Short answer
The right boundary in attachment maintenance is not frequency but whether the job needs a TOOL. The operator owns everything that can be done by eye and by hand with the attachment still mounted: checking, greasing, cleaning, logging faults. The service team owns everything that needs a gauge, a torque wrench or a strip-down: tie rod torque, bushing wear measurement, nitrogen pressure, internal sealing. Where that line is unclear, two familiar mistakes follow: the operator makes a judgement without the tool to support it, or service is called for every small job and downtime grows.
The line is drawn by the tool, not the calendar
Maintenance charts are usually built as "daily, weekly, monthly" and that does not survive contact with a site. The load an attachment sees follows the work, not the calendar: a week of concrete demolition and a month in soft ground do not produce the same wear.
A more useful split is this: can the check be done with the attachment still mounted, by eye and by hand? If so it belongs to the operator and should be frequent. If it needs a tool, a measurement or a strip-down, it belongs to service and is planned against running hours.
The practical gain is clear ownership. "The tie rod was loose and nobody looked" is usually untrue: the operator may well have seen the cracked paint, but has no torque wrench, and service was never called. The fault was seen; it was not passed on.
The operator’s work
- The pre-shift round: bracket, hoses, tie rod marks, tool, grease, a run off load. The order is set out in its own guide.
- Greasing during work and keeping an eye on the automatic lubrication cartridge.
- Keeping the housing and the area around the hoses clean: caked mud and dust hide leaks and trap heat.
- Logging faults: writing down what was seen. An unlogged fault becomes, two shifts later, a failure nobody remembers.
- Reporting any change in sound or vibration. This is the check that needs no tool and gives the earliest warning.
The service team’s work
- Tie rod torque: with a torque wrench, in sequence and in stages. It cannot be judged by eye.
- Bushing wear measurement: clearance on the lower bushing and upper bushing is measured with a gauge, and the manual gives the limit.
- Nitrogen pressure check and recharge where needed: this needs a charging kit with a gauge.
- Internal sealing and piston surface: neither can be judged without opening the housing.
- Flow and pressure measurement on the hydraulic circuit: whether what the machine delivers matches what the breaker asks for.
- The condition of internal parts such as the wear plate, thrust ring and bearing surfaces.
Why we do not print the interval
We do not give an hour figure here, because the right interval changes with the model, the carrier size and the site. A breaker working abrasive rock and the same breaker in concrete demolition do not carry the same schedule. Your own model’s intervals are in its manual; if you do not have it, send us the model code and we will look them up.
The grey area: who makes the call?
Most lost time happens where both sides did their own job correctly and nothing was passed between them. The operator sees the fault and assumes service will come anyway; service arrives for planned work, and because the fault was never logged, it is not looked at.
What solves this is not a system but a single rule: if the same fault is logged twice, service is called. Damp seen once may be coincidence; damp seen a second time is a trend.
A second rule follows: the operator describes, he does not measure. "The tie rod is loose" is a measurement claim and may be wrong. "Cracked paint and reddish dust around the third nut" is an observation, and service brings the right tool for it.
Do and don’t
Do
- Tie the maintenance plan to running hours, not to the calendar; with no hour meter, at least count shifts.
- Keep the operator’s log where service will actually see it; a log nobody reads does not exist.
- Write the fault as an observation: where, and what it looked like. Diagnosis is service work.
- If the site runs several attachments of the same make and model, plan their service together; one visit covers both.
- Watch the attachment through its first hours after service; a breaker with new parts fitted has its own run-in question.
Don't
- Do not tighten tie rods without a torque wrench. Overtightening does as much damage as leaving them loose.
- Do not judge bushing clearance by rocking the tool in your hand; clearance is understood by measurement.
- Do not charge nitrogen without a gauge, and never substitute another gas.
- Do not postpone planned service because work is busy; postponed service takes its downtime at a time of its own choosing.
- Do not strip a part and leave it waiting for service; an opened breaker collects dust.
Who is counting the hours?
The one weak point in the arrangement above is where the running hours are read from. The carrier’s hour meter counts the time the machine ran, not the time the attachment worked. In a ten hour excavator shift the breaker may have worked three.
That gap breaks the maintenance plan directly. A plan built on carrier hours sends a lightly used attachment to service for nothing and catches a heavily used one too late. If the attachment moves between machines, the error grows.
This is why the service interval has to follow the attachment’s own running hours. Where there is no measurement on site, the most practical approach is for the operator to write an estimate at the end of the shift; imperfect, but better than carrier hours.
What HKM uses
SolidTrack: the plan follows the attachment’s own hours
The unit we fit to HKM breakers counts the time the breaker actually worked, independently of the carrier, and builds service reminders on those hours. The service team plans which attachment is due from a record rather than an estimate.
SolidTrack for service and maintenance teams(solidtrack.io)