The document is about the maintenance manual of the trailer suspension, which introduces the maintenance methods of the trailer suspension, including how to check and replace the brake, shock absorber and other components.
This is Hendrickson Trailer Suspension Maintenance Manual, literature number 97117-161, revision D, dated March 2023. It provides preventative maintenance guidelines for Hendrickson trailer suspensions, intended for trailers sold and operating in Australia and used with the trailer manufacturer's recommendations and the National Heavy Vehicle Inspection Manual.
The manual covers general service notes, a suspension maintenance schedule matrix, suspension identification and identification plates, wheel ends, drum brakes, brake chambers, calliper and guides, the Tri-Functional Pivot Bush, shock absorbers, and tyres and axle alignment. It also lists related Hendrickson reference documents and includes safety notices for service work.
It provides detailed preventative maintenance guidelines for Hendrickson trailer suspensions.
It is based on either time or kilometres travelled, whichever comes first, for trailers sold and operating in Australia.
Inspection frequency is based on an average trailer usage of 180,000 km per year; higher usage requires more frequent inspections.
For off-road, abnormally rough, or extreme conditions, inspection and lubrication should be adjusted to help ensure maximum suspension performance and integrity.