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Cummins 6BT 6.7 QSB, CM850

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AVAILABLE EQUIPMENT MODELS
Engine Series: QSB
Engine Model: 6BT 6.7 QSB
Engine Desc: CM850
Engine Data:

24 VALVE
REAR GEAR TRAIN
Engine Info: 6 Cyl
Engine Dimensions:

Bore: 4.21 in / 107 mm

Stroke: 4.88 in / 124 mm
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    Equipment Models

    Cummins CPL's

    • 426
    • 427
    • 656
    • 1584
    • 1610
    • 1629
    • 2605
    • 8466
    • 8510
    • 8610
    • 8611
    • 8615
    • 8733
    • 40426
    • 40427
    • 40656
    • 41452
    • 41584
    • 41586
    • 41610
    • 41629
    • 42605
    • 42827
    • 43068
    • 43293
    • 43460
    • 43858
    • 43859
    • 43861
    • 43862

    Dynapac

    • SD2500CS - Asphalt Paver
    • CA260PD - Vibratory Compactor
    • CA702PD - Vibratory Compactor
    • CA612PD - Vibratory Compactor
    • CA602PD - Vibratory Compactor
    • CA512PD - Vibratory Compactor
    • CA362PD - Vibratory Compactor
    • CT3000 - Vibratory Compactor
    • CA260D - Vibratory Compactor

    Hyundai

    • HL757-9S
    • HL749-9

    TADANO

    • GR300XL - Rough Terrain Crane
    • 10010MX - Crawler Crane
    • GR350XL-2 - Rough Terrain Crane
    • GR350XL-1 - Rough Terrain Crane

    JCB

    • 427
    • 437
    • 437 ZX

    Ammann - Vibratory Compactors

    • ASC200HD
    • ASC200D
    • ASC250D
    • ASC250HD

    Ingersoll Rand

    • PF6110
    • PF6160
    • PF6170

    Vogele Vision

    • 5100-2
    • 5103-2
    • 5200-2
    • 5203-2

    Svedala Demag

    • DF145CS
    • DF145C

    Skidder

    • 220C - Harvester
    • 230C - Harvester
    • 234 - Harvester
    • T234 - Harvester
    • 250B
    • T250B
    • H250B
    • 604C
    • 610C
    • 620C
    • E625C
    • 718E - Feller Buncher
    • 720E - Feller Buncher
    • 724E - Feller Buncher
    • 726E - Feller Buncher

    Komatsu

    • WA250-6 - Wheel Loader
    • WA250PZ-6 - Wheel Loader
    • WA320-6 - Wheel Loader
    • WA320-6N - Wheel Loader
    • WA320PZ-6 - Wheel Loader
  • 1) Engine O/H Kit
    COK5160/6 Std Click to view kit content
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    Item #:
    Quantity:
    Description:
    C3802070
    1
    BRG, MAIN SET STD 6B
    C3901170
    12
    BRG, CON ROD STD B SERIES
    C3940059
    1
    BUSHING, CAMSHAFT B SERIES
    C4890832
    1
    SEAL, CRANKSHAFT FRONT 4.5 & 6.7
    C4891178
    6
    BUSHING, CON ROD B SERIES
    C4955160
    6
    KIT, PISTON, QSB 4.5/6.7, STD
    C4955229
    1
    GASKET, TOP SET QSB 6.7
    C4955230
    1
    GASKET, BOTTOM SET QSB 6.7
    C4955372
    1
    SEAL CRANKSHAFT REAR 4.5 & 6.7
         COK5481/6 0.50 mm Click to view kit content
    CLOSE
    Item #:
    Quantity:
    Description:
    C3802070
    1
    BRG, MAIN SET STD 6B
    C3901170
    6
    BRG, CON ROD STD B SERIES
    C3940059
    1
    BUSHING, CAMSHAFT B SERIES
    C4890832
    1
    SEAL, CRANKSHAFT FRONT 4.5 & 6.7
    C4891178
    6
    BUSHING, CON ROD B SERIES
    C4893693
    6
    BRG, CON ROD, STD, B SERIES (LOWER)
    C4955229
    1
    GASKET, TOP SET QSB 6.7
    C4955230
    1
    GASKET, BOTTOM SET QSB 6.7
    C4955372
    1
    SEAL CRANKSHAFT REAR 4.5 & 6.7
    C4955481
    6
    KIT, PISTON, QSB 4.5/6.7, 0.50MM
    2) O/H Kit Fractured Rod
    COK5160F/6 Std (3) Click to view kit content
    CLOSE
    Item #:
    Quantity:
    Description:
    C3802070
    1
    BRG, MAIN SET STD 6B
    C3901170
    6
    BRG, CON ROD STD B SERIES
    C3940059
    1
    BUSHING, CAMSHAFT B SERIES
    C4890832
    1
    SEAL, CRANKSHAFT FRONT 4.5 & 6.7
    C4891178
    6
    BUSHING, CON ROD B SERIES
    C4893693
    6
    BRG, CON ROD, STD, B SERIES (LOWER)
    C4955160
    6
    KIT, PISTON, QSB 4.5/6.7, STD
    C4955229
    1
    GASKET, TOP SET QSB 6.7
    C4955230
    1
    GASKET, BOTTOM SET QSB 6.7
    C4955372
    1
    SEAL CRANKSHAFT REAR 4.5 & 6.7
         COK5481F/6 0.50 Click to view kit content
    CLOSE
    Item #:
    Quantity:
    Description:
    C3802070
    1
    BRG, MAIN SET STD 6B
    C3901170
    6
    BRG, CON ROD STD B SERIES
    C3940059
    1
    BUSHING, CAMSHAFT B SERIES
    C4890832
    1
    SEAL, CRANKSHAFT FRONT 4.5 & 6.7
    C4891178
    6
    BUSHING, CON ROD B SERIES
    C4893693
    6
    BRG, CON ROD, STD, B SERIES (LOWER)
    C4955229
    1
    GASKET, TOP SET QSB 6.7
    C4955230
    1
    GASKET, BOTTOM SET QSB 6.7
    C4955372
    1
    SEAL CRANKSHAFT REAR 4.5 & 6.7
    C4955481
    6
    KIT, PISTON, QSB 4.5/6.7, 0.50MM
    3) Engine I/F Kit
    CIK5160/6 Std Click to view kit content
    CLOSE
    Item #:
    Quantity:
    Description:
    C3802010
    1
    BRG, MAIN SET STD 4B
    C4955356
    1
    GASKET, TOP SET QSB 4.5
    C3901170
    12
    BRG, CON ROD STD B SERIES
    C4934344
    1
    GASKET, OIL PAN QSB 6.7
    C4955160
    6
    KIT, PISTON, QSB 4.5/6.7, STD
         CIK5481/6 0.50 mm Click to view kit content
    CLOSE
    Item #:
    Quantity:
    Description:
    C3802010
    1
    BRG, MAIN SET STD 4B
    C4955356
    1
    GASKET, TOP SET QSB 4.5
    C3901170
    12
    BRG, CON ROD STD B SERIES
    C4934344
    1
    GASKET, OIL PAN QSB 6.7
    C4955481
    6
    KIT, PISTON, QSB 4.5/6.7, 0.50 mm
         SPEC SHEET - 6BT 6.7 QSB
  • 1) Piston & Ring Kit
    C4955160 Std C4955481 0.50 mm
    Use 6
  • Main Bearing Set
    C3802070 Std C3802071 0.25 mm C3802072 0.50 mm C3802073 0.75 mm
    Use 1
  • Con Rod Bearing
    C3901170 Std C3901171 0.25 mm C3901172 0.50 mm C3901173 0.75 mm
    Rod bearings are priced and sold per shell
  • Fractured Con Rod Bearing
    C4893693 Std (3) C4892795 0.25 mm C4892796 0.50 mm C4892797 0.75 mm
    Rod bearings are priced and sold per shell
    • Piston Kit:

    1) 1 C4934860 Piston Std,           1 C4955251 Ring Set  Std,             1 C4931041 Piston Pin,   2 C3920691 Ret.

    2) 1 C4934816 Piston 0.50 mm, 1 C4955480 Ring Set  0.50 mm,  1 C4931041 Piston Pin,   2 C3920691 Ret.

  • 1) Front Seal
    C4890832
    2) Rear Seal
    C4955372
    3) Crankshaft, Gear
    C3955151
    4) Crankshaft
    C4934862 (1)
    5) Ring Gear
    C3903309 (173T) (1) C3905427 (127T) (1) C3901774 (159T) (1) C3902127 (138T) (1)
  • 1) Top Gasket Set
    C4955229
    2) Bottom Gsk Set
    C4955230
    3) Head Gasket
    C4932210
    4) Oil Pan Gasket
    C3959797 (5) C4934344 (6)
    5) Valve Cover Gsk
    C4899226
  • 1) Bushing, Piston
    C4891178 x6
    2) Bushing, Cam
    C3940059 x1
    3) Bolt, Con Rod
    C4891179 x12
    4) Con Rod
    C4943979
    5) Bolt, Ex Manifold
    C3944593 (2) C3944655 (4)
    6) Spacer, Ex Manifold
    C3945252
  • 1) Camshaft
    C3979506
    2) Tappet
    C3947759
    3) Rocker Arms
    C3942734 x6 C3942735 x6
    4) Camshaft Gear
    C3955152
  • 1) Oil Cooler 7 Plates
    C3921558
    Oil Cooler 8 Plates
    C3975818
    2) Oil Cooler Gasket
    C3942914
    3) Oil Cooler Gasket Filter Head
    C3942915
    4) Nozzle, Piston Cooling
    C4937308
Valve Section
(1): Check application for proper usage.
(2): Flanged Head Cap Screw.
(3): On Fracture Split Con Rods use: 6 of C3901170 (or O/S) and 6 of C4893693 (or O/S).
(4): Studded Flange Cap Screw.
(5): Paper/composite material
(6): Rubber material