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4N2260 CYLINDER HEAD GROUP*R 4N749 CYLINDER HEAD PARTS ARE SHOWN ON PAGE 37. SEE PAGE 121 FOR GASKET KITS. ONLY SEPARATE PARTS SERVICED. SERIAL NO 70V1 TO 70V2265 621B


BASIC ENGINE
CYLINDER HEAD GP

WHEEL TRACTOR 621B WHEEL TRACTOR 35V
 3406 ENGINE 35V00001-UP (MACHINE) ZEBP0576 621B 35V   (1974)

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
 

#ZEBP05760050
 

4N-2260: CYLINDER HEAD GP

4N2260 CYLINDER HEAD GROUP*R
4N749 CYLINDER HEAD PARTS ARE SHOWN ON PAGE 37. SEE PAGE 121 FOR GASKET
KITS. ONLY SEPARATE PARTS SERVICED. SERIAL NO 70V1 TO 70V2265
c205466 ZEBP0576
4N2260 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 4N-3714 [6] CHAMBER ASSEM.  
4. 5F-4899 C [12] BOLT  
5. Y [1] CYLINDER HEAD  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 C [2] PLUG  
9. 4N-1044 [1] GASKET  
10. 7L-0520 C [12] STUD  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 C [1] PLUG  
    (Use Without Air Compressor)
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760051
 

4N-2260: CYLINDER HEAD GP

4N2260 CYLINDER HEAD GROUP*R
4N749 CYLINDER HEAD PARTS ARE SHOWN ON PAGE 37
ONLY SEPARATE PARTS SERVICED. SERIAL NO 70V2266 TO 70V2773
c158808 ZEBP0576
4N2260 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 4N-3714 [6] CHAMBER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 4N-0749 CY [1] CYLINDER HEAD  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 4N-1044 [1] GASKET  
10. 4S-6137 C [11] STUD 8.13 cm(3.20 in.) long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (Use Without Air Compressor)
14. 7L-0520 C [1] STUD 5.08 cm(2 in.) long  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760052
 

4N-2260: CYLINDER HEAD GP

4N2260 CYLINDER HEAD GROUP*R
6N9943 CYLINDER HEAD PARTS ARE SHOWN ON PAGE 38
ONLY SEPARATE PARTS SERVICED.SERIAL NO 70V2774 TO 70V3144
c161294 ZEBP0576
4N2260 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 4N-3714 [6] CHAMBER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 6N-9943 CY [1] CYLINDER HEAD  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 4N-1044 [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.) long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (Use Without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760053
 

4N-2260: CYLINDER HEAD GP

4N2260 CYLINDER HEAD GROUP*R
SERIAL NO. 70V3145 TO 70V10345 INCLUSIVE
7N1302-PAGE 38A
c162994 ZEBP0576
4N2260 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 4N-3714 [6] CHAMBER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 7N-1302 CY [1] CYLINDER HEAD  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 C [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.)long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (Use without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 C [2] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760054
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V10346-13900, 14002-14150
7N1302-PAGE 38B
c228021 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 9N-5431 C [6] ADAPTER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 7N-1302 CY [1] HEAD GROUP  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 C [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.)long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (For Use Without Air Compressor)
14. 7L-0520 C [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 C [2] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760055
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V13901-14001
1W5678-PAGE 38B.01
c301719 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 9N-5431 [6] ADAPTER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 1W-5678 CY [1] HEAD GROUP  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.)long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (For Use Without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 [2] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760056
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V14151-14324
1W5281-PAGE 38B.02
c301720 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 9N-5431 [6] ADAPTER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 1W-5281 CY [1] HEAD GROUP  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.)long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (For Use Without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 [2] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760057
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V14325-15907
7N1302-PAGE 38B
c301722 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 1W-7884 C [6] ADAPTER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 7N-1302 CY [1] HEAD GROUP  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 [4] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 [1] GASKET  
10. 4S-6137 [11] STUD 8.13 cm(3.20 in.) long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (For Use Without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 [2] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760058
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V15908-16324
1W5678-PAGE 38B.01
c307271 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 1W-7884 [6] ADAPTER ASSEM.  
4. 5F-4899 [12] BOLT  
5. 1W-5678 CY [1] HEAD GROUP  
    (Separate Illustration)
6. 6L-7442 [6] STUD  
7. 3J-5390 C [3] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 [1] GASKET  
10. 4S-6137 [11] STUD 8.13cm(3.20 in.)long  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (For Use Without Air Compressor)
14. 7L-0520 [1] STUD 5.08 cm(2 in.) long  
15. 3S-5496 [2] SEAL  
16. 7M-7410 C [1] PLUG  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#ZEBP05760059
 

4N-2270: CYLINDER HEAD GP

4N2270 CYLINDER HEAD GP
S/N 70V16325-16451
7N1302-PAGE 38B
c313799 ZEBP0576
4N2270 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-7253 [6] GASKET  
2. 2S-2251 [6] SEAL  
3. 2W-9758 C [6] ADAPTER AS.  
4. 5F-4899 [12] BOLT  
5. 7N-1302 CY [1] HEAD GROUP  
6. 6L-7442 [6] STUD  
7. 3J-5390 [3] PLUG  
8. 3J-5389 [2] PLUG  
9. 7N-0626 [1] GASKET  
10. 4S-6137 [11] STUD 8.13CM(3.20IN.)LONG  
11. 2H-3750 [20] BOLT  
  5H-1504 [20] WASHER  
12. 4N-2269 [24] SEAL  
13. 3J-5389 [1] PLUG  
    (FOR USE WITHOUT AIR COMPRESSOR)
14. 7L-0520 [1] STUD 5.08CM(2IN.)LONG  
15. 3S-5496 [2] SEAL  
16. 7M-7410 [1] PLUG  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

Information:

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}
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
Tool Operating Manual
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}
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
Service Magazine
Remanufactured Short Blocks Are Available For Repairs Of Early 3406 Engines{1201,1101,1102}
1980/03/31
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
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
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

Caterpillar Parts SIS Catalog 621B :

CAMSHAFT ASSEMBLY
6N-1405 CAMSHAFT ASSEMBLY
CAMSHAFT AS
6N-4991 CAMSHAFT AS
CAMSHAFT GP
6N-4992 CAMSHAFT GP
CAMSHAFT ASSEMBLY
4N-6598 CAMSHAFT ASSEMBLY
CAMSHAFT GROUP
4N-0961 CAMSHAFT GROUP
CAMSHAFT GROUP
6N-1406 CAMSHAFT GROUP
PISTON & ROD GP
7N-3519 PISTON & ROD GP
PISTON GP
1W-9373 PISTON 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-2270 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2270 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2270 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2270 CYLINDER HEAD GP
CYLINDER HEAD GP
4N-2270 CYLINDER HEAD 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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The names Cat, Caterpillar, John Deere, Komatsu, Volvo, Hitachi, Doosan, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
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.