Your Gear Has a PM Schedule Too: Strap, Chain, and Battery Care

Every carrier we work with has a maintenance schedule for the truck. Almost none of them have one for the gear. That is a strange gap, because the equipment in the side box fails in exactly the same way an air compressor does — gradually, invisibly, and then all at once at the worst possible moment. The difference is that a truck gives you warning lights and a shop that logs the intervals, while a strap just quietly loses capacity in the sun and a jump pack quietly drains to nothing over a summer of sitting. Gear PM is a fifteen-minute quarterly job. Here is what it covers and why each item is on the list.

How do straps actually age out?

Synthetic webbing degrades on three separate clocks, and only one of them is visible as damage. Mechanical damage is the obvious one: cuts, holes, tears, snags, abrasion from a rub rail or a sharp corner, broken or worn stitching at the eye or the sewn tag, embedded grit that saws at the fibres from inside. Chemical and heat damage is the second: battery acid, solvents, road de-icers, and friction burns from a strap dragged across a load under tension. All of those show as discolouration, stiffness, or a glazed, melted appearance in the webbing.

The third clock is the one drivers miss — ultraviolet exposure. Webbing left on a deck through summer after summer loses strength continuously whether or not it ever gets used, and the visible symptom is subtle: fading, a chalky surface, fibres that fuzz when you rub them. A faded strap is not cosmetically worn. It is a strap with an unknown, reduced working load limit, which is a different and worse problem than a strap with an obvious cut, because you can still read the tag and believe it.

Speaking of the tag: an illegible WLL marking is itself grounds to pull a strap. Under the federal securement rules a tie-down without a readable rating contributes nothing to your aggregate working load limit calculation as far as an inspector is concerned, no matter how strong it actually is. The retire-on-sight list is short and absolute — cuts, holes, tears, snags, broken stitching, knots of any kind, melting or charring, chemical burns, severe fading, or an unreadable tag. There is no repair. The strap comes out of service and gets cut so it cannot wander back into the pile.

What does chain inspection actually look for?

Transport chain is graded, and the grade is stamped on the links — Grade 70 is the standard for cargo securement, and it is marked. If you cannot find the grade markings, the chain does not count toward securement, same logic as the strap tag. Beyond the marking, inspection is link-by-link on the working portions: gouges, nicks, cracks, twisted or bent links, weld splatter or heat discolouration from something arced near the chain, and corrosion deep enough to have eaten section from the link body.

The measurement that separates a real inspection from a glance is elongation. Chain stretches under overload, and stretch is cumulative and permanent. Measure a known span — a set number of links, recorded when the chain was new if you can — and retire the chain when it has grown past the manufacturer's limit. A chain that has stretched has been overloaded at some point, which means it has already been asked to do more than it was rated for and its remaining capacity is a guess.

Two rules with no exceptions. Never repair a chain with a bolt, a wire, a shackle, or a mismatched link — the repair becomes the failure point and it voids the rating of the whole assembly. And inspect the binders with the same seriousness as the chain: bent handles are evidence of overloading, cracked or deformed hooks come out of service, and a ratchet binder with a worn pawl is a hand injury waiting for a cold morning. The securement fundamentals these checks protect are in our flatbed load securement guide.

Why does a jump pack fail when you finally need it?

Because lithium packs self-discharge, and a pack that lives in a side box does it faster. A pack charged in October and forgotten can be well down by February, and it will still show lights and still feel like a working tool right up until it is asked to deliver several hundred sustained amps into a cold Group 31 bank. Cold makes both halves worse: the engine needs more current when it is cold, and the pack delivers less when it is cold.

The PM is trivial and almost nobody does it. Top the pack up on a fixed interval — quarterly is the minimum, monthly through winter — and store it in the cab rather than the side box so it stays near cabin temperature. Check the clamps and cables while you are at it for cracked insulation and corroded jaws, because contact resistance is what actually kills a boost attempt. And know the pack's honest ceiling before the morning you need it: a handheld pack rated to a given displacement will not touch a 24V series-wired system, and a stone-dead big-bore in deep cold can exceed any of them.

The economics justify the habit on their own. A road-service boost runs $150–$300 in most metros and more off-corridor, but the invoice is the small part — the real bill is two to four hours of dwell on a winter morning while an appointment window closes and a reload gets jeopardized. A charged pack converts that into fifteen minutes. A dead pack converts it into the same service call, just later.

What else belongs on the quarterly walk?

The emergency equipment tier first, because it is the tier an inspector reads. Check the extinguisher gauge sits in the green, that the bracket is still tight and the bottle is genuinely secure, and that the tag and gauge are legible — an unreadable gauge is a defect regardless of charge. Weigh or shake-test the bottle per the manufacturer's guidance and put a serviceable unit on a real service interval instead of replacing it blind. Open the triangle case and work the hinges and wing nuts; the plastic goes brittle after a few winters and the failure shows up when you are already standing on a shoulder in the dark. Check the reflective panels for scuffing, because a scuffed triangle is a dimmer triangle.

Then the wear layer and the electronics. Boots retire on tread wear rather than on how the uppers look. Rain gear retires when the seam tape lifts or the reflective banding dulls. Gloves retire when the waterproof membrane starts letting water through. Lights get a charge cycle and a lens wipe, and any light running primary cells gets fresh ones before winter rather than after the first failure. Tire gauges get compared against a known-good reference, because a gauge that has been dropped reads whatever it wants and every pressure decision downstream inherits the error.

How do you actually make this stick?

Attach it to something that already happens. The easiest anchor is the truck's own service interval — the gear box gets emptied and walked while the truck is in the shop, which is dead time you are already spending. If you run a schedule like the one in our preventive maintenance schedule, add a gear line to it and it becomes automatic. The seasonal anchor works too: a full cull every fall before the first freeze and a full cull every spring after the salt season.

Two habits make the difference between a checklist and a system. Write down what you pulled and what you replaced, with the date — that log is what tells you a strap set is reaching the end of its service life as a set rather than one strap at a time, and it is a useful document to have if a securement question ever becomes a claim question. And keep enough spares on the truck that pulling a bad strap never leaves you short of your aggregate WLL requirement, because a driver who cannot afford to retire a marginal strap will keep using it. That is the exact mechanism behind a large share of the securement findings in our out-of-service violations guide— not ignorance of the rule, just gear that quietly aged past it while nobody was looking.

Fifteen minutes a quarter. Cull the webbing, measure the chain, top the pack, read the extinguisher gauge, work the triangle hinges, and write down what you replaced. The kit stops being a pile of assumptions and starts being equipment you can actually count on at 5 a.m.