Reactive vs. Proactive Maintenance: Why Starting Air Compressors Deserve a Maintenance Plan
Starting air compressors are rarely top of mind until they stop working. Without starting air, the main engine and auxiliaries cannot start. That makes a failed compressor an operational risk as much as a technical fault. Yet on many vessels, compressor maintenance still follows the same pattern: run until something breaks, then order parts in a hurry.
The reactive approach: fixing what has already failed
In reactive maintenance, parts are ordered when a problem appears, such as a broken valve plate, a fatigued spring or worn piston rings. It looks cheap on paper because nothing is spent until something goes wrong. In practice, the costs show up elsewhere:
Urgency drives cost. Parts have to be sourced at short notice, often by airfreight, and delivered to whichever port the vessel reaches next. Freight, agency and handling fees can quickly exceed the value of the parts.
Consequential damage. A single failed valve component can damage pistons, cylinders or the second valve stage. A small wear part turns into a major repair.
Pressure on the crew. Engineers have to identify parts under time pressure, often across several compressor generations and part-number revisions. Mistakes mean a second order and more delay.
No budget visibility. Spare parts spending comes as unplanned peaks, which makes fleet budgeting difficult.
The proactive approach: maintenance by running hours
Proactive maintenance replaces wear parts according to running hours, before they fail. The work happens during planned port stays, with the right parts already on board. The benefits are straightforward:
Fewer unplanned failures and less consequential damage
Standard shipping instead of emergency logistics
Predictable, plannable spare parts costs per vessel and year
Consolidated purchasing across the fleet instead of many small urgent orders
The gap: many makers don't define service kits
If proactive maintenance is so clearly better, why isn't it standard? For many compressor types, the information is missing. Some manufacturers publish clear service kits and intervals. Many others do not. That leaves superintendents and crews to work out for themselves which parts are due at which running hours, and to build their own kits part by part.
How DHV's Planned Maintenance Program (PMP) closes that gap
This is where our Planned Maintenance Program comes in. We developed the PMP specifically for starting air compressors. It builds on decades of workshop experience with the major brands.
Running-hour based service kits. For each compressor model and service interval, we define what needs replacing and supply it as a pre-packed kit. Where the maker provides no kit, we build one.
Fleet-wide planning. Based on your vessels' running hours, we forecast when kits fall due across the fleet, so procurement can be consolidated and planned in advance.
Fixed-budget fleet contracts. Predictable spare parts costs per vessel and per year instead of unplanned spending peaks.
Direct technical support. Our engineers support your crews and superintendents with questions on identification, installation and condition.
Reactive vs. proactive at a glance
Reactive | Proactive (PMP) | |
Trigger | Failure | Running hours |
Parts availability | Sourced in a hurry | On board before they are due |
Logistics | Airfreight, port-to-port | Planned, consolidated shipping |
Risk of consequential damage | High | Low |
Budget | Unpredictable | Fixed and plannable |
Talk to us
Would you like to see what planned maintenance could look like for your fleet? Ask us for a PMP proposal. We'll review your compressor types and running hours and show you what's due and when.