6 - Maintenance
110
250 Hours Service - Hydraulic Circuit
Check the hydraulic circuit for leaks. Repair if needed.
Refill nitrogen accumulators for:
• ParaLift suspension
• Wheel axle suspension (if fitted)
• Yaw suspension (if fitted)
±
WARNING! Nitrogen accumulators may contain oil under pressure.
250 Hours Service - Hoses and Tubes
Check all hoses and tubes for possible damage and proper attachment. Replace damaged hoses or tubes.
In general, a hose or tube should always be replaced, if:
• it is leaking
• reinforcement material inside the hose is visible due to cracks in the outer layers.
250 Hours Service - Wheel Bearings
Check for play in the wheel bearings:
1. Place stop wedges in front of and behind LH wheel and jack up RH
wheel.
2. Rock the RH wheel to discover possible play in the bearings.
3. If any play, support the wheel axle to prevent the trailer from falling
down from the jack.
4. Remove hub cap (A) and cotter pin (B). Turn the wheel and tighten
the castle nut (C), until a slight resistance is felt in the wheel
rotation.
5. Loosen the castle nut until the first notch - horizontal or vertical - is
aligned with the cotter pin hole in the shaft.
6. Fit a new cotter pin and bend it to keep it in place.
7. Fill the hub cap with fresh grease and re-attach it onto the hub.
8. Repeat the procedure for the left wheel.
÷
NOTE! Some hub caps are attached with screws. Make sure the seal is intact or replace if worn!
500 Hours Service - Hydraulic Oil for TWIN System, Filter Change
See “50 Hours Service - Hydraulic Oil for TWIN System, Filter Change” on page 107.
500 Hours Service - Gearbox for TWIN System, Oil Change
See “50 Hours Service - Gearbox for TWIN System, Oil Change” on page 108.
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