3N9575 AIR STARTING MOTOR GROUP--L.H.--S.A.E. Opposite Standard Engine Rotation--Part 1 of 2--Type 3 Serial No. 35B524-Up. 3N706 Motor parts are shown on Page 70D D399

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

0. 3N-9575 STARTING M
1. 3N-9575 STARTING M
2. 6L-6731 MOTOR AS-A
3. 6L-6731 MOTOR AS-A
4. 4N-6019 CHANGEOVER
5. 4N-4985 CHANGEOVER
6. 3H-3171 LUG
7. 3H-3171 LUG
8. 3H-3170 MOTOR GP-A
9. 3L-9922 VALVE GP-W
0. INFORMATION

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

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

3N-9575 STARTING MOTOR GP-AIR

6L-6731 MOTOR AS-AIR

#UE0700740330

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 3
Serial No. 35B524-Up. 3N706 Motor parts are shown on Page 70D

c209610 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.	3N-0706 Y	[1]	MOTOR ASSEM.
			(Separate Illustration)
2.	5K-9240	[1]	ELBOW
3.	5P-1202 CH		TUBE 149.8 cm(58.98 in.)
4.	4K-6066 C	[1]	CLIP
5.	5B-7852	[1]	COVER
6.	0S-1592	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
7.	3H-0510	[1]	GASKET
8.	9L-3560	[1]	ELBOW
9.	5B-4855	[1]	BUSHING
10.	8B-5774	[1]	BUSHING
11.	5K-9249	[1]	UNION
12.	5P-1202 CH		TUBE 132 cm(52 in.)
13.	6K-3886 C	[2]	CLIP
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.	5K-9397	[4]	NUT
19.	9S-7694	[1]	CONNECTOR
20.	3N-4829 C	[1]	HOSE ASSEM. 81.28 cm(32 in.)
21.	2B-2694	[4]	BOLT
	1M-3381	[4]	SPACER
	3B-4505	[4]	LOCKWASHER
22.	5B-0213	[1]	BOLT
	5M-2894	[1]	WASHER
	3L-3825	[1]	SPACER
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION
	H		ORDER BY THE CENTIMETRE

#UE0700740331

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 3
Serial No. 35B524-Up
4N7556 Lubricator, 3N9412 Motor and 3L9922 Valve parts are shown on Pages 69A-8, 70F and 75

c209611 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1618	[2]	BOLT
	1D-4716 C	[2]	NUT
	3B-4505 C	[2]	LOCKWASHER
	4B-4277 C	[4]	WASHER
2.	3N-0752	[1]	TUBE ASSEM.
3.	5N-2834	[1]	VALVE (air)
4.	3L-8992 C	[2]	NIPPLE
5.	5B-7666 C	[3]	ELBOW
6.	4H-0529	[1]	UNION
7.	7J-8611 C	[3]	ELBOW
8.	3B-6768 C	[2]	BUSHING
9.	5B-7660	[1]	BUSHING
10.	7K-1990	[1]	HOSE ASSEM. .91 m(36 in.)
11.	1V-2937	[1]	HOSE ASSEM. .81 m(32 in.)
12.	6L-5075 C	[2]	ELBOW
13.	3H-0510	[1]	GASKET
14.	3N-9412 Y	[1]	MOTOR GROUP
			(Separate Illustration)
15.	0S-1566	[3]	BOLT
	3B-4510	[3]	LOCKWASHER
16.	0S-1590 C	[2]	BOLT
17.	1D-4717 C	[4]	NUT
	3B-4506 C	[4]	LOCKWASHER
	5M-2894 C	[4]	WASHER
18.	5N-2729	[1]	BRACKET
19.	3L-9922 Y	[1]	VALVE (whistle)
			(Separate Illustration)
20.	6F-5985	[1]	COUPLING
21.	1H-2815	[1]	NIPPLE
22.	5L-2534	[1]	"U" BOLT
23.	3B-6500	[1]	ELBOW
	3B-7296	[1]	NIPPLE
	3N-9409	[1]	BUSHING
24.	4N-7556 Y	[1]	LUBRICATOR GROUP
			(Separate Illustration)
25.	6F-9497	[1]	FITTING
26.	5P-5773	[1]	ELBOW
27.	3B-8822	[1]	ELBOW
28.	6B-3685	[1]	ELBOW
			(Use Without Regualtor)
29.	6F-8857 C	[2]	NIPPLE
30.	4J-8334 C	[1]	HOSE ASSEM. 45.72 cm(18 in.)
31.	3N-0578	[1]	VALVE (air)
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#UE0700740332

6L-6731: MOTOR AS-AIR

MOTOR AS-AIR

6L6731 MOTOR ASSEMBLY--S.A.E. STANDARD ENGINE ROTATION--Type 1
PART OF 7L6914 & 7L6916 AIR STARTING SHOWN ON PAGES 68 & 69
6L6730 MOTOR ASSEMBLY--S.A.E. OPPOSITE STANDARD ENGINE ROTATION
PART OF 7L6913 & 7L6915 AIR STARTING SHOWN ON PAGES 70 & 71
3H3170 AIR MOTOR PARTS ARE SHOWN ON PAGE 74

c100801 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
3H-3170 Y	[1]	MOTOR
		(SAE OPPOSITE STANDARD ENGINE ROTATION)
		-OR-
3H-3171 Y	[1]	MOTOR
		(SAE STANDARD ENGINE ROTATION)
		(SEE SEPARATE ILLUSTRATION)
5K-1770	[1]	SEAL
0S-1618	[8]	BOLT
3B-4505	[8]	LOCKWASHER
9F-7216	[1]	SCREW
9F-7215	[1]	RING
7F-5452	[1]	SPRING
	[1]	STOP
4B-1273	[1]	SCREW
		(PARTS OF DRIVE ASSEM. IL7398 AND IL7340)
5L-5507	[1]	HOUSING ASSEM.
2B-4602	[2]	PLUG
7F-3539	[1]	WICK
		(PARTS OF ASSEM. 5L5507)
1L-7398	[1]	DRIVE ASSEM. (BENDIX)
		(SAE OPPOSITE STANDARD ENGINE ROTATION)
		-OR-
1L-7340	[1]	DRIVE ASSEM. (BENDIX)
		(SAE STANDARD ENGINE ROTATION)
7F-3538	[1]	BUSHING
		(PART OF HOUSING ASSEM. 5L5507)
Y		SEPARATE ILLUSTRATION

#UE0700740333

6L-6731: MOTOR AS-AIR

MOTOR AS-AIR

6L6731 MOTOR ASSEMBLY--Type 2
Part of 7L6914, 7L6916, 8L8409 and 8L8410 Motors shown
on Pages 68 through 69
6L6730 MOTOR ASSEMBLY--Type 2
Part of 7L6913, 7L6915, 8L8411 and 8L8412 Motors shown
on Pages 70 through 71. 3H3171 and 3H3170 Air Motor parts
are shown on Pages 73 and 74

c107049 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
3H-3170	[1]	MOTOR
		(SAE OPPOSITE STANDARD ENGINE ROTATION)
		-OR-
3H-3171 Y	[1]	MOTOR
		(SAE STANDARD ENGINE ROTATION)
		(SEE SEPARATE ILLUSTRATION)
5K-1770	[1]	SEAL
0S-1618	[8]	BOLT
3B-4505	[8]	LOCKWASHER
9F-7216	[1]	SCREW
9F-7215	[1]	RING
7F-5452	[1]	SPRING
4B-1273	[1]	SCREW
		(PARTS OF 1L7398 AND 1L7340 ASSEM.)
1N-8063	[1]	CAP
1N-8062	[1]	BEARING
		(PARTS OF 5L5507 ASSEM.)
1L-7398	[1]	DRIVE ASSEM. (BENDIX)
		(SAE OPPOSITE STANDARD ENGINE ROTATION)
		-OR-
1L-7340	[1]	DRIVE ASSEM. (BENDIX)
		(SAE STANDARD ENGINE ROTATION)
5L-5507	[1]	HOUSING ASSEM.
Y		SEPARATE ILLUSTRATION

#UE0700740334

4N-6019: CHANGEOVER GP

CHANGEOVER GP

4N6019 AIR START CHANGEOVER GROUP--S.A.E. Opposite Standard Engine Rotation--Field Installation
FOR USE WITH 6L6730 MOTOR ASSEMBLY SHOWN ON PAGES 72 AND 72A

c149287 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4N-9566	[1]	SHAFT
2.	4N-9567	[1]	KEY
3.	9F-5975	[8]	BOLT
4.	6H-3977	[1]	SEAL
5.	8F-8882	[1]	SEAL
6.	4N-4398	[1]	PISTON ASSEM.
			(Includes)
7.	4N-4399	[1]	RING
8.	4N-4404	[1]	SEAT
9.	4N-9569	[1]	CLUTCH ASSEM.
10.	4N-4406	[1]	HOUSING ASSEM.
			(Includes)
11.	2B-4602	[1]	PLUG
	4N-4408	[1]	OILER
12.	4N-4407	[1]	BUSHING
13.	4N-4403	[1]	SPRING
14.	4N-4400	[1]	RING
15.	4N-4402	[1]	SPACER
16.	052-0512	[1]	RETAINER
17.	0S-1616	[12]	BOLT
	3B-4504	[12]	LOCKWASHER
18.	4N-9565	[1]	COVER
19.	4N-3411	[1]	VALVE
20.	4N-3410	[1]	VALVE
21.	4N-4393	[1]	SEAL
22.	4N-9568	[1]	GEAR (drive 30 teeth)

#UE0700740335

4N-4985: CHANGEOVER GP

CHANGEOVER GP

4N4985 AIR START CHANGEOVER GROUP--S.A.E. Standard Engine Rotation--Field Installation
FOR USE WITH 6L6731 MOTOR ASSEMBLY SHOWN ON PAGES 72 AND 72A

c149286 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4N-9566	[1]	SHAFT
2.	4N-9567	[1]	KEY
3.	9F-5975	[8]	BOLT
4.	6H-3977	[1]	SEAL
5.	8F-8882	[1]	SEAL
6.	4N-4398	[1]	PISTON ASSEM.
			(Includes)
7.	4N-4399	[1]	RING
8.	4N-4404	[1]	SEAT
9.	4N-4405	[1]	CLUTCH ASSEM.
10.	4N-4406	[1]	HOUSING ASSEM.
			(Includes)
11.	2B-4602	[1]	PLUG
	4N-4408	[1]	OILER
12.	4N-4407	[1]	BUSHING
13.	4N-4403	[1]	SPRING
14.	4N-4400	[1]	RING
15.	4N-4402	[1]	SPACER
16.	052-0512	[1]	RETAINER
17.	0S-1616	[12]	BOLT
	3B-4504	[12]	LOCKWASHER
18.	4N-9565	[1]	COVER
19.	4N-3411	[1]	VALVE
20.	4N-3410	[1]	VALVE
21.	4N-4393	[1]	SEAL
22.	4N-9568	[1]	GEAR (drive-30 teeth)

#UE0700740336

3H-3171: LUG

LUG

3H3171 AIR MOTOR--Type 1
Part of 6L6731 Motor Assembly shown on Pages 72 and 72A

c100806 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
7L-7465	[5]	VANE
7F-5143	[1]	ROTOR
7F-5136	[1]	PLATE ASSEM
7F-5138	[1]	DOWEL (.437" THICK)
7F-5139	[1]	DOWEL (.50" THICK)
2F-4547	[4]	DOWEL (.25" DIA)
		(PARTS OF PLATE ASSEM 7F5136)
3H-1660	[2]	RING
7F-5421	[2]	SHIM (.002" THICK)
7F-5422	[2]	SHIM (.003" THICK)
7F-5423	[1]	SHIM (.005" THICK)
4B-4731	[1]	BEARING
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
7F-5156	[1]	GASKET
7F-9504	[3]	PLUG
2B-2695	[4]	BOLT
3B-4505	[4]	LOCKWASHER
2L-6221	[1]	COVER
4B-3388	[8]	BOLT
3B-4505	[8]	LOCKWASHER
7F-5145	[1]	HOUSING
7F-6284	[1]	RACE
7F-6283	[1]	BEARING
2L-6220	[1]	HOUSING
7F-5157	[1]	GASKET
7F-5171	[1]	WASHER
7F-5159	[1]	RING
7F-5164	[7]	BOLT
3B-4505	[7]	LOCKWASHER
6L-6705	[1]	COVER
0S-1614	[3]	BOLT
3B-4504	[3]	LOCKWASHER
7F-5158	[1]	PLATE
1B-8710	[2]	KEY
7F-5151	[1]	SHAFT
7F-5153	[1]	BEARING
7F-5149	[1]	GEAR
7F-5162	[1]	NUT
7F-5161	[1]	LOCKWASHER
7F-5152	[1]	RING
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
7F-5148	[1]	GEAR
5B-1975	[1]	BEARING ASSEM.
5B-1974	[1]	RACE
7F-5141	[1]	PLATE ASSEM.
7F-5138	[1]	DOWEL (.437" DIA.)
7F-5139	[1]	DOWEL (.50" DIA.)
2F-4547	[4]	DOWEL (.25" DIA.)
		(PARTS OF PLATE ASSEM. 7F5141)
1B-2719	[8]	BOLT
3B-4505	[8]	LOCKWASHER
7F-5160	[1]	GASKET

#UE0700740337

3H-3171: LUG

LUG

3H3171 AIR MOTOR--Type 2
Part of 6L6731 Motor Assembly shown on Pages 72 & 72A

c132941 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
7L-7465	[5]	VANE
7F-5143	[1]	ROTOR
7F-5136	[1]	PLATE ASSEM.
7F-5138	[1]	DOWEL (437" THICK)
7F-5139	[1]	DOWEL (.50" THICK)
2F-4547	[2]	DOWEL (.25" DIA.)
		(PARTS OF PLATE ASSEM. 7F5136)
3H-1660	[2]	RING
7F-5421	[2]	SHIM (.002" THICK)
7F-5422	[2]	SHIM (.003" THICK)
7F-5423	[1]	SHIM (.005" THICK)
4B-4731	[1]	BEARING
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
7F-5156	[1]	GASKET
7F-9504	[3]	PLUG
2B-2695	[4]	BOLT
3B-4505	[4]	LOCKWASHER
2L-6221	[1]	COVER
4B-3388	[8]	BOLT
3B-4505	[8]	LOCKWASHER
2N-7608	[1]	HOUSING
2N-7609	[1]	BEARING
2L-6220	[1]	HOUSING
007-5157	[1]	GASKET
7F-5164	[7]	BOLT
3B-4505	[7]	LOCKWASHER
6L-6705	[1]	COVER
0S-1614	[3]	BOLT
3B-4504	[3]	LOCKWASHER
7F-5158	[1]	PLATE
1B-8710	[2]	KEY
7F-5151	[1]	SHAFT
7F-5153	[1]	BEARING
7F-5149	[1]	GEAR
7F-5162	[1]	NUT
7F-5161	[1]	LOCKWASHER
7F-5152	[1]	RING
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
7F-5148	[1]	GEAR
5B-1975	[1]	BEARING ASSEM.
5B-1974	[1]	RACE
7F-5141	[1]	PLATE ASSEM.
7F-5138	[1]	DOWEL (.437" DIA.)
7F-5139	[1]	DOWEL (.50" DIA.)
2F-4547	[2]	DOWEL (.25" DIA.)
		(PARTS OF PLATE ASSEM. 7F5141)
1B-2719	[8]	BOLT
3B-4505	[8]	LOCKWASHER
7F-5160	[1]	GASKET

#UE0700740338

3H-3170: MOTOR GP-AIR STARTING

MOTOR GP-AIR STARTING

3H3170 AIR MOTOR
Part of 6L6730 Motor Assembly shown on Pages 72 and 72A

c104613 UE070074

3H3170 MOTOR GP-AIR STARTING Parts scheme

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
2L-6220	[1]	HOUSING
2F-0808	[4]	SCREW
7F-5143	[1]	ROTOR
7L-7465	[5]	VANE
7F-5136	[1]	PLATE ASSEM.
7F-5138	[1]	DOWEL (.43" DIA.)
7F-5139	[1]	DOWEL (50" DIA.)
2F-4547	[4]	PIN (.25" DIA.)
		(PARTS OF PLATE ASSEM. 7F5136)
3H-1660	[1]	RING
4B-4731	[1]	BEARING
7F-9504	[3]	PLUG (D)
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
7F-5421	[2]	SHIM (.002")
7F-5422	[2]	SHIM (.003")
7F-5423	[1]	SHIM (.005")
2B-2695	[4]	BOLT
3B-4505	[4]	LOCKWASHER
2L-6221	[1]	COVER
7F-5156	[1]	GASKET
4B-3388	[8]	BOLT
3B-4505	[8]	LOCKWASHER
7F-5149	[1]	GEAR
7F-6284	[1]	RACE
7F-6283	[1]	BEARING ASSEM.
7F-5157	[1]	GASKET
6L-6705	[1]	COVER
7F-5164	[7]	BOLT
3B-4505	[7]	LOCKWASHER
7F-5158	[1]	PLATE
0S-1614	[3]	BOLT
3B-4504	[3]	LOCKWASHER
7F-5153	[1]	BEARING
1B-8710	[2]	KEY
7F-5151	[1]	SHAFT
7F-5162	[1]	NUT
7F-5161	[1]	LOCKWASHER
7F-5159	[1]	RING
7F-5171	[1]	WASHER
7F-5154	[1]	NUT
7F-5155	[1]	LOCKWASHER
5B-1975	[1]	BEARING ASSEM.
7F-5152	[1]	RING
7F-5148	[1]	GEAR
5B-1974	[1]	RACE
3H-1660	[1]	RING
7F-5160	[1]	GASKET
7F-5141	[1]	PLATE ASSEM.
7F-5138	[1]	DOWEL (.43" DIA.)
7F-5139	[1]	DOWEL (50" DIA.)
2F-4547	[4]	PIN (.25" DIA.)
		(PARTS OF PLATE ASSEM. 7F5141)
1B-2719	[6]	BOLT
3B-4505	[8]	LOCKWASHER
7F-5145	[1]	HOUSING

#UE0700740339

3L-9922: VALVE GP-WHISTLE

VALVE GP-WHISTLE

3L9922 WHISTLE VALVE
Part of 7L6914, 3N967, 3N9568, 7L6916, 3N968, 3N9574, 7L6913, 3N969, 3N9569,
7L6915, 3N970 and 3N9575 Motor Groups shown on Pages 67D through 71K

c59307 UE070074

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Parts for your D399 INDUSTRIAL ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
4L-2803	[1]	LEVER ASSEM.
4L-3054	[1]	GLAND
4L-2804	[1]	PACKING
4L-3055	[1]	STEM
4L-2808	[1]	NUT
4L-2805	[1]	DISC
4L-2807	[1]	HOLDER
4L-2806	[1]	SPRING

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-9575 STARTING MOTOR GP-AIR

3N-0970 STARTING MOTOR GP-AIR

3N-9575 STARTING MOTOR GP-AIR

6L-6731 MOTOR AS-AIR

4N-6019 CHANGEOVER GP

4N-4985 CHANGEOVER GP

3H-3171 LUG

3H-3171 LUG

3H-3170 MOTOR GP-AIR STARTING

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