Primary chaincase & screws
For gaskets and fibre washers click here; for wheel adjusters click here, oil click here. See notes under gearbox section (click here) regarding the change to 1956 swinging arm machines if problems are experienced with primary chain alignment. There is not, and never was a gasket under the clutch dome, except for the late W/NG models with the steel primary cases. Nor was there ever any kind of seal behind the clutch; oil is prevented from leaving by a lip around the hole and by the fact that the clutch runs very close to this lip. The competition models did have 2 large felt washers fitted between the inner primary case and the gearbox sprocket to prevent the ingress of mud and water into the chaincase.
Ariel did not specify which case screws went where, so there is an element of trial and error! If you are looking for clutch dome screws only, we have determined they are these – For Singles and twins 3 of 041 and 1 of 017 (from 1936 onwards). For Square Fours 4 of 041 1937-58
Case Screws
We sell case screws in sets or individually, both are listed below and most are available in stainless as well
| Singles | Zinc plated Set No. | Stainless Set No. | Case Screws | ||||||||
| Length | CS00 | 11/16 | 1 3/16 | 2″ | 1″ | 1 3/4 | 3/8 | 13/16 | |||
| 1933-34 Singles | 11 | 1 | |||||||||
| 1935 Singles | 1 | 8 | 3 | 1 | |||||||
| 1936-38 Singles | 1 | 1 | 3 | 6 | 1 | 3 | 1 | ||||
| 1939 OH/OG | 10 | 1 | 1 | ||||||||
| W/NG Steel | 28 | 2 | |||||||||
| 1939-49 Singles | CS11 | CS11Q | 1 | 3 | 6 | 2 | 3 | 1 | |||
| 1950-53 Singles | CS12 | CS12Q | 1 | 5 | 7 | 2 | 3 | ||||
| 1954 VB | 1 | 5 | 7 | 2 | 3 | ||||||
| 1954-55 Singles | CS13 | CS13Q | 1 | 3 | 9 | 1 | 3 | ||||
| 1956-58 Singles | CS14 | CS14Q | 3 | 9 | 1 | 3 | 1 | ||||
| Twins | Zinc plated Set No. | Stainless Set No. | Case Screws | ||||||||
| Length | 11/16 | 1 11/16 | 2″ | 1″ | 1 3/4 | 1 3/8 | 1/2 | 3/8 | 13/16 | ||
| 1948-53 KH | CS15 | CS15Q | 7 | 2 | 3 | 1 | 3 | ||||
| 1954-55 KH | CS16 | CS16Q | 1 | 9 | 1 | 3 | |||||
| 1956-57 KH | CS17 | CS17Q | 3 | 9 | 1 | 1 | 4 | ||||
| 1954-55 FH | CS18 | CS18Q | 1 | 3 | 9 | 1 | 3 | ||||
| 1956-58 FH | CS19 | CS19Q | 3 | 9 | 1 | 1 | 4 | ||||
| Fours | Zinc plated Set No. | Stainless Set No. | Case Screws | |||||||
| Length | 11/16 | 1 11/16 | 1 1/2 | 1 3/16 | 1 3/4 | 1 3/8 | 3/8 | 1 7/16 | ||
| 1932-33 SQ 4 | CS20 | CS20Q | 4 | 6 | 1 | |||||
| 1933-36 SQ 4 | CS21 | CS21Q | 2 | 10 | ||||||
| 1937-58 SQ 4 | CS22 | CS22Q | 9 | 2 | 4 | 1 | ||||
Part No. | Description | Per | Model | Years |
041 | Drain screw, not included in case screw sets | 1 | S/arm | 1954-58 |
049 | Screw, countersunk, battery carrier to primary chaincase | 2 | S/arm | 1954-58 |
0511 | Bolt, inner primary case to gear cover | 3 | SQ 4 | 1937-58 |
0538A | Bolt, inner primary case to gear cover, top | 1 | SQ 4 | 1937-58 |
0604 | Bolt, primary chaincase to frame, Plun/Rig | 1 | Sing/KH | 1935-55 |
0604Q | Bolt, primary chaincase to frame, Plun/Rig, stainless steel | 1 | Sing/KH | 1935-55 |
1545-37 | Dowel for gear cover | 2 | SQ 4 | 1937-58 |
5414-33 | Brake pedal stop plate | 1 | All | 1933-36 |
5700-27 | Primary chainguard | 1 | ABCDE | 1927 |
5700-28 | Primary chaincase, bare steel | 1 | ABCDE | 1928 |
5700-29 | Primary chaincase, bare steel | 1 | ABEFG | 1929-30 |
5700-31 | Primary chaincase, can use 5700-29, which is the same except that this one has inner and oil pipe built in N/A | 1 | Vert Sing | 1931-32 |
5702-28 | Clutch dome, bare steel | 1 | Not Colts | 1928-30 |
5702-31 | Clutch dome, chrome, it was probably only the VH that had a chrome dome, the others using the 5702-28 | 1 | VB/VF/VH | 1931-32 |
5702-36 | Clutch dome, chrome | 1 | Sing | 1936-38 |
5702-39 | Clutch dome, chrome, plunger and rigid | 1 | Sing/twins | 1939-55 |
5702-43 | Clutch dome | 1 | W/NG | 1943-45 |
5702-54 | Clutch dome, chrome | 1 | S/arm | 1954-58 |
5705-37 | Clutch dome, chrome | 1 | SQ 4 | 1937-58 |
5710-36 | Primary chaincase | 1 | Single | 1936-39 |
5710-39U | Primary chaincase, outer | 1 | Single | 1939-54 |
5710-54U | Primary chaincase, outer, swinging arm | 1 | Single | 1954-58 |
5711-36 | Primary chaincase, inner | 1 | Single | 1936-54 |
5711-48UA | Primary chaincase, inner | 1 | KH | 1948-53 |
5712-54 | Primary chaincase, inner | 1 | FH | 1954-55 |
5713-54 | Primary chaincase, inner | 1 | KH | 1954-55 |
5714-33 | Outer primary chaincase | 1 | 4F | 1933-36 |
5714-37U | Primary chaincase, outer | 1 | SQ4 | 1937- |
5715-33 | Inner primary chaincase | 1 | 4F | 1933-36 |
5716-37 | Spacer, chaincase to frame – can use 4720-56 but the wall is a bit thin, best to make your own to suit the gap, which tends to vary, that way the case is not put under any strain. | 1 | SQ 4 | 1937-58 |
5718-37 | Bolt, primary chaincase lower fixing to frame with for brake pedal stop | 1 | SQ | 1937-49 |
5718-51 | Bolt, primary chaincase lower fixing to frame | 1 | SQ 4 | 1950-58 |
5718-51Q | Bolt, primary chaincase lower fixing to frame, SS | 1 | SQ 4 | 1950-58 |
5750-31 | Oil filler cap | 1 | Inclined | 1931-32 |
5750-32 | Oil filler and inspection cap | 1 | All | 1932-58 |
5767-39 | Oil level screw | 1 | All | 1939-58 |
5767-39Q | Oil level screw, stainless steel | 1 | All | 1939-58 |
5770-31 | Adjusting screw for rear chain oiler | 1 | All | 1931-58 |
5770-31Q | Adjusting screw for rear chain oiler, SS | 1 | All | 1931-58 |
5772-31 | Adjusting screw spring for rear chain oiler | 1 | All | 1931-58 |
5854-29 | Oil filler cap, screw type, no lettering, chrome – not correct but fills the hole | 1 | SQ4 | 1931-36 |
No products were found matching your selection, but we still might be able to help! Give us a call on 01986 894798 or email spares@draganfly.co.uk