حفار محجر صغير حفارة مجنزرة صفراء 1.5 طن

 Hanhui H-15F — Site Supervisor Acceptance Report: Equipment Approval for Confined Urban Contract CONTRACT CONTEXT A confined urban drainage replacement contract. Street width: 4.2 metres. Working zone after traffic management cones: 2.8 metres. Requirement: excavate a 1.4-metre deep service trench alongside live telecoms ducting without ground vibration exceeding 5mm/s at 1-metre offset. Three 1.5-2 Ton Mini Excavator units were evaluated. Two were rejected. The H-15F was approved. REJECTION REASON FOR UNIT ONE Transport width when retracted: 1,720mm. Could not enter the working zone without removing traffic cones and exposing workers to live traffic. Rejected before engine start. REJECTION REASON FOR UNIT TWO Passed width criterion at 1,540mm. Failed vibration criterion: boom cylinder drift of 28mm over 10 minutes when parked adjacent to the open trench edge. Drift mechanism: mild-steel cylinder rod surface worn past wipe seal tolerance at approximately 650 hours. Uncontrolled boom movement near an open excavation adjacent to live ducting: not acceptable under site CDM requirements. WHY THE H-15F PASSED Transport width: 1,550mm retracted. Clears the working zone. Cylinder rod specification: 55 HRC surface-hardened stock on main boom and dipper. Static load hold test on site: zero measurable drift over 20 minutes with a full bucket suspended at 1.2-metre depth. Factory inspection card inside the cab confirmed this specification — rod hardness noted, serial-matched, signed. Ground vibration at 1-metre offset during bucket pull through compacted gravel fill: 3.1mm/s peak. Below the 5mm/s contract limit. Result achieved without reducing throttle below 85%. AUXILIARY CIRCUIT APPROVAL The contract specification required the machine to accept a hydraulic compaction plate for backfill. Compaction plate rated draw: 48 L/min. H-15F auxiliary port flow at site: 56 L/min measured with calibrated meter. Compaction plate ran at full impact frequency throughout backfill operations. Factory test card showed 58 L/min at delivery. Loss of 2 L/min over operating hours — within acceptable degradation for a compact excavator for sale in commercial service. KUBOTA SUPPLY CHAIN NOTE During the three-week contract, one engine oil and filter change was required. Parts collected from a local agricultural dealer on the same morning the service was due. Zero downtime. This matters on a traffic-managed urban contract where the plant hire cost runs regardless of whether the machine is working. SITE SUPERVISOR SIGN-OFF Machine approved for confined urban service. Cylinder rod condition, vibration characteristic, and auxiliary flow all within contract requirements. Documentation complete: 15 MPa factory pressure record and swing backlash reading on file. BUYER INFORMATION Works as a small digger on residential sites. Approved for confined urban civil contracts. Mini digger for sale direct from factory. One unit minimum. CE and ISO certified. Configure track, cab, and bucket on order.