ZL40A.30.5-34 is recorded as a disc for an XCMG loader rotating assembly. The source title does not define whether the disc performs a friction, spacing, retaining or drive-interface function, so the installed position and physical features must be checked instead of assigning an unsupported use.
Confirm the Disc by Position and Geometry
| Part number | ZL40A.30.5-34 |
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| Product type | Loader disc component |
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| Application | XCMG loader rotating assembly; confirm exact position |
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| Checks | Outside and inside diameter, thickness, center interface, holes or spline, face profile and mating components |
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Photograph both faces, installed stack order and any visible number. A flat view with a scale helps, but dimensions should be measured at unworn areas. For a multi-part pack, record the quantity and sequence of every plate, spacer and retainer.
Use Wear Evidence to Find the Cause
Uneven polish, scoring, heat colour, cracks, fretting or edge contact can reveal problems beyond the disc. Check the mating hub, shaft, flange, fasteners, bearings and housing alignment. A new disc may wear quickly against a warped face, loose spline, incorrect clearance or contaminated lubricant.
The page does not state unsupported material, hardness, friction lining, heat treatment or wear limit. Do not infer function only from the word “disc.”
Measurement and Inspection Checklist
Measure outside diameter, inside diameter and thickness at several positions.
Count holes, slots, tabs or spline teeth where present.
Record bolt circle, center pilot or spline dimensions as applicable.
Check faces for steps, grooves, taper, coating or direction.
Inspect mating parts for burrs, runout, looseness and uneven contact.
Confirm whether the replacement is individual or part of a set.
Assembly Control
Clean parts and work surfaces before assembly. Keep plates in their documented sequence and orientation. Replace damaged retainers and use the verified tightening and clearance procedure. Rotate the assembly by hand where permitted and monitor noise, vibration, temperature and leakage during commissioning.
Related XCMG Loader Driveline Parts
Inspection may include the main drive shaft Z3.4, the flange ZL40A.30 and the universal joint 2201C-030. These references do not establish compatibility or inclusion with ZL40A.30.5-34.
Frequently Asked Questions
What function does ZL40A.30.5-34 perform?
The source identifies it only as a disc. Confirm the assembly, position and physical features.
Can dimensions alone confirm the part?
Also compare the part number, center or spline interface, hole pattern, face profile and stack position.
Should only one worn disc be replaced?
Inspect the complete mating set and follow the service limits for the actual assembly.
Are plates and retainers included?
No inclusion is stated. Request an itemized quotation.
Quotation checklist: send ZL40A.30.5-34, model and serial, installed position, both faces, dimensions, interface details and wear pattern.
