The genuine XCMG 800106873 Oil Distribution Flange is a precision‑machined hydraulic component manufactured for XCMG GR series motor graders. This OEM oil distribution flange is used to route pressurised hydraulic fluid and transmission oil to multiple circuits, including steering, brake actuation, clutch engagement, and implement control systems. Made from high‑strength ductile iron (GGG50) with precision‑drilled internal passages and accurately positioned mounting holes, the 800106873 oil distribution flange ensures leak‑free flow distribution under extreme pressures and vibration.
The 800106873 flange features a fully machined sealing surface with a flatness of ≤0.05 mm, integrated O‑ring grooves, and threaded ports for hose or tube connections. The internal galleries are designed to optimise flow while minimising pressure drop, ensuring consistent performance of the grader’s hydraulic and transmission systems. The flange is coated with a zinc‑nickel plating (720h salt spray resistance) to withstand harsh environmental conditions.
A cracked, warped, or corroded oil distribution flange will cause fluid cross‑leakage, loss of pressure to critical functions, and potential system contamination. Replacing a failed flange with genuine XCMG 800106873 restores original flow paths, eliminates internal bypass leakage, and ensures safe, reliable machine operation. Keep this flange in your parts inventory for hydraulic manifold or transmission valve body repairs.
| Parameter | Specification |
|---|---|
| OEM Number | 800106873 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Hydraulic / Transmission Oil Distribution Flange |
| Material | Ductile iron (GGG50 / EN-GJS-500-7) |
| Overall Dimensions (L × W × H) | 185 mm × 120 mm × 45 mm (±0.2 mm) |
| Mounting Bolt Pattern | 4 holes, M10 × 1.5, 150 mm × 90 mm PCD |
| Port Threads (Inlet) | G 3/4″ BSPP |
| Port Threads (Outlets) | G 1/2″ BSPP (4 outlets) |
| Maximum Working Pressure | 25 MPa (250 bar / 3,625 psi) |
| Proof Pressure | 37.5 MPa (375 bar / 5,440 psi) |
| Internal Flow Capacity (total) | 200 L/min (53 US gal/min) |
| Sealing System | Integrated O‑ring grooves (Ø2.5 mm cross-section) |
| Surface Finish (sealing areas) | Ra ≤0.8 μm (ground) |
| Corrosion Protection | Zinc‑nickel plating (720h salt spray), yellow passivation |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Fluid Compatibility | Mineral oil, synthetic hydraulic oil, ATF, diesel, coolant |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1139-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 800106500, 800106800, 800106872 |
The 800106873 oil distribution flange is mounted directly on the main hydraulic control valve or transmission housing. It receives pressurised fluid from the pump and distributes it to individual circuits such as blade lift, circle rotation, articulation, steering, and brake release.
In the transmission, this flange routes oil to the clutch packs and torque converter, enabling smooth gear shifts and power transmission. A cracked flange can cause cross‑leakage between circuits, resulting in unintended blade movement or delayed clutch engagement.
The precision‑machined internal galleries eliminate sharp turns that could cause cavitation or pressure loss. The flange’s thick walls and ribbed design provide rigidity, preventing deflection under high pressure pulses from the pump.
Replacing a distorted or corroded flange with genuine XCMG 800106873 restores original flow division, eliminates parasitic leakage, and ensures that each hydraulic function receives the correct flow and pressure.
XCMG produces the 800106873 flange using high‑pressure green sand casting with ductile iron to achieve a dense, defect‑free structure. The casting is heat‑treated (normalised and tempered) to relieve residual stresses and improve machinability.
CNC horizontal machining centres perform all critical operations: facing of mounting surfaces, drilling and tapping of bolt holes, boring of internal oil galleries, and O‑ring groove cutting. The sealing face flatness is held to 0.05 mm across the entire surface.
After machining, the flange is thoroughly deburred using high‑pressure water jet and then zinc‑nickel plated. The plating is applied evenly to achieve 8–12 μm thickness, providing both corrosion resistance and a non‑stick surface for O‑rings.
Each flange is 100% pressure‑tested (25 MPa) with heated oil to verify no internal or external leakage. CMM inspection verifies all port locations and thread depths. Genuine XCMG flanges are built to last 10,000+ operating hours.
Before installing a new 800106873 oil distribution flange, clean the mating surface of the valve body or housing thoroughly. Use a brass scraper to remove old gasket material or sealant, then wipe with a lint‑free cloth and solvent.
Inspect the O‑ring grooves for burrs or contamination. Install new O‑rings (supplied separately) that match the groove size – use only genuine XCMG seals for correct material and hardness. Apply a thin film of hydraulic oil to the O‑rings before assembly.
Position the flange over the dowel pins or bolt holes. Tighten the mounting bolts in a crossing pattern to the torque specified in the service manual (typically 45 Nm for M10 bolts). Do not over‑tighten, as this can distort the flange and cause O‑ring extrusion.
After installation, pressurise the system and inspect for leaks at all ports and the flange joint. Re‑torque bolts after the first hour of operation if required. Keep spare 800106873 flanges in your workshop for quick replacement of cracked or warped units.
Aftermarket oil distribution flanges are often made from grey cast iron (GG15) with lower tensile strength and poor impact resistance, leading to cracks under pressure spikes. Many have poorly machined internal passages that restrict flow and cause cavitation.
Counterfeit flanges may have incorrect port thread sizes or locations, making them impossible to install without adapters. Some lack proper corrosion protection and rust within months, contaminating the hydraulic system with iron particles.
Genuine XCMG flanges are cast from ductile iron, 100% inspected for internal porosity via X‑ray, and certified for material strength. XCMG provides a 12‑month warranty against manufacturing defects. Using OEM flanges prevents cross‑leakage, maintains system responsiveness, and avoids costly downtime.
Visual signs: oil weeping from the flange joint, visible cracks near bolt holes or port threads, and corrosion pitting on the sealing face. Operational symptoms: slow implement response, erratic steering, or intermittent brake release due to internal cross‑leakage.
Preventive replacement is recommended every 5,000 operating hours or during any major hydraulic system overhaul. The flange is subject to fatigue from thermal cycling and pressure pulsing; even if not leaking, micro‑cracks may be present.
Keep a stock of 800106873 flanges in your fleet warehouse. When rebuilding the main control valve or transmission, always install a new distribution flange – reusing an old flange risks hidden cracks that could fail suddenly. Proactive flange replacement eliminates system pressure loss and unpredictable breakdowns.
The XCMG 800106873 Oil Distribution Flange is stocked in regional distribution centers: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide.
Expedited courier (DHL/FedEx) provides 1–2 day shipping for urgent hydraulic system repairs. Bulk orders of 5+ flanges receive volume discounts and can be shipped by sea freight. Each flange is individually packed in a foam‑lined crate with desiccant and VCI paper.
For large fleets, consignment stock programs ensure immediate availability. Our parts specialists provide technical support for flange identification, O‑ring selection, and installation torque data. Export documentation and customs clearance are handled for all international shipments.
Don’t risk hydraulic circuit cross‑leakage or loss of critical functions due to a damaged distribution flange. Order the genuine XCMG 800106873 Oil Distribution Flange today and restore precise oil flow to your motor grader’s steering, brake, and implement systems.
Upgrade your grader’s hydraulic reliability with XCMG genuine oil distribution flanges. Engineered for high pressure, corrosion resistance, and accurate flow division. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader performing optimally – choose 800106873 OEM flange.
