The Rush SR is designed for longevity, but extended operation requires scheduled replacement of safety-critical and wear components. A warning light is shown every 12,000 mi (approx. 150 hours) to indicate the engine and gearbox should be rebuilt. See dash-alarms.md.
The intervals below assume approximately 8 hours per event.
Fuel lines age out on a schedule of their own, separate from everything below. The
interval and the inspection are in the
Fuel and Fire System TSB.
| Task | Notes |
|---|
| Inspect oil pump, replace if worn | Pull the pump and check the gears and rotor for wear or scoring. Replace it if anything looks marginal. A Check Oil Pump alarm before this interval means inspect now, not at 50 hours. |
| Task | Notes |
|---|
| Replace sprockets | Front and rear go together. Tooth counts and per-track gearing are on Gear Ratios and Sprocket Changes; engine sprocket nut torque is in Torque Specs. |
| Replace master cylinders | Two of them, one per brake circuit, joined by the bias bar. Read the Brake System Upgrade Kit bulletin before you order. Bleed afterward per Inspecting and Bleeding Brakes. |
| Rebuild brake calipers | Four-piston billet calipers, the same unit at all four corners. Same Brake System Upgrade Kit bulletin applies. |
| Replace wheel studs | Studs run dry. No grease, anti-seize, or thread locker, and the lug torque depends on which wheels you have. See Torquing Wheels. |
| Replace ignition coils | — |
| Replace fuel pumps | Confirm pressure after the swap before the car goes out. See Checking Fuel Pressure. |
| Replace fuel cell foam | Inspect the foam for deterioration between changes instead of waiting for the interval. See Fuel Tanks. |
| Replace Gen 1 seat | — |
| Certify fire suppression system | REQUIRED — gauge must be in GREEN before every event. Two bulletins apply: Lifeline Fire Suppression System for the current system, and Fuel and Fire System TSB for the cable inspection. |
| Task | Notes |
|---|
| Replace pedal box | Read the Pedal Box Safety Notice first. It covers a weld repair, and RAW will do the repair or send a new frame. Pulling the master cylinders with the brake lines still attached saves you a brake bleed. |
| Replace Gen 2 seat | — |
| Task | Notes |
|---|
| Rebuild engine | ~$3,500. The dash lights the rebuild warning at this point. |
| Rebuild steering rack | Grease it every season in between. See Each Season. |
| Replace steering quick release | The wear items are the detent balls, the compression spring, and the sleeve. Replace the hub and sleeve as a pair. |
| Replace wheel bearings | Sealed hub assemblies, replaced whole rather than repacked. Inspect them yearly with the lift and rotation tests in Inspecting Wheel Bearings. |
| Task | Notes |
|---|
| Replace driver harness | Inspect before every session for frays, cuts, or damage. Never use a harness with broken or missing buckle pins. |
| Replace fuel cell | Inspect foam baffling regularly for deterioration. Dual fuel tank cars must have only ONE check valve installed. |
