TRAILER INSPECTION CHECKLIST
Air Hose Assembly Will be free of leaks or damage. Minor weather checking on hoses
is acceptable. Air filter assemblies will function properly.
Repair kits will be installed 100 percent for units that do not
Will be free of leaks, damage or corrosion that would weaken the
Wheel bearings will be greased and adjusted properly. Springs
will be free of cracked or broken leaves, excessive worn bushings,
and will show no indication of a permanent set. Spring mounting
hardware will be in place and free of damage. Axle tubes will be
free of breaks and cracks; radius rods will be straight and rubber
bushings will be serviceable. Shock absorbers will be properly
mounted and serviceable. Weather checked rubber grommets are
acceptable. Axle spindle threads will be free of wear, cross threads
or damage. Axle spindles will be free of bends and damaged
The operational components of the brake system will be
completely inspected to insure reliability. Brake systems utilizing
polyglycol brake fluid will be converted to silicone brake fluid in
accordance with TB 43-0002-87.
The hand or parking brake will be complete with all linkage in a
serviceable condition and properly adjusted.
Service brakes will be inspected by removing the brake drums.
Brake lining will be properly secured and have a minimum of 50
percent of original thickness remaining above rivet head or 50
percent of original thickness if bonded. Lining will show no
evidence of oil or grease. Brake backing plates and related parts
will be properly mounted, free of bends and distortion.
Brake drums will not be cracked or distorted. Scores on drum
braking surfaces that reduce lining-to-drum contact more than 10
percent are not acceptable. Refinished drums that are machined to
maximum allowable diameter are acceptable if remaining scores
do not exceed 1/32 inch in width or 1/64 inch in depth. Oversize
will be stamped on outer face of drum just above and between two
studs on finished drums. Linings will not be shimmed. New shoe
and lining assemblies, if required, will be used on both brakes of
the same axle, using the same brake lining composition. Drums
must be matched per axle and will be checked and serviced in
accordance with the applicable TM.
Brake Cylinders. Master and brake cylinders will be inspected to insure reliability.
Cylinders will be clean, free of leaks or seepage, properly mounted
and operate freely under pressure. Boots and dust covers are
acceptable with minor weather checks. Evidence of swelling from
oil, grease or hydraulic fluid is not acceptable.