Crankshafts Seals

Crankshafts Seals

The crankshaft seal is the primary barrier that keeps oil from leaking from the rear or front end of the crankshaft. Over time, crankshaft seals can dry out, break, or wear a groove into the crankshaft, allowing oil to leak.

Some CTP crankshaft seals come with a steel wear sleeve which creates a new surface for the seal. These seals/sleeves combination is pressed on the crankshaft at the same time, specialty tools are required for the installation. Many new seals are PTFE (polytetrafluoroethylene) type. PTFE seals provide low friction sealing with minimal oil lubrication requirement.

PTFE Installation tips:

  • To protect the seal from dust and other contamination, only remove the seal from the protective packaging at the time of installation.
  • The sealing lip of a PTFE oil seal is protected by a plastic sleeve, which sometimes can be used as an assembly aid. The sleeve protective sleeve must remain in place until the seal has been installed.
  • Both the PTFE sealing lip and the shaft surface must be completely dry. Do not use any grease or oil.
  • The shaft surface must be in a perfect condition in order to have a good running seal surface. Do not start the engine sooner than a couple of hours after installation, this allows the new sealing lip to adapt properly to the shaft.

Caution: If the sealing surface has a wear groove, the seal lip of the new seal should not run in the same position as the old seal.

 

CTP Crankshaft Seals are packed with a special anti-rust paper that extends the shelf life of the seal.

 

Crankshafts Seals

wdt_ID PART NO. DESCRIPTION ENGINE APPLICATION
1 1.005.421 SEAL GP-CRANKSHAFT (REAR) 3176, 3176B, 3176C, 3196, C-10, C-12, C-15, C-16, C11, C13, C15, C18 14M, 16M, 3176, 3176B, 3176C, 3196, 345D L, 349D, 349D L, 349E, 349E L, 572R II, 980K, 980K HLG, 980M, 982M, CPT372, CX31-C13I, CX31-C15I, CX31-C18I, CX35-C
2 1.138.432 SEAL GP-CRANKSHAFT (CLOCKWISE ROTATION) 3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B, 3516C 5130, 5130B, 5230, 5230B, 776C, 776D, 777, 777B, 777C, 777D, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793B, 793C, 793D, 797
3 1.138.433 SEAL GP-CRANKSHAFT (COUNTERCLOCKWISE ROTATION) 3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B, 3516C 5130, 5130B, 5230, 5230B, 776C, 776D, 777, 777B, 777C, 777D, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793B, 793C, 793D, 797
4 1.175.015 SEAL AS-OIL (REAR) 3044C 236B, 236B3, 242B3, 246C, 252B, 252B3, 256C, 257B3, 259B3, 262C, 262C2, 267B, 268B, 272C, 277C, 277C2, 279C, 279C2, 287C, 287C2, 289C, 289C2, 297C, 299C, 303.5C, 303.5D, 303C CR, 304C CR, 304D
5 1.260.110 SEAL GP (REAR) 3176B, 3176C, 3196, C-10, C-12 345B, 345B II, 345B II MH, 345B L, 365B, 365B L, 480, 65E, 75C, 75D, 75E, 85C, 85D, 85E, 95E, D7R II, R1600, R1600G, R1700G, W345B II
6 1.425.867 SEAL CRANKSHAFT (FRONT) 3406, 3406B, 3406C, 3406E, 3408, 3408B, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3456 16G, 16H NA, 24H, 24M, 365C, 365C L, 365C L MH, 374D L, 374F L, 375, 375 L, 385B, 385C, 385C FS, 385C L, 385C L M
7 1.425.868 SEAL CRANKSHAFT (REAR) 3406, 3406B, 3406C, 3406E, 3408, 3408B, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3456 16G, 16H NA, 24H, 24M, 375, 375 L, 5080, 5110B, 578, 583R, 583T, 587R, 587T, 589, 621B, 621E, 621F, 621G, 621H
8 1.438.839 SEAL (REAR) 3054B 924G, 924GZ
9 1.441.264 SEAL GP-CRANKSHAFT (FRONT) (CLOCKWISE ROTATION) C-12, C13 572R II, D7R II
10 1.526.556 SEAL GP-CRANKSHAFT (REAR) 3034 216, 228, 236, 247, 248, 267, 287, 906

Crankshafts Seals for Komatsu

wdt_ID PART NO. DESCRIPTION ENGINE APPLICATION
1 6150-21-3230 SEAL (FRONT) KOMATSU SAA6D125E 6D125
2 6151-21-4161 SEAL (REAR) KOMATSU S6D140, S6D140E, SA6D125E, SA6D140, SA6D140E, SAA6D125E, SAA6D140E PC400, PC450, PC490
3 6736-21-4221 SEAL (REAR) KOMATSU S6D102E, SA6D114E, SAA4D107E, SAA6D102E, SAA6D107E, SAA6D114E PC200, PC200LL, PC220, PC220LL, PC240, PC270, PC290, PC300, PC300HD, PC300LL, PC350, PC350HD, PC350LL, WA250, WA320, WA380, WA430

* Other part no. not included in the list are available. Please contact your sales representative if you have any questions. Part Numbers are used for reference purposes only.

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