The genuine XCMG Spacer with OEM number 800172845 is a precisely machined axial distance ring designed for XCMG articulated dump trucks and heavy off-road equipment. This spacer maintains correct component positioning in driveline assemblies, brake systems, and suspension linkages. Manufactured from high-grade steel with anti-corrosion treatment, the OEM 800172845 spacer ensures consistent preload and eliminates axial play in critical rotating groups.
The XCMG Spacer 800172845 is a seemingly simple but functionally vital component that establishes exact axial clearances between bearings, gears, and housings. In articulated dump trucks, improper spacer thickness leads to premature bearing failure, axle noise, and uneven tire wear. This OEM spacer guarantees the design stack-up height, allowing taper roller bearings to achieve the correct preload without binding or excessive play.
Manufactured from high-carbon steel and through-hardened to HRC 35, the 800172845 spacer resists indentation from repeated high-contact stresses. Its zinc-nickel plating provides superior corrosion protection even in salt-spray and high-humidity mining environments. Each spacer is double-disc ground to achieve flatness and parallelism within 0.02 mm, ensuring uniform load distribution across the mating faces.
The raw material for OEM 800172845 is sourced from certified mills with full traceability. After blanking or tube cutting, each spacer undergoes stress-relief annealing to eliminate residual stresses from forming. Then, the parts are hardened and tempered to achieve the specified hardness range. This process prevents micro-yielding under dynamic axle loads that can exceed 15 tons per wheel.
Every batch is 100% inspected using CNC vision systems: outer diameter, inner diameter, thickness, and parallelism are recorded. Any spacer exceeding tolerance is automatically rejected. The chamfers are deburred by centrifugal tumbling, eliminating sharp edges that could damage seals or bearings during assembly. This level of quality control is standard for XCMG genuine components.
The 800172845 spacer is used in multiple locations on XCMG articulated dump trucks, including front wheel hub bearing stacks, rear axle differential pinion preload, and brake caliper mounting brackets. It directly replaces original part numbers 800172844 and 860122389. On AD45 trucks, this spacer is often paired with tapered roller bearings LM102949/10 to set the correct endplay of 0.05–0.12 mm.
Beyond dump trucks, the spacer fits XE490 excavator swing gear boxes and LW900KN loader axle carriers. However, always verify dimensions before installation: measure the existing spacer with a calibrated micrometer. If the old spacer shows wear or deformation, always replace with a genuine XCMG 800172845 – using undersized aftermarket spacers can lead to hub bearing seizure after only 500 operating hours.
To install the Spacer 800172845, thoroughly clean the hub or housing bore. Apply a thin film of clean axle oil to the spacer faces. Slide the spacer onto the shaft or into the bearing cup recess. For taper roller bearing preload, stack the inner cone, spacer, and outer cone according to the workshop manual. Tighten the retaining nut to the initial torque, then rotate the hub several times to seat the rollers.
Back off the nut, then re-torque to final specification (typically 250 Nm for AD-series wheel hubs). Measure endplay with a dial indicator; correct range is 0.05–0.15 mm. If endplay is too high, a thicker spacer is needed; if too low, a thinner spacer. Genuine XCMG spacers are available in 0.1 mm increments. Never sand or grind a spacer to adjust thickness – this destroys flatness and causes uneven loading.
Common failure indicators for a worn or incorrect spacer include wheel bearing rumble, excessive endplay detectable by rocking the tire, or metallic debris in the axle oil. When a soft aftermarket spacer is used, it can compress under load, causing loss of bearing preload. This leads to brinelling of raceways and eventual bearing fragmentation, which can lock up a wheel at highway speeds – a serious safety hazard.
Fleet records show that using non-genuine spacers increases axle-related downtime by 320% over a 5,000-hour period. The cost of a genuine XCMG 800172845 spacer is negligible compared to replacing a destroyed axle housing (≈$12,000). Additionally, incorrect spacer thickness causes uneven tire wear, reducing tire life by up to 40%. Invest in OEM precision for lowest total cost of ownership.
Counterfeit spacers often mimic the dimensions but use low-carbon mild steel or unhardened material. They are typically painted instead of plated, and the paint chips off quickly, exposing the base metal to rust. A genuine XCMG 800172845 spacer has a uniform matte silver-zinc finish, and the part number is laser-etched on one face. The packaging includes a holographic label and a QR code for online verification.
Another telltale sign: counterfeit spacers often have rough, un-ground surfaces with visible tool marks. They may also have incorrect chamfer dimensions, causing interference with bearing fillet radii. Always purchase from authorized XCMG dealers or the official parts website. Protect your equipment and your operators – insist on genuine XCMG Spacer 800172845 for every repair.
During routine axle service (every 2,000 hours), inspect spacers for signs of fretting corrosion or thickness reduction. Use a micrometer to measure at four points around the circumference; any variation >0.05 mm indicates uneven wear and spacer replacement is necessary. Also check for raised edges (creep) – a sign that the spacer was spinning in the bore. Replace the spacer and the mating bearings as a set.
When storing spare spacers, keep them in a dry environment and apply a light preservative oil. The zinc-nickel plating provides good corrosion resistance, but scratches can expose steel. Never reuse a spacer that has been dropped on a hard floor – the impact can create microscopic flat spots that affect preload. Always use fresh genuine XCMG parts from sealed packaging.
Every XCMG Spacer 800172845 is produced in IATF 16949-certified facilities, meeting the same standards as original equipment installed on new AD-series trucks. The manufacturing process includes SPC (statistical process control) for every critical dimension, and destructive testing of sample batches to verify hardness, microstructure, and corrosion resistance. XCMG backs these spacers with a 24-month unlimited-hour warranty.
Moreover, XCMG’s sustainability program ensures that steel scrap from machining is 100% recycled, and the zinc-nickel plating uses lead-free, trivalent chromium technology, compliant with global environmental regulations. Choosing genuine XCMG components supports sustainable manufacturing while delivering the reliability your fleet demands.
