Brakes & Wheels
ATA Chapter 61 — N720AK Systems Reference
Overview
N720AK has a fixed tricycle landing gear with hydraulic disc brakes on the main wheels, operated by toe pedals on both pilot and co-pilot rudder pedals. The aircraft uses Royco 782 (MIL-PRF-83282) hydraulic fluid — not standard automotive brake fluid.
Components
| Component | Part Number | Supplier | Notes |
|---|---|---|---|
| Brake calipers | Hydraulic disc | ||
| Master cylinders | Pilot and co-pilot toe pedals | ||
| Brake fluid | Royco 782 | — | MIL-PRF-83282 |
| Main wheels | WHLWI600XLT-2 | Matco | WI600 series wheels & brakes |
| Nose wheel | AV-VANS-102-01 | Beringer | Beringer nosewheel (from finishing kit). Key parts: AV-VANS-004, JB-01, PAA02, AV-VANS-010. See assembly drawing. |
| Main tires | Desser | Retreads (no inner tubes) | |
| Nose tire | |||
| Wheel fairings | Main gear only | ||
| Axle extenders | RVAE10 (VAE10/RVbits) | Cleaveland Tool | Wheel pant axle extenders (pair). AN5-6A bolts, torque 100 in-lbs. See installation guide. |
| Wheel fairing spacers | WFSPCR | Planearound | Bracket spacers for wheel fairings |
How It Works
Brake System
Hydraulic disc brakes operated by toe pedals. Both pilot and co-pilot have independent toe brakes on their rudder pedals.
Critical: Use only Royco 782 (MIL-PRF-83282) hydraulic fluid. Do not use automotive brake fluid — it will damage the seals.
Landing Gear
Fixed tricycle configuration:
- Steerable nose wheel
- Main gear legs (steel)
- Wheel fairings on main gear
Nosewheel torque specs (per Beringer assembly drawing): 6mm screw = 10 N.m (88 in.lb), 1/4“ = 9 N.m (80 in.lb), 8mm = 20 N.m (177 in.lb), bearing contact ~25 N.m. Install locking wire and cotter pin. Check disc safety wire before every flight.
Inspection & Maintenance
Brake Bleeding
Tire Maintenance
| Specification | Value |
|---|---|
| Main tire size | |
| Nose tire size | |
| Main tire pressure | PSI |
| Nose tire pressure | PSI |
Tire source: Desser retreads — reference notes from another RV-10. Skip inner tubes and tires from other suppliers.
References
- Matco WI600 Series Wheel & Brake Manual (Rev A1)
- Beringer Wheels & Brakes Maintenance Manual
- Beringer RV-10 Nosewheel Assembly Drawing (AV-VANS-102-01) — includes maintenance manual + torque specs
- RV-10 Axle Extension Replacement Installation (VAE10/RVbits) — AN5-6A bolts, 100 in-lbs torque, drill existing axle nuts to 5/16“