The Scott Bonnar Supercut parts list, covering ten model numbers in 18-inch, 20-inch and 24-inch cutting widths. The full chassis components list is transcribed below with every part number, alongside the component illustrations, model-numbering notes, drum clutch adjustment instructions and the petrol engine tables.
- Models170018, 170026, 170034, 170042, 170317, 170325, 170675, 170683, 170691, 170704 (18″, 20″, 24″)
- Pages17
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Full parts list (text)
The Chassis Components Parts List for the Scott Bonnar Supercut, covering illustration numbers 1–163. The Illus. No. column refers to the chassis components illustrations in the viewer above.
This list covers ten Supercut model numbers: 170018, 170026, 170034, 170042, 170317, 170325, 170683, 170675, 170691 and 170704, in 18″, 20″ and 24″ cutting widths. Where a part differs by width the size is given in the description, so match the size to your machine.
Several parts changed partway through production. Those are listed twice — to Machine No. 1707169 and from Machine No. 1707170 — and the cutter bearing, counter shaft bearing, drum shaft bearing and seal collars all differ across that split. Check the number on your machine plate before ordering any of them.
Illustration nos. 1–44 — sideframes, front roller, cutter and soleplate
| Illus. No. | Description | Part No. |
|---|---|---|
| 1 | L.H. Sideframe (cast iron) | 171109 |
| 1 | L.H. Sideframe (aluminium) | 174852 |
| 2 | R.H. Sideframe (cast iron) | 171117 |
| 2 | R.H. Sideframe (aluminium) | 174860 |
| 3 | Front Roller 18″ | 171133 |
| 3 | Front Roller 20″ | 171141 |
| 3 | Front Roller 24″ | 175556 |
| 4 | Front Roller L.H. quad. assy. | 176030 |
| 5 | Front Roller R.H. quad. assy. | 176049 |
| 6 | Front Roller Bearing — to Machine No. 1707169 | 1122225 |
| 6 | Front Roller Bearing — from Machine No. 1707170 | 1122028 |
| 7 | Grease Nipple (Straight) | 1792013 |
| 8 | Grease Nipple (Angled 45°) | 1793057 |
| 9 | Front Roller Bearing Washer | 171248 |
| 10 | Front Roller Felt Washer | 171256 |
| 11 | Bolt Hexagon 1″ x 5/16″ UNF | 1212761 |
| 12 | Nut Hexagon 5/16″ UNF | 2321180 |
| 13 | Front Roller scraper 18″ | 172435 |
| 13 | Front Roller scraper 20″ | 172443 |
| 13 | Front Roller scraper 24″ | 176970 |
| 14 | Screw Hexagon ½″ x ¼″ BSW. | 3141904 |
| 15 | Washer Bright ¼″ | 3651164 |
| 16 | Staybar 18″ | 171264 |
| 16 | Staybar 20″ | 171272 |
| 16 | Staybar 24″ | 175572 |
| 17 | Bolt Hexagon 1¼″ x 5/16″ UNF | 1213280 |
| 17A | Hexagon Bolt 1¼″ x 5/16″ BSW | 1183288 |
| 18 | Washer Bright 5/16″ x ¾″ O.D. | 3659003 |
| 19 | Spring Washer 5/16″ | 3661186 |
| 20 | 18″ x 6 Blade Cutter assy. (as requested) | 175417 |
| 20 | 18″ x 8 Blade Cutter assy. | 171280 |
| 20 | 18″ x 10 Blade Cutter assy. (as requested) | 174211 |
| 20 | 20″ x 6 Blade Cutter assy. (as requested) | 174828 |
| 20 | 20″ x 8 Blade Cutter assy. | 171301 |
| 20 | 20″ x 10 Blade Cutter assy. | 174220 |
| 20 | 20″ x 12 Blade Cutter assy. (Rev.) | 174810 |
| 20 | 24″ x 6 Blade Cutter assy. | 178052 |
| 20 | 24″ x 8 Blade Cutter assy. | 175580 |
| 20 | 24″ x 10 Blade Cutter assy. | 175599 |
| 21 | Cutter Bearing Hsng. | 171328 |
| 22 | Cutter Bearing — to Mach. No. 1707169 | 1123320 |
| 22 | Cutter Bearing — from Mach. No. 1707170 | 1126336 |
| 23 | Cutter Brng. Seal Collar — to Mach. No. 1707169 | 171336 |
| 23 | Cutter Brng. Seal Collar — from Mach. No. 1707170 | 171969 |
| 24 | Cutter Brng. Spacer Washer | 171344 |
| 25 | Cutter Brng. Dust Washer | 171352 |
| 26 | Cutter Adj. Screw Purchase Block | 171360 |
| 27 | Hexagon Set Screw 1¾″ x 3/8″ BSW | 3144345 |
| 28 | Bright Washer 3/8″ | 3651209 |
| 29 | Spring | 133081 |
| 30 | Cutter Hsng. Adj. Sleeve | 171379 |
| 31 | R.H. Brng. Hsng. Side Plate | 171387 |
| 32 | Hexagon Bolt 1½ x 5/16″ BSW. | 1183804 |
| 33 | Hexagon Set Screw ¾″ x 5/16″ BSW | 3142305 |
| 34 | Cutter Sprocket 11T | 171395 |
| 35 | Cutter Brng. Locknut | 171416 |
| 36 | Cutter Chain | 2985516 |
| 37 | Cutter Chain Adjuster | 171424 |
| 38 | 18″ Low Lip Bottom Blade | 391814 |
| 38 | 18″ Low Cut Bottom Blade (as requested) | 391806 |
| 38 | 20″ Low Lip Bottom Blade | 392024 |
| 38 | 20″ Low Cut Bottom Blade | 392008 |
| 38 | 24″ Low Lip Bottom Blade | 392420 |
| 38 | 24″ Low Cut Bottom Blade | 392438 |
| 39 | 18″ Sole Plate | 171459 |
| 39 | 20″ Sole Plate | 171467 |
| 39 | 24″ Sole Plate | 175610 |
| 40 | Bottom Blade Screw Kit | 5001230 |
| 41 | Sole Plate Mntg. Bolt | 171475 |
| 42 | 18″ Deflector assy. compl. | 171483 |
| 42 | 20″ Deflector assy. compl. | 171619 |
| 42 | 24″ Deflector assy. compl. | 175628 |
| 43 | 18″ Deflector Plate assy. | 171491 |
| 43 | 20″ Deflector Plate assy. | 171627 |
| 43 | 24″ Deflector Plate assy. | 175636 |
| 44 | L.H. Endplate assy. | 171555 |
Illustration nos. 45–110 — endplates, counter shaft, gear cover and drum clutch
| Illus. No. | Description | Part No. |
|---|---|---|
| 45 | R.H. Endplate assy. | 171600 |
| 46 | End Plate | 171563 |
| 47 | End Plate Stud assy. | 171571 |
| 48 | End Plate Stud Retainer | 2501010 |
| 49 | Deflector Adjusting Arm | 171547 |
| 50 | Adjusting Arm Retainer Speed Nut 49848-2 | 2501070 |
| 51 | Hexagon Set Screw ½″ x ¼″ UNF | 3181906 |
| 52 | Counter Shaft L.H. Brng. Hsng. | 176727 |
| 53 | Counter Shaft L.H. Brng. Hsng. Bolt 2¼″ x 5/16″ UNF | 1225017 |
| 54 | Counter Shaft L.H. Brng. Spacer | 163811 |
| 55 | Counter Shaft R.H. Brng. Hsng | 171651 |
| 56 | Hexagon Bolt 1¼″ x ¼″ UNF | 1213264 |
| 57 | Hexagon Nut ¼″ UNF | 2321163 |
| 58 | Spring Washer ¼″ | 3661160 |
| 59 | Locknut | 171660 |
| 60 | Locknut Washer | 171678 |
| 61 | Counter Shaft Gear 15T | 171686 |
| 62 | Woodruff Key No. 9 | 3802267 |
| 63 | Counter Shaft R.H. Brng. Lock Collar | 177017 |
| 64 | Counter Shaft Bearing — to Machine No. 1707169 | 1122327 |
| 64 | Counter Shaft Bearing — from Machine No. 1707170 | 1122036 |
| 65 | Counter Shaft Sealing Washer L.H. Only | 171707 |
| 66 | Counter Shaft Bearing and Housing 24″ R.H. | 1721037 |
| 67 | Counter Shaft Bearing and Housing Bolt R.H. 1¼″ x 3/8″ UNF | 1213309 |
| 68 | Hexagon Nut 3/8″ UNF | 2321208 |
| 69 | Counter Shaft Bearing and Housing Washer 3/8″ | 3711208 |
| 70 | Counter Shaft R.H. Brng. Bracket | 177762 |
| 71 | Gear Cover Case | 171715 |
| 72 | Gear Cover Case Knob | 171723 |
| 73 | Gear Cover Front Stud | 171731 |
| 74 | Washer 3/8″ Bright | 3651209 |
| 75 | Gear Cover Rear Stud | 171740 |
| 76 | Drumclutch Spindle Thrust Washer | 171758 |
| 77 | Drumclutch Spindle | 171766 |
| 78 | Drumclutch Spindle Washer 5/8″ Bright | 3651260 |
| 79 | Gear Carrier Clutch Plate with Bush | 171774 |
| 80 | Clutch Plate Bush | 171790 |
| 81 | Clutch Plate Lining | 171803 |
| 82 | Clutch Plate Rivet | 2961016 |
| 83 | Spring Holder Clutch Plate | 171811 |
| 84 | Inter. Gear With Bush 56 Teeth | 172072 |
| 85 | Inter Gear Bush | 172216 |
| 86 | Inter. Gear 32 Teeth | 172099 |
| 87 | Drum Clutch Spring | 172101 |
| 88 | Clutch Spring Bolt | 172110 |
| 89 | Clutch Spring Pin | 172128 |
| 90 | Pin Cotter 3/8″ x 1/16″ | 3321492 |
| 91 | Clutch Thrust Plate | 172136 |
| 92 | Clutch Thrust Plate Screw CH.H.D. ½ x 3/16 | 2061886 |
| 93 | Clutch Thrust Plate Washer 3/16 Spring | 3661129 |
| 94 | Clutch Thrust Pin | 172160 |
| 95 | Clutch Pin Lever Pivot Block | 172179 |
| 96 | Pivot Block Screw Set Screw ¾″ x ¼″ BSW | 3142287 |
| 97 | Clutch Pin Lever | 172195 |
| 98 | Clutch Pin Pivot | 172128 |
| 99 | Clutch Pin Lever Adj. Screw | 172224 |
| 100 | Clutch Rod | 172232 |
| 101 | Hexagon Nut ½″ UNF | 2321242 |
| 102 | Clutch Rod Handle | 172240 |
| 103 | Clutch Rod Handle Tube | 172259 |
| 104 | Drum Clutch Rod Guide | 172267 |
| 105 | Hexagon Bolt 1¾″ x 5/16″ BSW | 1184327 |
| 106 | Handle Knob | 2881016 |
| 107 | Clutch Rod Guide Mntg. Clamp | 172275 |
| 108 | 18″ Drumshaft | 172283 |
| 108 | 20″ Drumshaft | 172291 |
| 108 | 24″ Drumshaft | 178079 |
| 109 | 18″ Drum with Bush | 176823 |
| 109 | 20″ Drum with Bush | 176831 |
| 109 | 24″ Drum with Bush | 176840 |
| 109 | 20″ Drum with Bush — Aluminium | 174836 |
| 110 | 18″ Drum Bush & Ratchet Box Bush | 1771146 |
| 110 | 20″ Drum Bush & Ratchet Box Bush | 1771162 |
Illustration nos. 110–163 — ratchet boxes, drums, grass box, toolbox and clutch
| Illus. No. | Description | Part No. |
|---|---|---|
| 110 | 24″ Drum Bush & Ratchet Box Bush | 3111255 |
| 111 | 24″ Centre Drum | 178060 |
| 112 | Screw ¾″ x 5/16″ C.P.C.H. BSW | 3162306 |
| 113 | Screw Lock Nut 5/16″ BSW | 2481183 |
| 114 | 18″ Ratchet Box with Bush | 171070 |
| 114 | 20″ Ratchet Box with Bush | 171088 |
| 114 | 24″ Ratchet Box with Bush | 175695 |
| 115 | Ratchet Box Screw — 18″ from Mach. 1707215, 20″ from Mach. 1707265, 24″ from Mach. 1707092 | 3511025 |
| 116 | Ratchet Box Bolt ¾″ x ¼″ UNF | 3182289 |
| 117 | Ratchet Box Nut ¼″ UNF | 2321163 |
| 118 | Ratchet Box Washer Shakeproof ¼″ (Int.) | 3691166 |
| 119 | 18″ Drum Shaft Sleeve | 172320 |
| 119 | 20″ & 24″ Drum Shaft Sleeve | 172339 |
| 120 | 18″ Pawl Holder — from Machine No. 1705780 | 172355 |
| 120 | 20″ Pawl Holder — from Machine No. 1705780 | 172371 |
| 120 | 24″ Pawl Holder | 301196 |
| 121 | Drum Pawl — from Machine No. 1705780 | 333024 |
| 122 | 18″ Drum Collar | 172347 |
| 122 | 20″ Drum Collar | 172363 |
| 122 | 24″ Drum Collar | 175740 |
| 123 | Drum Collar Screw 7/8″ x 3/8″ CPCH BSW | 3162546 |
| 124 | Collar Screw Lock Nut 3/8″ BSW | 2481201 |
| 125 | Drum Gear 40T | 172380 |
| 126 | Drum Shaft Washer 5/8″ | 3661265 |
| 127 | Drum Shaft L.H. Bearing Hsng. 18″ | 177084 |
| 127 | Drum Shaft L.H. Brng. Hsng. 20″ & 24″ | 177105 |
| 128 | Drum Shaft R.H. Brng. Hsng. 20″ & 24″ | 175089 |
| 128 | Drum Shaft R.H. Brng. Hsng. 20″ & 24″ — from Machine No. 1707170 | 176760 |
| 129 | Drum Shaft Bearings (Sealed) — to Mach. No. 1707169 | 1123320 |
| 129 | Drum Shaft Bearing (Open) — from Machine No. 1707170 | 1123039 |
| 130 | L.H. Bearing Retainer | 1502474 |
| 131 | Bearing Hanger Washer R.H. | 172400 |
| 132 | Bearing Hsng. Bolt 1¼″ x 5/16″ UNF | 1223013 |
| 133 | Grass Box assy. 18″ | 172478 |
| 133 | Grass Box assy. 20″ | 172486 |
| 133 | Grass Box assy. 24″ | 175759 |
| 134 | Grass Box Clips L.H. | 172689 |
| 135 | Grass Box Clips R.H. | 172697 |
| 136 | Grass Box Clips Rivet | 2921882 |
| 137 | Support Block Pads | 164275 |
| 138 | Grass Box Stay Rod 18″ | 172769 |
| 138 | Grass Box Stay Rod 20″ | 172777 |
| 138 | Grass Box Stay Rod 24″ | 175812 |
| 139 | Toolbox | 175548 |
| 140 | Toolbox Clamp | 2831114 |
| 141 | Toolbox Mntg. Screw 3/8″ x 3/16″ CH.H.D. BSW | 2061567 |
| 142 | Toolbox Mntg. Nut 3/16″ BSW | 2481126 |
| 143 | Toolbox Mntg. Washer 3/16 | 3691125 |
| 144 | Tubular Handle assy. 18″ | 172814 |
| 144 | Tubular Handle assy. 20″ | 172822 |
| 144 | Tubular Handle assy. 24″ | 175820 |
| 145 | Tube Handle Mntg. Clamp | 172873 |
| 146 | Handle Clamp Bolt 1½″ x ¼″ UNF | 1213780 |
| 147 | Clutch shoe assy. 18″ x 20″ | 172970 |
| 147 | Clutch Shoe assy. 24″ | 177893 |
| 148 | Clutch Lining 18″ & 20″ | 172996 |
| 149 | Clutch Lining Rivet ½″ x 5/32″ | 2951870 |
| 150 | Clutch Lining Rivet 5/8″ x 5/32″ | 2952058 |
| 151 | Clutch Spring | 173235 |
| 152 | Clutch Finger | 173243 |
| 153 | Clutch Finger Adj. Screw | 173016 |
| 154 | Clutch Finger Pivot Pin | 173251 |
| 155 | Clutch Ramp | 173260 |
| 156 | Clutch Ramp Stop Collar | 173278 |
| 157 | Stop Collar Screw ½″ x 5/16″ CP C.H. | 3161921 |
| 158 | Clutch Drum | 173286 |
| 159 | Clutch Sprocket 17 Teeth | 173294 |
| 160 | Cutter Clutch Drum Oil Seal | 2731034 |
| 161 | Clutch Spacer Washer | 173307 |
| 162 | Clutch Fork assy. | 173315 |
| 163 | Clutch Fork Pivot Bolt 2½″ x 3/8″ BSW | 1185387 |
Transcribed from the original Scott Bonnar Supercut parts list. The scanned pages in the viewer above are the authoritative source — if a number matters for an order, check it against the scan.
About the model grid: the printed list carries a ten-column grid marking which of the ten model numbers each part fits. That grid is reproduced in the page images above but is deliberately not re-typed here — a wall of tick marks cannot be proof-read the way a part number can, and for the parts that genuinely differ the cutting width is already stated in the description. Use the description to match your machine’s width, and the scan if you need to confirm a specific model number.
Also in this document: the later pages carry a separate typewritten engine section covering the petrol models (Villiers 412 H/2, 412 H/2RG, 415 HOV/RG and the Scott Bonnar 202 engine) for model numbers 170229 through 170667, plus notes on model numbering and drum clutch adjustment. Those pages are all reproduced in the viewer above.