Roadmaster InvisiBrake 8700 is a permanently installed supplemental brake system in the towed vehicle. Its factory component illustration shows the controller, air cylinder, cable and pulley, pedal clamp, wiring harnesses, vacuum plumbing, motorhome monitor and breakaway switch with 24 numbered references.
Original Roadmaster components and installation drawings
The manufacturer diagrams show the components and connection points for this system. Open each PDF for a larger view and the complete service instructions.
InvisiBrake 8700 numbered components and service identifiers
Open the Roadmaster PDF to enlarge the labelled components and connections.
Open invisibrake 8700 numbered components and service identifiers (PDF)
InvisiBrake electrical and taillight wiring layout
Open the Roadmaster PDF to enlarge the labelled components and connections.
Open invisibrake electrical and taillight wiring layout (PDF)
Original Roadmaster parts and reference numbers
These factory references identify the system's original pieces. Unlinked entries are not represented as individually stocked NewRVParts replacement parts.
| Reference | Roadmaster number | Component | Shop |
|---|---|---|---|
| 1 | 945201-00 | Complete InvisiBrake controller | |
| 2 | 452109-30 | Brake cable and spring only | |
| 3 | 452109-20 | Air cylinder with fitting | |
| 4 | 452104-10 | Pulley | |
| 5 | 452140-00 | Cable anchor bracket | |
| 6 | 945202-00 | Brake pedal clamp and mounting hardware | |
| 7 | 450008 | Monitor-wire patch cord | |
| 8 | 450008-15 | 15-foot towed-car monitor wire | |
| 9 | 450008-50 | 50-foot motorhome monitor wire | |
| 10 | 945203-00 | Four-wire harness for breakaway, power and ground | |
| 11 | 8602 | Breakaway activation cable | |
| 12 | 650898 | Breakaway switch and pin | |
| 12 spare | 200200-20 | Breakaway pin only | |
| 13 | 300065-00 | Motorhome LED monitor | |
| 14 | 9325 | Audio signal circuit board | |
| 15 option | 452141 | 3/8-inch vacuum check valve | |
| 15 option | 452142 | 1/2-inch vacuum check valve | |
| 16 | 450701 | 1/8-inch air line, not pictured | |
| 17 | 450700 | 1/4-inch nylon vacuum line, not pictured | |
| 18 | 452111 | 1/4-inch rubber vacuum hose, one foot | |
| 19 | 452137 | 3/8-inch rubber vacuum hose | |
| 20 | 452136 | 1/2-inch rubber vacuum hose | |
| 21 | 452118 | 3/8-inch vacuum-line tee | |
| 22 | 452116 | 1/2-inch vacuum-line tee | |
| 23 | 452154-00 | 5/8-inch vacuum-line tee, separately sold | |
| 24 | 945204-00 | Four-wire flat towed-lighting harness with six-pin plug | |
| System | 8700 | Complete InvisiBrake kit available at NewRVParts | View exact part |
| Transfer kit | 98700 | New-vehicle installation parts; not a second controller | View exact part |
| Motorhome kit | 98850 | Second-coach monitor and audible alarm only | View exact part |
Related NewRVParts products with photographs
Check each product's full manufacturer number and package contents. Complete systems, transfer kits, motorhome accessories and individual service parts are sold in different configurations.
Confirm the correct braking system
The 8700 complete system is different from reinstallation kit 98700 and second-motorhome monitor kit 98850. The new-car kit does not include a second complete controller, air cylinder or cable assembly. Verify the towed vehicle against Roadmaster's current application guide; standard hydraulic hydroboost systems without powered assist during towing are not supported by the documented instructions.
Find Roadmaster's current installation and service manuals