Barker's 24140 Auto-Drain is the 1½-inch electric actuator version for compatible Valterra or Bristol waste slide valves. Its exploded drawing keeps the motor, rack gear, bracket, control switch and connection hardware identifiable without confusing them with the larger 3-inch actuator.
Barker original numbered exploded parts drawing and wiring
Open the manufacturer's PDF to enlarge the drawing and read the original hardware, model and component information.
Original component numbers by diagram callout
The table lists original Barker references for identification. Unlinked items are not presented as available replacement products.
| Callout / category | Barker number | Component |
|---|---|---|
| 1 | 31919 | Machined 1½-inch base |
| 2 | 24136 | 1½-inch rack gear |
| 4 | 25011 | 1½-inch Auto-Drain label |
| 5 | 25364 | 1½-inch warning/serial label |
| 3 | 26876 | Machined cover |
| 6 | 24134 | Drive gear |
| 7 | 24122 | Motor box assembly |
| 8 | 30992 | Spacer |
| 9 | 610-0006 | 5/16-20 hex nut |
| 10 | 30993 | Universal mounting bracket |
| 11 | 605-0007 | #4-24 machine screws (four) |
| 12 | 601-1006 | #10-32 by 1.12-inch screws (two) |
| 13 | 80225 | Washer |
| 14 | 611-2100 | #10-32 locknuts (two) |
| 15 | 634-1250 | E-ring |
| 16 | 24749 | Drive shaft |
| 17 | 30376 | Cams (two) |
| 18 | 738-0055 | Microswitch |
| 19 | 602-0002 | #4-40 screws (two) |
| 20 | 80209 | Mounting washers (two) |
| 21 | 31478 | Connector assembly |
| 22 | 12819 | Strain relief |
| 23 | 31471 | Rocker-switch box |
| 24 | 606-0002 | #6 screws |
| 25 | 738-0007 | Rocker switch |
| 26 | 31479 | Switch-box lamp assembly |
| 27 | 600-0077 | Hex bolt |
| 28 | 27129 | Patent label |
| 29 | 28429 | Plate support |
| 30 | 23087 | Box label |
| 31 | 25476 | Warning label |
| 32 | 31477 | Male connector assembly |
| 33 | 31855 | In-line fuse assembly |
| 34 | 80209 | Switch-box washers |
| 35 | 31472 | Complete switch-box assembly |
| 36 | 17311 | Strain relief |
| 37 | 743-0016 | Wire strain relief |
| 38 | 742-0051 | Terminals (two) |
| 39 | 23136 | 24-inch black wire |
| 40 | 23137 | 24-inch white wire |
| Not drawn | 24006 | Switch-box cover |
NewRVParts product photographs
The following photos identify complete Barker units currently listed on NewRVParts. Interior components may be separate service items.
Confirm the original model
The 1½-inch model uses machined base 31919, rack gear 24136 and identifying label 25011. These are different original parts from the 3-inch Auto-Drain. The electrical controls are documented in the same installation manual, but that does not make the mechanical bases and rack gears interchangeable.