Agricultural Gearbox — Replacement of Bondioli & Pavesi

Replacement of Bondioli & Pavesi 2155 — Multi-Ratio Universal Agricultural Gearbox

This agricultural gearbox replaces the Bondioli & Pavesi 2155 series — one of the most widely installed gearbox families in European and Asian agricultural equipment. The 2155 platform handles power transmission across tractors, harvesters, feed processing lines, and material handling systems, making it one of the most frequently replaced gearbox types in Korean farming operations that use European-origin implements.

Five gear ratio configurations cover virtually every speed requirement from direct 1:1 drive through progressive deceleration to 2.42:1. The 1:1 universal configuration delivers full 121 HP (540 RPM in, 540 RPM out) for applications requiring speed-matched drive without reduction. The four deceleration ratios (1.25:1, 1.53:1, 1.93:1, 2.42:1) provide progressively lower output speeds — 432 RPM, 353 RPM, 280 RPM, and 223 RPM respectively — with proportionally increasing torque for heavy-load applications.

All five configurations use Gleason helical tooth geometry, the premium toothing standard for pto gearbox applications where noise, vibration, and load distribution matter. Korean equipment dealers, agricultural service workshops, and implement importers use this replacement gearbox to service the large installed base of Bondioli & Pavesi-equipped implements across the country — avoiding the 4-8 week European import lead time and the premium pricing that authorized Bondioli & Pavesi distributors charge for original replacements.

Technical Specifications by Gear Ratio

All configurations share the same housing, bearing arrangement, and shaft interfaces. The internal gear set determines ratio, output speed, and power capacity.

Why Replace with This Gearbox Instead of OEM

Applications Across Korean Agricultural Equipment

European Implement Service and Replacement

Korean farms operating imported European implements — Italian rotary tillers, German mower-conditioners, French baler systems — encounter the pto gearbox replacement challenge when the original Bondioli & Pavesi 2155 wears out after years of service. The original manufacturer's parts pipeline routes through European distributors with minimum order quantities and extended shipping times. This replacement provides dimensional and performance-equivalent service without the procurement complexity.

Multi-Application Equipment Fleets

Korean agricultural cooperatives managing diverse equipment pools — harvesters, feed processors, material conveyors, sprayers — often find that multiple machines in their fleet use the 2155 platform at different ratios. Stocking one replacement housing with multiple gear set options covers gearbox failures across the entire fleet. The 1:1 configuration serves direct-drive applications (pumps, generators), while the deceleration ratios (1.25:1 through 2.42:1) cover implements needing speed reduction (feed grinders, conveyors, mixer drives).

Equipment Rebuilders and Refurbishment

Korean used equipment dealers who refurbish imported second-hand European farming machinery for domestic resale need reliable gearbox replacement when the original drive train shows wear. The agricultural gearbox replacement program allows complete gearbox renewal as part of the refurbishment process — giving the rebuilt implement a fresh drive train at a fraction of the OEM parts cost, which improves the dealer's margin while giving the Korean buyer confidence in the rebuilt equipment's reliability.

Gleason Helical vs. Straight Bevel Tooth Profile

Some replacement gearboxes use straight bevel teeth as a cost reduction. Understanding the performance difference helps operators evaluate true replacement value.

The Gleason helical specification in this replacement matches the original Bondioli & Pavesi design intent. Installing a straight bevel alternative may cost less initially but produces higher noise (noticeable to the operator and livestock in nearby buildings), transmits more vibration to the implement frame (loosening bolts faster), and reaches pitting failure in roughly half the service hours. For Korean operations running high annual hours on large-scale farming, the Gleason helical option provides the lower total cost of ownership despite the higher purchase price.

Operating Conditions and Environmental Tolerance

• ◆ Korean Seasonal Temperature Range — The gearbox operates across Korea's full agricultural temperature range: -15°C winter storage through +38°C summer operation. The 80W-90 GL-5 oil grade maintains adequate viscosity across this range. For operations in northern Gangwon-do where winter temperatures reach -20°C, synthetic 75W-90 provides improved cold-start lubrication when equipment must be operated during early spring or late autumn cold snaps.
• ◆ Dust and Debris Exposure — Korean harvesting operations during the dry autumn period produce significant airborne dust and crop debris. The sealed housing design prevents particulate ingress through shaft penetrations and the breather vent. The breather uses a filter element that should be cleaned or replaced at each oil change interval — a blocked breather pressurizes the housing and forces oil past shaft seals.
• ◆ Monsoon Moisture — Korean summer monsoon season (June-August) exposes field equipment to sustained rain and humidity. The cast iron housing resists moisture better than aluminum alternatives, and the shaft seals exclude water spray. After prolonged wet-weather storage, check for water contamination in the oil (milky appearance indicates emulsified water) and change oil before operating if contamination is present.
• ◆ Continuous High-Load Service — The 121 HP rating at 1:1 ratio and the deceleration configurations handle the sustained loading patterns typical of Korean commercial farming — 8-12 hour daily shifts during planting and harvest seasons. The Gleason helical tooth contact pattern distributes this sustained load without the localized heat buildup that causes straight bevel gears to develop pitting after extended operation at or near rated capacity.

Case Study: Rice Milling Equipment Gearbox Replacement in Gimje

The rice huller — a critical piece of post-harvest processing equipment — failed during the second week of October 2024, when the facility was processing 15-20 tons of newly harvested rice daily. The original Bondioli & Pavesi 2155 bearing had developed excessive play after 6 seasons (estimated 4,800 hours), causing gear mesh misalignment, increasing noise, and eventually producing metal debris in the oil that triggered a precautionary shutdown.

The facility manager contacted the authorized European parts distributor and received a 6-week delivery estimate — well past the end of the harvest processing window. Unprocessed rice stored beyond 2 weeks in Korean October humidity deteriorates in quality, affecting grade and price. The replacement gearbox was sourced from Korean domestic inventory and arrived within 3 business days. Installation by the facility's maintenance team took 4 hours, including PTO shaft alignment verification.

The replacement unit with the same 1.53:1 ratio produced noticeably lower operating noise than the worn original — confirming that the previous unit's bearing deterioration had been affecting gear mesh alignment for some time before the final failure. The replacement completed the remaining 4 weeks of the harvest processing season (estimated 300+ additional hours) without incident, processing approximately 180 tons of rice.

Complete Your Drive System

This gearbox connects to the tractor through a pto shaft rated for the selected ratio's power capacity — 121 HP maximum for the 1:1 configuration, reducing proportionally through the deceleration ratios. Select a PTO shaft with appropriate overload protection (slip clutch or shear bolt) matched to the gearbox's torque rating at the installed ratio.

Our full agricultural gearbox range includes single-ratio drives, multi-speed gearboxes, and application-specific models. Browse the complete collection for all available configurations and replacement options.

Frequently Asked Questions

Is this a genuine Bondioli & Pavesi gearbox?
No — this is an aftermarket replacement manufactured to match the 2155 series specifications including housing dimensions, shaft interfaces, and Gleason helical tooth profile. It is not manufactured by or authorized by Bondioli & Pavesi. The "Replacement of Bondioli & Pavesi 2155" designation indicates dimensional and functional compatibility with the original equipment.

Can I change the gear ratio without replacing the entire gearbox?
Yes — the five ratio options share the same housing. If your application requirements change (for example, converting a direct-drive pump to a lower-speed mixer), the internal gear set can be swapped to a different ratio while retaining the installed housing and mounting arrangement. Contact our technical team for the gear set exchange procedure.

Why does power rating decrease at higher reduction ratios?
Higher reduction ratios use smaller pinion gears (the smaller gear in the pair) that have fewer teeth in contact at any given moment. This reduces the total tooth contact area available to carry the load, limiting the maximum transmittable power. The 2.42:1 ratio's 59 HP limit reflects the smaller pinion's tooth stress capacity at that ratio.

What documentation confirms dimensional compatibility with the original 2155?
We provide a dimensional comparison sheet showing our replacement gearbox dimensions overlaid against the published Bondioli & Pavesi 2155 specifications. This includes housing mounting bolt pattern, shaft center heights, spline profiles, and oil capacity. Request this document when ordering if your application requires precise fit verification.

How long does the gearbox take to install as a field replacement?
For a direct swap of a failed 2155 with this replacement, typical installation time is 2-4 hours. This includes removing the old unit, cleaning the mounting surfaces, installing the replacement, connecting the PTO shaft, filling with oil, and verifying alignment. No special tools beyond standard agricultural workshop equipment are required.

What Equipment Operators Report

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Seo Yeong-ho, Rice Processing Facility — Gimje, Jeollabuk-do, October 2025

"The 6-week wait for original parts would have cost us half the harvest processing season. This replacement arrived in 3 days and runs quieter than the original unit did before it started failing. The 1.53:1 ratio matches our rice huller exactly — bolt pattern, shaft splines, everything aligned on first installation."

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Noh Hye-jin, Agricultural Equipment Dealer — Suwon, Gyeonggi-do, August 2025

"Stocking the 2155 replacement covers a wide customer base — the Bondioli & Pavesi 2155 is in so many different European implements that Korean farms use. Having all five ratios available from Korean inventory means I can solve most 2155 failures with a single phone call and 2-day delivery. Profit margin is better than OEM parts too."

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Yun Sang-hyeok, Livestock Feed Processing — Asan, Chungcheongnam-do, May 2025

"Our TMR feed mixer runs 6 hours daily year-round. The original 2155 at 1.93:1 lasted 5 years before the gears showed wear. Replaced with this unit and immediately noticed less vibration in the mixer frame. The Gleason helical teeth must be doing their job — the old replacement we tried from a cheaper supplier was noticeably rougher."

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Moon Ji-won, Used Equipment Refurbisher — Daegu, Gyeongsangbuk-do, February 2025

"I refurbish imported European balers and feed equipment for Korean resale. Putting fresh 2155-compatible gearboxes in rebuilt equipment is standard practice — it eliminates the unknown service life of the original drive train. Customers see a new gearbox as evidence of a thorough refurbishment. I install 30-40 of these per year across different ratios."

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Kim Tae-ri, Agricultural Cooperative — Buan, Jeollabuk-do, December 2024

"Our cooperative operates 12 different European-made implements across 15 member farms. At least 5 of them use some variant of the 2155 gearbox. Having one Korean source for replacements at all five ratios simplified our spare parts procurement from 5 separate European suppliers to one domestic contact. Response time dropped from weeks to days."