6 - Maintenance83250 Hours Service - Hydraulic Brakes (optional)Apply brakes to full pressure and inspect brake lines for damages or leaks. Replace damaged parts. If the hydraulic brake lineshave been dismantled, the hydraulic circuit must be vented afterwards:1. Loosen the brake hose at both brake cylinders.2. Apply the brake, until oil without air bubbles comes out.3. Tighten the brake hose, before relieving the brake again.± WARNING! Always vent the circuit, if the hydraulic brake lines have been dismantled.1000 Hours Service - Wheel Bearings and BrakesCheck the condition of the bearings and brake wear parts in the following way:1. Place stop wedges in front of and behind the wheel opposite tothe one to be serviced (e.g.left wheel). Jack up the wheel to beserviced (e.g. right wheel).2. Support the trailer with axle stands.3. Remove the wheel.4. Unscrew the 6 bolts and remove the hub cap (A), cotter pin (B) andcastle nut (C).5. Pull off the brake drum (D). Use a wheel puller if necessary.6. Vacuum the brake drum (D) for brake dust, or rinse it with water.€ DANGER! Brake dust can cause severe health injuries! Avoid inhalation of brake dust! Wear a respirator when servicingthe brakes. Do not clean brakes with compressed air! Use a vacuum cleaner or rinse with water to avoid brake dustbeing blown around.7. Rinse the remaining parts on the brake carrier plate with water and wipe them.8. Remove roller bearings (E), clean all parts with a degrease detergent and wipe them.9. Check the brake drum diameter and lining thickness. Replace if worn.Max. wear rates on brake components:• Max. drum diameter: 302 mm (Small drums)• Max. drum diameter: 402 mm (Large drums)• Min. lining thickness: 2.0 mm± WARNING! The specified minimum thickness is the absolute minimum, which must never be exceeded. Replace theparts, if they would reach the above dimensions before the next service inspection.± WARNING! Renewal of brake linings or brake drums must be done for both sides at the same time.μ ATTENTION! If the brake drum must be removed from the wheel hub, a hydraulic press is required to press the wheelstuds out.
