MACHINE (HEX HEAD)
	5P-9132 C	[1]	SCREW-WASHER HEAD (TRUSS HEAD)
13.	1P-3879	[1]	LEAD AS
14.	4M-3217	[2]	SCREW
15.	9G-6770 C	[1]	CONTACT AS
16.	4M-1813	[1]	CASE & COIL AS
17.	1F-0073	[2]	CLAMP
18.	4M-1815	[1]	SPRING-CONTACT
19.	9M-7657	[4]	NUT-SEALING
	9S-4489	[4]	SCREW AS
20.	9S-4490	[4]	GASKET-PLATE
	C		CHANGE FROM PREVIOUS TYPE

#SEBP10790345

4N-2008: PLUG GP-GLOW

PLUG GP-GLOW

4N2008 GLOW PLUG GROUP--24 Volt
Engine Serial No. 48W1 to 48W7684 inclusive

c219319 SEBP1079

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9L-8398 C	[4]	BOLT
2.	6N-2796	[2]	PLUG ASSEM.
3.	7N-9169 C	[2]	LEAD ASSEM.
			(Each Includes)
	8L-8413	[5]	STRAP
	2M-2642	[1]	TERMINAL
4.	4N-0360	[8]	GLOW PLUG

#SEBP10790346

8N-2800: STARTING AID GP-ETHER

STARTING AID GP-ETHER

8N2800 ETHER STARTING AID GROUP
Serial No. 50W3777 to 50W5140 inclusive
Note: 7N296 Ether Cylinder is used and must be purchased separately from your Caterpillar Dealer

c224831 SEBP1079

8N2800 STARTING AID GP-ETHER Parts scheme

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-2059	[1]	CLAMP ASSEM.
2.	0S-1617	[4]	BOLT
	9M-1974	[4]	WASHER
3.	8N-4054	[1]	BRACKET ASSEM.
			(Includes)
4.	4K-9097	[4]	NUT
5.	6N-7674	[1]	VALVE ASSEM.
			(Includes)
	5P-5610	[2]	CONNECTOR
6.	8N-4051	[1]	TUBE
7.	7N-0140	[1]	TUBE ASSEM.
8.	6S-5992	[4]	CLIP
	4D-0623	[4]	GROMMET
9.	0L-1351	[2]	BOLT
10.	5M-2894	[5]	WASHER
11.	8N-4052	[1]	TUBE
12.	6N-7672	[1]	ATOMIZER ASSEM.
13.	0S-1594	[3]	BOLT
14.	5P-2948	[1]	CONNECTOR

#SEBP10790347

8N-2800: STARTING AID GP-ETHER

STARTING AID GP-ETHER

8N2800 ETHER STARTING AID GROUP
Serial No. 50W5141-Up
Note: 7N296 Ether Cylinder is used and must be purchased separately from your Caterpillar Dealer

c233969 SEBP1079

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	7N-2059	[1]	CLAMP ASSEM.
2.	0S-1617	[4]	BOLT
	9M-1974	[4]	WASHER
3.	8N-4054	[1]	BRACKET ASSEM.
			(Includes)
4.	4K-9097	[4]	NUT
5.	3T-3111 C	[1]	VALVE ASSEM.
			(Includes)
	5P-5610	[2]	CONNECTOR
6.	8N-4051	[1]	TUBE
7.	7N-0140	[1]	TUBE ASSEM.
8.	6S-5992	[4]	CLIP
	4D-0623	[4]	GROMMET
9.	0L-1351	[2]	BOLT
10.	5M-2894	[5]	WASHER
11.	8N-4052	[1]	TUBE
12.	6N-7672	[1]	ATOMIZER ASSEM.
13.	0S-1594	[3]	BOLT
14.	5P-2948	[1]	CONNECTOR
	C		INDICATES CHANGE

#SEBP10790348

4N-2185: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

4N2185 ALTERNATOR GROUP
Serial No. 50W1 to 50W5604, 5606 to 5724, 5726 to 5785 and 50W5787 to 50W5793 inclusive
5S9088 Alternator parts are shown on Pages 104 and 105

c227414 SEBP1079

4N2185 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9L-6639	[1]	VEE BELT
2.	5B-9603	[1]	BOLT
3.	4N-6413	[1]	SUPPORT
4.	1A-1135	[1]	BOLT
5.	4D-3704 C	[2]	WASHER
6.	5H-0837	[1]	WIRE ASSEM.
			(Includes)
	2L-8058	[1]	TERMINAL
7.	9F-5384	[2]	INSULATOR
8.	2L-8054	[1]	TERMINAL
9.	1S-4698 C	[1]	ROD
10.	8S-5383	[1]	BLOCK
11.	1D-5118	[2]	NUT
12.	0S-1587 C	[1]	BOLT
13.	2M-0849 C	[4]	WASHER
14.	4N-8225	[1]	PULLEY
15.	5S-9088 RY	[1]	ALTERNATOR GROUP
			(Separate Illustration)
16.	0S-1585	[1]	BOLT 38.10 mm (1.50 in.) long
	1A-1460 C	[1]	BOLT 50.80 mm (2 in.) long
17.	0S-1589 C	[1]	BOLT
18.	6N-9364 C	[1]	BRACKET
19.	0S-1594 C	[3]	BOLT
	5M-2894 C	[3]	WASHER
20.	6N-9366 C	[1]	BRACKET
21.	0S-1595 C	[1]	BOLT
22.	8S-9191 C	[1]	BOLT
23.	0S-1571	[1]	BOLT
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE

#SEBP10790349

1W-5271: ALTERNATOR GP-CHARGING

ALTERNATOR GP-CHARGING

1W5271 ALTERNATOR GROUP
Serial No. 50W5605, 50W5725, 50W5786 & 50W5794-Up
5S9088 Alternator parts are shown on Pages 104 and 105

c300943 SEBP1079

1W5271 ALTERNATOR GP-CHARGING Parts scheme

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Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9L-6639	[1]	VEE BELT
2.	5B-9603	[1]	BOLT
3.	4N-6413	[1]	SUPPORT
4.	1A-1135	[1]	BOLT
5.	4D-3704	[2]	WASHER
6.	5H-0837	[1]	WIRE ASSEM.
			(Includes)
	5P-5689 H		WIRE .3m(11.8 in.)
	2L-8058	[1]	TERMINAL
7.	9F-5384	[2]	INSULATOR
8.	2L-8054	[1]	TERMINAL
9.	1S-4698	[1]	ROD
10.	8S-5383	[1]	BLOCK
11.	1D-5118	[2]	NUT
12.	0S-1587	[1]	BOLT
13.	2M-0849	[4]	WASHER
14.	4N-8225	[1]	PULLEY
15.	5S-9088 RY	[1]	ALTERNATOR GROUP
			(Separate Illustration)
16.	0S-1585	[1]	BOLT 38.10 mm (1.50 in.) long
	1A-1460	[1]	BOLT 50.80 mm (2 in.) long
17.	0S-1589	[1]	BOLT
18.	1W-5269	[1]	BRACKET
19.	0S-1594	[2]	BOLT
	5M-2894	[2]	WASHER
20.	6N-9366	[1]	BRACKET
21.	0S-1595	[1]	BOLT
22.	8S-9191	[1]	BOLT
23.	0S-1571	[1]	BOLT
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE METER