3S-9643: PTFE Lip seal
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    3S-9643: PTFE Lip seal

    Part Number: 3S-9643
    Brand: Cat
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    PTFE Lip seal

    Crankshaft Seals retain engine oil and prevent external contamination from entering the engine oil system.

    Seals designed for dry applications (air-to-fluid interface) typically include a primary lip that prevents engine oil from leaking, and a dust lip. In wet applications (fluid-to-fluid interface), the dust lip is replaced by an auxiliary lip capable of pumping external fluid away from the engine. Some seals have a plastic sleeve to aid in the installation process.

    Cat® Crankshaft Seals are precisely designed to perform in this very demanding application. They must be able to withstand high rotational speeds, elevated temperatures, and high frequency axial motion.

    Cat® sealing system uses a robust design, testing, and validation process. Buy the latest Genuine Cat® seal to protect your investment.

    Crankshaft seals are used on engine crankshafts and other high speed rotating applications, like some water pumps.

    Warning: This product can expose you to chemicals includingLead and lead compounds, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
    • US
    • Metric
    • Primary Sealing Material: Plastic
    engineer support tractor

    MTC855 85D MTC835 95E 65C MTC845 MT755 MTC735 MT845 75C 85E 65E MTC745 85C 75E 75D MT735 MTC765 MTC755 MT855 75 MT835 MT745 MT865 65D MT765 MTC865

    wheel-type loader
    960F 972H 993K 992D 992K 990H 950F II 950F 990 II 986H 972G II 980F II 966H 966G II 980L 980G 992C 982M 980 980K 994K 988 980M 980C 988K 990K 988K XE 980H 980G II 988H 994 994D 980F 924G 988B 988F 962H 928HZ 966F 992G 980B 928G 988F II 924K 908M OEM 930K 990 980K HLG 994H 986K 992B 930H 988G 992 938G II 994F 924GZ 950K OEM 924H 930M 908H

    engine - generator set
    C15 G3516 G3520C C175-16 3508 C32 C13 3456 C18 GEN SE 3516 3406C C280-16 3516B C18 3512B G3406 G3412 PM3512 G3516C C27 3412 3412C 3516C 3406 G3512H XQC1600 3406E G3512 3512 G3520E C175-20 G3516E PMG3516 3512C C13GENSET XQC1200 G3508 C9 PM3516 3406B G3516H 3408 G3520B 3408C 3608 G3520H 3516E 3508B C18 I6 3508C G3532 D379B G3512E CG170-16 G3412C PM3508 3408B G3516B G3520 XQP300 3306B PP3516 D398B PM3412 3304 C9 GEN SET C-12 3304B XQ425 D399 C13 XQ375 C13 XQ350 C15 I6 PM3456

    wheel-type skidder

    off-highway truck
    793C 793D 773F 797B 777D 777E 785G 777 770G 789 773E 771C 785 772 775B 785C 789D 772B 775G LRC 776D 768C 785B 772G 773G OEM 773B 775G 784B 785D 769C 777G 777C 773D 769D 775E MT4400D AC 777F 775G OEM 769B 769 773G 69D 775D 789C 771D 777B 773G LRC 770 773 793 776 776C 773GC 793B 768B 797 776B 775F 770G OEM 784C 789B 772G OEM

    engine - machine
    C-12 C-9 3176C

    engine - industrial
    3412 3406B 3408 3306 C-12 C-9 3508 3512E C9 G3608 3516B 3408B 3508B G3512 G3612 3176C G3516 G3606 3512 C18 3406C C13 D379 SPF343C 3512B 3512C D399 G343 G3516B G3406 G399 D330C D398 3508C SPF743 G3616 3412E 3516C 3516 G3520B 3406 G3516C C32 D343 G3508 3408C 3412C C15 G3306 C-10 D398B D349 SPS342 G379 G379A D346 G3516E 3612 G3512B 3304 C280-16 D379B C175-16 3516E SPT343 G3408C C27 D348 3408E G3408B C-16 3406E G3412 SPT342 C11 3456 G3512E G3508J G398 3176B G3520J HT400 SUF557 C13B G3606B D333C G333C SBF214 3196 C-15 3306B G3408 SPF343 C175-20 G3508B CPT372 G3516J CG137-12 SCT673 G3512J SPS343 G3512H PMG3516 SR4

    track-type loader
    973C 983 963D 983B 973D

    articulated dump truck
    725 725C 740 740B 745C 745C OEM 730C 730 735B 735C 740 GC 735B OEM D350E II 745 D400D 730C2 735 740C D40D 730C2 EJ 725C OEM 730C OEM D400E II 725C2 735C OEM 735 OEM D350E D400E

    TH417C TH336C TH414C TH514C TH407C TH337C TH406C TH220B

    mini hydraulic excavator
    307E 307E2

    road reclaimer
    SS-250 RM-350B SM-350 RR-250 RM500B RM-250C RM-500 RM-350 RR-250B SS-250B RM-300

    motor grader
    160M 16 16H NA 18M3 16G 140M 160H 12H 140H 160M 2 24H 14M 14M3 120K 2 14G 16H 12G 24M 16M3 16M 140M 2 143H 14L 163H 14H 14M-3 24

    material handler

    wheeled excavator
    M316D M315D M318F OEM M322F M322D M330D M322D MH M320F W345B II W345C MH

    paving compactor
    CS-563E CS-64 CS-433E

    underground articulated truck
    AD45B AD55 AD22 AD30 AD60 AD40 AD55B AD45 AE40 II AE40

    MD6310 MD6200 MD6250

    345D L 350-A L 330D FM 336D2 390F 330D 330C 245B 318D2 352F XE VG 336D2 XE 349F L 323D2 329F L 349D L 336D2 LXE M317D 345B II 5080 385C L 336D2 L 336D LN 385C FS 365B 336D L 330C LN 336D 352F 390D 336F 330C MH 349F 345B L 352F-VG 330D L 374F 374D 374F L 330C L 365C 345C L 345D 345B II MH 323E 350-A 345C 385C 349D2 324D 330D MH 313D2 374D L 345C MH 336D2 GC 349E 328D LCR 352 349D2 L 349 320D RR 340F 385B 420F2 325D L 336D2L OEM 349E L 320E 349F LXE 375-A 313F 330F 335F 340D2 L 312C L 315D L 349D 345B 330-A L 374F OEM 336E L 390F L 320D2 345D L VG 320D 375-A L 323D LN 312D L 390D L 323 314E CR 365B II 349E L VG 245D 329E L OEM 352FMHPU 365B L 245 374F MHPU 330D2 365C L 319D LN 330C FM 326 324D LN 318E 326D2 323F OEM 340D 326F L OEM 349E MH 5110B 5090B 312D2 GC 314D CR 349E L HVG 323D L 315F 390F MHPU 336D2 L XE 390F L OEM 316F 320D2 L 5230 316E L OEM 320D2L OEM 365C L MH 323D 308E2 330D LN 320C 329E 324E L OEM 5230B 5130 336E MHPU 312E 330-A 340D L 5130B 336 385C L MH 336FMHPU 352F OEM

    wheel tractor-scraper
    621G 623F 637E 641 627 666B 666 627E 633C 657B 637D 627G 651B 637 621E 657E 627F 657 621K 623K 623E 631D 621H 627B 623K LRC 631G 621B 633D 637G 631K 631E 613C 657G 621 660B 621K OEM 621F 613C II 631C 637K 633E II 639D 623G 651 623B 651E 627H 627K 650B 627K LRC 641B 615C II 623H

    earthmoving compactor
    836K 825C 836G 836 825G 826C 825K 815F 825H 826G 826K 826B 836H 825 815F II 825G II 826G II 825B 826H 816F 816F II

    SR4 SR5 WEG XQP500 SR500

    petroleum products
    C280-12 2016 C13 C9 3512C TH48-E70 C15 TH48-E80 CX38-P892 CX35-C18I 3512B CX31-P600 3516B 3512E 3516 CX31-C13I TH31-E61 TH35-E81 3508C C27 3512 C-15 3516C CX35-P800 C18 C11 C32 CX31-C18I 3508B TH35-C13I CX31-C11I CX31-C15I CX38-P800 TH31-C9P CX48-P2300 TH31-C9I TH35-C15I TH48 3412E TH35-C11I CX31-C9I

    engine - truck
    3306B 3408 1674 3176 C9 C15 C-10 3306 C-12 3406 3406C 3406B C-15 1676 C13 3406E 3116 3408B 3126 3176B 3208 C11 3306C 1673C C18 C-9 C16 1693 C-16 C-18

    cold planer
    PM-201 PM-565 PM820 PM822 PR-1000C PM620 PM-565B PM825 PM-200 PR-750B PM622 PR-1000 PR-450 PR-450C PM-465

    forest products
    TK1051 511 2590 2290 2390 2491 541 TK751 TK752 345C 522 TK721 552 2 TK732 522B 2391 TK741 551 532 521B TK722 586C 521 552 TK711 541 2

    track-type skidder
    527 OEM 527

    backhoe loader
    416F 416E 416E III 450F OEM 420D 416F2

    skid steer loader
    259D 287D 287B 297C 277C 299C 289C

    wheel dozer
    814B 824H 844 834G 834B 854K 824S 844K 814F 834K 854G 824B 834 834U 824G II 824K 814F II 824C 844H 834S 834H 824G

    asphalt paver

    583T 587R 572R II 583K PL83 PL72 583R 578 587T PL87 589

    marine products
    3608 3606 3616 3126 C32 3512C D379B 3508B 3512B C140-16 C18 3516C 3508 3516 3512 3516B D398B D348 3512E 3116 3406C D379A D399 C280-16 3508C 3408C C280-6 3176B 3406B C9 C280-8 3412E C280-12 D346 3412C 3412D 3196 C7 3612 D398A C30 G3512E 3408B 3516E C12 3304 3412 D333C 3176C 3408 D349 3126B C-12 3406 C15 D330C 3406E 3306

    expanded mining products
    6015B MD5075 6020B MD6290 MD5150C MD6540C 6015 6030 6018 MD5125 6015 FS 6040 6040 FS

    track-type tractor
    8 D6T D6R III D6R II D10 10SU 58 8U 11 D8H D8R D9T D8T 8A D7R II D10T D7R D11N D9N 8S D11T D6R STD 9SU D8L D6R D8K 8SU 9U 10C D9R D8N 9C D11R D7R XR 9 D10T2 D7R LGP D10N 10 59 11SU 57H D5G LGP D6R XL D6R LGP D9L 9S 59N D8R II 10U D10R D5M 59L 10S 11U 8D 58L 183B

    load, haul, dump
    R1700G R2900G R1700 II R2900 R1600G R1700K R1600H R3000H R1600

    oem solutions
    CX35 C15 C18 CAT WDS C11