Description
Vidéo du produit
Remarque : Les informations d’application fournies sont à titre indicatif uniquement. Veuillez confirmer le numéro de pièce et le comparer avec l’ancien composant avant d’acheter. Pour toute question, n’hésitez pas à nous contacter.
Il est judicieux de choisir un produit offrant des performances stables, une fiabilité élevée, une installation facile et une réponse rapide.
Informations détaillées
| Paramètres | Valeur | Remarque |
|---|---|---|
| État | Brand New Original | – |
| Garantie | 3-6 months according to product details; We do not provide warranty for original and used products. | – |
| Quantité minimale de commande | 1 pièce | – |
| Production Mensuelle | 300 pieces/month | – |
| Détails de l'emballage | Wooden case packaging or customized | – |
| Conditions de paiement | L/C, T/T, XT, PayPal, Western Union | – |
| Délai de livraison | 5 à 8 jours ouvrables (selon la situation de la commande) | – |
| Mode d'expédition | Sea freight, air freight or via DHL/FEDEX/TNT/EMS | – |
| Mesures de Garantie | We inspect the product and send detailed pictures to buyer for confirmation. | – |
Japanese precision, ready when you need it. No remanufacturing, no unknowns — fresh factory‑spec power for your 50‑ton class excavator.
When a 50‑ton excavator loses its final drive, the machine doesn’t limp — it stops. Dead. That 47,700‑kg machine becomes a $500,000 paperweight stuck in the middle of a mine face or highway cut. You don’t need a rebuilt question mark. You don’t need a used unit with unknown hours. You need a genuine Japanese final drive, factory‑fresh, ready to bolt on. And you need it now.
1. Principales caractéristiques et avantages
Hitachi HMG88ER final drive – OEM part numbers 4699092, 9091681, 9263592, 9298565. Fully interchangeable variants, all factory‑spec. This is not a remanufactured unit with repaired parts; it is a new, genuine final drive travel motor assembly manufactured to Hitachi’s exacting standards for the ZAX490‑5A and compatible 50‑ton excavators.
Genuine Japanese OEM components – Built in Japan to Hitachi’s original manufacturing specifications using Japanese metallurgy and quality control. Every bearing, gear, seal, and casting meets the same standards as the unit that left the factory on your ZAX490‑5A.
Swashplate axial piston travel motor with planetary gear reduction – The HMG88ER integrates a high‑efficiency variable displacement axial piston hydraulic motor with a multi‑stage planetary gearbox. This design delivers the tractive force needed to move a 50‑ton machine up steep grades, through mud, across uneven terrain, and into tight loading positions — all while maintaining smooth, predictable travel control.
Designed for the Isuzu 6UZ1 engine platform – The 4699092 travel motor is engineered to work seamlessly with the ZAX490‑5A’s Isuzu 6UZ1 engine (maximum output 257 kW / 349 PS). The hydraulic circuit parameters — flow rate, pressure curve, and response characteristics — are matched to the machine’s main pumps (2 × variable axial piston pumps, maximum flow 2 × 400 L/min).
High operating pressure capability – The final drive operates at a rated pressure of 31.9 MPa (approx. 4,630 psi), matching the machine’s main relief setting. This ensures the travel motor can develop full tractive force when the operator demands it — no power loss, no hesitation.
Two‑speed travel with automatic shift logic – The HMG88ER fully supports the machine’s two‑speed travel system. The operator can select high speed (5.5 km/h) for moving across the job site or low speed (3.1 km/h) for high‑torque crawling during digging, climbing, or pushing. The hydraulic control logic automatically shifts between speed ranges based on load and pressure conditions.
Integrated spring‑applied, hydraulically‑released parking brake – A wet multi‑disc parking brake is built directly into the travel motor assembly. When the travel controls return to neutral, the brake engages automatically, holding the 47‑ton machine securely on slopes. When the operator moves the joystick, the brake releases instantly — no drift, no creep, no hesitation.
Durable planetary geartrain with surface‑hardened gears – The planetary reduction stage uses precision‑ground, case‑hardened alloy steel gears designed for high shock load resistance. The gearbox housing is cast high‑strength iron, dimensioned to withstand the full weight and impact forces of a 50‑ton excavator working in mining, quarrying, and heavy construction applications.
Premium floating seals – Genuine Japanese duo‑cone floating seals prevent cross‑contamination between the hydraulic motor section and the planetary gearbox. These seals keep abrasive dust, water, and debris out of the gearbox while preventing gear oil from leaking into the motor cavity. They are the single most important factor in final drive longevity.
Plug‑and‑play direct replacement – Mounting flange dimensions, bolt patterns, sprocket interface, and hydraulic port locations match the OEM specifications exactly. No drilling, no welding, no modifications. Your mechanic unbolts the old final drive and bolts this one in.
Comprehensive cross‑model compatibility – The 4699092 final drive directly fits the Hitachi ZAX490‑5A, ZX470‑5G, ZX470H‑5G, ZX470LC‑5B, ZX470LC‑5G, ZX470LCH‑5B, ZX470LCH‑5G, ZX470LCR‑5G, ZX470R‑5G, ZAXIS470‑5A, ZAXIS470LC‑5B, ZAXIS470LC‑5G, ZAXIS470LC‑6, and compatible ZX490‑5 variants. The engine fitments include Isuzu 6UZ1XKSA01D, 6UZ1XZSA‑01, 6WG1‑TQA‑5, and 6UZ1XASA010A.
Livraison rapide – 5–8 working days lead time from our Guangzhou warehouse, with monthly supply capacity of 300 units.
2. What You Are Buying — And What You Are Not
You are receiving: A new, genuine Japanese final drive travel motor assembly. Factory‑fresh, never installed. No aftermarket substitutes, no remanufactured components, no second‑quality castings.
You are not receiving: A remanufactured unit with new paint over old parts. Not a used final drive salvaged from a scrapped machine with unknown hours. Not a “compatible” unit from a non‑Japanese supplier using uncertified components. You are buying the same quality that Hitachi put into your excavator when it was new — because we source directly from the same Japanese supply chain.
What this means in real terms: When you install this final drive, you are not gambling. You are not wondering how many hours the previous owner put on the unit, whether the bearings were replaced properly, or whether the floating seals will start leaking in three months. You are installing a component that matches the original in every measurable dimension — metallurgy, hardness, dimensional tolerance, seal compound, gear finish, bearing preload. It works like new because it is new.
3. Applications
The Hitachi ZAX490‑5A equipped with the HMG88ER final drive travel motor is a 50‑ton workhorse deployed across the most demanding industries in heavy construction and mining.
Opérations minières et de carrière – In open‑pit mines and aggregate quarries, 50‑ton excavators endure extreme shock loads, abrasive dust, long continuous shifts, and repeated high‑impact cycles. The final drive is the single most stressed undercarriage component. A failure in a remote pit can idle an entire production face. A genuine Japanese final drive delivers the reliability needed to keep production moving — and a replacement unit on the shelf turns a week‑long immobilization into a single‑shift repair.
Construction lourde et infrastructures – Highway cuts, dam foundations, bridge abutments, and large‑scale earthmoving projects demand consistent track mobility. A final drive failure in the middle of a highway cut stops production completely — the machine cannot move itself to a repair location, and towing a 50‑ton excavator requires specialized heavy recovery equipment. For fleet owners, a genuine final drive eliminates the guesswork of used components and provides predictable service life at a cost that justifies proactive replacement before failure.
Large‑scale excavation & site preparation – ZAX490‑5A machines are used in major earthmoving projects requiring sustained travel across rough terrain. The two‑speed travel system allows operators to move efficiently between work zones while retaining the low‑speed torque needed for climbing stockpiles and pushing through heavy material. The integrated parking brake holds the machine securely on steep slopes, even with a loaded 3.0 m³ bucket.
Entretien des parcs de location d'équipements – Rental fleets operating 50‑ton excavators see heavy use from multiple operators. Final drives are high‑wear components. A failure mid‑rental creates costly recovery logistics, lost revenue, and damaged customer relationships. A genuine final drive provides a predictable service life that makes proactive replacement a financially sound decision.
Aftermarket drivetrain rebuilds – When overhauling a ZAX490‑5A’s powertrain, installing a new final drive alongside the main pumps and travel motor ensures that the weakest link in the track drive is eliminated. This is standard practice for fleets that want to extend machine life beyond 20,000 service hours.
4. Why Choose Hongtengda Parts
At Hongtengda Parts, we have been supplying genuine and remanufactured undercarriage components for excavators since 2004. Headquartered in Guangzhou’s Zhucun parts hub — one of Asia’s major distribution centers for construction machinery — we combine deep inventory, cross‑brand knowledge, and reliable global shipping to keep your machines running.
25+ years of industry experience – Founded in 2004, we have sourced genuine Japanese final drives for Hitachi, Caterpillar, Komatsu, Kobelco, Hyundai, SANY, XCMG and more than fifteen other brands. We are not a middleman — we maintain direct sourcing relationships with Japanese supply chains.
New genuine stock, not reman – The HMG88ER final drive is a new, genuine Japanese component. No remanufactured units with unknown histories. No “rebuilt” cores with new paint. You receive a factory‑fresh final drive, ready to install. We can provide factory test reports upon request.
90% disponibilité en stock – Hitachi ZAX490‑5A final drive travel motor assemblies are in stock and ready for immediate dispatch from our Guangzhou warehouse. We are not a drop‑shipper — the unit you order is physically on our shelf, inspected, and ready to go.
Expédition sous 24 heures – From our Guangzhou hub to your forwarder in 1 day. International orders are shipped within 24 hours via sea, air, or express courier (DHL, FedEx, UPS, TNT). Most customers receive their final drive within one week.
Pre‑shipment visual verification – We never ship a final drive blind. Before packing, we take clear, high‑resolution photographs of your actual unit, including the mounting flange, splines, port threads, casting markings, and general condition. You approve shipment — we do not ship without your confirmation.
Emballage professionnel pour l'exportation – Chaque motoréducteur est emballé dans une caisse en bois robuste, sans fumigation, avec mousse intérieure et renforts d'angle. Votre unité arrive en parfait état, qu'elle soit expédiée par fret aérien ou dans la cale inférieure d'un porte-conteneurs.
Approvisionnement unique – Outre les motoréducteurs, nous fournissons des composants complets de train de roulement (chaînes de chenilles, pignons, galets de roulement, galets tendeurs, patins de chenilles), des pompes hydrauliques (série K5V), des moteurs d'orientation, des distributeurs, des pièces moteur et des kits de reconstruction complets pour les pelles hydrauliques Hitachi des séries EX et ZX.
Assistance technique avant achat – Vous n'êtes pas sûr que ce motoréducteur soit adapté à votre variante de machine spécifique ? Envoyez-nous le numéro de série de votre machine et une photo de l'ancien motoréducteur. Notre équipe d'atelier confirmera la compatibilité, vérifiera les schémas de boulonnage et les configurations des orifices sous 2 heures.
Assistance technique après-vente – Après réception de votre motoréducteur, notre soutien se poursuit. Si vous avez des questions sur l'installation, les couples de serrage, le routage de la ligne de vidange du carter ou les tests de freinage, nos ingénieurs sont disponibles par e-mail et messagerie.
Envoyez-nous le numéro de série de votre pelle Hitachi ZAX490‑5A et une photo de l'ancien motoréducteur — nous confirmerons la compatibilité, fournirons un devis ferme et documenterons notre inspection avant expédition pour votre approbation sous 24 heures.
Note de garantie : La période de garantie est de 3 à 6 mois selon les détails du produit. Nous ne fournissons pas de service de garantie pour les pièces d'origine ou usagées. Notre valeur est livrée d'avance : approvisionnement japonais d'origine, composants en état neuf et vérification visuelle avant expédition. Pour les clients nécessitant une option couverte par garantie, nous pouvons proposer des alternatives de rechange — veuillez consulter notre équipe commerciale.
Conseil d'installation critique pour le motoréducteur ZAX490‑5A :
La ligne de vidange du carter est le point de défaillance d'installation le plus courant. Si la ligne de vidange du carter est obstruée, pliée ou connectée incorrectement, une pression s'accumulera à l'intérieur du boîtier du moteur et fera sauter le joint d'arbre immédiatement lors de la première utilisation. Avant de démarrer le moteur, vérifiez que la ligne de vidange du carter est dégagée, sans restriction et correctement acheminée vers le réservoir.Assurez-vous que le côté du réducteur planétaire est rempli avec l'huile de boîte correcte (SAE 90 ou 80W‑90, API GL‑4 ou GL‑5) au niveau spécifié dans le manuel de votre machine — généralement environ 5 à 6 litres. Certains manuels ZAX‑5A spécifient de l'huile moteur 30W ou 40W dans le réducteur planétaire ; vérifiez la documentation de votre machine spécifique. Ne pas trop remplir ; un excès d'huile de boîte crée une pression interne qui peut forcer l'huile à passer au-delà des joints flottants duo-cône.
Après l'installation, actionnez les commandes de déplacement plusieurs fois au ralenti bas pour purger l'air du circuit de déverrouillage du frein. La machine peut ne pas bouger initialement jusqu'à ce que le système soit purgé.
