3N9414 AIR STARTING MOTOR GROUP Part of 3N9569 and 3N9571 Air Starting Motor Groups shown on Pages 70-1c, 70-1g, 70-4 and 70-6 D399

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

0. 3N-9414 STARTING M
1. 7L-6915 MOTOR GP-A
2. 3N-0970 STARTING M
3. 3N-0970 STARTING M
4. 3N-0970 STARTING M
5. 3N-0970 STARTING M
6. 3N-9575 STARTING M
7. 3N-9575 STARTING M
8. 3N-9575 STARTING M
9. 3N-9575 STARTING M
0. INFORMATION

INDUSTRIAL ENGINE D399 INDUSTRIAL ENGINE 35B
D399 ENGINE 35B00001-00687 UE070074 D399 35B (1967)

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

3N-9412 MOTOR GP-AIR STARTING

3N-9413 STARTING MOTOR GP-AIR

3N-9414 STARTING MOTOR GP-AIR

7L-6915 MOTOR GP-AIR STARTING

3N-0970 STARTING MOTOR GP-AIR

#UE0700740320

3N-9414: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N9414 AIR STARTING MOTOR GROUP
Part of 3N9569 and 3N9571 Air Starting Motor Groups shown on Pages 70-1c, 70-1g, 70-4 and 70-6

c156570 UE070074

3N9414 STARTING MOTOR GP-AIR Parts scheme

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2H-3776	[1]	NUT
	2H-3779	[1]	LOCK
2.	6N-7547	[1]	WASHER
3.	2L-2094	[2]	BEARING
4.	6N-7545	[2]	SPACER
5.	6N-7540	[2]	PLATE
6.	6N-7537	[1]	CYLINDER
7.	6N-7536	[4]	RETAINER
8.	6N-7534	[1]	ROTOR
9.	6N-7538	[1]	DOWEL
10.	4S-5565	[2]	BOLT
11.	3B-4506	[16]	LOCKWASHER
12.	6N-7571	[1]	WASHER
13.	6N-7581	[1]	GEAR (31 teeth)
14.	2L-5271	[1]	BEARING
15.	6L-5897	[18]	BOLT
	8J-2418	[18]	LOCKWASHER
16.	2Y-1415	[2]	RETAINER
17.	4N-4402	[1]	SPACER
18.	4N-4400	[2]	RING
19.	4N-4398	[1]	PISTON ASSEM.
			(Includes)
20.	4N-4399	[1]	RING
21.	4N-4403	[1]	SPRING
22.	4N-4404	[1]	SEAT
23.	4N-4406	[1]	HOUSING ASSEM.
			(Includes)
24.	2B-4602	[1]	PLUG
	4N-4408	[1]	OILER
25.	4N-4407	[1]	BUSHING
26.	6N-7542	[1]	SHAFT
	6L-8794	[1]	KEY
27.	4N-9569	[1]	DRIVE ASSEM.
28.	0S-1616	[16]	BOLT
	3B-4504	[16]	LOCKWASHER
29.	6N-7362	[1]	COVER
30.	6N-7544	[1]	PINION
31.	6N-7535	[1]	RETAINER
32.	6N-7570	[2]	SCREW
	6N-7572	[2]	LOCKWASHER
33.	6N-7532	[1]	CASE ASSEM.
			(Includes)
34.	7B-5670	[1]	BEARING
35.	0S-1591	[6]	BOLT
	1D-4717	[6]	NUT
36.	6N-7543	[1]	HOUSING
37.	1A-2029	[8]	BOLT
38.	6N-7541	[1]	COVER ASSEM.
			THE FOLLOWING REPAIR KITS ARE AVAILABLE:
	6N-7533	[1]	KIT (Rotor Vane)
			(Includes 5 Vanes)
	6N-7363	[1]	KIT (Seal and Gasket)
			(Includes 3 seals and 5 gaskets)

#UE0700740321

7L-6915: MOTOR GP-AIR STARTING

MOTOR GP-AIR STARTING

7L6915 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation
Serial No. 35B1 to 35B493 and 35B495 to 35B523 inclusive
4N7556 Lubricator, 6L6730 Motor and 3L9922 Valve parts are shown on Pages 69A-8, 72, 72A and 75

c150095 UE070074

7L6915 MOTOR GP-AIR STARTING Parts scheme

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6F-9497	[1]	FITTING
2.	1B-2886	[2]	BOLT 9.53 cm(3.75 in.)long
3.	3B-4508	[4]	LOCKWASHER
4.	7F-8023	[1]	ELBOW
5.	0S-1595	[2]	BOLT 3.18 cm(1.25 in.) long
6.	6F-9206	[1]	GASKET
			(For use without Silencer and Vapor Arrestor)
7.	5B-7852	[1]	COVER (Flywheel Housing)
8.	3H-0510	[2]	GASKET
9.	0S-1592	[3]	BOLT
10.	3B-4510	[6]	LOCKWASHER
11.	0S-1589	[3]	BOLT
12.	0S-1594	[2]	BOLT
13.	3B-4506	[4]	LOCKWASHER
14.		[1]	BRACKET
15.	5L-2534	[1]	"U"-BOLT
16.	6B-3685	[4]	ELBOW
17.	6F-5985	[1]	COUPLING
18.	1D-4717	[2]	NUT
19.	3R-9595 C	[1]	NIPPLE
			(For use without Regulator)
20.	6L-1849	[1]	FLANGE
21.	6F-9206	[1]	GASKET
22.	3L-9922 Y	[1]	VALVE (Whistle)
			(See Separate Illustration)
23.	0S-1587	[4]	BOLT
24.	3B-4508	[4]	LOCKWASHER
25.	4N-7556 YC	[1]	LUBRICATOR GROUP
			(Separate Illustration)
26.	6L-7349	[1]	NIPPLE
27.	5B-7661	[4]	NIPPLE
28.	6L-6730 Y	[1]	MOTOR ASSEM.
			(Separate Illustration)
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#UE0700740322

3N-0970: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N970 AIR STARTING & PRELUBRICATION MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 1 of 2--Type 1
Serial No. 35B494 and 35B524-Up
3N706 Pump and Motor and 6L6730 Motor parts are shown on Pages 70D, 72 and 72A

c136357 UE070074

3N0970 STARTING MOTOR GP-AIR Parts scheme

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6F-9497	[1]	FITTING
2.	7F-8023	[1]	ELBOW
3.	1B-2886	[2]	BOLT
4.	3B-4508	[4]	LOCKWASHER
5.	0S-1595	[2]	BOLT
6.	6F-9206	[1]	GASKET
			(For Use Without Silencer and Vapor Arrestor)
7.	6L-6730 Y	[1]	MOTOR ASSEM.
			(See Separate Illustration)
8.	3H-0510	[2]	GASKET
9.	0S-1589	[3]	BOLT
10.	3B-4510	[6]	LOCKWASHER
11.	0S-1594	[2]	BOLT
12.	3B-4506	[4]	LOCKWASHER
13.	4B-4278	[2]	WASHER
14.	5L-1722	[1]	BRACKET
15.	6K-3886	[4]	CLIP (Use as Required)
16.	0S-0509	[2]	BOLT
17.	5B-7852	[1]	COVER (Flywheel Housing)
18.	4S-8387 H		TUBE 52"
19.	5K-9397	[6]	NUT
20.	5K-9249	[2]	UNION
21.	4S-8387 H		TUBE 28"
22.	4S-8387 H		TUBE 59"
23.	5K-9240	[2]	ELBOW
24.	2B-2694	[4]	BOLT
25.	1M-3381	[4]	SPACER
26.	3N-0706 Y	[1]	MOTOR ASSEM.
			(See Separate Illustration)
27.	0S-1592	[3]	BOLT
28.	3B-4505	[4]	LOCKWASHER
29.	0S-1590	[1]	BOLT
	3B-4506	[1]	LOCKWASHER
30.	4B-9634	[1]	SPACER
			(Use As Required On Right Side Of Machine)
	H		ORDER BY THE FOOT
	Y		SEPARATE ILLUSTRATION

#UE0700740323

3N-0970: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N970 AIR STARTING & PRELUBRICATION MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 2 of 2--Type 1
Serial No. 35B494 and 35B524-Up
4N7556 Air Motor Lubricator and 3L9922 Valve parts are shown on Pages 69A-8 and 75

c150495 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3N-0578	[1]	VALVE (Air)
2.	0S-1616	[2]	BOLT
	1B-4330	[2]	NUT
	3B-4504	[4]	LOCKWASHER
	4B-4276	[4]	WASHER
3.	3N-0752	[1]	TUBE ASSEM.
4.	6B-3685	[4]	ELBOW (use without regulator)
5.	5B-7661	[5]	NIPPLE
6.	1H-7722	[1]	NIPPLE
7.	6L-1849	[1]	FLANGE
	6F-9206	[1]	GASKET
8.	0S-1585	[4]	BOLT
	3B-4508	[4]	LOCKWASHER
9.	5P-1198 CH		TUBE 50.8 cm(20 in.)
10.	8B-5774	[1]	BUSHING
11.	5B-4855	[1]	BUSHING
12.	3R-9595 C	[1]	NIPPLE
			(For Use Without Regulator)
13.	5L-2534	[1]	U-BOLT
	1D-4717	[2]	NUT
14.	3B-4506	[2]	LOCKWASHER
15.	4B-4278	[2]	WASHER
16.	6F-5985	[1]	COUPLING
17.	3L-9922 Y	[1]	VALVE (Whistle)
			(Separate Illustration)
18.	4N-7556 YC	[1]	LUBRICATOR GROUP
			(Separate Illustration)
19.	6B-7280	[1]	ADAPTER
20.	1L-2782	[1]	TEE
21.	3N-0534	[1]	VALVE (air)
22.	5K-9241	[4]	FITTING
23.	3L-8992	[1]	NIPPLE
24.	5P-1198 H		TUBE 48.2 cm(19 in.)
25.	4B-8756	[4]	NUT
	H		ORDER BY THE CENTIMETRE
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE

#UE0700740324

3N-0970: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N970 AIR STARTING AND PRELUBRICATION MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 1 of 2--Type 2
Replaced by 3N9575 shown on Pages 71E through 71K. Serial No. 35B494 and 35B524-Up
3N706 Pump and Motor and 6L6730 Motor parts are shown on Pages 70D, 72 and 72A

c151177 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6F-9497	[1]	FITTING
2.	7F-8023	[1]	ELBOW
3.	1B-2886	[2]	BOLT
4.	3B-4508	[4]	LOCKWASHER
5.	0S-1595	[2]	BOLT
6.	6F-9206	[1]	GASKET
			(For Use Without Silencer and Vapor Arrestor)
7.	6L-6730 Y	[1]	MOTOR ASSEM.
			(See Separate Illustration)
8.	3H-0510	[2]	GASKET
9.	0S-1589	[3]	BOLT
10.	3B-4510	[6]	LOCKWASHER
11.	0S-1594	[2]	BOLT
12.	3B-4506 C	[6]	LOCKWASHER
13.	4B-4278 C	[4]	WASHER
14.	5L-1722	[1]	BRACKET
15.	6K-3886	[4]	CLIP (use as required)
16.	0S-0509	[2]	BOLT
17.	5B-7852	[1]	COVER (flywheel housing)
18.	5P-1202 CH		TUBE 132 cm(52 in.)
19.	5K-9397	[6]	NUT
20.	5K-9249	[2]	UNION
21.	5P-1202 CH		TUBE 73 cm(28.74 in.)
22.	5P-1202 CH		TUBE 150 cm(59 in.)
23.	5K-9240	[2]	ELBOW
24.	2B-2694	[4]	BOLT
25.	1M-3381	[4]	SPACER
26.	3N-0706 Y	[1]	MOTOR ASSEM.
			(Separate Illustration)
27.	0S-1592	[3]	BOLT
28.	3B-4505	[4]	LOCKWASHER
29.	0S-1590	[1]	BOLT
	3B-4506	[1]	LOCKWASHER
30.	4B-9634	[1]	SPACER
31.	1S-2318 C	[1]	PLATE
32.	0L-1351 C	[2]	BOLT
	1D-4717 C	[2]	NUT
	H		ORDER BY THE CENTIMETRE
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE

#UE0700740325

3N-0970: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N970 AIR STARTING AND PRELUBRICATION MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 2 of 2--Type 2
Serial No. 35B494 and 35B524-Up. 4N7556 Lubricator and 3L9922 Valve parts are shown on Pages 69A-8 and 75
Replaced by 3N9575 shown on Pages 71E through 71K

c151178 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3N-0578	[1]	VALVE (Air)
2.	0S-1618 C	[2]	BOLT
	1D-4716 C	[2]	NUT
	3B-4505 C	[4]	LOCKWASHER
	4B-4277 C	[4]	WASHER
3.	3N-0752	[1]	TUBE ASSEM.
4.	6B-3685	[4]	ELBOW (use without regulator)
5.	5B-7661	[5]	NIPPLE
6.	1H-7722	[1]	NIPPLE
7.	6L-1849	[1]	FLANGE
	6F-9206	[1]	GASKET
8.	0S-1585	[4]	BOLT
	3B-4508	[4]	LOCKWASHER
9.	5P-1198 H		TUBE 50.8 cm(20 in.)
10.	8B-5774	[1]	BUSHING
11.	5B-4855	[1]	BUSHING
12.	3R-9595 C	[1]	NIPPLE
			(For Use Without Regulator)
13.	5L-2534	[1]	U-BOLT
	1D-4717	[2]	NUT
14.	3B-4506	[2]	LOCKWASHER
15.	4B-4278	[2]	WASHER
16.	6F-5985	[1]	COUPLING
17.	3L-9922 Y	[1]	VALVE (Whistle)
			Separate Illustration)
18.	4N-7556 Y	[1]	LUBRICATOR GROUP
			(Separate Illustration)
19.	6B-7280	[1]	ADAPTER
20.	1L-2782	[1]	TEE
21.	3N-8134 C	[1]	VALVE (air)
22.	5K-9241 C	[4]	FITTING
23.	3L-8993 C	[1]	NIPPLE
24.	3N-8138 C	[1]	TUBE ASSEM.
25.	4B-8756	[2]	NUT
	H		ORDER BY THE CENTIMETRE
	Y		SEPARATE ILLUSTRATION
	C		INDICATES CHANGE

#UE0700740326

3N-9575: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N9575 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 1 of 2--Type 1
Serial No. 35B524-Up. 4N7556 Lubricator and 3L9922 Valve parts are shown on Pages 69A-8 and 75

c156571 UE070074

3N9575 STARTING MOTOR GP-AIR Parts scheme

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6B-3685	[4]	ELBOW
2.	1L-2893	[1]	NIPPLE
3.	4H-0529	[1]	UNION
4.	3N-9383	[2]	NIPPLE
5.	7K-1990		HOSE ASSEM. 9.14 dm(36 in.)
6.	7J-8611	[2]	ELBOW
7.	3N-9363	[1]	BRACKET
8.	0S-1594	[2]	BOLT
9.	5M-2894	[4]	WASHER
	3B-4506	[4]	LOCKWASHER
10.	6F-5985	[1]	COUPLING (hose)
11.	5L-2534	[1]	U-BOLT
	1D-4717	[2]	NUT
12.	3R-9595	[1]	NIPPLE
			(For Use Without Regulator)
13.	3L-9922 Y	[1]	VALVE (whistle)
			(Separate Illustration)
14.	5B-7661	[5]	NIPPLE
15.	4N-7556 Y	[1]	LUBRICATOR GROUP
			(Separate Illustration)
16.	1L-2782	[1]	TEE
17.	5N-2834	[1]	VALVE
18.	5K-9241	[4]	FITTING
19.	3N-0578	[2]	VALVE
20.	0S-1618	[2]	BOLT
	1D-4716	[2]	NUT
	3B-4505	[2]	LOCKWASHER
	4B-4277	[2]	WASHER
21.	3N-9402	[1]	TUBE ASSEM.
22.	3N-9406	[1]	TUBE ASSEM.
23.	6B-7280	[1]	ADAPTER
24.	0S-1592	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
25.	5B-7852	[1]	COVER
26.	3H-0510	[1]	GASKET
27.	3N-0752	[1]	TUBE ASSEM.
	Y		SEPARATE ILLUSTRATION

#UE0700740327

3N-9575: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N9575 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 2 of 2--Type 1
Serial No. 35B524-Up. 3N706 and 3N9412 Motor parts are shown on Pages 70D and 70F

c156572 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5B-7660	[1]	BUSHING
2.	3N-9412 Y	[1]	MOTOR GROUP
			(Separate Illustration)
3.	3H-0510	[1]	GASKET
4.	0S-1566	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
5.	3N-9409	[1]	BUSHING
6.	3B-7296	[1]	NIPPLE
7.	3B-6500	[1]	ELBOW
8.	6F-9497	[1]	FITTING
9.	5K-9249	[2]	UNION
10.	5K-9397	[4]	NUT
11.	5P-1202 H		TUBE 132 cm(52 in.)
12.	6K-3886	[3]	CLIP
13.	0L-1351	[2]	BOLT
	1D-4717	[2]	NUT
	4B-4278	[2]	WASHER
14.	3B-4506	[4]	LOCKWASHER
15.	0S-0509	[2]	BOLT
16.	1S-2318	[2]	PLATE
17.	3N-9407	[1]	TUBE ASSEM.
18.	5K-9240	[2]	ELBOW
19.	5B-4855	[1]	BUSHING
20.	8B-5774	[1]	BUSHING
21.	5B-0213	[1]	BOLT
	5M-2894	[1]	WASHER
	3L-3825	[1]	SPACER
22.	5P-1202 H		TUBE 149 cm(58.67 in.)
23.	2B-2694	[4]	BOLT
	3B-4505	[4]	LOCKWASHER
	1M-3381	[4]	SPACER
24.	3N-0706 Y	[1]	MOTOR ASSEM.
			(Separate Illustration)
	H		ORDER BY THE CENTIMETRE
	Y		SEPARATE ILLUSTRATION

#UE0700740328

3N-9575: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N9575 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 1 of 2--Type 2
Serial No. 35B524-Up. 3N706 Motor parts are shown on Page 70D

c159893 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3N-0706 Y	[1]	MOTOR ASSEM.
			(Separate Illustration)
2.	5K-9240 C	[1]	ELBOW
3.	5P-1202 H		TUBE 149 cm(58.67 in.)
4.	6K-3886	[3]	CLIP
5.	5B-7852	[1]	COVER
6.	0S-1592	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
7.	3H-0510	[1]	GASKET
8.	8B-5774	[1]	BUSHING
9.	5B-4855	[1]	BUSHING
10.	9L-3560 C	[1]	ELBOW
11.	5K-9249 C	[1]	UNION
12.	5K-9397	[4]	NUT
13.	5P-1202 H		TUBE 132 cm(52 in.)
14.	1S-2318	[2]	PLATE
15.	0S-0509	[2]	BOLT
16.	3B-4506	[4]	LOCKWASHER
17.	0L-1351	[2]	BOLT
	1D-4717	[2]	NUT
	4B-4278	[2]	WASHER
18.	9S-7694 C	[1]	CONNECTOR
19.	9M-6544 C		HOSE ASSEM. 1.02 m(40 in.)
20.	5B-0213	[1]	BOLT
	5M-2894	[1]	WASHER
	3L-3825	[1]	SPACER
21.	2B-2694	[4]	BOLT
	1M-3381	[4]	SPACER
	3B-4505	[4]	LOCKWASHER
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE CENTIMETRE

#UE0700740329

3N-9575: STARTING MOTOR GP-AIR

STARTING MOTOR GP-AIR

3N9575 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 2 of 2--Type 2
Serial No. 35B524-Up
4N7556 Lubricator, 3N9412 Motor and 3L9922 Valve parts are shown on Pages 69A-8, 70F and 75

c159894 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1618	[2]	BOLT
2.	1D-4716 C	[4]	NUT
	3B-4505 C	[4]	LOCKWASHER
	4B-4277 C	[6]	WASHER
3.	3N-0752	[1]	TUBE ASSEM.
4.	4H-0529	[1]	UNION
5.	5B-7661 C	[4]	NIPPLE
6.	2L-2813 C	[1]	ELBOW
7.	5B-7666 C	[4]	ELBOW
8.	5N-2834	[1]	VALVE (air)
9.	7J-8611	[5]	ELBOW
10.	3B-6768 C	[1]	BUSHING
11.	3L-8993 C	[1]	NIPPLE
12.	5B-7660	[1]	BUSHING
13.	7K-1990	[1]	HOSE ASSEM. .91 m(36 in.)
14.	1V-2937 C	[1]	HOSE ASSEM. .81 m(32 in.)
15.	3H-0510	[1]	GASKET
16.	3N-9412 Y	[1]	MOTOR GROUP
			(Separate Illustration)
17.	0S-1566	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
18.	5N-2729 C	[1]	BRACKET
19.	1D-4540 C	[2]	BOLT
20.	6B-3685 C	[1]	ELBOW
			(Use without regulator)
21.	6F-5985	[1]	COUPLING
22.	1H-2815 C	[1]	NIPPLE
23.	5L-2534	[1]	"U" BOLT
	1D-4717	[2]	NUT
	3B-4506 C	[2]	LOCKWASHER
	5M-2894 C	[2]	WASHER
24.	3B-6500	[1]	ELBOW
25.	6F-9497	[1]	FITTING
26.	3B-7296	[1]	NIPPLE
27.	3N-9409	[1]	BUSHING
28.	3L-9922	[1]	VALVE (whistle)
29.	4N-7556 Y	[1]	LUBRICATOR GROUP
			(Separate Illustration)
30.	5P-5773 C	[1]	ELBOW
31.	1V-8309 C	[1]	HOSE ASSEM. .29 m(11.5 in.)
	3B-8822 C	[1]	ELBOW
32.	3N-0578	[1]	VALVE (air)
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

Information:

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

General Service Information

Introduction
DELCO REMY CRANKING MOTORS 30-MT, 35-MT, 40-MT, 50-MT SERIES

Delco Remy
DELCO REMY CRANKING MOTORS 30-MT, 35-MT, 40-MT, 50-MT SERIES

Engine News

New Air Starting Motor Group Available
1982/08/25

New Air Starting Motor Has A Slip-Clutch Type Drive Gear
1983/10/26

Bypass Valve Can Be Installed To Keep Prelubrication Oil At The Correct Level
1984/04/11

12-Volt Starter Solenoid Available For 7T2265 And 7T2266 Starting Motors
1987/02/01

Modification To Prevent Starter From Remaining Engaged With Flywheel After Engine Starts
1987/03/01

Testing The Starter On The Engine
1987/05/01

Remanufactured Heavy-Duty Starters And High-Amp Alternators
1987/06/01

Be Sure Battery Cable To Starter Connection Has Correct Torque
1988/03/01

Magnetic Switches (Starter Relays) Improved
1988/03/01

Air Starter Relay Valve Improved
1991/07/01

Improved Remanufactured Electric Starting Motors are Now Available {1453}
2003/11/01

Special Instruction

Installation of Electric Starting Motors{1453}
Installation of Electric Starting Motors{1453}

Caterpillar PRELUB® Diagnostics{1469}
Caterpillar PRELUB^® Diagnostics{1469}

Solenoid (Starting Motor) − Replace{1467}
Solenoid (Starting Motor) − Replace{1467}

Installation of New Shift Lever Assembly for All Starter Motors {1453}
Installation of New Shift Lever Assembly for All Starter Motors {1453}

Procedure to Install the Insulator on to Series Starters on All Engines {1453}
Procedure to Install the Insulator on to Series Starters on All Engines {1453}

Installation of Repair Kit-Solenoid Plunger Assembly on All Engines {1453}
Installation of Repair Kit-Solenoid Plunger Assembly on All Engines {1453}

Procedure to Install Terminal Kit on All Engines {1453}
Procedure to Install Terminal Kit on All Engines {1453}

Procedure to Install Brush Holder Assembly in All Engines {1453}
Procedure to Install Brush Holder Assembly in All Engines {1453}

Procedure to Replace Armature of Starter Motor On All Cat® Products {1408, 1450, 1453}
Procedure to Replace Armature of Starter Motor On All Cat^® Products {1408, 1450, 1453}

Procedure to Replace Commutator End (CE) Housing of Starter Motor On All Cat® Products {1408, 1450, 1453}
Procedure to Replace Commutator End (CE) Housing of Starter Motor On All Cat^® Products {1408, 1450, 1453}

Procedure to Replace Drive Assembly of Starter Motor On All Cat® Products {1453}
Procedure to Replace Drive Assembly of Starter Motor On All Cat^® Products {1453}

Specifications

Starting Motors
D399, G399, D398, G398, D379, G379 ENGINES

Starter Solenoids
D399, G399, D398, G398, D379, G379 ENGINES

Prelube Motor Relay; (Later Type)
D399, G399, D398, G398, D379, G379 ENGINES

Air Valves For Air Starting System
D399, G399, D398, G398, D379, G379 ENGINES

Prelubrication Pump And Air Motor
D399, G399, D398, G398, D379, G379 ENGINES

Air Starting Motors (3H3170, 3H3171)
D399, G399, D398, G398, D379, G379 ENGINES

Prelube Pump
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Starter Motor
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Starter Solenoids
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Pressure Regulating Valve For Air Starting Motor
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Air Starting Motor
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Hydraulic Starting Motor
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Charging Pump For Hydraulic Starting
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Hand Pump For Hydraulic Starter
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Pressure Accumulator For Hydraulic Starter
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Starting Motor
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor
Starting Motor - Delco 50-MT

Systems Operation

General Information
37-MT, 41-MT, and 42-MT Series Starting Motors

Component Description
37-MT, 41-MT, and 42-MT Series Starting Motors

Normal Operation
37-MT, 41-MT, and 42-MT Series Starting Motors

Component Description
Starting Motor - Delco 50-MT

General Information
Starting Motor - Delco 50-MT

Normal Operation
Starting Motor - Delco 50-MT

Testing and Adjusting

Engaged Starting Motor - Troubleshoot
Electronic Modular Control Panel II (EMCP II) For MUI Engines

No Load - Test
37-MT, 41-MT, and 42-MT Series Starting Motors

Brush and Brush Holder - Check
37-MT, 41-MT, and 42-MT Series Starting Motors

Pinion Clearance - Adjust
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor Solenoid - Test
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor Magnetic Switch - Test
Electronic Modular Control Panel II (EMCP II) For MUI Engines

Starting Motor Solenoid - Test
Starting Motor - Delco 50-MT

Field Winding - Test
Starting Motor - Delco 50-MT

Armature - Test
Starting Motor - Delco 50-MT

Brush and Brush Holder - Check
Starting Motor - Delco 50-MT

Pinion Drive - Check
Starting Motor - Delco 50-MT

No Load - Test
Starting Motor - Delco 50-MT

Pinion Clearance - Adjust
Starting Motor - Delco 50-MT

Troubleshooting

Engine Does Not Crank with Starting Motor On and Pinion Engaging Ring Gear
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor Does Not Turn or Turns Slowly
37-MT, 41-MT, and 42-MT Series Starting Motors

General Information
37-MT, 41-MT, and 42-MT Series Starting Motors

General Information
Starting Motor - Delco 50-MT

Pinion Does Not Engage Ring Gear
Starting Motor - Delco 50-MT

Engine Does Not Crank with Starting Motor On and Pinion Engaging Ring Gear
Starting Motor - Delco 50-MT

Starting Motor Continues to Operate after Start Switch Has Been Released
Starting Motor - Delco 50-MT

Pinion Continues to Engage after Engine Starts
Starting Motor - Delco 50-MT

Starting Motor Does Not Turn or Turns Slowly
Starting Motor - Delco 50-MT

Disassembly and Assembly

Air Starting Motor
D399, G399, D398, G398, D379, G379 ENGINES

Prelubrication Oil Pump (D399)
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Sump Pump
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Electric Starting Motors
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Air Starter
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Starting Motor - Disassemble - 37-MT and 41-MT
37-MT, 41-MT, and 42-MT Series Starting Motors

General Information
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor - Assemble - 37-MT and 41-MT
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor - Disassemble - 42-MT
37-MT, 41-MT, and 42-MT Series Starting Motors

Starting Motor - Assemble - 42-MT
37-MT, 41-MT, and 42-MT Series Starting Motors

General Information
Starting Motor - Delco 50-MT

Starting Motor - Disassemble
Starting Motor - Delco 50-MT

Starting Motor - Assemble
Starting Motor - Delco 50-MT

Service Magazine

Replacement Of Brush Holder Pins In Delco-Remy Electric Starting Motors{1453}
1982/06/28

New Air Starting Motor Group Available{1451}
1982/07/19

New Air Starting Motor Has A Slip-Clutch Type Drive Gear{1451}
1983/10/17

Bypass Valve Can Be Installed To Keep Prelubrication Oil At The Correct Level{1319}
1984/04/09

New Start Switch Used {1416,1453}
1986/07/07

Adjust Bosch Solenoid If Replaced Or Reinstalled{1407,1453}
1986/11/10

12-Volt Starter Solenoid Available For 7T2265 And 7T2266 Starting Motors{1407}
1987/02/16

Modification To Prevent Starter From Remaining Engaged With Flywheel After Engine Starts{1400,1450}
1987/03/16

Testing The Starter On The Engine{1401,1450}
1987/05/04

Remanufactured Heavy-Duty Starters And High-Amp Alternators{1405,1453}
1987/05/25

Be Sure Battery Cable-To-Starter Connection Has Correct Torque{1453}
1988/03/14

Magnetic Switches (Starter Relays) Improved{1450}
1988/03/14

Two Plug Assemblies (Booster Cables) Are Available To Start Machines{1401,1453}
1979/11/05

Limitations On Engine Cranking Time{1453,1401}
1989/03/27

Causes And Effects Of Low Battery Voltage On Electric Starters{1401,1453,1467}
1989/04/24

Air Starter Relay Valve Improved{1462}
1991/06/24

Caterpillar Parts SIS Catalog D399 :

3N-9413 STARTING MOTOR GP-AIR

3N-9412 MOTOR GP-AIR STARTING

3N-9411 STARTING MOTOR GP-AIR

3N-0706 PUMP & MOTOR AS-PRELUB

3N-9573 STARTING MOTOR GP-AIR

7L-6915 MOTOR GP-AIR STARTING

3N-0970 STARTING MOTOR GP-AIR

3N-9575 STARTING MOTOR GP-AIR

Truck sale:

Caterpillar D399
- Industrial engines
WHEELER MACHINERY CO.

130.000

Caterpillar D399, Industriemaschinen, Bau-Und Bergbauausrüstung
- Industrial engines
LOUISIANA CAT POWER SYSTEMS

USD $12,000

CAT D399

L&K Machinery

USD $8,995

CAT D399

Surplus Heavy Equipment & Parts
Long Branch, New Jersey

CAT D399

Yoder & Frey Auctioneers
Ashland, Ohio