Dayton 4YX97 Hydraulic Unit
  • ML B146, Ball
    Up to $0.75 off
    1

    ML B146

    $1.99
    $1.99 $2.74
  • ML B145, Wiper
    Up to $3.21 off
    2

    ML B145

    $8.95
    $8.95 $12.16
  • ML B144, O-Ring
    Up to $1.68 off
    3

    ML B144

    $4.25
    $4.25 $5.93
  • ML B152, Piston Rod
    Up to $10.07 off
    4

    ML B152

    $60.00
    $60.00 $70.07
  • ML B143, Cylinder Cap
    5

    ML B143

    Call for Price
  • ML B142, O-Ring
    Up to $0.97 off
    6

    ML B142

    $2.76
    $2.76 $3.73
  • ML B147, Pump Piston
    Up to $3.15 off
    8

    ML B147

    $20.47
    $20.47 $23.62
  • ML B141, U-Cup
    Up to $0.53 off
    7

    ML B141

    $13.31
    $13.31 $13.84
  • ML B148, Washer
    Up to $1.15 off
    9

    ML B148

    $1.37
    $1.37 $2.52
  • ML B149, Spring
    Up to $2.64 off
    10

    ML B149

    $8.12
    $8.12 $10.76
  • ML B150, Wiper
    Up to $1.97 off
    11

    ML B150

    $6.33
    $6.33 $8.30
  • ML B151, U-Cup
    12

    ML B151

    $7.71
    $7.71 $4.95
  • ML B115
    Up to $3.25 off
    13

    ML B115

    $8.48
    $8.48 $11.73
  • ML B117, Cotter Pin
    13

    ML B117

    $0.60
    $0.60 $0.57
  • ML B118, Handle Pivot Pin
    Up to $2.26 off
    14

    ML B118

    $3.84
    $3.84 $6.10
  • ML B126, Snap Ring
    15

    ML B126

    $1.99
    $1.99 $1.97
  • ML B127, Screw Plug
    Up to $0.87 off
    16

    ML B127

    $4.83
    $4.83 $5.70
  • DA BP 100-97
    17

    DA BP 100-97

    $154.00
    $154.00
  • ML B140, Lever Plate Bolt
    Up to $0.22 off
    18

    ML B140

    $0.65
    $0.65 $0.87
  • ML B119, Screw Plug
    Up to $1.92 off
    19

    ML B119

    $12.48
    $12.48 $14.40
  • ML B120, Copper Washer
    20

    ML B120

    $4.42
    $4.42 $4.38
  • ML B121, Spring
    Up to $0.29 off
    21

    ML B121

    $1.28
    $1.28 $1.57
  • ML B122, Spindle of Damping Valve
    Up to $1.02 off
    22

    ML B122

    $6.60
    $6.60 $7.62
  • ML B123, Seat of Damping Valve
    Up to $0.44 off
    23

    ML B123

    $2.87
    $2.87 $3.31
  • ML B124, Steel Ball
    Up to $0.87 off
    24

    ML B124

    $0.83
    $0.83 $1.70
  • ML B153, Retaining Ring
    Up to $0.29 off
    25

    ML B153

    $0.52
    $0.52 $0.81
  • ML B128, Spring
    Up to $0.61 off
    26

    ML B128

    $2.32
    $2.32 $2.93
  • ML B129, Release Pin
    Up to $1.21 off
    27

    ML B129

    $4.77
    $4.77 $5.98
  • ML B130, O-Ring
    28

    ML B130

    $1.21
    $1.21 $1.19
  • ML B131, Sleeve
    Up to $1.72 off
    30

    ML B131

    $7.93
    $7.93 $9.65
  • ML B132, O-Ring
    Up to $0.70 off
    31

    ML B132

    $1.64
    $1.64 $2.34
  • ML B133, Set Screw
    Up to $0.26 off
    34

    ML B133

    $0.33
    $0.33 $0.59
  • ML B135, Lever Plate
    Up to $2.61 off
    32

    ML B135

    $12.57
    $12.57 $15.18
  • ML B134, Nut
    Up to $0.27 off
    33

    ML B134

    $0.21
    $0.21 $0.48
  • ML B139, Steel Ball
    Up to $1.54 off
    35

    ML B139

    $0.88
    $0.88 $2.42
  • ML B138, Ball Valve Seat
    36

    ML B138

    $20.07
    $20.07 $15.43
  • ML B137, Spring
    37

    ML B137

    $10.17
    $10.17 $8.26
  • ML B136, Bolt
    38

    ML B136

    $23.67
    $23.67 $20.92
  • ML B44, Nut
    Up to $0.13 off
    40

    ML B44

    $0.44
    $0.44 $0.57
  • ML B2, Steer Wheel Axle
    Up to $4.48 off
    41

    ML B2

    $13.55
    $13.55 $18.03
  • ML B8, Steer Wheel Assembly, Poly on Nylon Hub
    Up to $13.04 off
    42

    ML B8

    $34.48
    $34.48 $47.52
  • GWK-BF-CK, Complete Wheel Kit, (2) Ultra-Poly Load Roller Assemblies (70D), (2) Poly Steer Wheel Assemblies, W/ Bearings, Axles and Fasteners
    Up to $44.74 off
    42

    GWK-BF-CK

    $100.23
    $100.23 $144.97
  • ML B008-D, Steer Wheel Assembly, Red Poly/Aluminum Hub(Includes 28 , 30 & 31)
    Up to $17.86 off
    42

    ML B008-D

    $57.57
    $57.57 $75.43
  • ML B10, Half Cirque
    Up to $0.38 off
    44

    ML B10

    $0.73
    $0.73 $1.11
  • ML B11, Washer
    Up to $0.15 off
    45

    ML B11

    $0.96
    $0.96 $1.11
  • ML B12, Retaining Ring
    Up to $0.19 off
    46

    ML B12

    $0.59
    $0.59 $0.78
  • ML B13, Dust Cover
    Up to $1.74 off
    47

    ML B13

    $1.64
    $1.64 $3.38
  • ML B4, Thrust Bearing
    Up to $9.02 off
    48

    ML B4

    $9.48
    $9.48 $18.50

Using this diagram

The exploded view above shows the hydraulic unit for the Dayton 4YX97. Each callout number corresponds to a component listed below it — find your part on the drawing, then match the number to the listing to get the current part number and price.

Ordering the right part

  • Individual components — seals, o-rings, pins and springs are listed separately
  • Seal kits — if more than one seal is weeping, a seal kit is usually cheaper than buying the parts individually
  • Complete units — where a pump body is scored or cracked, replacing the unit is often more economical than rebuilding it

Not sure it matches?

Check the number stamped on the hydraulic unit itself against the drawing. If it does not match, call 1-800-669-7554 — we can identify the unit from a photograph.

Related: Dayton parts · Dayton 4YX97 frame diagram