ZE500G‑5017 — long‑reach arm, Wuhu, manufactured 2023, 4,299 hours, bucket fitted.

Quick overview

• Model: Zoomlion ZE500G
• Unit no.: ZE500G‑5017
• Manufacture: 2023
• Hours: 4,299 h (moderate–high)
• Attachment: Bucket assembly fitted (please confirm bucket type, capacity, teeth/adapter condition)
• Location: Wuhu, Anhui (parked/working)

Key points to note (long‑arm specific)

• Long‑reach arms change stress patterns on boom, arm, pins and pivot bushings — inspect for fatigue cracks, weld repairs, and elongation at pin bores.
• Check that the long arm is factory OEM option vs. aftermarket/field‑modified; non‑OEM extensions can require extra scrutiny (weld quality, reinforcement, material mismatch).
• Hydraulic and cylinder sizing/flow must match long‑reach duties; verify cylinder rod condition and check for extended‑stroke wear.

Condition checklist (recommended inspection & tests)

1. Documentation
   • Verify VIN/unit number and obtain complete service/maintenance records, repair invoices and any modification certificates for the long arm.
2. Visual inspection
   • Boom, long arm and stick: look for cracks, welding repairs, paint differences, distortion and elongation at pin bores.
   • Bucket: cutting edge, teeth/adapters, floor/side wear, welds and pin condition.
   • Undercarriage: shoes, pins & bushings, rollers/idlers, sprockets — measure wear % and remaining shoe thickness.
   • Cab & controls: joysticks, gauges, HVAC, safety devices, monitor screens.
3. Functional tests (record video)
   • Cold start, idle behavior, exhaust smoke color.
   • Full operational test with digging demo at long reach and at close range: boom/arm/swing/travel under load. Evaluate cycle times, pump response, cavitation/noise.
   • Check machine stability with an appropriately loaded bucket at extended reach.
4. Diagnostics & fluids
   • Scan ECM for active/historical fault codes.
   • Engine oil and hydraulic oil sample analysis (spectrometric wear & contamination).
   • Check final drive, gearbox and hydraulic tank oil levels and condition.
5. Hydraulic & cylinder checks
   • Inspect rod surface for scoring/pitting and seals for seepage.
   • Pressure test hydraulic system and listen for pump noise or cavitation under load.
   • Inspect hoses/fittings for abrasion and repairs; verify quick‑coupler if present.
6. Structural & pivot checks
   • Pry/test for pin/bushing axial/radial play; quantify wear % if possible.
   • Check swing bearing for axial/radial play and bolt torque.
7. Undercarriage measurement
   • Measure pin & bushing wear % and report remaining life (common thresholds: >25–30% wear consider replacement planning; >50% replacement likely needed).
   • Measure track shoe thickness and check for missing shoes or severe wear.
8. Safety & ancillary systems
   • Test brakes, travel motors, horn, lights, mirrors, seat belts, and ROPS/FOPS condition.

Common wear/repair items to budget for at ~4,300 hrs

• Undercarriage components (pins/bushings, rollers, sprockets) — likely moderate wear.
• Bucket teeth/cutting edge and wear plates.
• Pivot pins & bushings (especially on long‑reach linkage).
• Possible hydraulic hose replacement and cylinder seal service.
• Routine consumables: filters, belts, coolant, final drive oil depending on records.