122-8851 CYLINDER HEAD AS S/N 4KC567-UP PART OF 123-6072 CYLINDER HEAD AS, 123-8650 CYLINDER HEAD GP FIELD REPLACEMENT ORDER 123-6072 CYLINDER HEAD AS ALSO FIELD INSTALLATION G3512

BASIC ENGINE

CYLINDER HEAD GP

0. 122-8851 CYLINDER H
1. 123-6072 CYLINDER H
2. 4P-6571 CYLINDER H
3. 4P-8300 CYLINDER H
4. 7C-3470 CYLINDER H
5. 7C-3471 CYLINDER H
6. 7W-9486 CYLINDER H
7. 123-8649 CYLINDER H
8. 123-8650 CYLINDER H
9. 4P-6569 CYLINDER H
0. INFORMATION

GAS ENGINE G3512 GAS ENGINE 4KC
G3512 ENGINE 4KC00001-UP SEBP1510 G3512 4KC (1985)

BASIC ENGINE

CYLINDER HEAD GP

122-8851 CYLINDER HEAD AS

123-6072 CYLINDER HEAD AS

4P-6571 CYLINDER HEAD AS

4P-8300 CYLINDER HEAD AS

#SEBP15100060

122-8851: CYLINDER HEAD AS

CYLINDER HEAD AS

122-8851 CYLINDER HEAD AS
S/N 4KC567-UP
PART OF 123-6072 CYLINDER HEAD AS, 123-8650 CYLINDER HEAD GP
FIELD REPLACEMENT ORDER 123-6072 CYLINDER HEAD AS
ALSO FIELD INSTALLATION

i00512878 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9Y-6883	[2]	GUIDE-VALVE
2.	4P-6571 Y	[1]	CYLINDER HEAD AS
3.	9Y-6882	[2]	GUIDE-VALVE
	Y		SEPARATE ILLUSTRATION

#SEBP15100061

123-6072: CYLINDER HEAD AS

CYLINDER HEAD AS

123-6072 CYLINDER HEAD AS
S/N 4KC567-572
FIELD REPLACEMENT FOR 122-8851 CYLINDER HEAD AS
FIELD INSTALLATION

i00514824 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	122-8851 Y	[1]	CYLINDER HEAD AS
2.	7N-1902	[2]	DOWEL
	Y		SEPARATE ILLUSTRATION

#SEBP15100062

4P-6571: CYLINDER HEAD AS

CYLINDER HEAD AS

4P-6571 CYLINDER HEAD AS
S/N 4KC312-UP
PART OF 122-8851, 4P-8300 CYLINDER HEAD AS, 4P-6570 CYLINDER HEAD GP
FIELD REPLACEMENT ORDER @@@@@ 4P-8300@@@@@

i00384609 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3B-0623	[5]	PLUG-CUP
2.	9S-8002	[2]	PLUG (7/16-20-THD)
3.	3J-7354	[2]	SEAL-O-RING
4.	3B-0645	[5]	PLUG-CUP
5.	6I-1713	[4]	INSERT-VALVE SEAT
6.	4P-6925	[1]	SLEEVE-OIL

#SEBP15100063

4P-8300: CYLINDER HEAD AS

CYLINDER HEAD AS

4P-8300 CYLINDER HEAD AS
S/N 4KC312-566
FIELD REPLACEMENT FOR @@@@@ 4P-6571@@@@@, 4P-6572 CYLINDER HEAD

i00371422 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4P-6571 Y	[1]	CYLINDER HEAD AS
2.	9Y-1846	[2]	GUIDE-VALVE (EXHAUST)
3.	7N-1902	[2]	DOWEL
4.	9Y-1847	[2]	GUIDE-VALVE (INTAKE)
	Y		SEPARATE ILLUSTRATION

#SEBP15100064

7C-3470: CYLINDER HEAD AS

CYLINDER HEAD AS

7C-3470 CYLINDER HEAD AS
S/N 4KC93-311
FIELD REPLACEMENT FOR 7C-3471 CYLINDER HEAD AS
FIELD INSTALLATION

i00405072 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9Y-1847	[2]	GUIDE-VALVE (INTAKE)
2.	7N-1902	[2]	DOWEL
3.	9Y-1846	[2]	GUIDE-VALVE (EXHAUST)(EXHAUST)
4.	7C-3471 Y	[1]	CYLINDER HEAD AS
	Y		SEPARATE ILLUSTRATION

#SEBP15100065

7C-3471: CYLINDER HEAD AS

CYLINDER HEAD AS

7C-3471 CYLINDER HEAD AS
S/N 4KC93-UP
PART OF 7C-3470 CYLINDER HEAD AS, 7C-3218 CYLINDER HEAD GP
FIELD REPLACEMENT ORDER @@@@@ 7C-3470@@@@@

i00405076 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3B-0623 C	[5]	PLUG-CUP
2.	9S-8002	[2]	PLUG (7/16-20-THD)
3.	3J-7354	[2]	SEAL-O-RING
4.	3B-0645	[5]	PLUG-CUP
5.	7W-0028	[4]	INSERT-VALVE SEAT
	C		CHANGE FROM PREVIOUS TYPE

#SEBP15100066

7W-9486: CYLINDER HEAD AS

CYLINDER HEAD AS

7W-9486 CYLINDER HEAD AS
S/N 4KC1-92
FIELD INSTALLATION

i00418880 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3B-0623	[7]	PLUG-CUP
2.	9S-8002	[2]	PLUG (7/16-20-THD)
3.	3J-7354	[2]	SEAL-O-RING
4.	3B-0645	[5]	PLUG-CUP
5.	7W-0028	[4]	INSERT-VALVE SEAT
6.	7N-1819	[2]	GUIDE-VALVE
7.	7N-1902	[2]	DOWEL
8.	7W-9487	[2]	GUIDE-VALVE

#SEBP15100067

123-8649: CYLINDER HEAD GP

CYLINDER HEAD GP

123-8649 CYLINDER HEAD GP
S/N 4KC567-UP

i00515594 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5B-7890	[1]	PLUG-PIPE
2.	131-0420	[6]	FASTENER GP-CYLINDER HEAD
			(EACH INCLUDES)
	5P-8248	[1]	WASHER-HARD (20X36.5X3.5-MM THK)
	7N-1961	[1]	BOLT-12 POINT HEAD (3/4-16X8.5-IN)
3.	131-0421	[2]	FASTENER GP-CYLINDER HEAD
			(EACH INCLUDES)
	5P-8248	[1]	WASHER-HARD (20X36.5X3.5-MM THK)
	7N-1961	[1]	BOLT-12 POINT HEAD (3/4-16X8.5-IN)
	9Y-0635	[1]	SPACER (19.35X30.18X45-MM THK)
4.	5B-0213	[2]	BOLT (3/8-16X2.375-IN)
5.	110-6991	[1]	GASKET-CYLINDER HEAD
6.	5M-2894	[2]	WASHER-HARD (10.2X18.5X2.5-MM THK)
7.	123-8650 Y	[1]	CYLINDER HEAD GP
8.	126-1112	[4]	SEAL
9.	126-1113	[4]	SEAL
	R		REMANUFACTURED PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION

#SEBP15100068

123-8650: CYLINDER HEAD GP

CYLINDER HEAD GP

123-8650 CYLINDER HEAD GP
S/N 4KC567-UP
PART OF 123-8649 CYLINDER HEAD GP

i00515602 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	122-8851 Y	[1]	CYLINDER HEAD AS
2.	7N-1903	[4]	SPRING-VALVE INNER
3.	2W-2662	[4]	SEAT-SPRING
4.	7N-1904	[4]	SPRING-VALVE OUTER
5.	133-3814	[4]	ROTOCOIL AS
6.	2A-4429	[8]	LOCK-RETAINER
7.	104-7184	[4]	VALVE
8.	7N-1902	[2]	DOWEL
	Y		SEPARATE ILLUSTRATION

#SEBP15100069

4P-6569: CYLINDER HEAD GP

CYLINDER HEAD GP

4P-6569 CYLINDER HEAD GP
S/N 4KC312-476

i00384602 SEBP1510

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Parts for your G3512 GAS ENGINE:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5B-7890	[1]	PLUG-PIPE
2.	7N-1961	[8]	BOLT-12 POINT HEAD (3/4-16X8.5-IN)
3.	5P-8248	[8]	WASHER-HARD (20X36.5X3.5-MM THK)
4.	0L-2070	[2]	BOLT (3/8-16X2.25-IN)
5.	101-1188	[1]	GASKET-CYLINDER HEAD
6.	5M-2894	[2]	WASHER-HARD (10.2X18.5X2.5-MM THK)
7.	4P-6570 Y	[1]	CYLINDER HEAD GP
8.	6I-1357	[4]	SEAL
9.	6I-1356	[4]	SEAL
10.	9Y-0635	[2]	SPACER (19.35X30.18X45-MM THK)
	R		REMANUFACTURED PART MAY BE AVAILABLE
	Y		SEPARATE ILLUSTRATION

Information:

BASIC ENGINE

CYLINDER HEAD GP

Engine News

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

Stronger Push Rod Used
1985/08/01

Checking Or Adjusting Valve Clearances
1986/01/01

Adjust Bridge Whenever Valve Clearance Adjustments Are Made
1986/04/01

Beaded Cylinder Head Gasket Provides A Better Seal For Camshaft Compartment
1986/06/01

Valve Lash Adjustment Interval Is Changed
1986/07/01

Check Oil Drain Hole In 0R2671 or 0R2621 Remanufactured Cylinder Heads If Head Used With Breather
1986/11/01

Improvements To Prevent Oil Leakage At Cylinder Heads
1987/12/01

Silicone Water Seals Reinstated In Cylinder Heads
1988/08/01

New Rocker Arm Shaft Assembly and Bolts Used
1988/09/01

Improved Valve Lifter Assemblies; Better Insert Retention
1989/02/01

New Extension Assembly Used In Gas Engine Ignition Groups
1989/06/01

Valve Lifters Can Be Removed Without Removing Cylinder Heads
1990/07/01

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

Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability
1990/11/01

Be Sure To Check Inlet Valve Rotocoils After An Engine Overspeed{1109,1105}
1991/03/01

New Rotocoil Used In Cylinder Head Group; New Valve Stem Oil Shield Used In Locomotive Engine Cylinder Head Group{1109,1100}
1991/03/01

Taller Water Seals Used In Cylinder Head Groups
1992/08/01

New Spacer Plate Gasket Provides Improved Sealing Around Push Rod Compartment
1992/11/01

New Cylinder Head Bolt Tightening Procedure
1992/12/01

Modifying Former 2W8888 Rocker Arm Shaft For Use With New 8T7581 Rocker Arm Shaft Bolt
1992/12/01

New Water Seals Used In Cylinder Head Groups; New Water Seal Assemblies And O-Ring Seals Used In Insert Kit
1993/02/01

Valve Seat Insert Removal Tools
1993/02/01

New Cylinder Head Assembly Provides Improved Valve Seat Retention
1993/06/01

Use Molycoat Paste Lubricant On Cylinder Head Bolts
1993/07/01

New Cylinder Head Gasket Used
1993/09/01

New Inlet/Exhaust Valve Has A Chrome Stem
1993/12/01

Oversize Valve Guides And Valve Seats Available{1103,1104}
1994/02/01

New 9U-7511 Spark Plug Seat Cleaner And 9U-7516 Spark Plug Gauge Available{1555,1100}
1994/05/01

New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}
1994/09/01

New Three Piece Water Line Assembly Used Between Cylinder Head And Exhaust Manifold{1380}
1994/11/01

Additional Groove On Valve Stem Helps Identify 20° Valves {1105}
1995/04/01

New Gasket Kits Available{1052,1059,1063,1100,1150,1201,1216,1304,1361,1378,1380}
1996/04/15

Spark Plug Seat Cleaner Recommended For Use On Cylinder Heads{1555}
1997/10/10

Improved Water Seal Reduces The Possibility Of Cylinder Head Joint Water Leaks {1100}
1998/01/20

New Debris Shield Is Added To Cylinder Head Gasket Kits{1124}
1998/04/01

Use The Correct Procedure For Installation Of Cylinder Head Bolts {1100,7553}
1998/07/01

New Valve Lash Adjusting Tool Group Released For All 3500 Engines {0600,1105,1121}
1998/09/01

The New 155-1536 Valve Recession Tool Kit Has Been Released {0701,1105}
1998/11/01

Use 155-1536 Valve Recession Tool Kit To Determine Valve Wear{1103}
1999/01/01

Bolts, Washers, And Spacers Grouped Into Fastener Groups In Engine Cylinder Head Groups{1100}
1999/02/01

Be Sure The Cylinder Head Bore For the Unit Injector Is Clean When the Unit Injector Is Replaced {1290}
1999/07/01

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

A New Valve Stem Seal Is Used In The Cylinder Head Groups For All Landfill Applications: New Valve Guides Are Used In All Cylinder Head Groups: Reference Tables Identify Cylinder Head Components For G3500 Series Engines {1104}
2001/01/01

New Valve Guides Are Used {1104}
2001/05/01

New Water Seals Provide Increased Stability At Higher Temperatures {1100, 1124}
2010/10/06

New Cylinder Head Groups and Valve Mechanisms {1100, 1102, 1121, 1123}
2003/12/01

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

A New Cylinder Head Gasket is Used {1124}
2006/07/24

New Exhaust Valves Are Used in Diesel 3500 Commercial Engines {1100, 1105}
2014/01/13

Cat<SUP>®</SUP> Reman Announces the Availability of Remanufactured Cylinder Heads for 3500 and G3500 Engines {1100}
2015/06/26

A New Cylinder Liner Insert Is Now Used On Certain 3500 Engines {1201, 1217}
A New Cylinder Liner Insert Is Now Used On Certain 3500 Engines {1201, 1217}

A New Valve Recession Tool Is Now Available For All G3500 Engines {0374, 0599, 0701, 0703, 1100}
A New Valve Recession Tool Is Now Available For All G3500 Engines {0374, 0599, 0701, 0703, 1100}

Operation and Maintenance Manual

Valve Stem Projection - Measure/Record
G3500 Engines

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}

Testing for Excessive Cylinder Blowby in 3500 Engines{1000, 1100, 1223}
Testing for Excessive Cylinder Blowby in 3500 Engines{1000, 1100, 1223}

New Cylinder Head and Head Gasket Leak Test Procedure Available for 3500 Engines {1100, 1223}
New Cylinder Head and Head Gasket Leak Test Procedure Available for 3500 Engines {1100, 1223}

Service Letter-NACD

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Certain 0R3839 And 0R3840 Remanufactured Cylinder Heads Used For G3500 Engines Need To Be Inspected To Determine If A 4P6925 Oil Sleeve Has Been Installed In The Center Cam Follower Bore
Certain 0R3839 And 0R3840 Remanufactured Cylinder Heads Used For G3500 Engines Need To Be Inspected To Determine If A 4P6925 Oil Sleeve Has Been Installed In The Center Cam Follower Bore

Product Support Program For Installing A New Riser Tube Flange To Cylinder Head Gasket On Certain G3508, G3512, And G3516 Engines
Product Support Program For Installing A New Riser Tube Flange To Cylinder Head Gasket On Certain G3508, G3512, And G3516 Engines

Service Letter-Australia

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-CFEL

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-CSARL

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-Americas

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-Brazil

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-Truck/Ag/Marine

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Technical Information Bulletin

Lubricant For Gas Engines
Lubricant For Gas Engines

Machining Premachined Valve Seat Inserts
Machining Premachined Valve Seat Inserts

Broken Bolt Survey for all 3500 Engines{1100, 7553}
Broken Bolt Survey for all 3500 Engines{1100, 7553}

Incorrect Substitution of the 12 Point Cylinder Head Bolt on all G3500 and 3500 Engines {1100}
Incorrect Substitution of the 12 Point Cylinder Head Bolt on all G3500 and 3500 Engines {1100}

Specifications

Valves
3500 NATURAL GAS ENGINES

Cylinder Heads
3500 NATURAL GAS ENGINES

Cylinder Head
3500 Spark Ignited Engines

Cylinder Head Valves
3500 Spark Ignited Engines

Tool Operating Manual

421-1011 Valve Recession Tool Group used on G3500 C, E, & H Engines{0374, 0599, 0701, 0703, 1100}
421-1011 Valve Recession Tool Group used on G3500 C, E, & H Engines{0374, 0599, 0701, 0703, 1100}

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

M0088789: 550-9152 Gage Ring Assembly {0374, 0599, 0700, 0701, 0759, 1100, 1105}
M0088789: 550-9152 Gage Ring Assembly {0374, 0599, 0700, 0701, 0759, 1100, 1105}

Service Letter-China

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Service Letter-Asia

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Reuse And Salvage Guidelines

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

Reuse and Salvage for Cylinder Head Assemblies {1100, 1101, 1103, 1104, 1105, 1106, 1108, 1109, 1115, 1117, 1121, 1124, 1125}
Reuse and Salvage for Cylinder Head Assemblies {1100, 1101, 1103, 1104, 1105, 1106, 1108, 1109, 1115, 1117, 1121, 1124, 1125}

Reuse & Salvage for Valvetrain Components {1102, 1108, 1109, 1121, 1123}
Reuse & Salvage for Valvetrain Components {1102, 1108, 1109, 1121, 1123}

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

Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock
Certain 8N6862, 8N6863, 7E2867, And 7E2868 Water Seals Need To Be Removed From Parts Stock

Remove All 8N6862 And 8N6863 Seals From Parts Stock
Remove All 8N6862 And 8N6863 Seals From Parts Stock

Disassembly and Assembly

Cylinder Head Assemblies
3500 NATURAL GAS ENGINES

Valves
3500 NATURAL GAS ENGINES

Bridge Dowels
3500 NATURAL GAS ENGINES

Valve Seat Inserts
3500 NATURAL GAS ENGINES

Valve Guides
3500 NATURAL GAS ENGINES

Cylinder Head Assemblies
3512 & 3516 SPARK IGNITED ENGINES

Valves
3512 & 3516 SPARK IGNITED ENGINES

Bridge Dowels
3512 & 3516 SPARK IGNITED ENGINES

Valve Seat Inserts
3512 & 3516 SPARK IGNITED ENGINES

Valve Guides
3512 & 3516 SPARK IGNITED ENGINES

Service Magazine

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

Engine Valve Lash And Fuel Injection Timing Adjustment Procedure {1100,1251}
1985/09/16

Checking Or Adjusting Valve Clearances{1105,1208,1123}
1986/01/13

Adjust Bridge Whenever Valve Clearance Adjustments Are Made{1121,1105,1100}
1986/04/07

Beaded Cylinder Head Gasket Provides A Better Seal For Camshaft Compartment{1100}
1986/05/26

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

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

Check Oil Drain Hole In OR2671 Or OR2621 Remanufactured Cylinder Heads If Head Used With Breather{1100,1300,1317}
1986/10/27

Avoid Oil Contact With New Water Passage Seals Used In Cylinder Head Groups{1100}
1986/12/15

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

Improvements To Prevent Oil Leakage At Cylinder Heads{1100,1221}
1987/11/23

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 Socket In Valve Rocker Arms Provides Lubrication For Inlet Valve Seats {1103,1105,1123}
1988/04/25

Silicone Water Seals Reinstated In Cylinder Heads{1115,1300}
1988/08/01

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

Improved Valve Lifter Assemblies; Better Insert Retention{1112}
1989/02/13

New Extension Assembly Used In Gas Engine Ignition Groups {1558}
1989/05/29

Valve Lifters Can Be Removed Without Removing Cylinder Heads {1112}
1990/07/02

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

Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability{1124}
1990/10/29

Be Sure To Check Inlet Valve Rotocoils After An Engine Overspeed{1109,1105}
1991/01/28

New Rotocoil Used In Cylinder Head Group; New Valve Stem Oil Shield Used In Locomotive Engine Cylinder Head Group{1109,1100}
1991/03/11

Taller Water Seals Used In Cylinder Head Groups {1115}
1992/08/10

New Spacer Plate Gasket Provides Improved Sealing Around Push Rod Compartment{1221}
1992/11/16

New Cylinder Head Bolt Tightening Procedure{1100}
1992/12/21

Modifying Former 2W8888 Rocker Arm Shaft For Use With New 8T7581 Rocker Arm Shaft Bolt{1102}
1992/12/21

Valve Seat Insert Removal Tools {0703,1103}
1993/02/15

New Water Seals Used In Cylinder Head Groups; New Water Seal Assemblies And O-Ring Seals Used In Insert Kit {1115}
1993/02/15

New Cylinder Head Assembly Provides Improved Valve Seat Retention{1100,1103}
1993/06/21

New Cylinder Head Gasket Used{1124}
1993/09/20

New Inlet/Exhaust Valve Has A Chrome Stem {1105}
1993/12/20

New Valve Cover Seals Are Used For Mechanical Unit Injector (MUI) And Electronic Unit Injector (EUI) Engines{1107}
1996/09/30

Quickly And Accurately Set Valve Lash{1105,0766}
1997/01/13

Use 155-1536 Valve Recession Tool Kit To Determine Valve Wear {1103}
1998/11/23

Use 155-8795 Crankshaft Gauge To Determine Distortion {1202}
1998/11/23

Caterpillar Parts SIS Catalog G3512 :

7E-4664 CYLINDER BLOCK GP

7C-6957 CYLINDER BLOCK GP

4P-8335 CYLINDER BLOCK GP

4P-7263 CYLINDER BLOCK GP

2W-8245 CYLINDER BLOCK GP

2W-2944 CYLINDER BLOCK GP

123-6072 CYLINDER HEAD AS

4P-6571 CYLINDER HEAD AS

4P-8300 CYLINDER HEAD AS

7C-3470 CYLINDER HEAD AS

7C-3471 CYLINDER HEAD AS

7W-9486 CYLINDER HEAD AS

123-8649 CYLINDER HEAD GP

123-8650 CYLINDER HEAD GP

Truck sale:

124,000 USD

Caterpillar G3512, Construction
- Stationary Generator Sets
MACALLISTER MACHINERY CO., INC

616,000

Caterpillar G3512, Construction
- mobile generator sets
MILTON CAT POWER SYSTEMS

525,000

Caterpillar G3512, Construction
- mobile generator sets
MILTON CAT POWER SYSTEMS

639,000

Caterpillar G3512, Construction
- mobile generator sets
MILTON CAT POWER SYSTEMS

85,000

Caterpillar G3512EP, Construction
- Stationary Generator Sets
FOLEY EQUIPMENT COMPANY