Maintaining The Trailers Galvanized Surface Your Dunbier trailer is coated in a galvanized finish, where the trailer has undergone a chemical process that bonds very hot liquid zinc to the trailer and it’s components, becoming part of the base metal below it. The zinc covering forms a sacrificial barrier that protects the steel under the zinc, very similar to anodes provided in modern marine engines.
3 Month Check After a 3month period, or approximately 400km of use, start at the front of the trailer and re-tighten all nuts and bolts. It is the nature of zinc to be a very soft material and after a short period of time , the bolts and retainers work into the soft zinc and require retensioning. This will retension any bolts and fasteners.
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WARNING Do-not Use in this position Grease Grease Grease Grease Fig 1. Fig 2. Fig 3.
Wind-Up or Swing-Up Jockey Wheels When manoeuvring your trailer off the vehicle, fitted with wind-up wheels either as standard or optional on any hard or soft surface, the Jockey wheel should be completely in it’s wound down position as shown in Fig 2. With the jockey wheel in it’s full extended position as in Fig 3 you will strain and damage the jockey wheel.
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Fully Extended Fully Down Position Fig 1. Fig 2.
Axles And Springs Dunbier recommends that the suspension components be inspected at least twice yearly for any evidence of loose ubolts, bolts and corrosion or breakage of the leaf springs. Painted suspension components should be sprayed regularly with products such as inox type protectants to increase the life of the axles, springs and hubs.
Brakes and Brake Controllers The braking system on your Dunbier trailer is generally a disc brake over-ride system, either in mechanical (cable operated) or hydraulic (fluid operated). Hydraulic calipers must be sprayed with an anti-corrosion spray after use and fully serviced every 6 months. Trailers fitted with Hydrastar braking system should cover the Hydrastar unit when standing for long periods to guard against the elements as they are not water proof, never use spray directly with a hose or high pressure spray.
Tyres Correct tyre pressures are located on the yellow sticker at the front of your trailer and on the tyre’s side wall, regular checks for the correct inflation pressure and uneven tyre wear should be carried out. A boat trailers wheel camber is fixed and cannot be adjusted like a motor vehicle, a trailers axle will have a bow in the centre between 10mm to15mm and is in tolerance.
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Problem: In-side edge tyre wear single axle. Cause: Over loading and tyres not rotated. Fix: Rotate tyres or rotate on rim. Problem: In-side tyre edge wear tandem front axle. Cause: Over loading on the front axle, tyres not rotated. Fix: Adjust towing level between car &...
Trailer Lighting Lighting and wiring need a six-month inspection to ensure that there is no cracked lenses or corrosion in the wiring loom connecting plugs and the vehicle connections. Manual & Electric Winches The winches selected for use on your trailer are of high quality, particularly chosen for that trailer load capacity. However, do not overload your winch, use it only for the application it has been supplied for on normal ramp conditions.
Fitting Boats To The Trailers. For all Boat fit-ups to trailers, adjust winch post and alignment of winch after all other adjustments are made. Sports Series, Suits both Fibreglass and Aluminium Boats: Boat should sit hard on all keel rollers, side pads to be positioned as far out from keel as possible then adjusted to take the minimum amount of weight to steady the boat.
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Fitting Boats To The Trailers. SupaRolla & Alloy Series, Suits both Fibreglass and Aluminium Boats: Set the boat on the trailer with all cradles down except the front and rear sets, then adjust each individual set up with a jack under the leg until they are just firm on the hull.
The warranties herein contained extend to the original purchaser (whose details are recorded by Dunbier) only. They do not co ver any person to whom a trailer is transferred. Exercise of any of the above Warranties is subject to delivery of the Trailer to Dunbier and to proof of purchase and the date of purchase (as to which Dunbier’s records shall be conclusive in the case of disagreement.)
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Dunbier is not liable for physical or financial injury, loss or damage or for consequential loss or damage of any kind arising out of the supply, layout, assembly, installation or operation of the goods or arising out of negligence or in any way whatsoever.
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Thank you for purchasing a Dunbier boat trailer. If you encounter a mechanical problem with this trailer that your selling dealer for some unknown reason, cannot resolve, we at Dunbier would like to hear from you so please feel free to contact our customer relations department at one of our state or international office’s listed below.
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