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7N1302 CYLINDER HEAD GROUP Serial No. 70V3145 to 70V3697 inclusive Part of 4N2260 Cylinder Head Group shown on Page 19B 621B


BASIC ENGINE
CYLINDER HEAD GP
VALVE MECHANISM GP
LIFTING GP-ENGINE
SERVICE EQUIPMENT AND SUPPLIES
GASKET & SEAL KITS
BASIC ENGINE
VALVE MECHANISM GP

WHEEL TRACTOR 621B WHEEL TRACTOR 45P
 3406 VEHICULAR ENGINE 45P00001-UP (MACHINE) UEG0835S 621B 45P   (1973)

BASIC ENGINE

CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GROUP
4N-0749 CYLINDER HEAD GROUP
CYLINDER HEAD GP
6N-9943 CYLINDER HEAD GP
CYLINDER HEAD GP
7N-1302 CYLINDER HEAD GP
CYLINDER HEAD GP
7N-1302 CYLINDER HEAD GP
 

#UEG0835S0050
 

7N-1302: CYLINDER HEAD GP

7N1302 CYLINDER HEAD GROUP
Serial No. 70V3145 to 70V3697 inclusive
Part of 4N2260 Cylinder Head Group shown on Page 19B
c162996 UEG0835S
7N1302 CYLINDER HEAD GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-5906 [24] SPRING  
2. 2N-5571 [24] ROTOCOIL  
3. 2A-4429 [48] LOCK  
4. 7N-1303 R [1] HEAD ASSEM.  
    (Includes)
5. 2N-5775 [12] DOWEL  
6. 4N-5893 [12] INSERT (intake)  
  4S-8898 H [12] INSERT .13mm(.005in.)oversize  
  4S-8899 H [12] INSERT .26mm(.010in.)oversize  
7. 2M-6471 [1] PLUG  
8. 9S-9699 [12] INSERT (exhaust)  
  4S-8902 H [12] INSERT .13mm(.005in.)oversize  
  4S-8903 H [12] INSERT .26mm(.010in.)oversize  
9. 3B-0623 [10] PLUG  
10. 4N-2803 [24] GUIDE  
11. 3B-0645 [12] PLUG  
12. 4N-5654 [12] VALVE (intake)  
13. 4N-5653 [1] VALVE (exhaust)  
  H   NOT PART OF 7N1303 ASSEM.
  R   REMFG PART MAY BE AVAILABLE
 

#UEG0835S0051
 

7N-1302: CYLINDER HEAD GP

7N1302 CYLINDER HEAD GROUP
Serial No. 70V3698-Up
Part of 4N2260 Cylinder Head Group shown on Page 19B
c213963 UEG0835S
7N1302 CYLINDER HEAD GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-5906 [24] SPRING  
2. 6N-7154 C [24] ROTOCOIL  
3. 2A-4429 [48] LOCK  
4. 7N-1303 R [1] HEAD ASSEM.  
    (Includes)
5. 2N-5775 [12] DOWEL  
6. 4N-5893 [12] INSERT (intake)  
  4S-8898 J [12] INSERT .13mm(.005in.)oversize  
  4S-8899 J [12] INSERT .26mm(.010in.)oversize  
7. 2M-6471 [1] PLUG  
8. 9S-9699 [12] INSERT (exhaust)  
  4S-8902 J [12] INSERT.13mm(.005in.)oversize  
  4S-8903 J [12] INSERT.26mm(.010in.)oversize  
9. 3B-0623 [10] PLUG  
10. 4N-2803 [24] GUIDE  
11. 3B-0645 [12] PLUG  
12. 4N-5654 [12] VALVE (intake)  
13. 7N-4580 C [12] VALVE (exhaust)  
  C   INDICATES CHANGE
  R   REMFG PART MAY BE AVAILABLE
  J   NOT PART OF 7N1303 ASSEM.
 

#UEG0835S0052
 

4N-2271: VALVE MECHANISM GP

4N2271 VALVE MECHANISM GROUP
4N1045 Rocker Arm parts are shown on Page 23
See Page 78 for Gasket Kits
c208835 UEG0835S
4N2271 VALVE MECHANISM GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-1045 CY [2] ROCKER ARM GROUP  
    (Separate Illustration)
2. 4N-5611 C [6] BRIDGE ASSEM. (exhaust)  
    (Each Includes)
3. 2N-5842 [1] SCREW  
  9L-7712 [1] NUT  
4. 2P-9845 [6] BOLT  
  5H-1504 [6] WASHER  
5. 4N-5609 [12] ROD  
6. 6N-6872 C [12] SPRING  
7. 6N-4589 RC [12] LIFTER ASSEM.  
8. 4N-5612 C [6] BRIDGE ASSEM. (intake)  
    (Each Includes)
9. 2N-5842 [1] SCREW  
  9L-7712 [1] NUT  
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
  C   INDICATES CHANGE
 

#UEG0835S0053
 

4N-4953: COVER GP-VALVE MECHANISM

4N4953 VALVE MECHANISM COVER GROUP
c214046 UEG0835S
4N4953 COVER GP-VALVE MECHANISM Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-4535 [2] BASE  
  5P-5678 CD SEAL 2.91 m(114.50 in.)  
2. 9L-8925 [26] BOLT  
3. 4N-4536 [1] COVER  
  5P-5678 CD SEAL 1.44 m(56.75 in.)  
4. 4N-0851 [1] ADAPTER  
5. 4N-4537 [1] COVER  
  5P-5678 CD SEAL 1.44 m(56.75 in.)  
6. 4N-4957 [1] PLUG  
  C   INDICATES CHANGE
  D   ORDER BY THE METRE
 

#UEG0835S0054
 

4N-2261: LIFTING GP

4N2261 LIFTING EYE GROUP
c216122 UEG0835S
4N2261 LIFTING GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-4308 [1] EYE-LIFTING (FRONT)  
2. 6N-7933 C [1] PLATE  
3. 0S-1595 C [4] BOLT  
4. 1A-2029 C [10] BOLT  
5. 2M-0849 C [4] WASHER  
6. 5M-2894 C [10] WASHER  
  C   CHANGE FROM PREVIOUS TYPE
 

#UEG0835S0055
 

4N-0744: LIFTING GP

4N744 LIFTING EYE GROUP
c228120 UEG0835S
4N0744 LIFTING GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1594 C [8] BOLT  
2. 4N-8501 [1] SUPPORT ASSEM.  
3. 4N-4308 [1] EYE  
4. 0S-1595 [4] BOLT  
  2M-0849 [4] WASHER  
5. 5M-2894 C [8] WASHER  
  C   INDICATES CHANGE
 

#UEG0835S0056
 

4N-1331: LIFTING GP

4N1331 LIFTING EYE GROUP
c149051 UEG0835S
4N1331 LIFTING GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4N-4308 [1] EYE-LIFTING (FRONT)  
2. 4N-5186 [1] EYE-LIFTING (REAR)  
3. 0S-1594 C [8] BOLT  
4. 0S-1595 C [4] BOLT  
5. 2M-0849 C [4] WASHER  
6. 5M-2894 C [8] WASHER  
  C   CHANGE FROM PREVIOUS TYPE
 

#UEG0835S0057
 

7N-0628: GASKET GROUP

7N628 GASKET GROUP--Field Installation
Serial No. 70V1 to 70V3144 inclusive. Eliminates oil transfer from rocker arm oil
supply holes to water jacket areas. Note: 7N624 Cylinder Block Plate is available
UEG0835S0057 UEG0835S
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  7N-0623 [6] SEAL CYLINDER LINER  
  7N-0631 [1] GASKET CYLINDER BLOCK PLATE  
  7N-0632 [1] GASKET CYLINDER BLOCK TO CYLINDER HEAD  
 

#UEG0835S0058
 

4N-1045: ROCKER ARM GP

4N1045 ROCKER ARM GROUP
Serial No. 70V1 to 70V3144 inclusive
Part of 4N2271 Valve Mechanism Group shown on Page 21
c214020 UEG0835S
4N1045 ROCKER ARM GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 006-7403 [1] RETAINER  
2. 2N-7228 [4] WASHER  
3. 4N-0955 [2] PIN  
4. 2N-7229 [2] SPRING  
5. 4N-0839 [1] SHAFT ASSEM.  
6. 5B-1866 [2] PLUG  
7. 4N-0833 [3] BRACKET  
8. 4N-5614 [6] ARM ASSEM.  
9. 9L-7712 [6] NUT  
10. 1A-2935 [6] SCREW  
 

#UEG0835S0059
 

4N-1045: ROCKER ARM GP

4N1045 ROCKER ARM GROUP
Serial No. 70V3145-Up
Part of 4N2271 Valve Mechanism Group shown on Page 21
c214021 UEG0835S
4N1045 ROCKER ARM GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 006-7403 [1] RETAINER  
2. 2N-7228 [4] WASHER  
3. 4N-0955 [2] PIN  
4. 2N-7229 [2] SPRING  
5. 4N-0839 [1] SHAFT ASSEM.  
6. 5B-1866 [2] PLUG  
7. 7N-1198 [2] BRACKET  
8. 4N-5614 [6] ARM ASSEM.  
9. 7N-1130 C [1] BRACKET  
10. 1A-2935 [6] SCREW  
11. 9L-7712 [6] NUT  
  C   INDICATES CHANGE
 

Information:

Engine News
A Modified Procedure Is Now Used to Seal the Mating Surfaces of the Cylinder Block and the Gasket on C15 And C18 Engines {1100, 1124, 1201}
A Modified Procedure Is Now Used to Seal the Mating Surfaces of the Cylinder Block and the Gasket on C15 And C18 Engines {1100, 1124, 1201}
Special Instruction
Installation of 0R1160, 0R1161 and 0R1248 Remanufactured Cylinder Head Groups{1100}
Installation of 0R1160, 0R1161 and 0R1248 Remanufactured Cylinder Head Groups{1100}
3400 Cylinder Head To Block Joint Repair Procedure{1124}
3400 Cylinder Head To Block Joint Repair Procedure{1124}
INSTALLATION OF 7N628 GASKET SERVICE GROUP{1101, 1221}
INSTALLATION OF 7N628 GASKET SERVICE GROUP{1101, 1221}
Use Of The 5P7333 Tool Group For Bridge Dowel Repair{1101}
Use Of The 5P7333 Tool Group For Bridge Dowel Repair{1101}
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}
Installation Of 2W3815 Or 5N93 Inserts{1217}
Installation Of 2W3815 Or 5N93 Inserts{1217}
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}
Oversized Injector Sleeves for Remanufactured Cylinder Heads On Medium Sized Engines{1100, 1101, 1125}
Oversized Injector Sleeves for Remanufactured Cylinder Heads On Medium Sized Engines{1100, 1101, 1125}
Rocker Valley Inserts Are Now Used in Remanufactured Cylinder Heads{1100, 1102}
Rocker Valley Inserts Are Now Used in Remanufactured Cylinder Heads{1100, 1102}
Specifications
Valves
3406 ENGINE FOR CATERPILLAR BUILT MACHINES
Intake Valve Timing
3406 ENGINE FOR CATERPILLAR BUILT MACHINES
Cylinder Head
3406 ENGINE FOR CATERPILLAR BUILT MACHINES
Cylinder Head Valves
3406C Engines for Caterpillar Built Machines
Cylinder Head
3406C Engines for Caterpillar Built Machines
Tool Operating Manual
370-8083 Plate Assembly - Lifting{0700, 0701, 0703, 1000, 1100}
370-8083 Plate Assembly - Lifting{0700, 0701, 0703, 1000, 1100}
Operating Instructions for 155-1536 Valve Recession Tool Kit for all G3500 and 3500 Engines{0374, 0599, 0701, 0703, 0759, 0767}
Operating Instructions for 155-1536 Valve Recession Tool Kit for all G3500 and 3500 Engines{0374, 0599, 0701, 0703, 0759, 0767}
Operating Instructions for 148-2997 Valve Recession Tool Group Used On 3600, G3600, and C175 Engines{0374, 0599, 0701, 0703, 0759}
Operating Instructions for 148-2997 Valve Recession Tool Group Used On 3600, G3600, and C175 Engines{0374, 0599, 0701, 0703, 0759}
185-5321 Cylinder Head Lifting Hook Assembly{0599, 0632, 0703, 1101, 6459}
185-5321 Cylinder Head Lifting Hook Assembly{0599, 0632, 0703, 1101, 6459}
188-3922 Broken Exhaust Bolt and Stud Removal Group for 3114, 3116, 3126, 3126B, 3176, 3176B, C-10, and C12 Engines{0374, 0599, 0701, 0702, 0703}
188-3922 Broken Exhaust Bolt and Stud Removal Group for 3114, 3116, 3126, 3126B, 3176, 3176B, C-10, and C12 Engines{0374, 0599, 0701, 0702, 0703}
CRB Valve Spring Testers 8S-2263 and 4C-9496{0374, 0599, 0700, 0701, 1108}
CRB Valve Spring Testers 8S-2263 and 4C-9496{0374, 0599, 0700, 0701, 1108}
{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}
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}
Testing and Adjusting
Engine Valve Lash - Inspect/Adjust
3406E and 3456 Engines for Caterpillar Built Machines
Disassembly and Assembly
Fuel Valve Adapters
SUPPLEMENT FOR 3406 SCROLL FUEL SYSTEM
Precombustion Chambers
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Cylinder Head
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Valves
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Valve Seat Inserts
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Bridge Dowels
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Valve Guides
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Electronic Unit Injector Sleeve - Install
3406E and 3456 Engines for Caterpillar Built Machines
Electronic Unit Injector Sleeve - Remove
3406E and 3456 Engines for Caterpillar Built Machines
Camshaft Bearings - Remove
3406E and 3456 Engines for Caterpillar Built Machines
Camshaft Bearings - Install
3406E and 3456 Engines for Caterpillar Built Machines
Cylinder Head - Remove
3406E and 3456 Engines for Caterpillar Built Machines
Cylinder Head - Install
3406E and 3456 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Guides - Remove and Install
3406E and 3456 Engines for Caterpillar Built Machines
Inlet and Exhaust Valves - Remove and Install
3406E and 3456 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Seat Inserts - Remove and Install
3406E and 3456 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Springs - Remove and Install
3406E and 3456 Engines for Caterpillar Built Machines
Rocker Arm and Shaft - Install
3406E and 3456 Engines for Caterpillar Built Machines
Rocker Arm and Shaft - Remove
3406E and 3456 Engines for Caterpillar Built Machines
Camshaft Bearings - Remove
C15 and C18 Engines for Caterpillar Built Machines
Camshaft Bearings - Install
C15 and C18 Engines for Caterpillar Built Machines
Electronic Unit Injector Sleeve - Install
C15 and C18 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Seat Inserts - Remove and Install
C15 and C18 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Guides - Remove and Install
C15 and C18 Engines for Caterpillar Built Machines
Inlet and Exhaust Valve Springs - Remove and Install
C15 and C18 Engines for Caterpillar Built Machines
Inlet and Exhaust Valves - Remove and Install
C15 and C18 Engines for Caterpillar Built Machines
Rocker Arm and Shaft - Install
C15 and C18 Engines for Caterpillar Built Machines
Cylinder Head - Remove
C15 and C18 Engines for Caterpillar Built Machines
Cylinder Head - Install
C15 and C18 Engines for Caterpillar Built Machines
Electronic Unit Injector Sleeve - Remove
C15 and C18 Engines for Caterpillar Built Machines
Rocker Arm and Shaft - Remove
C15 and C18 Engines for Caterpillar Built Machines
Service Magazine
Remanufactured Short Blocks Are Available For Repairs Of Early 3406 Engines{1201,1101,1102}
1980/03/31
New Fuel Nozzle Adapter Assembly Used{1106}
1982/02/15
Reconditioning of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1100}
1982/03/08
Vacuum Tester Checks For Leaks Between Valve Face and Seat{0651,1103,1105}
1982/09/06
Improved Inlet And Exhaust Valves{1105}
1982/09/06
Fuel In The Cooling System Or Coolant In The Engine Oil Can Result From Cracked Fuel Nozzle Adapter{1106}
1982/10/18
New 6V7059 Micrometer Measures Liner Top Flange And Valve Lip {0653,1216,1105}
1982/11/29
Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads{1201,1101,1103,1105}
1982/12/20
Engine Valve Stem "Use Again" Specifications{0653,1105}
1983/02/28
New Liner Seat Insert Available{1217}
1983/08/15
Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}
1983/10/17
New Cylinder Head Assembly Made With A Different Material {1101}
1984/02/06
New Adapter Assemblies And Clamps Hold Fuel Nozzles In Position{1106,1252}
1984/04/09
Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads{1201,1101,1103,1105}
1984/04/23
Surface Grinding Of Compacted Graphite Iron Cylinder Heads{1101}
1984/07/02
New Inlet Valve Used{1105}
1984/09/03
New High Alloy Material Is Used In Cylinder Head Assemblies{1101}
1984/10/15
New Cylinder Heads, Fuel Nozzles And Fuel Nozzle Adapters Used{1101,1106}
1984/10/29
Remanufactured Cylinder Head Groups{1100,1101,7554}
1984/11/19
Valve Lash Adjustment Not A Warranty Item {1102,1105}
1985/01/14
Use Care When Handling Water Seals For Cylinder Head Spacer Plates{1115}
1985/07/15
Determining The Cause Of Glow Plug Tip Failures{1053,1105,1412}
1986/06/02
Valve Lash Adjustment Interval Is Changed {1105}
1986/07/07
Indications Of Engine Overspeeding When Only One Cam Lobe/Lifter Has Failed{1000,1100,1200}
1986/09/08
New Water Temperature Regulator Has A Closer Fit At The Valve Seat To Keep Leakage At A Minimum{1355}
1977/01/17
Same Valve Camshaft Assembly Used On Direct Injection Engines Now Used On Engines That Have Precombustion Chambers{1210}
1977/01/24
Improved Exhaust Valve Now Available{1105}
1977/02/28
Correct Installation Of Valve Lifters On The Camshaft Is Very Important To Prevent Failures{1209}
1977/05/16
Clean Bolt Holes In Cylinder Block Before Cylinder Heads Are Installed{1101,1201}
1977/08/08
Tools Now Available To Ream And/Or Hone 0.500" (12.70 mm) Diameter Valve Guides{0663}
1977/08/22
Salvage Of Cylinder Heads By Using Oversized Valve Guides And Valve Inserts {1104,1103}
1987/03/30
Silicone Rubber Water Seals Available{1100}
1987/07/06
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
Head Bolt Holes In Cylinder Blocks Can Be Repaired{1201,1101}
1988/10/24
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 Head Gasket Used; Summary Of Earlier Gaskets And Service Tips{1124,1216,1221}
1989/08/21
Additional Information For Checking Valve Camshaft Timing{1105,1110,1112,1121}
1989/12/11
Reconditioning Of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1121}
1990/04/30
New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads{1105,1101}
1990/10/08
Cylinder Head Gaskets Improved To Provide Better Fire Ring Retention{1124}
1994/02/07
Identification Of Intake And Exhaust Valves That May Be Used In Remanufactured Direct Injected 3400 Cylinder Heads{1105}
1994/04/04
New Intake And Exhaust Valves Used{1105,1100}
1994/06/20
New Rocker Arm Adjustment Screw Used To Adjust Valve Clearance{1123,1100}
1994/06/20
New Cylinder Head Gasket, Spacer Plate And Head Bolts Used; New Cylinder Liner Projection Measurement Method; New Cylinder Head Torque Sequence; Improved Coolant Flow (Cylinder Heads) {1124,1221,1216,1101}
1994/07/04
Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}
1994/09/05
New Water Seals Used In Cylinder Head Assemblies{1124}
1994/09/05
New Stronger Cylinder Head Bolts Used {1100}
1996/05/13
Torque Check Necessary For Front Support Bracket Bolts When Damper And Pulley Are Removed {1153}
1996/05/13
Caterpillar Warranty Claims on Cylinder Head Valves {1105}
2005/10/03
Clearly Mark all of the Cracks on the Cylinder Head {1101, 7754}
2006/04/10
A New Outer Valve Spring Is Now Used {1100, 1108}
2008/11/17
Cylinder Head And Spacer Plate Gasket Failures On Certain Machine Engines {1100, 1201}
2015/05/15

Caterpillar Parts SIS Catalog 621B :

CYLINDER HEAD GP
6N-9943 CYLINDER HEAD GP
CYLINDER HEAD GROUP
4N-0749 CYLINDER HEAD GROUP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2260 CYLINDER HEAD GP
CAMSHAFT AS
6N-4991 CAMSHAFT AS
CAMSHAFT ASSEMBLY
6N-1405 CAMSHAFT ASSEMBLY
CYLINDER HEAD GP
7N-1302 CYLINDER HEAD GP
VALVE MECHANISM GP
4N-2271 VALVE MECHANISM GP
COVER GP-VALVE MECHANISM
4N-4953 COVER GP-VALVE MECHANISM
LIFTING GP
4N-2261 LIFTING GP
LIFTING GP
4N-0744 LIFTING GP
LIFTING GP
4N-1331 LIFTING GP
7N-0628 GASKET GROUP
ROCKER ARM GP
4N-1045 ROCKER ARM GP

Truck sale:

Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
FINNING CANADA
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
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AVSpare.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only. Cat® and Caterpillar® are registered trademarks of Caterpillar, Inc.