3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1--TYPE 1*R Serial No. 67B1391 To 67B2339 Inclusive. See Page 29 For Gasket Kit D398A

3N-2681: MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1--TYPE 1*R
Serial No. 67B1391 To 67B2339 Inclusive. See Page 29 For Gasket Kit

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
9F-8254	[24]	SOCKET
		(1 IN EACH ARM ASSEM. 4L3855 & 4H9811)
7B-2420	[36]	FERRULE
6L-7814	[36]	SEAL
3B-0645	[48]	PLUG
		(8 IN EACH HEAD ASSEM. 7L138)
0S-1608 C	[2]	BOLT
8M-8509	[1]	LOCK
3N-1598	[1]	ELBOW ASSEM.
5M-4987	[2]	DOWEL
		(Part of 3N1598 Assem.)
2N-3553	[7]	SEAL
1B-4204	[24]	NUT
1A-0744	[24]	SCREW
2N-3598	[6]	COVER
0L-1351	[12]	BOLT
3B-4506	[12]	LOCKWASHER
3F-7445	[24]	BUSHING
		(1 IN EACH ARM ASSEM. 4L3855 & 4H9811)
4L-3855	[12]	ARM ASSEM. (INTAKE)
4H-9811	[12]	ARM ASSEM. (EXHAUST)
6H-3217	[6]	SHAFT ASSEM.
3B-4621	[12]	COTTER PIN
4F-4585	[12]	PLUG
		(2 IN EACH SHAFT ASSEM. 6H3217)
4H-6716	[36]	WASHER
1B-9917	[12]	SPRING (SHORT)
6F-5034	[6]	SPRING (LONG)
4L-8188	[12]	STUD
8S-9089	[24]	BOLT
3F-4550	[12]	LOCK
2N-3227	[6]	BRACKET
C		INDICATES CHANGE

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 2--TYPE 1*R
Serial No. 67B1391 To 67B2339 Inclusive
Refer Also To Pages 70 and 71 For Special Parts

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Part No	Qty	Parts name
8F-4994	[12]	SEAL
3F-9780	[12]	WASHER
8H-7097	[12]	VALVE (Exhaust)
7M-7817	[12]	VALVE (Intake)
3H-5867 C	[12]	RETAINER (Intake)
8F-9206	[12]	SEAL
1P-8372	[12]	GASKET KIT
7S-6366	[12]	BUSHING (Exhaust)
7S-6322	[12]	BUSHING (Intake)
		(2 each in 7L138 Head Assem.)
7S-5787	[12]	CHAMBER ASSEM.
4L-7820	[24]	ROD ASSEM.
5L-5486	[24]	LIFTER ASSEM.
6L-7816	[12]	SEAL
1B-4205	[24]	NUT
8F-8858	[24]	BUTTON
4L-3803	[12]	BRACKET
9F-7707	[24]	RING
9M-5350	[24]	SPRING (OUTER)
3B-1142 C	[12]	RETAINER (Exhaust)
8F-9206 C	[12]	SEAL
2N-3597 C	[6]	SEAL
3B-1143	[72]	LOCK
8M-5251	[24]	SEAL
9M-5349	[24]	SPRING (Inner)
4S-7468	[24]	ROTOCOIL
1F-3278	[6]	FITTING
4H-0945	[6]	FITTING
4H-2495	[6]	NUT
4H-2494	[6]	SLEEVE
		(1 OF EACH IN EACH FITTING 4H945)
7L-0138 R	[6]	HEAD ASSEM.
1F-1344	[6]	NUT
		(1 IN EACH FITTING 1F3278)
4L-7892	[6]	TUBE (8.09"LONG)
5H-7071	[48]	DIRECTOR
		(8 IN EACH HEAD ASSEM. 7L138)
6L-7813	[48]	SEAL
6B-6224	[48]	FERRULE
3N-3220	[6]	GASKET (METAL)
6L-4497	[6]	GASKET (PLAIN)
5B-2383	[12]	NUT
4L-8189	[12]	STUD
6B-6682	[96]	NUT
5H-1504	[96]	WASHER
8M-4014	[12]	INSERT (EXHAUST)
4S-8906 H	[12]	INSERT (.005" OVERSIZE)
4S-8907 H	[12]	INSERT (.010" OVERSIZE)
5S-1757	[12]	INSERT (INTAKE)
4S-8908 H	[12]	INSERT (.005" OVERSIZE)
4S-8909 H	[12]	INSERT (.010" OVERSIZE)
		(2 OF EACH IN EACH HEAD ASSEM. 7L138)
C		INDICATES CHANGE
R		REMFG PART MAY BE AVAILABLE
H		NOT PART OF 7L138 HEAD ASSEM.

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1--TYPE 2*R
Serial No. 67B1391 To 67B2339 Inclusive. See Page 29 For Gasket Kit

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-6716	[36]	WASHER
	1B-9917	[12]	SPRING (Short)
	6F-5034	[6]	SPRING (Long)
2.	3B-4621	[12]	COTTER PIN
3.	0L-1351	[12]	BOLT
	3B-4506	[12]	LOCKWASHER
4.	6H-3217	[6]	SHAFT ASSEM.
5.	4F-4585	[2]	PLUG
6.	0S-1608	[2]	BOLT
7.	8M-8509	[1]	LOCK
8.	2N-3553	[7]	SEAL
9.	8S-9089	[24]	BOLT
	3F-4550	[12]	LOCK
10.	1B-4204	[24]	NUT
11.	1A-0744	[24]	SCREW
12.	2N-3227	[6]	BRACKET
13.	5L-5486	[24]	LIFTER ASSEM.
14.	3N-1598	[1]	ELBOW ASSEM.
15.	5M-4987	[2]	DOWEL
16.	4L-7820	[24]	ROD ASSEM.
17.	1P-8372	[12]	GASKET KIT
18.	7B-2420	[36]	FERRULE
	6L-7814	[36]	SEAL
19.	7S-5787	[12]	CHAMBER ASSEM.
20.	6L-7816	[12]	SEAL
21.	2N-3598	[6]	COVER
22.	4H-9811	[12]	ARM ASSEM. (Exhaust)
23.	9F-8254	[1]	SOCKET
24.	3F-7445	[1]	BUSHING
25.	4L-3855	[12]	ARM ASSEM. (Intake)
26.	9F-8254	[1]	SOCKET
27.	3F-7445	[1]	BUSHING

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 2--TYPE 2*R
Serial No. 67B1391 To 67B2339 Inclusive
Refer Also To Pages 70 and 71 For Special Parts

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-0945	[6]	FITTING
	4H-2495	[1]	NUT
	4H-2494	[1]	SLEEVE
2.	2N-3597	[6]	SEAL
3.	4L-3803	[12]	BRACKET
4.	4L-8188	[12]	STUD
5.	1B-4205	[24]	NUT
6.	1F-3278	[6]	FITTING
	1F-1344	[1]	NUT
7.	4L-7892	[6]	TUBE
8.	6B-6682	[96]	NUT
	5H-1504	[96]	WASHER
9.	7L-0138 R	[6]	HEAD ASSEM.
10.	8M-4014	[2]	INSERT (Exhaust)
	4S-8906 H	[2]	INSERT (.005" Oversize)
	4S-8907 H	[2]	INSERT (.010" Oversize)
	5S-1757	[2]	INSERT (Intake)
	4S-8908 H	[2]	INSERT (.005" Oversize)
	4S-8909 H	[2]	INSERT (.010" Oversize)
11.	5H-7071	[8]	DIRECTOR
12.	3B-0645	[8]	PLUG
13.	8N-3723 C	[12]	VALVE (Exhaust)
	7M-7817	[12]	VALVE (Intake)
14.	3F-9780	[12]	WASHER
15.	3N-3220	[6]	GASKET (Copper)
	6L-4497	[6]	GASKET (Plain)
16.	7N-7639 C	[24]	ROTATOR
17.	9M-5350	[24]	SPRING (Outer)
	9M-5349	[24]	SPRING (Inner)
18.	3B-1143	[72]	LOCK
19.	9F-7707	[24]	RING
20.	8F-8858	[24]	BUTTON
21.	3B-1142	[12]	RETAINER (Exhaust)
	3H-5867	[12]	RETAINER (Intake)
22.	8F-9206	[24]	SEAL
23.	6L-7813	[48]	SEAL
24.	6B-6224	[48]	FERRULE
25.	8F-4994	[12]	SEAL
26.	4L-8189	[12]	STUD
	5B-2383	[12]	NUT
	C		INDICATES CHANGE
	R		REMFG PART MAY BE AVAILABLE
	H		NOT PART OF 7L138 ASSEM.

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1*R
Serial No. 67B2340 To 67B2397 Inclusive. See Page 29 For Gasket Kit

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-6716	[36]	WASHER
	1B-9917	[12]	SPRING (Short)
	6F-5034	[6]	SPRING (Long)
2.	3B-4621	[12]	COTTER PIN
3.	0L-1351	[12]	BOLT
	3B-4506	[12]	LOCKWASHER
4.	6H-3217	[6]	SHAFT ASSEM.
5.	4F-4585	[2]	PLUG
6.	0S-1608	[2]	BOLT
7.	8M-8509	[1]	LOCK
8.	2N-3553	[7]	SEAL
9.	8S-9089	[24]	BOLT
	3F-4550	[12]	LOCK
10.	1B-4204	[24]	NUT
11.	1A-0744	[24]	SCREW
12.	2N-3227	[6]	BRACKET
13.	5L-5486	[24]	LIFTER ASSEM.
14.	3N-1598	[1]	ELBOW ASSEM.
15.	5M-4987	[2]	DOWEL
16.	4L-7820	[24]	ROD ASSEM.
17.	1P-8372	[12]	GASKET KIT
18.	7B-2420	[36]	FERRULE
	6L-7814	[36]	SEAL
19.	7S-5787	[12]	CHAMBER ASSEM.
20.	6L-7816	[12]	SEAL
21.	2N-3598	[6]	COVER
22.	4H-9811	[12]	ARM ASSEM. (Exhaust)
23.	9F-8254	[1]	SOCKET
24.	3F-7445	[1]	BUSHING
25.	4L-3855	[12]	ARM ASSEM. (Intake)
26.	9F-8254	[1]	SOCKET
27.	3F-7445	[1]	BUSHING

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 2*R
Serial No. 67B2340 To 67B2397 Inclusive. 5N8320--Page 25F
Refer Also To Pages 70 And 71 For Special Parts

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-0945	[6]	FITTING
	4H-2495	[1]	NUT
	4H-2494	[1]	SLEEVE
2.	2N-3597	[6]	SEAL
3.	4L-3803	[12]	BRACKET
4.	4L-8188	[12]	STUD
5.	1B-4205	[24]	NUT
6.	1F-3278	[6]	FITTING
	1F-1344	[1]	NUT
7.	4L-7892	[6]	TUBE
8.	6B-6682	[96]	NUT
	5H-1504	[96]	WASHER
9.	5N-8320 CY	[6]	HEAD GROUP
			(Separate Illustration)
10.	3N-3220	[6]	GASKET (copper)
	6L-4497	[6]	GASKET (plain)
11.	9F-7707	[24]	RING
12.	8F-8858	[24]	BUTTON
13.	6L-7813	[48]	SEAL
14.	6B-6224	[48]	FERRULE
15.	8F-4994	[12]	SEAL
16.	3F-9780	[12]	WASHER
17.	4L-8189	[12]	STUD
	5B-2383	[12]	NUT
	C		INDICATES CHANGE

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1 OF 2*R
Serial No. 67B2398-Up

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-6716	[36]	WASHER
	1B-9917	[12]	SPRING (Short)
	6F-5034	[6]	SPRING (Long)
2.	3B-4621	[12]	COTTER PIN
3.	0L-1351	[12]	BOLT
	3B-4506	[12]	LOCKWASHER
4.	6H-3217	[6]	SHAFT ASSEM.
5.	4F-4585	[2]	PLUG
6.	0S-1608	[2]	BOLT
7.	8M-8509	[1]	LOCK
8.	2N-3553	[7]	SEAL
9.	8S-9089	[24]	BOLT
	3F-4550	[12]	LOCK
10.	1B-4204	[24]	NUT
11.	1A-0744	[24]	SCREW
12.	2N-3227	[6]	BRACKET
13.	5L-5486	[24]	LIFTER ASSEM.
14.	3N-1598	[1]	ELBOW ASSEM.
15.	5M-4987	[2]	DOWEL
16.	4L-7820	[24]	ROD ASSEM.
17.	1P-8372	[12]	GASKET KIT
18.	7B-2420	[36]	FERRULE
	6L-7814	[36]	SEAL
19.	7S-5787	[12]	CHAMBER ASSEM.
20.	6L-7816	[12]	SEAL
21.	2N-3598	[6]	COVER
22.	4H-9811	[12]	ARM ASSEM. (Exhaust)
23.	9F-8254	[1]	SOCKET
24.	3F-7445	[1]	BUSHING
25.	4L-3855	[12]	ARM ASSEM. (Intake)
26.	9F-8254	[1]	SOCKET
27.	3F-7445	[1]	BUSHING

3N-2681: MECHANISM GP-CYL HEAD & VALVE

MECHANISM GP-CYL HEAD & VALVE

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP-PART 2 OF 2*R
Serial No. 67B2398-Up
5N8882 Cylinder Head Parts Are Shown On Page 25E.02
Refer Also To Pages 70 And 71 For Special Parts

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4H-0945	[6]	FITTING
	4H-2495	[1]	NUT
	4H-2494	[1]	SLEEVE
2.	2N-3597 C	[6]	SEAL
3.	4L-3803	[12]	BRACKET
4.	4L-8188	[12]	STUD
5.	1B-4205	[24]	NUT
6.	1F-3278	[6]	FITTING
	1F-1344	[1]	NUT
7.	4L-7892	[6]	TUBE
8.	1D-4623 C	[96]	BOLT
	5H-1504	[96]	WASHER
9.	5N-8882 YC	[6]	HEAD GROUP
			(Separate Illustration)
10.	3N-3220	[6]	GASKET (copper)
	6L-4497	[6]	GASKET (plain)
11.	9F-7707	[24]	RING
12.	8F-8858	[24]	BUTTON
13.	6L-7813	[48]	SEAL
14.	6B-6224	[48]	FERRULE
15.	8F-4994	[12]	SEAL
16.	3F-9780	[12]	WASHER
17.	4L-8189	[12]	STUD
	5B-2383	[12]	NUT
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

5N-8882: CYLINDER HEAD GP

CYLINDER HEAD GP

5N8882 CYLINDER HEAD GROUP
Serial No. 67B2398-Up
Part Of 3N2681 Cylinder Head And Valve Mechanism

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3N-1414	[4]	SPACER
2.	7N-7639	[4]	ROTATOR-VALVE
3.	2A-4429	[8]	LOCK-RETAINER
4.	2N-9297	[2]	RETAINER-VALVE SPRING (EXHAUST)
5.	9M-5350	[4]	SPRING (OUTER)
6.	9M-5349	[4]	SPRING (INNER)
7.	5N-8319 R	[1]	CYLINDER HEAD AS
8.	2N-9299	[2]	GUIDE-VALVE (EXHAUST)
	2N-9298	[2]	GUIDE-VALVE (INTAKE)
9.	8M-4014	[2]	INSERT-SEAT EXHAUST
	5S-1757	[2]	INSERT (INTAKE)
10.	5H-7071	[8]	DIRECTOR-WATER
11.	3B-0645	[8]	PLUG-CUP
12.	1W-1822	[2]	VALVE-EXHAUST
	1W-8606	[2]	VALVE-INLET (INTAKE)
13.	1W-3062	[2]	RETAINER AS (INTAKE)
			(EACH INCLUDES)
	8N-7780	[1]	SHIELD-OIL
	R		REMFG PART MAY BE AVAILABLE

5N-8320: CYLINDER HEAD GP

CYLINDER HEAD GP

5N8320 CYLINDER HEAD GROUP
Serial No. 67B2340 To 67B2397 Inclusive
Part Of 3N2681 Cylinder Head And Valve Mechanism

Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3N-1414	[4]	SPACER
2.	7N-7639	[4]	ROTATOR-VALVE
3.	2A-4429 FY	[8]	LOCK-RETAINER
4.	2N-9297	[2]	RETAINER-VALVE SPRING (EXHAUST)
5.	9M-5350	[4]	SPRING
6.	9M-5349	[4]	SPRING
7.	5N-8319 C	[1]	CYLINDER HEAD AS
8.	2N-9299	[2]	GUIDE-VALVE (EXHAUST)
	2N-9298	[2]	GUIDE-VALVE (INTAKE)
9.	8M-4014 R	[2]	INSERT-SEAT EXHAUST (EXHAUST)
	5S-1757	[2]	INSERT (INTAKE)
10.	5H-7071	[8]	DIRECTOR-WATER
11.	3B-0645	[8]	PLUG-CUP
12.	1W-1822	[2]	VALVE-EXHAUST (EXHAUST)
	1W-8606	[2]	VALVE-INLET (INTAKE)
13.	1W-3062	[2]	RETAINER AS (INTAKE)
			(EACH INCLUDES)
	8N-7780 C	[1]	SHIELD-OIL
	C		CHANGE FROM PREVIOUS TYPE
	F		NOT SHOWN
	R		REMFG PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION

Information:

BASIC ENGINE

CYLINDER HEAD GP

Engine News

New Exhaust Valve And Valve Guide
1979/03/07

New Exhaust Valve Has Improved Three-Piece Construction
1979/04/25

Too Much Clearance For Exhaust Valves Can Cause Wear To The Camshaft Lobes And Valve Lifters
1980/01/09

New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear
1981/04/01

Bolts Now Used Instead Of Studs To Hold Cylinder Heads
1982/05/12

Use Caution During Replacement Of Damaged Nozzle Adapters Or Precombustion Chambers
1983/01/19

Engine Valve Stem "Use Again" Specifications
1983/03/16

Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures
1983/10/26

A New Book "Analyzing Diesel And Natural Gas Engine Valve Failures" Is Available
1985/03/01

Determining The Cause Of Glow Plug Tip Failures
1986/06/01

Valve Lash Adjustment Interval Is Changed
1986/07/01

New Camshaft And Lifter Kits Available For Slipper Type Cam Followers (Valve Lifters)
1989/12/01

New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads
1990/10/01

Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}
1994/09/01

Exhaust Valve Guides With A Counterbore Are Now Available
1977/01/28

Correct Installation Of Valve Lifters On The Camshaft Is Very Important To Prevent Failures
1977/05/25

Tolerance Added To Valve Clearance Specifications
1978/01/18

Use Again Specifications For Valve Springs Are Changed
1978/03/01

Caterpillar Warranty Claims on Cylinder Head Valves {1105}
2005/10/03

Special Instruction

Use Of The 1P7451 Valve Guide Honing Group{0673, 1104}
Use Of The 1P7451 Valve Guide Honing Group{0673, 1104}

Installing Heli-Coil Inserts In Caterpillar Cylinder Heads{1117}
Installing Heli-Coil Inserts In Caterpillar Cylinder Heads{1117}

Use Of 6V4805 Valve Seat Insert Puller Group{0703}
Use Of 6V4805 Valve Seat Insert Puller Group{0703}

Repair Of Precombustion Chamber And Direct Injection Adapter Seating Surfaces{1101}
Repair Of Precombustion Chamber And Direct Injection Adapter Seating Surfaces{1101}

Use Of 6V9050 Exhaust Stud Removal Group{1100}
Use Of 6V9050 Exhaust Stud Removal Group{1100}

Determining the Cause of Fuel Dilution of Engine Oil {1101, 1124, 1251, 1280, 1290}
Determining the Cause of Fuel Dilution of Engine Oil {1101, 1124, 1251, 1280, 1290}

Service Letter-NACD

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-Australia

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-CFEL

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-CSARL

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-Americas

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-Truck/Ag/Marine

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

Specifications

Cylinder Head
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Valves
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Tool Operating Manual

{0374, 0599, 0629, 0632, 0700, 0701, 1100, 1101}
{0374, 0599, 0629, 0632, 0700, 0701, 1100, 1101}

Service Letter-China

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Service Letter-Asia

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Reuse And Salvage Guidelines

Engine Valve Failure Modes{1100, 1105}
Engine Valve Failure Modes{1100, 1105}

Using the 9U-5383 Vacuum Tester {0774, 0781, 1000, 1100}
Using the 9U-5383 Vacuum Tester {0774, 0781, 1000, 1100}

Applied Failure Analysis

Engine Valve Failure Modes{1100, 1105}
Engine Valve Failure Modes{1100, 1105}

Information Release Memo

APPEARANCE CHANGE ON REMAN SHORT BLOCKS
APPEARANCE CHANGE ON REMAN SHORT BLOCKS

Service Letter-APD

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING 0R2669 AND 0R2670 REMAN CYLINDER HEADS FROM DEALER PARTS STOCK

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN 0R-2669 AND 0R-2670 CYLINDER HEADS FROM DEALER PARTS STOCK

0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock
0R0828, 0R2171, 0R2172, 0R2578, 0R2588, 0R2593, 0R2669, And 0R2670 Remanufactured Cylinder Heads May Need To Be Removed From Dealer Parts Stock

Disassembly and Assembly

Precombustion Chambers
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Cylinder Heads
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Valves
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Valve Guides
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Valve Seat Inserts
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Water Directors
D379, D398, D399 INDUSTRIAL & MARINE ENGINES

Service Magazine

New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear{1104,1105,1101,1103,1108,1109}
1981/03/16

New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear{1104,1105,1101,1103,1108,1109}
1981/06/29

Bolts Now Used Instead Of Studs To Hold Cylinder Heads{1101,1201}
1982/05/10

Vacuum Tester Checks For Leaks Between Valve Face and Seat{0651,1103,1105}
1982/09/06

New 6V7059 Micrometer Measures Liner Top Flange And Valve Lip {0653,1216,1105}
1982/11/29

Engine Valve Stem "Use Again" Specifications{0653,1105}
1983/02/28

Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}
1983/10/17

Valve Lash Adjustment Not A Warranty Item {1102,1105}
1985/01/14

Determining The Cause Of Glow Plug Tip Failures{1053,1105,1412}
1986/06/02

Valve Lash Adjustment Interval Is Changed {1105}
1986/07/07

New Water Temperature Regulator Has A Closer Fit At The Valve Seat To Keep Leakage At A Minimum{1355}
1977/01/17

Exhaust Valve Guides With A Counterbore Are Now Available{1104}
1977/01/24

Correct Installation Of Valve Lifters On The Camshaft Is Very Important To Prevent Failures{1209}
1977/05/16

Tools Now Available To Ream And/Or Hone 0.500" (12.70 mm) Diameter Valve Guides{0663}
1977/08/22

Tolerance Added To Valve Clearance Specifications{1105,0374}
1978/01/16

Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}
1978/01/30

Use Again Specifications For Valve Springs Are Changed{1108}
1978/03/06

New Exhaust Valve And Valve Guide{1104,1105}
1979/02/19

New Exhaust Valve Has Improved Three-Piece Construction{1105}
1979/04/09

A New Method To Clean And Polish Engine Valve Stems{0674,1105}
1979/05/28

Why Engines Are Damaged By Fuel Sulfur{1104,1216,1280,1318,1215}
1979/08/27

Fuel Sulfur-Your Diesel's Silent Enemy{0375,1280}
1979/12/17

Too Much Clearance For Exhaust Valves Can Cause Wear To The Camshaft Lobes And Valve Lifters{1105,1210,1209}
1979/12/24

New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads{1105,1101}
1990/10/08

3N2681 CYLINDER HEAD AND VALVE MECHANISM GROUP--PART 1--TYPE 1*R Serial No. 67B1391 To 67B2339 Inclusive. See Page 29 For Gasket Kit D398A

BASIC ENGINE

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

3N-2681: MECHANISM GP-CYL HEAD & VALVE

Parts for your D398A MARINE ENGINE:

5N-8882: CYLINDER HEAD GP

Parts for your D398A MARINE ENGINE:

5N-8320: CYLINDER HEAD GP

Parts for your D398A MARINE ENGINE:

Information:

Caterpillar Parts SIS Catalog D398A :

Truck sale: