ZL40A.30.5.1 is recorded as a disc for an XCMG loader assembly. For a disc used in a stacked or rotating group, the customer needs to know where it sits, which face points outward and what else must be inspected. Recording the disassembly sequence prevents a correct part from being installed in the wrong position.
Create a Stack Map Before Disassembly
Mark the housing or carrier orientation and photograph every layer as it is removed. Number plates, discs, spacers and retainers in order. Record whether one face has grooves, steps, chamfers, tabs or a different finish.
| Part number | ZL40A.30.5.1 |
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| Product type | Disc component |
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| Application | XCMG loader assembly; verify group and stack position |
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| Match points | OD, ID, thickness, center interface, tabs or holes, face profile, orientation and mating plates |
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Compare Faces, Not Only Diameter
Measure thickness at several points away from grooves. Inspect both faces and compare the centre interface, edges and any oil passages or relief features. A disc can share the same outer diameter with another component while differing in thickness, tab location, spline form or face direction.
The source record does not define an unsupported friction material, hardness, coating or wear limit. It also does not prove that the disc is supplied as a complete pack.
What Wear Patterns Mean
Uniform light contact differs from hot spots, blue colouring, radial scoring, broken tabs or tapered wear. Inspect mating plates and the hub or carrier for the same pattern. A warped part, insufficient clearance, contamination, low lubrication flow or a loose interface can damage a new disc quickly.
Assembly Control Points
Keep new and reusable components separated by recorded stack position.
Compare ZL40A.30.5.1 with the removed disc on both faces.
Confirm thickness, centre engagement and directional features.
Replace damaged retainers and inspect springs, spacers or plates that set clearance.
Apply the specified lubrication and clearance procedure.
Rotate by hand where permitted and confirm free movement.
Related XCMG Loader Components
A pack inspection may also reference the friction disc ZL20-032103, the disc ZL40A.30.5-34 and the pump wheel 402227. These are catalog references only and do not prove common fitment or inclusion.
Frequently Asked Questions
Does ZL40A.30.5.1 define orientation?
Not here. Record the removed part's stack position and face direction, then verify assembly data.
Should the whole disc pack be replaced?
Inspect all mating components and follow the service limits for the actual assembly.
Can a similar-looking disc be substituted?
Compare part number, thickness, center interface, tabs or holes, face profile and stack position.
Is it sold with mating plates?
No supply scope is stated. Request an itemized list and quantities.
Quotation checklist: provide ZL40A.30.5.1, model and serial, assembly and stack photos, both faces, dimensions, quantity and wear observations.
