The job of a trailer mudguard is simple – to stop spray, stones and road grime damaging the paintwork on your precious vehicle let alone whatever vehicle you are towing behind or equipment you have in your trailer! They are also one of the most frequently damaged – particularly on working trailers.
Why trailer mudguards crack
Virtually every crack boils down to vibration, impact or lack of support:
If the guard is not adequately fixed, it can easily flex as you haul. Eventually, that flexing leads to stress cracks. When you need Trailer Parts, visit autoandtrailer.com
Wind, stones and thumping the kerb can also cause damage. Even a gentle knock could cause an initial fine crack to form.
Tyres rubbing or overloaded: Again if the tyre moves back and catches on a mudguard (wrong size tyre, poor suspension design or bad positioning) it can split plastic in an instant or bend metal.
UV and weathering: Sunlight, cold temperatures = brittle plastic and UV degradation.
Bolts are also prone to becoming loose and rusty which weakens the attachment point.
Replace a mudguard (brief instruction)
Specify the type: Calibrate according to tyre width and wheel diameter as well as mudguard profile.
Look at the brackets: If the old guard broke, it could be a problem from installing. Provide an alternative to the dented brackets.
Break free the old fixings: lube rusty bolts with a nice oil.
Fit new mudguard – make sure there is even clearance around the tyre (remember to allow for suspension movement)
Securely fasten: Proper use of bolts, washers and nuts. Don’t overtighten plastic.
Pro Tip: If you’re doing one side, do the other – matching wear is typically not far behind.
If the mudguard is touching against a tyre or if mounting point has cracked, don’t tow until this is rectified. It is a tiny piece, but it will quickly result in more severe damage.
Leave a Reply