40085560/4085560H Split Flange for Hitachi Excavator
40085560 split flange (also marked 4085560H) is a two‑piece clamping flange designed for high‑pressure hydraulic hose joints on large Hitachi excavators, mainly deployed for EX1900‑6 and matched heavy‑duty platforms. Unlike one‑piece integral flanges, this split‑type structure enables fast on‑site assembly and disassembly without fully removing connected hydraulic pipes. Under frequent digging impact and continuous machine vibration on mine sites, worn, deformed or cracked split flanges often trigger gradual hydraulic oil leakage, pressure drop and inefficient boom and arm movements. Poor sealing at flange joints can cause costly hydraulic‑system contamination and premature failure of pumps and valves. Manufactured to OEM dimensional tolerance, this replacement split flange maintains stable clamping force on hose couplings, reduces leakage risk and cuts down unplanned downtime during mining and quarry‑site operations. Maintenance teams prefer this part for easy field servicing, reliable clamping performance and readily accessible spare‑part supply from YLCM Parts.
Hitachi EX1900‑6 and compatible large excavators (confirm against official parts catalog)
Condition
New (Genuine / Aftermarket)
Origin
China
Warranty
6 months
Applications
Suitable for: Mining, Quarry, Heavy rock excavation, Large‑scale earthmoving, Infrastructure construction.
Why Choose Us
Hydraulic‑fitting‑oriented quality screening
We focus on hydraulic connection components for large mining excavators. Each batch of split flanges goes through flatness inspection and hardness sampling. Reject low‑grade soft steel which loses clamping force quickly under high‑pressure cyclic vibration.
Stocked for mine‑site emergency hydraulic repairs
Split‑flange failure leads directly to hydraulic‑oil leaks and machine stand‑still. We keep commonly‑used split‑type hydraulic flanges in stock to avoid long manufacturing lead‑time for urgent breakdown maintenance.
Pre‑shipment dimensional verification
Hole spacing, contact‑surface flatness and split‑gap dimension are inspected before packing. Parts with warped sealing faces are filtered out to avoid on‑site fitting failure and persistent oil‑leak trouble.
Dual‑sourcing for different site‑budget demands
Genuine reference and high‑quality aftermarket versions are available. We clarify material differences during quotation so repair supervisors can make appropriate purchasing decisions according to working‑condition severity.
Export‑ready service for global mining contractors
We supply hydraulic spare parts to repair workshops and mining operators in over 60 countries. We provide full export documents, proper anti‑rust packing and clear shipping marks for cross‑border delivery.
Technical check for model matching
If you are unsure whether this split flange fits your unit, send machine serial number. Our team verifies part compatibility within 24 hours and prevents wrong‑part ordering.
Packaging
Each split‑flange set is coated with anti‑rust oil to resist moisture and salt spray during sea transit. Contact sealing surfaces are individually wrapped with oil‑proof paper to avoid scratches and bruising. Multiple units are fixed inside reinforced export cartons to prevent shifting and collision. Outer cartons are printed with exact part numbers for quick identification during storage and customs clearance. Bulk orders adopt wooden crate reinforcement.
Shipping
We provide cost‑saving sea freight for bulk spare‑part orders and fast air freight for mine‑site urgent breakdown repair. In‑stock 40085560 split flange can be arranged shipment within 3‑7 working‑days after payment confirmation. Complete tracking information, packing list and export documentation are supplied. Our logistics team optimizes routes for major mining‑equipment import destinations worldwide.
FAQ
Q1: Which excavators suit 40085560 split flange?
Primary fitment is Hitachi EX1900‑6 large hydraulic excavator, other compatible models need cross‑check against Hitachi official parts catalogue. Send machine serial number for our confirmation.
Q2: What risk will defective split flange bring?
Damaged split flange reduces clamping force for hydraulic hose joints, resulting in hydraulic‑oil leakage, system‑pressure loss and slow cylinder action. Contaminants may enter hydraulic circuit and damage expensive pumps and valves.
Q3: Must I replace immediately after oil‑leak appears at flange joint?
First check bolt torque; if re‑torque cannot stop leakage, replace the split flange in time. Continuing operation will worsen hydraulic‑system contamination risk.
Q4: What is your delivery cycle for this split flange?
In‑stock goods dispatch within 3‑7 working days. Out‑of‑stock customized batches will confirm 15‑30 working‑day production cycle before order confirmation.
Q5: How are split flanges protected in international shipment?
Anti‑rust oil plus oil‑proof paper for sealing‑surface protection, packed in reinforced cartons or wooden crates for sea and air transport.
Q6: Does this split flange enjoy warranty coverage?
Yes, 6‑month warranty covers manufacturing defects. Damage caused by over‑torque installation, high‑pressure impact and normal wear is not covered.
Q7: How can I get quotation for 40085560 split flange?
Send us part number, purchase quantity and delivery destination. Our sales team will send detailed quotation within 24 hours.
Installation Guide
Release system pressure completely before disassembly, drain residual hydraulic oil near joint position.
Inspect new split‑flange contact surface, confirm no scratch, dent or deformation; reject defective pieces.
Position two halves of split flange on hydraulic hose coupling, align mounting holes correctly, do not force mis‑aligned assembly.
Tighten mounting bolts step‑by‑step with recommended torque value; avoid over‑tightening which deforms flange contact face.
Restore hydraulic‑system pressure, run machine and inspect joint position carefully for oil leakage.
Maintenance Tips
Inspect split‑flange joints every 500 working‑hours, check for oil seepage and bolt loosening caused by machine vibration.
Retorque loose mounting bolts in time; do not solve leakage only by blind over‑tightening.
Replace split flange promptly once surface dent, crack or permanent deformation occurs.
Inspect matched hose couplings and sealing gaskets simultaneously during maintenance, replace worn accessories together if necessary.
