Located beneath the tabletop, these pneumatic cylinders supply the force required to open and close the jaws. Seals inside these cylinders eventually dry out and leak air. 2. The Bead Breaker System
: Includes Air Control Valves , Water Separators , and Pressure Regulators to ensure smooth air flow.
Essential components include clamping jaws, slide guides, and the ø 75 cylinder with its associated gaskets.
| Component | Maintenance Interval | Action | | :--- | :--- | :--- | | | Monthly (or more in dusty shops) | Remove and inspect. Clean or replace the filter element to ensure clean, dry air reaches the pneumatic system. | | Plastic Jaw Protectors | Weekly | Visually inspect for cracks, excessive wear, or deformation. Replace immediately if damaged. | | Bead Breaker Spring | Quarterly | Check the spring (P/N 1970756) for tension loss or signs of metal fatigue. A weak spring will affect the bead breaker's return speed and force. | | Cylinders and Seals | Annually | Inspect all pneumatic and hydraulic cylinders (like P/N 4008807) for external leaks, pitting on the shaft, or signs of corrosion. If a cylinder is leaking, rebuild it using the appropriate seal kit. | | Wiring and Controls | Every 6 months | Examine the wiring harness and foot pedal switch for frayed wires, loose connections, or signs of overheating. Test all foot pedals for smooth, consistent operation. | hofmann monty 455 parts
Proactive maintenance is the best way to minimize downtime and extend the life of your tire changer. Based on the available parts data, here are key areas to focus on:
The machine uses a complete control valve assembly to manage air distribution.
: Essential for repairing leaks in the large bead-breaking cylinder. Air Control Valves : Both foot-controlled and tilt-function valves. Pneumatic Hoses & T-Unions : Various diameters (e.g., mm) used for internal air routing. Mechanical Wear Items Mounting Head (Duckhead) The Bead Breaker System : Includes Air Control
: Continuously atomizes oil into the air stream to lubricate moving cylinder gaskets dynamically. Essential Maintenance Parts
If the jaws are slipping on the rim while rotating:
The jaws grip the wheel from either the inside or outside. The teeth on metal jaws can dull over time, leading to wheel slippage. Furthermore, if your shop services custom alloy wheels, the clip-on plastic jaw protectors will crack and wear out regularly, necessitating a steady supply of replacements. Seals, O-Rings, and Valve Rebuild Kits Clean or replace the filter element to ensure
For a complete rebuild of the bead loosening cylinder, a seal kit is essential. The includes all replaceable seals that hold air in the cylinder. This includes:
: The internal system uses high-durability