3L9922 WHISTLE VALVE GROUP Part of 7L6914, 7L6916, 7L6913, 7L6915, 3N969, 3N968, 3N970, 3N9575, 3N9568, 3N9569 and 3N9574 Air Starting Motor Groups G399

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

0. 3L-9922 VALVE GP-W
1. 6F-7691 AIR RECEIV
2. 7L-6912 SILENCER G
3. 7L-6911 VALVE GP-A
4. 3N-9501 VALVE GP-A
5. 5N-2846 VALVE GP-A
6. 3N-9492 SILENCER G
7. 3N-9492 SILENCER G
8. 1L-2073 VALVE GP-P

BASIC ENGINE

DRIVE GP-FAN

9. 7L-7879 RADIATOR A
0. INFORMATION

GAS ENGINE G399 GAS ENGINE 49C
G399 ENGINE 49C00001-00260 UEG0038S G399 49C (1968)

ELECTRICAL AND STARTING SYSTEM

STARTING MOTOR GP

3H-3171 LUG

3H-3170 MOTOR GP-AIR STARTING

3L-9922 VALVE GP-WHISTLE

6F-7691 AIR RECEIVER GP

7L-6912 SILENCER GP-AIR STARTING

7L-6911 VALVE GP-AIR STARTING

#UEG0038S0250

3L-9922: VALVE GP-WHISTLE

VALVE GP-WHISTLE

3L9922 WHISTLE VALVE GROUP
Part of 7L6914, 7L6916, 7L6913, 7L6915, 3N969, 3N968, 3N970, 3N9575,
3N9568, 3N9569 and 3N9574 Air Starting Motor Groups

c59307 UEG0038S

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Parts for your G399 GAS 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

#UEG0038S0251

6F-7691: AIR RECEIVER GP

AIR RECEIVER GP

6F7691 AIR RECEIVER GROUP--28 Cubic Foot Capacity

c58420 UEG0038S

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
6F-7731	[1]	GAUGE
6F-7732	[1]	BUSHING
6F-7701	[1]	TEE
7F-6923	[1]	BUSHING
6F-7699	[1]	BUSHING
6F-7702	[1]	VALVE
7F-6654	[1]	NIPPLE
3L-2877	[1]	DISC
		(PART OF VALVE 1L7805)
6F-7692	[1]	AIR RECEIVER
1L-7805	[1]	VALVE
9B-3523	[1]	BUSHING
6F-6045	[2]	NIPPLE
6F-7694	[1]	COCK

#UEG0038S0252

7L-6912: SILENCER GP-AIR STARTING

SILENCER GP-AIR STARTING

7L6912 AIR SILENCER AND VAPOR ARRESTOR GROUP
FOR USE WITH AIR STARTING MOTOR GROUPS SHOWN ON PAGES
66 THROUGH 73

c104941 UEG0038S

7L6912 SILENCER GP-AIR STARTING Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Qty	Parts name
1.	[1]	SILENCER
2.	[1]	GASKET
3.	[1]	ELBOW
4.	[2]	BOLT (3.25" Long)
5.	[4]	LOCKWASHER
6.	[2]	BOLT (1.25" Long)
7.	[1]	GASKET
8.	[4]	BOLT
9.	[4]	LOCKWASHER
10.	[1]	JAR
11.	[1]	RING

#UEG0038S0253

7L-6911: VALVE GP-AIR STARTING

VALVE GP-AIR STARTING

7L6911 REGULATING AND PRESSURE REDUCING VALVE GROUP--Replaced
by 3N9501
FOR USE WITH AIR STARTING MOTOR GROUPS SHOWN ON PAGES
66 THROUGH 73

c115384 UEG0038S

7L6911 VALVE GP-AIR STARTING Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5B-7661	[1]	NIPPLE
2.	1L-2073 Y	[1]	VALVE
			(See Separate Illustration)
3.	1L-2893	[1]	NIPPLE
			(Used without R.H. Air Motor Groups)
4.	6F-8856	[1]	ELBOW
	Y		SEPARATE ILLUSTRATION

#UEG0038S0254

3N-9501: VALVE GP-AIR STARTING

VALVE GP-AIR STARTING

3N9501 REGULATOR AND PRESSURE REDUCING VALVE GROUP
FOR USE WITH 3N9570, 3N9571, 3N9572, 3N9573, 3N9568, 3N9569, 3N9574 AND
3N9575 AIR STARTING MOTOR GROUPS. 1L2073 Valve parts are shown on Page 79

c156561 UEG0038S

3N9501 VALVE GP-AIR STARTING Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5B-7661	[1]	NIPPLE
2.	1L-2073 Y	[1]	VALVE
			(Separate Illustration)
3.	6L-7349	[1]	NIPPLE
	Y		SEPARATE ILLUSTRATION

#UEG0038S0255

5N-2846: VALVE GP-AIR

VALVE GP-AIR

5N2846 REGULATING AND PRESSURE REDUCING VALVE GROUP--Air Start
FOR USE WITH 3N9568, 3N9569, 3N9570, 3N9571, 3N9572, 3N9573, 3N9574 AND
3N9575. 1L2073 Regulating Valve parts are shown on Page 79

c208878 UEG0038S

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3B-6768	[1]	BUSHING
			(For Use Without Air Prelube)
2.	1L-2073 Y	[1]	VALVE
			(Separate Illustration)
3.	5B-7666	[1]	ELBOW
	Y		SEPARATE ILLUSTRATION

#UEG0038S0256

3N-9492: SILENCER GP-AIR STARTING

SILENCER GP-AIR STARTING

3N9492 AIR STARTING SILENCER GROUP--Type 1
FOR USE WITH 3N9570, 3N9571, 3N9572, 3N9375, 3N9568, 3N9569, 3N9574 AND 3N9575 AIR STARTING MOTOR GROUPS

c156562 UEG0038S

3N9492 SILENCER GP-AIR STARTING Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1H-4725	[1]	SILENCER
2.	0L-0478	[1]	BOLT
	1B-4203	[1]	NUT
	5M-2894	[1]	WASHER
	1H-0767	[1]	SPACER
3.	3B-4506	[7]	LOCKWASHER
4.	5N-2595	[1]	BRACKET
5.	1A-2029	[2]	BOLT
	4B-1040	[8]	WASHER
6.	5N-2596	[1]	BRACKET
7.	0S-1625	[2]	BOLT
	3B-4510	[2]	LOCKWASHER
	8D-1251	[2]	SPACER
8.	3B-7296	[1]	NIPPLE
9.	3B-6500	[1]	ELBOW
10.	3N-9382	[1]	PIPE
11.	0S-1571	[4]	BOLT
12.	3N-9309	[1]	FLANGE
13.	1H-4768	[1]	GASKET
14.	5F-6658	[1]	JAR
15.	7H-2444	[1]	SEAL
16.	2L-3658	[1]	STRAP
	8F-3273	[1]	LINING

#UEG0038S0257

3N-9492: SILENCER GP-AIR STARTING

SILENCER GP-AIR STARTING

3N9492 AIR STARTING SILENCER GROUP--Type 2
FOR USE WITH 3N9570, 3N9571, 3N9572, 3N9573, 3N9568, 3N9569,
3N9574 AND 3N9575 AIR STARTING MOTOR GROUPS

c208871 UEG0038S

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5N-2752 C	[1]	BRACKET
2.	0S-1571 C	[6]	BOLT
3.	1A-2029 C	[4]	BOLT
4.	1D-4717 C	[6]	NUT
5.	3B-4506 C	[10]	LOCKWASHER
6.	5N-2741 C	[1]	BRACKET
7.	8B-8679 C	[2]	SPACER
8.	1H-4725	[1]	SILENCER
9.	5N-2747 C	[2]	BAND ASSEM.
10.	7H-2444	[1]	SEAL
11.	5F-6658	[1]	JAR
12.	1H-4768	[1]	GASKET
13.	3N-9309	[1]	FLANGE
14.	5P-1262 CH		HOSE 12.70 cm(5 in.)
15.	9M-7959 C	[2]	CLAMP
16.	3B-6500 C	[2]	ELBOW
17.	3B-7296 C	[2]	NIPPLE
18.	1B-7182 C	[4]	BOLT
	H		ORDER BY THE CENTIMETRE

#UEG0038S0258

1L-2073: VALVE GP-PRESSURE REDUCING

VALVE GP-PRESSURE REDUCING

1L2073 REGULATING VALVE
Part of 7L6911, 3N9501 and 5N2846 Regulating and Pressure Reducing Valve Groups shown on Pages 78 and 78A

c76029 UEG0038S

1L2073 VALVE GP-PRESSURE REDUCING Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
1L-9048	[1]	NUT
1H-9569	[1]	BUTTON
1L-9080	[6]	BOLT
1L-9079	[6]	NUT
1H-9574	[1]	BUTTON
1H-9575	[1]	CYLINDER
1H-9576	[1]	PISTON ASSEM.
1L-2072	[1]	BODY
1H-9581	[1]	PLUG ASSEM.
1H-9568	[1]	SCREW
	[1]	CHAMBER
1L-9049	[1]	SPRING
1H-9572	[1]	PLATE
1H-9573	[1]	DIAPHRAGM
1H-9577	[1]	SCREEN
1H-9578	[1]	SPRING
5B-7890	[1]	PLUG
1H-9580	[1]	GASKET

#UEG0038S0259

7L-7879: RADIATOR AND FAN DRIVE GROUP

RADIATOR AND FAN DRIVE GROUP

7L7879 RADIATOR AND FAN DRIVE GROUP
S.A.E. Standard Engine Rotation--125 degrees Fahrenheit Ambient Air
7L6776 Fan and Radiator Assembly parts are shown on Page 84

c122665 UEG0038S

7L7879 RADIATOR AND FAN DRIVE GROUP Parts scheme

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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6L-9850	[1]	CAP
2.	5M-4564	[8]	CLAMP
3.	7L-6776 Y	[1]	FAN AND RADIATOR ASSEM.
			(See Separate Illustration)
4.	7L-7882	[1]	VEE BELT SET (6 Belts)
5.	7L-8254	[2]	TUBE (Inlet)
6.	7L-8251	[2]	SPACER
7.	0S-1591	[4]	BOLT
8.	1D-4717	[12]	NUT
9.	3B-4506	[21]	LOCKWASHER
10.	7L-8252	[2]	PLATE
11.	0S-1621	[4]	BOLT
12.	3B-4508	[8]	LOCKWASHER
13.	0S-1588	[13]	BOLT
14.	4L-8128	[2]	GASKET
15.	7L-8257	[2]	FLANGE
16.	6L-3930	[4]	HOSE
17.	7L-8255	[2]	CLAMP
18.	1D-4608	[2]	BOLT
	1B-4331	[2]	NUT
	3B-4512	[2]	LOCKWASHER
	4B-4283	[4]	WASHER
19.	7B-3235	[4]	BOLT
	4B-4280	[8]	WASHER
20.	7L-6796	[1]	PULLEY
21.	7L-8801	[2]	HOSE
22.	6L-9891	[4]	CLAMP
23.	7L-8253	[1]	TUBE (Outlet)
24.	7L-6802	[1]	COUPLING ASSEM.
25.	5S-2552	[1]	SEAL
26.	1J-2150	[1]	SEAL
27.	3D-4603	[2]	PLUG
			(Parts of 7L6802 Coupling Assem.)
28.	7L-6798	[1]	SHAFT
	0L-0850	[1]	KEY
29.	7L-6799	[1]	BRACKET
30.	7L-6731	[1]	PILLOW BLOCK ASSEM.
	8L-8520	[1]	COLLAR
			(Part of 7L6731 Pillow Block Assem.)
31.	0S-1594	[4]	BOLT
	4B-4278	[4]	WASHER
32.	7L-8256	[1]	CLAMP
33.	7L-5054	[1]	BRACKET
	Y		SEPARATE ILLUSTRATION