CAT 325 Final Drive Travel Motor Assembly – Remanufactured to Original Equipment Standard (Complete Gearbox)

Description

Detail Information

Note: The application information provided is for reference only. Please confirm the part number and compare it with the old component before purchasing. If you have any questions, please feel free to contact us.
It is worth choosing a product that features stable performance, high reliability, easy installation, and quick response.

The final drive travel gearbox (Part No. 114‑1357) converts the hydraulic motor’s high‑speed rotation into the low‑speed, high‑torque output required to turn the track sprocket. Because the drivetrain on a 20 ton class CAT 325 must withstand heavy digging, tipping loads, track‑tension shock, and long travel cycles, this planetary gearbox is engineered for continuous high‑torque duty. However, when the original unit wears out, scrapping it and buying new OEM is often the most expensive approach to a routine powertrain repair. A professionally remanufactured gearbox delivers the same fit, torque rating, and service life for a fraction of the cost. Our remanufactured CAT 325 travel gearbox is a drop‑in solution that restores OEM driveline integrity without the OEM price tag.

1. Key Features & Benefits

• Direct-fit remanufactured travel gearbox – Complete planetary assembly (Part No. 114‑1357) designed as an exact replacement for CAT 325, 320B, 322B, 325B, 325B L, 322B L LOGGER, and related excavators.

• Essential drivetrain component – The travel gearbox multiplies the hydraulic motor’s torque and reduces its rotational speed to drive the track sprocket. Without a healthy planetary system, the machine loses all mobility. The gearbox’s two‑speed reduction allows the operator to switch between high‑speed travel for moving around the site and low‑speed, high‑torque crawling for demanding digging, pushing, or climbing.

• Six‑step remanufacturing to like‑new standard – Each core is fully disassembled, every component hot‑tanked and inspected, all worn or damaged parts (bearings, shafts, planetary carriers, rings, seals and wear plates) replaced with new OEM‑grade components, then reassembled and dyno‑tested to confirm proper torque output, gear contact pattern, and temperature rise [2†L16-L17][10†L8-L10][11†L8-L10]. This is not a field repair or cosmetic cleanup — it is a manufacturing‑grade restoration.

• Planetary gear set, fully rebuilt – The planetary assembly is the core of the travel gearbox, responsible for converting hydraulic motor speed into the torque needed to move your CAT 325. On these Caterpillar excavators, a unique design issue means the gear coupler (part of the hydraulic motor section) is lubricated by the gear oil from the planetary assembly [12†L28-L33]. During remanufacturing, both the planetary gear set and the coupler are inspected and restored together.

• Common failures eliminated in reman – Field failures on the CAT 325 final drive frequently involve low gear oil, which accelerates wear on gear teeth, coupler splines and bearings [12†L34-L36]. Deteriorated seals also allow debris ingress, causing additional damage [3†L7-L9][12†L37-L41]. Our reman process installs new seals, high‑temperature grease, and GL‑5 gear oil, resetting the housing to original cleanliness and sealing integrity — eliminating the most common field failure causes before the unit leaves the shop.

• Hydraulic contamination clean‑up – Hydraulic system contamination often leads to swash plate scoring or cracking inside the travel motor [12†L45-L49]. The gearbox and motor are separate units in these CAT excavators. When hydraulic oil has been contaminated, the gearbox is flushed, inspected, and restored to eliminate residual debris.

• Tested on a hydraulic dyno – Every remanufactured travel gearbox is mounted to a test stand, connected to a hydraulic power unit, and run through both speed ranges under load [14†L55-L56]. Test parameters include operating pressure, shaft speed, case drain flow, brake holding torque, and noise/vibration levels.

• Visual verification before shipping – Before packing, we send you detailed high‑resolution photographs of the final drive, including close‑ups of the mounting flange and port threads. You approve the condition — we do not ship blind.

• 100% certainty fitment guarantee – When you provide your machine’s serial number, we cross‑reference the mounting flange bolt pattern, torque rating, planetary ratio, and sprocket drive dimensions before release. This ensures that every unit matches the drivetrain configuration originally installed on your CAT 325. [8†L10-L12]

• Professional export packaging – Each final drive is securely packed in a heavy‑duty, fumigation‑free wooden case with internal bracing and padding to prevent damage during transit. Custom packaging options are also available on request.

• Fast delivery – 5–8 working days lead time from our Guangzhou warehouse. Monthly supply capacity of 300 units, available for single or bulk orders.

2. Applications

The CAT 325 final drive travel gearbox is used across a wide range of heavy industries where track‑mounted mobility is critical:

• Mining and quarry operations – 25 ton class excavators endure extreme shock loads, abrasive dust, and long continuous shifts. A remanufactured planetary gearbox with new bearings and seals provides the same durability as new at a fraction of the cost [5†L27-L31]. When the original unit fails in a remote site, a pre‑remanufactured gearbox minimizes extended downtime.

• Heavy construction and earthmoving – Highway projects, dam construction, large‑scale site preparation, and pipeline trenching all demand consistent travel performance. A failing gearbox leaves a 20 ton excavator immobile in the middle of a job site — and towing a machine of this class is neither quick nor cheap.

• Demolition and scrap processing – 25 ton excavators working in demolition or metal recycling face intense vibration, sharp debris, and repeated hard impacts against the undercarriage. The planetary gearing inside the travel gearbox must absorb these extreme shocks without internal damage. A freshly remanufactured unit ensures that capability is restored.

• Forestry and land clearing – Steep slopes, soft ground, and hidden obstacles are routine in forestry applications. A reliable travel gearbox with predictable two‑speed shifting prevents machine‑stranding failures far from repair support.

• Equipment rental fleet maintenance – Renters are hard on undercarriage components. A travel gearbox that fails mid‑rental damages customer relationships and costs days of lost revenue. A remanufactured unit provides a fresh start at a cost that makes proactive replacement economically sensible [14†L9-L12].

• Cold climate and winter operations – In sub‑zero environments, worn seals and bearing cages are far more likely to fail. Our remanufacturing process includes new cold‑rated seals and high‑grade GL‑5 gear oil when specified for your operating environment.

• Aftermarket engine and drivetrain rebuilds – When overhauling a CAT 325’s driveline, installing a fresh remanufactured gearbox alongside a new undercarriage ensures that the weakest link in the track drive is eliminated. This is standard practice for fleets that want to extend machine life beyond 15,000 service hours.

3. Why Choose Hongtengda Parts – The Remanufacturing Advantage

The CAT 114‑1357 travel gearbox houses the planetary geartrain that multiplies torque to move your excavator. When the original unit wears out — scoring on the planetary shafts, pitting of the gear teeth, bearing cage fatigue, or seal failure — a properly remanufactured unit delivers the same torque rating and service life as new, at a fraction of the cost.

Common field failures on the CAT 325 final drive include:

• Gear oil neglect — Low oil level accelerates wear on gear teeth, coupler splines, and bearings, eventually leading to a complete lock‑up [12†L34-L37].

• Seal failure — A failing seal allows gear oil to escape and debris to enter, causing extensive damage to the planetary assembly [3†L7-L9][12†L37-L41].

• Hydraulic contamination — Contamination leads to scored or cracked swash plates, reducing performance or causing catastrophic failure [12†L45-L49].

• Aged gear oil — Oil that is never changed takes on a pudding‑like consistency and becomes worse than having no oil at all [12†L41-L44].

Our remanufacturing process eliminates these failure modes:

• Complete disassembly — Every final drive is stripped to bare housings. Bearings, seals, O‑rings, and gaskets are always replaced with new. Planetary carriers, rings, and shafts are inspected and salvaged only if within spec.

• Gear oil system reset — The housing is flushed to remove old degraded oil. New GL‑5 gear oil is filled to OEM level before shipment.

• Sealing integrity restored — New Duo‑Cone floating seals and O‑rings are installed, preventing cross‑contamination between the hydraulic motor section and planetary gearbox [12†L30-L33].

• Dyno testing — Every unit is run through both speed ranges under load, verifying torque output, operating pressure, and case drain flow.

• 90% stock availability – CAT 325 final drive travel gearboxes (114‑1357) are in stock and ready for immediate dispatch from our Guangzhou warehouse. No waiting for backorders or overseas shipments.

• 24‑hour shipment – From our Guangzhou hub to your forwarder in 1 day; international orders shipped within 24 hours via sea, air, or express courier.

• Pre‑shipment visual verification – Every unit is photographed before packing. You receive clear, high‑resolution images confirming the condition, paint finish, and port thread integrity. You approve shipment — we do not ship blind.

• One‑stop sourcing – We also supply complete travel motors, swing motors, hydraulic pumps, control valves, undercarriage components (track rollers, idlers, sprockets, track chains), engine parts, and full rebuild kits for Caterpillar, Komatsu, Hitachi, Kobelco, Hyundai, SANY, and XCMG machines.

• Technical support before and after – Our in‑house workshop team can confirm fitment (send your machine serial number), provide installation guidance, and help troubleshoot any issues during commissioning [14†L50-L56].

Send us your CAT 325 machine serial number – we will confirm final drive compatibility and provide a quote within 2 hours.

4. Before You Order – Quick Compatibility Check

Send us:

• Machine serial number (325, 320B, 322B, 325B, or other compatible models) – this is essential; final drive mounting patterns changed between production years

• Optional but helpful: a photo of your old travel gearbox (showing the mounting flange, port locations, and any visible part number markings)