Check a site dumper before every shift: fluid levels, tyres, brakes, steering, the skip and skip locks, the ROPS and seat belt, and the lights, beacon and horn, and take it out of use if anything fails. Grease the pivot points at least weekly, or more often where the operator’s manual says, and change oils and filters at the engine-hour intervals in the manual. SM Plant Sales in Rugby lists 207 filters and parts for Mecalac, Benford, Terex, Thwaites and Wacker Neuson dumpers.
- Do a walk-round check before every shift, and record it.
- A dumper that fails its check stays out of use until it is repaired.
- Grease the pivots at least weekly, or more often if the manual says.
- Service intervals for oils and filters are set in engine hours in the operator’s manual.
- Our filters range lists 207 filters.
Why do daily checks matter on a site dumper?
Daily checks catch the faults that cause dumper accidents and breakdowns before the machine goes to work. Overturning on slopes and at edges is a known cause of serious dumper accidents, which is why the ROPS, seat belt, brakes and steering are on every check list.
Under PUWER, work equipment must be kept in a safe condition, and a written daily check is how many sites show that. It also helps you spot wear early, while a part is cheap to replace and before it fails on a job.
What is on a site dumper daily check?
Park on firm, level ground with the skip lowered, the parking brake on and the engine off, then work round the machine. Do the running checks after you start it.
| Check | What to look for | Do not use the dumper if |
|---|---|---|
| Engine oil | Level between the marks on the dipstick | Below the minimum, or milky |
| Coolant (liquid-cooled engines) | Level in the expansion tank, with the engine cold | Low, or oily |
| Hydraulic oil | Level in the sight glass or on the dipstick | Below the minimum |
| Fuel | Enough for the shift, cap secure | Fuel leaking |
| Air filter | Restriction indicator, if fitted | Indicator showing blocked |
| Leaks | Under the machine and around rams, hoses and axles | Fresh oil or fuel dripping |
| Tyres and wheels | Pressure, cuts, sidewall damage, wheel nuts | Damaged tyre or loose wheel nuts |
| Brakes | Service brake stops the machine; parking brake holds it | Either brake weak |
| Steering | Lock to lock, smooth, no knocking at the articulation joint | Heavy, jerky or loose steering |
| Skip and tipping gear | Pivots, rams and hoses; skip returns fully | Skip drifting, leaking rams |
| Skip locks | Transport lock and, on swivel dumpers, the swivel lock | A lock that does not engage |
| ROPS | Raised and locked, pins in, no cracks or damage | Damaged, or will not lock |
| Seat belt | Buckles, retracts, no fraying | Belt damaged or not latching |
| Lights, beacon, horn | All working | Beacon or horn not working |
| Mirrors and camera | Clean, adjusted, camera picture clear | Broken mirror or camera, where fitted |
| Controls and gauges | Controls return to neutral; warning lights go out | A warning light that stays on |
Your site may add its own items, such as a seat belt indicator beacon or a reversing alarm. The operator’s manual for your dumper lists the checks the maker expects.
Where are the grease points on a site dumper?
A site dumper’s main grease points are its pivots: the articulation joint, the steering rams, the skip pivots and the skip rams. Grease them at least weekly, or at the interval in the operator’s manual if that is more often.
- Articulation joint pins (the centre pivot).
- Steering ram pins, at both ends.
- Skip pivot pins and skip ram pins.
- The swivel ring, on swivel-tip dumpers.
- Lift arm pivots, on high-tip dumpers.
- Folding ROPS hinges.
Wipe each nipple clean before you grease it, and pump until fresh grease shows at the joint. Replace any nipple that is broken or will not take grease: a dry pin wears quickly. The manual for your machine shows the exact points; the parts diagrams help if the manual is missing.
What does a dumper service include?
A dumper service is mainly oil and filter changes, with checks on belts, the battery and the cooling system, carried out at the engine-hour intervals in the operator’s manual. Follow the manual for your machine: intervals vary between makes, models and engines.
| Service item | What is involved |
|---|---|
| Engine oil and oil filter | Drain, replace the filter, refill to the grade in the manual |
| Fuel filter and water separator | Replace the filter, drain water from the separator |
| Air filter | Replace the outer element, and the inner one when the manual says |
| Hydraulic oil and filter | Replace the filter and change the oil at the stated interval; check the breather |
| Transmission and axle oils | Check levels, change at the stated interval |
| Coolant | Check strength and level, change at the stated interval |
| Belts and battery | Check belt tension and wear, battery terminals and condition |
Clean hydraulic oil matters on any dumper, and on a dumper with hydrostatic drive the hydraulics also drive the wheels, as on every Mecalac dumper since its 2025 EN 474 update. Use the filter the manual specifies, and keep dirt out when you top up.
Which wear parts should I keep on the shelf?
Keep a set of service filters for each machine, and replace pins, bushes and other wear parts when your checks show play or damage. Having filters in before a service is due stops a dumper standing idle.
SM Plant Sales lists parts for these dumpers:
- Mecalac dumpers: 1,270 parts.
- Benford dumpers: 733 parts.
- Terex dumpers: 732 parts, 730 of them also listed for Benford.
- Thwaites dumpers: 80 parts, across 66 models in the finder.
- Slanetrac: 58 parts.
- Wacker Neuson: 372 parts, with the DV45 to DV125 dumpers in the finder.
To see what is listed for your machine, open its page in Parts by machine: the TA9 / TA9S page lists 272 parts, for example. Order by 3pm on a weekday for next working day delivery of in-stock parts. If you are not sure which part you need, our guide to finding the right part explains what to send.
How should I record dumper checks?
Use a daily check sheet that records the date, the machine’s serial or fleet number, the hours reading, who did the check and any defects found. Keep the sheets with the machine or in the office.
- Report defects the same day, and tag out a dumper that fails until it is fixed.
- Note the hours at each check, so you can see when a service is coming up.
When should I call in a fitter?
Call a fitter for anything that affects braking, steering, the skip or the ROPS, and for any fault that comes back after a fix. Typical examples:
- Brakes that feel weak or a parking brake that will not hold.
- Play in the steering or knocking at the articulation joint.
- A skip that drifts down or will not lock.
- Cracks in the ROPS, chassis or skip mountings.
- Hydraulic leaks that return, or warning lights that stay on.
SM Plant Sales offers one-off repairs, maintenance checks and service agreements; see our servicing page. The service request asks for the make, model, serial number, service hours and photos.
Questions
How often should a site dumper be greased?
At least weekly, or more often where the operator’s manual says. Grease the articulation joint, steering rams, skip pivots and skip rams, plus the swivel ring on swivel-tip dumpers.
What should be on a dumper daily check sheet?
Fluid levels, leaks, tyres and wheel nuts, brakes, steering, the skip and skip locks, the ROPS and seat belt, and the lights, beacon and horn. Record the date, hours, who checked and any defects.
How often does a site dumper need servicing?
At the engine-hour intervals in the operator’s manual, which vary between makes, models and engines. Note the hours at every daily check so you can see a service coming.
Who is responsible for dumper daily checks?
The operator usually carries out the pre-use check, while the employer or machine owner is responsible under PUWER for keeping the dumper maintained in a safe condition. On hired machines, check your hire terms.
Can I use a dumper with a faulty seat belt?
No. Take it out of use until the belt is repaired or replaced, because the seat belt and ROPS work together to protect the driver if the dumper overturns.
Where can I buy filters for a Benford or Terex dumper?
SM Plant Sales lists 207 filters and parts for 28 Mecalac, Terex and Benford machines in its Parts by machine finder. Send the model and serial number to the parts desk on 01788 555377 or WhatsApp 07989 556457 if you are not sure which filter fits.