MDC XT12HR 2021, Owner'S Manual, Page: 40 / 89

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Wheel s and Tyres
Highway
Your caravan is fitted with 16” wheels and 265/75 R16 Goodride Tyres. The tyres are a “Light Truck” ty re with a mud
terrain tread and a maximum load rating on single axle of 1550kg at 80psi.
Recommended highway pressure at tare weight of the caravan is 50psi
Recommended highway pressure at ATM of 3000kg is 72psi
Off Road
Off road driving requires lower tyre pressures and lower speeds. When driving on rough and corrugated road, a reduction
of speed and controlled deflation of tyres
is required to protect the caravan and its suspension from damage. In extreme
circumstances tyre pressures may be reduced significantly. When lowering from highway pressure, a rule of thumb is to
reduce your speed by the same percentage as the lowering of tyre pressure.
Because off road conditions can vary greatly, you must lower your pressures and reduce speed until vibration and shock
through the suspension is at a moderate level to suit the conditions you are experiencing, and the loaded weight of your
caravan.
WARNING: When returning to the highway or when increasing speed, you must reinflate the tyres to correct highway
pressures. Failure to reinflate can cause severe handling problems resulting in injury or death.
Suspension
Your camper is fitted with quality independent trailing arm suspension with dual shock absorbers. This design is ideal for
the full range of use on and off road however, there are limitations in prolonged use of corrugated and rough road.
Shock Absorbers & Bushes
The function of shock absorbers is to turn kinetic energy into heat and dampen the rebound in the suspension to keep
the tyre in contact with the road. During prolonged periods on corrugated and rough roads it is possible to overheat
shock absorbers to the point of failure (
shock fade). Best practice is to take regular breaks and allow both the shock
absorbers and suspension bushes to cool. Overheating the bushes through prolonged driving on corrugations can soften
the thermoplastic and cause premature wear and/or deformation
of the bush. On severely rough roads stop regularly up
to every hour to allow components to cool.
Hitch
Cruisemaster DO35
To ensure a long service life we recommend the following periodic maintenance procedures.
1. Always keep Tow Pin and Universal mating surfaces clean and lightly lubricated.
2. Check condition of Tow Pin O -Ring and replace if necessary (Part No. 18D-DO35-101).
3. Regularly lubricate grease points with multi -purpose grease.
4. Periodic adjustment of Slotted Nut & Pin may be required of coupling head loosens excessively and should
be a competent person.
5. Flush with clean water if locking mechanism does not open fully due to dirt ingress.
Ball Bearing Slides
To lubricate and protect from corrosion the ball bearing slides should be lubricated with a small amount of general
purpose grease every 6 months.