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What a real tower crane maintenance schedule contains

Most people picture a maintenance schedule as a list of dates. On a tower crane about a third of it is not dates at all — it is operating hours and events, and those are the parts that get missed.

Four different clocks

A tower crane programme runs on four things at once, and a system that only understands one of them will quietly lose track of the others:

• Dates — daily, weekly, monthly, quarterly, six-monthly, annual.
• Operating hours — gearbox oil, brake wear and similar, read off the hour meter, not the calendar.
• Events — erection, climbing, dismantling. These fall due when the work happens.
• Expiry dates — engineering inspections, structural NDT, major component inspections, insurance. These lapse rather than recur, and the five-year ones are the ones that catch people out, precisely because they never appear on anything you look at monthly.

The standard's side

CSA Z248-17 — 78 separate requirements

How often	Items
Every day it is used	13
Every week	10
Every month	8
Every six months	1
Every year	7
On erection, climbing or dismantling	39

The manufacturer's side

Two machines, two completely different schedules. Anyone who runs a mixed fleet off one generic checklist is putting the wrong figure on a brake.

ZOOMLION R275-12RB, saddle jib — 100 separate requirements

How often	Items
Every day it is used	16
Every week	7
Every month	10
Every three months	5
Every six months	10
Every year	9
On erection, climbing or dismantling	30
Every 2000 operating hours	5
Every 1500 operating hours	1
Every 2400 operating hours	1
Every 10 days	1
Every 100 operating hours	1
Every 450 operating hours	1
Every 21 days	1
Every 3 days	1
Every 500 operating hours	1

ZOOMLION RL250-16RB, luffing jib — 87 separate requirements

How often	Items
Every day it is used	10
Every week	8
Every month	15
Every three months	3
Every six months	4
Every year	6
On erection, climbing or dismantling	27
Every 7500 operating hours	4
Every 100 operating hours	2
Every 1500 operating hours	1
Every 10000 operating hours	1
Every 2400 operating hours	1
Every 730 days	1
Every 500 operating hours	1
Every 2 days	1
Every 3 days	1
Every 10 days	1

A crane sitting in the yard is not a crane with nothing due

Some items are triggered by time regardless of use. A slewing bearing needs greasing on an interval whether or not the crane has turned. Hydraulic seals have a shelf life. For a rental fleet that matters more than for an owner-operator, because machines spend real time between rentals.

Related guides

• Tower crane inspection requirements in BC — which sections of the Regulation apply, and who is allowed to do the work.
• Tower crane records you have to keep — what to hold per machine, and what a contractor asks for first.