ZE485E‑10‑5141 — Manufactured Nov 2020 | 3,746 hours | Parked in Wuhu | Bucket fitted

Brief overview

• Model/ID: ZE485E‑10‑5141
• Manufacture date: November 2020
• Hours: 3,746 (moderate–high; not new, but not extremely high if well maintained)
• Location: Wuhu (humid subtropical climate — consider corrosion/rust and cooling system issues)
• Configuration: bucket present (so full load testing is possible)

Key advantages

• Bucket present — enables digging/load tests to verify hydraulic and mechanical performance under load.
• Hours still within a range where life-extension is likely if maintenance is good.

Main concerns

• Moderate–high hours: wear on hydraulic pumps, swing/travel gearboxes, final drives and undercarriage is possible depending on duty cycle.
• Location: Wuhu’s humidity increases risk of surface corrosion, electrical connector corrosion and cooling/radiator fouling.
• Unknown maintenance history: service records critical to judge remaining life.
• Storage/idle effects: if machine has been parked for long, expect battery, fuel (microbial growth in diesel), seals and hoses degradation.

Priority pre‑purchase inspections (must do)

1. Documentation & IDs

   • Verify VIN/engine/serial numbers, full maintenance and repair records, accident history, and lien status. Confirm hour‑meter continuity and any machine swaps.

2. Request photos & videos

   • High‑res photos: engine bay, hydraulic tank fill sight, boom/arm pin joints, bucket (teeth/edge/wear), undercarriage (shoes, sprockets, rollers, idlers), swing bearing area, cab/controls, data plates, odometer/hour meter.
   • Videos: cold start, warm start, idle, and multiple cycles of digging, dumping, swing and travel under load.

3. Functional test (on‑site)

   • Cold and hot start observations (smoke, starter strain, idling).
   • Full load dig test with bucket: observe pump noise, speed/power, boom/arm motion, swing, travel under load. Check for sluggishness, overheating or reduced performance.
   • Listen for unusual gearbox or bearings noise.

4. Hydraulic system

   • Inspect for external leaks, hose condition, cylinder rod scoring. Check hydraulic oil level, color, foam/odor. Perform pressure and flow testing on main pumps and key circuits.

5. Oil & fluid sampling (strongly recommended)

   • Lab analysis for engine oil, hydraulic oil and final drive oils to detect wear metals, water, fuel dilution, and contaminants.

6. Undercarriage & wear items

   • Measure remaining life of tracks, shoes, sprockets, rollers and idlers; check for uneven wear, track tension and any prior repairs.

7. Pins, bushings, booms and structure

   • Measure pin/bushing play, inspect for cracks, weld repairs or deformation on boom, arm and chassis.

8. Swing, travel gearboxes & final drives

   • Check for play, overheating, internal noise and oil leaks.

9. Engine & exhaust system

   • Check turbo, injectors, exhaust smoke (black/blue/white), coolant condition, radiator and intercooler cleanliness.

10. Electrical & controls

• Read fault codes, test joysticks, displays, lights, battery health and HVAC operation. Look for corroded connectors given Wuhu humidity.

Red flags (walk away or demand large discount)

• Heavy smoke on start or under load; metal in oil lab results; severe pin/bushing play; major structural welds/cracks in stressed areas; persistent gearbox/final drive seizure or noise; badly worn or seized undercarriage components; evidence of flood damage or long-term salt exposure.

Common high‑cost items to budget for (if issues found)

• Main hydraulic pump replacement or rebuild
• Swing/travel gearbox or final drive repairs/replacement
• Engine major overhaul (if oil sampling shows significant wear)
• Undercarriage component replacement (tracks, sprockets, rollers)
• Bucket repairs (teeth, edge, welds), if heavily worn

Recommended next steps

• Ask the seller now for: maintenance/repair records, high‑res photos and operation videos (start + digging cycles), machine IDs and reason for any downtime.
• Arrange an independent on‑site inspection that includes hydraulic pressure/flow tests and oil sampling sent to a reputable lab.
• If inspection satisfactory, get quotes for any necessary repairs and schedule a test under real working load before finalizing.