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Frame Undercarriage SMX 45

Find replacement frame and undercarriage components for pallet jacks, walkie stackers, and forklifts — the structural chassis parts that support the load-bearing and drive systems of your equipment. Our Frame Undercarriage collection covers fork assemblies, chassis components, undercarriage brackets, and structural hardware for the most common material handling equipment in service today.

Compatible equipment brands include Crown, Yale, Hyster, Toyota, BT Prime Mover, Raymond, and other major OEM and aftermarket manufacturers. Frame and undercarriage parts are matched by equipment make, model, and serial number range for verified fitment.

Parts categories available:

  • Fork Assemblies — complete fork sets and individual fork tines for pallet jacks and forklifts
  • Chassis Brackets & Mounts — structural brackets for motor, battery, and component mounting
  • Undercarriage Plates & Guards — floor plates, belly guards, and undercarriage protection panels
  • Pivot Pins & Bushings — structural pivot hardware for fork and frame articulation points
  • Frame Weldments — replacement frame sections for structural repairs

How to identify the right frame part: Note your equipment's make, model, and serial number from the data plate. Frame and undercarriage parts are highly model-specific — always cross-reference with your OEM parts manual or contact our team with your serial number for a verified fitment recommendation.

With 440+ frame and undercarriage SKUs in stock, most parts ship same or next business day from our US warehouse.

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  • PR 49910-05, Bearing
    Up to $0.55 off

    PR 49910-05

    $2.06
    $2.06 $2.61
  • PR 313185-000, Load Wheel Axle, Cold Storage
    Up to $15.14 off

    PR 313185-000

    $26.17
    $26.17 $41.31
  • PR 313948-000, Axle Screw
    Up to $0.29 off

    PR 313948-000

    $1.85
    $1.85 $2.14
  • PR 313958-000, Bearing
    Up to $0.39 off

    PR 313958-000

    $2.59
    $2.59 $2.98
  • PR 313947-000, Nut
    Up to $0.18 off

    PR 313947-000

    $0.74
    $0.74 $0.92
  • PR 312672-000, Bushing
    Up to $0.18 off

    PR 312672-000

    $8.72
    $8.72 $8.90
  • PR 312666-000, Pin for BT Prime Mover SMX 45
    Up to $14.65 off

    PR 312666-000

    $65.89
    $65.89 $80.54

  • PR 312666-001

    Call for Price

  • PR 312651-005

    Call for Price
  • PR 312651-002, Pin
    Up to $3.73 off

    PR 312651-002

    $24.21
    $24.21 $27.94

  • PR 312651-004

    Call for Price

  • PR 312651-003

    Call for Price
  • PR 312651-001, Pin
    Up to $6.29 off

    PR 312651-001

    $7.79
    $7.79 $14.08
  • PR 312638-000, Wheel Fork
    Up to $9.70 off

    PR 312638-000

    $63.04
    $63.04 $72.74
  • PR 312651-000, Pivot Pin
    Up to $6.09 off

    PR 312651-000

    $24.09
    $24.09 $30.18
  • PR 311390-000, Grease Fitting
    Up to $0.11 off

    PR 311390-000

    $0.71
    $0.71 $0.82
  • PR 312636-000, Load Wheel, Poly 95A
    Up to $3.91 off

    PR 312636-000

    $25.41
    $25.41 $29.32
  • PR 301740-003, Set Screw
    Up to $0.47 off

    PR 301740-003

    $0.57
    $0.57 $1.04

Frame Undercarriage SMX 45 — fitment by model

Fits models Part # Wheel size Bore Price
SMX 45 Walkie Pallet Truck PR 49910-05 — — $2.06
SMX 45 PR 313185-000 — — $26.17
SMX 45 Walkie Pallet Truck PR 313948-000 — — $1.85
SMX 45 Walkie Pallet Truck PR 313958-000 — — $2.59
SMX 45 Walkie Pallet Truck PR 313947-000 — — $0.74
SMX 45, SMX 45 Walkie Pallet Truck PR 312672-000 — — $8.72
SMX 45 PR 312666-000 — — $65.89
SMX 45 Walkie Pallet Truck PR 312666-001 — — Call
SMX 45 Walkie Pallet Truck PR 312651-005 — — Call
SMX 45 PR 312651-002 — — $24.21
SMX 45 Walkie Pallet Truck PR 312651-004 — — Call
SMX 45 Walkie Pallet Truck PR 312651-003 — — Call
SMX 45 Walkie Pallet Truck PR 312651-001 — — $7.79
SMX 45 PR 312638-000 — — $63.04
SMX 45 PR 312651-000 — — $24.09
SMX 45 Walkie Pallet Truck PR 311390-000 — — $0.71
SMX 45 PR 312636-000 3.25" × 4.5" — $25.41
SMX 45 Walkie Pallet Truck PR 301740-003 — — $0.57

Not sure which fits? Call 1-800-669-7554.