Spare parts maintenance and technical support
A replacement part is only correct when it is identified against the machine in front of you: model, serial number, engine configuration and the components already fitted. This page sets out what we identify for the ZL930 wheel loader, the TL-388 backhoe loader and the SLM2200 self-loading mixer, what you should inspect, and where our support stops.
01 — Three machine lines
The same service question has three different answers depending on which machine is on site — and on the backhoe loader, on which end of it failed. Start from the machine, not from the part description.
2-ton wheel loader
Loader-line service parts, identified from the model, serial number and the engine that is actually installed in the unit.
75 kW backhoe loader
Two systems on one chassis. Front loader and rear excavator parts differ, so each order is checked against the matching parts catalogue, including supersession.
2.2 m³ self-loading mixer
Loading, mixing and discharge on one chassis. Drum liners and mixing blades are the parts that decide the maintenance cost, and both are measured, not eyeballed.
02 — What identifies a part
Part numbers, compatibility, replacement options, availability and lead times are confirmed before an order is finalised. These are the inputs that make that confirmation possible.
Machine model and serial number
Not the description on the invoice — the plate on the machine. Build changes move part numbers inside the same model.
Engine configuration
Loader and backhoe builds can carry different engines, and filters and seals follow the engine, not the model name.
Components already installed
Attachments, tyres and options fitted at build or later change what the correct replacement is.
Operating hours
Tells us where the machine sits in the service schedule and what has probably already been replaced.
The fault itself
Fault codes, photographs and a description of the operating conditions — the difference between a part and a setting.
Compatibility and supersession are verified against the applicable parts catalogue before ordering. On the TL-388 this matters most: front loader and rear excavator parts are not interchangeable. The illustrated parts catalogue is versioned as well — the revision that matches your serial number is the one the part number comes from.
03 — The parts families
Eleven families account for most of the service parts across the three lines. For each one: what it is inspected for, and what we confirm before it ships.
| Part family | Fitted to | Inspect for | Confirmed before order |
|---|---|---|---|
| Engine, fuel and air filters | Loader · Backhoe · Mixer | Restriction, contamination, water in the bowl, damaged housing | Engine make and model, the real filter P/N, element type; the safety element where one is fitted |
| Hydraulic filters | Loader · Backhoe · Mixer | Bypass, contamination, seal condition | Circuit — return, suction or pressure — filtration rating, housing compatibility |
| Hoses and fittings | Loader · Backhoe · Mixer | Chafing, bulging, weeping at the crimp, exposed wire | Length, bore, pressure rating, fitting type and the circuit it sits in |
| Cylinder seal kits | Loader · Backhoe · Mixer | Weeping, rod scoring, drift under load | Which cylinder — boom, dipper, bucket, stabilizer, loading arm — bore and rod diameter, seal material |
| Pins, bushings and locking devices | Loader · Backhoe · Mixer | Clearance, ovality, fretting in the bore, a cracked locking device | Joint position, pin and bushing dimensions, hardness, lubrication method |
| Bucket teeth, cutting edges and wear plates | Loader · Backhoe | Wear against the repair limit, cracks, adapter wear | Bucket model, hole spacing, thickness; on the backhoe, front loader or rear bucket |
| Tyres and wheel fasteners | Loader · Backhoe · Mixer | Cuts, sidewall damage, torque loss, pressure | Size, type, rim fitment and the tyre maker's wear indicator |
| Hydraulic pumps, motors and valves | Backhoe · Mixer | Pressure, flow, temperature, noise, slow response | Pump or motor model, displacement, rotation, ports, pressure; valve block number and function |
| Brake service parts | Loader · Backhoe · Mixer | Brake clearance, lining thickness, leaks, braking performance | Brake type, part revision, the specified fluid — judged against the brake's repair limit, not on appearance |
| Drivetrain, axle and drum drive parts | Loader · Backhoe · Mixer | Axle, transmission, drum drive and reduction-gearbox service items | Axle, transmission and drive configuration; gearbox and reduction parameters |
| Drum liners, mixing blades and water system | Mixer | Measured thickness at the inspection points, cracking, distortion, flow and nozzle condition | Drum structure, liner shape and thickness, blade position, pump / valve / nozzle configuration |
Two parts that look alike on a photograph are frequently two different part numbers. The list above is the enquiry structure we work through, not a stock list.
04 — What to keep on the shelf
What to stock is a decision about downtime cost, not about the parts list. These are the three levels fleets usually settle on, and which one pays for itself is decided by how far the machine sits from the nearest parts counter.
The baseline every machine should carry, whatever its duty cycle.
The level that stops a one-day repair turning into a two-week wait.
Built from a risk review of the site, not from a standard package.
Quantities follow the model, the service interval and the hours you plan to run. High-value assemblies — hydraulic pumps, motors, axles, reduction gearboxes — are assessed per site against failure probability, local supply and lead time rather than stocked by default; on some operations the right answer is a named contact and a confirmed lead time instead of a spare on the shelf.
05 — Preventive maintenance
Routine inspection and timely maintenance reduce unexpected downtime and keep the machine safe to operate. Walk it in this order and the expensive failures get caught as cheap ones.
| Inspection area | What to check | Why it earns its place |
|---|---|---|
| Engine | Oil, coolant, filters and air intake | Restriction and coolant loss surface here before they surface as a repair |
| Hydraulics | Oil level, filters, hoses, pumps, motors, cylinder connections | Leaks and contamination are the expensive failures on any of the three lines |
| Tyres and running gear | Tyres, wheel fasteners, steering and braking systems | Safety-critical and the cheapest checks on the list |
| Loader arm and linkage | Pins, bushings, bucket linkage, locking devices | Unchecked clearance turns a bushing into an oval bore and a new arm end |
| Bucket, teeth and edges | Teeth, cutting edges, wear plates, structural condition | Wear rate is a direct cost per tonne moved |
| Backhoe front and rear | Front loader and rear excavator linkage, stabilizers, locking devices | Two systems, two catalogues — the wrong end ordered is a wasted shipment |
| Mixer drum side | Drum, mixing blades, liners, discharge components, fasteners | These are the parts measured at the specified inspection points |
| Driveline and axles | Axle parts, drivetrain service items, safety devices | Follows the manufacturer's schedule rather than a rule of thumb |
Service intervals, fluid specifications, lubrication requirements, tightening torques and hydraulic test specifications follow the applicable machine, engine, hydraulic and drivetrain manuals. Machines working in severe conditions may need more frequent inspection. On the mixer, clean the drum and discharge components after use as the operating manual requires — hardened concrete is the failure that prevents.
06 — When each check happens
Schedules differ by model, but nearly all of them are built on the same five check points. What changes between the lines is the content of each node — and on the mixer, the drum routine that runs every shift whatever the hour meter says.
| Node | Wheel loader · backhoe loader | Self-loading mixer |
|---|---|---|
| Every shift | Fluid levels, leaks, tyres and rims, brakes, steering, lights and alarms; teeth, edges, pins and visible cracks | Clean the drum and discharge chute to the manufacturer's procedure, then the same daily checks plus loading arm, bucket, drum and fasteners |
| 50 hours — first check | Lubricate the specified points; pin and bushing clearance, wheel fasteners, driveline connections, hose wear | Lubricate pins, pivots and driveline points; hose wear, loose fasteners, blade and liner condition |
| 250 hours — planned service | Engine oil and filters, hydraulic filter, transmission and axle fluids — where the manual calls for replacement | This node sits at 200 hours on the mixer: engine oil and filters, hydraulic filters, driveline, reduction gearbox, electrical connections |
| 500 hours — combined check | Cooling system, hydraulic lines, brakes, attachment clearance, axles and driveline | Hydraulic performance, drum drive, driveline, axles, brakes and the drum wear parts |
| 1,000 hours — major service | Systematic inspection; hydraulic pressure, transmission and brake performance, structural cracks, key pin wear | Key driveline parts, drum structure, blades and liners, loading mechanism, hydraulics and safety devices |
Nodes, not a fixed schedule. What is replaced at each node follows the maintenance plan approved for the specific model and serial number, the engine maker's schedule included — and a machine on severe duty moves up the ladder rather than following it to the letter.
07 — Wear inspection and repair
Wear parts are checked against the approved dimensions and service limits for the specific model. A part that has passed its limit is replaced, not adjusted.
Any of the following means the part comes off — before the next shift, not at the next service.
Isolate and lock out before work, and lower the attachment or support it mechanically — never let a hydraulic cylinder be the thing that holds a raised loader arm. Work on brakes, steering, stabilizers or load-bearing structure has to pass the specified safety verification before the machine goes back to work. Entering the mixer drum is confined-space work, not routine maintenance.
Remote guidance only covers checks whose risk is controllable and whose skill is on site. A high-pressure leak, a brake or steering failure, a structural crack, or any doubt about the safety state of the machine means it stops and a qualified person examines it in person.
08 — Technical support
The same process runs for a filter and for a failed hydraulic pump. What changes is how far it goes, not how it starts.
Fault ticket
Model, serial number, engine, hours, purchase record and when the fault started — logged against the machine, so the history stays with the unit rather than with a person.
Diagnostic evidence
Alarms and fault codes, fluid condition, where it leaks, photographs or video, and what the machine was doing when it failed.
Remote initial assessment
Worked in the check order of the manual for that model: an operating error, a maintenance gap, a part failure, or something that needs instruments.
Decision
The next checks, whether the machine should stop, the parts needed, the likely cost and whether the work has to be done on site.
Repair verification and closure
Repair record, the part numbers actually replaced, test results and the customer's confirmation — with the cause noted, so the next failure is a shorter call.
On-site service availability and warranty coverage are confirmed for the specific location and case. Neither is assumed from the machine model alone.
Warranty coverage, replacement-parts eligibility, labour and freight responsibilities are subject to the applicable written warranty terms. Ask for them with the quotation.
| Item | Inside warranty | Outside warranty |
|---|---|---|
| The part | Covered where the claim meets the policy and the cause is a parts or workmanship fault | Charged at the quoted parts price |
| Labour and on-site service | Per the written terms — not automatically free | Per the service quotation, agreed before the work |
| International freight and duty | Set by the warranty policy and the order terms | Per the quotation, the trade terms and the import rules |
| Wear parts, non-OEM parts, unapproved modification | Assessed against the terms and the actual cause of the failure | The contract decides fitment and repair risk |
| Downtime caused by the failure | Not compensated unless the contract says so | Not compensated unless the contract says so |
FAQ
They are the starting point, not the whole answer. The build also has to be known: engine configuration and the components already installed, because options and build changes move part numbers inside the same model. Send the model, serial number, the engine in the unit and what is fitted, and part number, compatibility, replacement options, availability and lead time are confirmed before the order is finalised.
Yes — the wheel loader, the backhoe loader and the self-loading concrete mixer. The backhoe loader is the one to be careful with: the front loader and the rear excavator use different parts, so each order is checked against the matching parts catalogue, including model supersession, before anything ships.
Nearly every schedule is built on five check points: every shift, 50 hours, 250 hours (200 on the mixer), 500 hours and 1,000 hours — the ladder on this page shows what each node covers. What is replaced at each node, the fluid specifications, lubrication points, tightening torques and hydraulic test values follow the manual approved for your model, engine and drivetrain. A machine on severe duty moves up the ladder rather than following it to the letter, and on the mixer, cleaning the drum and discharge components after use is part of the routine, not a separate task.
The support process is fault ticket, diagnostic evidence, remote initial assessment, a decision on parts and next steps, then repair verification and closure. On-site service availability and warranty coverage depend on the location and the specific case, so they are confirmed rather than assumed. Repairs involving hydraulic pressure systems, brakes, steering, stabilizers, load-bearing structures or internal drivetrain components must be performed by suitably trained and competent personnel.
Warranty coverage, replacement-parts eligibility, labour and freight responsibilities are subject to the applicable written warranty terms. Ask for those terms together with the quotation, so both sides are working from the same document rather than from an assumption about what a parts warranty usually covers. The warranty split on this page is the structure those terms follow — parts, labour and on-site service, freight and duty, wear parts and downtime.
Tell us the machine, the hours on it and what it is doing wrong. You get back the part identification, the replacement options and the maintenance step that goes with it.
One filter or a full service kit — start with the model and serial number.
