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Yanmar ViO Series mini excavators are designed for buyers who need compact dimensions without giving up useful digging capability. The key feature is Yanmar’s true zero-tail-swing concept: on applicable ViO models, the rear of the rotating upper structure does not extend beyond the crawler width. That makes the series especially relevant for urban construction, utilities, landscaping, drainage and other restricted jobsites.<\/p>\n
The main buying question is not simply \u201cWhich ViO is best?\u201d It is which ViO size matches your regular work, site access, transport system and attachment requirements?<\/strong> The lineup covers machines from around 1 tonne to more than 5 tonnes, so the difference between a ViO12, ViO25 and ViO55 is substantial. This guide explains how to choose the right class and what to inspect before buying a used machine from Japan.<\/p>\n Yanmar describes the ViO range as its true zero-tail-swing excavator family. The company introduced the ViO concept in 1993 and developed it around the idea that the rear of the upper structure should remain within the crawler width during rotation.<\/p>\n This matters most where an excavator works close to:<\/p>\n Reducing rear overhang can make machine positioning easier on restricted sites. However, zero tail swing does not mean the complete excavator remains inside the tracks. The boom, arm and bucket still need sufficient working clearance.<\/p>\n For overseas buyers, the ViO range is therefore best viewed as a family of compact excavators with similar design priorities but very different working capacities.<\/p>\n The ViO lineup covers several machine classes. The correct starting point is the work you perform most often.<\/p>\n These are representative manufacturer specifications. Cab, canopy, quick-hitch, rubber-crawler, steel-crawler and special configurations can change operating weight and dimensions.<\/p>\n Specifications vary by model year and configuration. Exact specifications should be confirmed for each individual machine.<\/strong><\/p>\n The smallest ViO machines are most useful when site access is the main restriction.<\/p>\n Yanmar’s ViO12-2A uses a variable-width undercarriage and is designed for work around buildings and other narrow sites. Yanmar’s global specification lists a 3TNV70 diesel engine, 9.3 kW rated output and a 0.028 m\u00b3 standard bucket.<\/p>\n This class can suit:<\/p>\n The advantage is access, not maximum production. Buyers should avoid choosing a very small ViO only because transportation appears easier. If regular jobs require deeper excavation or substantial material movement, a larger machine can be more productive.<\/p>\n The ViO20 and ViO25 move into a more capable range while remaining compact.<\/p>\n Yanmar lists the Japanese ViO20-6 at 1,990 kg in its basic two-post canopy rubber-crawler specification, with a 0.06 m\u00b3 bucket and 14.3 kW rated output.<\/p>\n The ViO20 is particularly interesting because a variable-width undercarriage is available. Yanmar’s technical documentation explains that the undercarriage can be widened from 1,380 mm to 1,550 mm in the applicable configuration, improving stability while retaining access flexibility.<\/p>\n The ViO25-6C increases the basic Japanese specification to 2,500 kg, with a 0.08 m\u00b3 bucket and 15.2 kW rated output.<\/p>\n This class can be useful for buyers who need:<\/p>\n The 3- to 3.5-ton class is one of the most versatile parts of the ViO lineup.<\/p>\n The current Japanese ViO30-7 is listed at 2,990 kg in the basic canopy rubber-crawler specification, with a 0.09 m\u00b3 bucket and 18.5 kW engine output. The ViO35-7 increases machine mass to 3,490 kg and standard bucket capacity to 0.11 m\u00b3 while retaining 18.5 kW rated output.<\/p>\n Both use a Yanmar 3TNV88-ESBV2 three-cylinder diesel engine in the referenced Japanese specifications.<\/p>\n Representative differences include:<\/p>\n The ViO30 can make sense where transportability and lower machine mass remain important. The ViO35 becomes more attractive when the buyer needs greater digging depth, bucket capacity and machine stability without moving directly to the 4- or 5-ton class.<\/p>\n The ViO45 and ViO55 offer considerably more working capacity while keeping the zero-tail concept.<\/p>\n The Japanese ViO45-6C specification lists 4,500 kg for the basic canopy rubber-crawler version, a 0.14 m\u00b3 bucket and a Yanmar 4TNV88C-PBV3 diesel producing 27.5 kW.<\/p>\n The ViO55-6C is listed at 5,150 kg in the equivalent basic configuration, with a 0.16 m\u00b3 bucket and 33.5 kW from a Yanmar 4TNV86CT-PBV2 diesel.<\/p>\n Maximum digging depth is listed at 3,360 mm for the standard ViO45-6C and 3,710 mm for the ViO55-6C.<\/p>\n These models can make more sense for:<\/p>\n The trade-off is weight and transport size. A ViO55 should not be considered simply as a slightly larger ViO30. Local trailers, trucks, bridges, access roads and jobsite space need to support the heavier machine.<\/p>\n This is a starting framework. Ground conditions, digging depth, lifting requirements, attachment use and local transport rules can change the best choice.<\/p>\n The ViO concept gives the biggest advantage where site width is genuinely restricted.<\/p>\n Urban contractors, utility companies and businesses working beside occupied buildings may benefit more from true zero tail swing than operators working mainly on open farmland or large earthmoving sites.<\/p>\n If almost all of your jobs take place in open areas, a conventional or short-tail model from another machine family may also be worth comparing.<\/p>\n Choose the ViO design because it solves a real jobsite problem, not simply because zero tail swing sounds desirable.<\/p>\n The ViO name has existed for decades. Yanmar states that the series began in 1993, and multiple generations have followed since then.<\/p>\n As a result, used machines from Japan can have:<\/p>\n For example, the current ViO30-7 and ViO35-7 differ technically from older ViO30-6 and ViO35-6 machines. Yanmar introduced the -7 generation with updated travel, swing and hydraulic characteristics.<\/p>\n Always confirm the complete model suffix and serial number before comparing two machines.<\/p>\n Many overseas buyers want to use breakers, grapples, quick couplers or other attachments.<\/p>\n Yanmar offers different attachment and quick-hitch configurations across the ViO range. The exact hydraulic arrangement can affect whether a machine fits the buyer’s intended work.<\/p>\n Before buying for attachment use, confirm:<\/p>\n Do not assume attachment compatibility because hydraulic pipes are visible in photographs.<\/p>\n Compact excavators turn and reposition frequently, especially on restricted sites. This can create substantial wear in the crawler system.<\/p>\n Inspect:<\/p>\n A recently replaced rubber track does not prove the complete undercarriage is in good condition.<\/p>\n Boom swing is an important function on compact excavators working beside structures and boundaries.<\/p>\n Check the pivot area, cylinder, pins and hydraulic hoses. Operate the function in both directions where possible and look for excessive movement or leakage.<\/p>\n Inspect cylinder rods for scratches, pitting and corrosion. Look for oil around seals, fittings and hoses.<\/p>\n During operation, watch for slow response, jerky movement or excessive drift.<\/p>\n Check bucket linkage, boom and arm connections for excessive movement.<\/p>\n Some play is normal on a used excavator. Excessive looseness can affect digging accuracy and create future repair costs.<\/p>\n Where possible, inspect a cold start. Look for difficult starting, unusual smoke, unstable idle and abnormal mechanical noise.<\/p>\n Check for:<\/p>\n Later ViO45 and ViO55 generations use common-rail and DPF-equipped diesel engines in the current Japanese specification. Buyers should consider the availability of suitable maintenance support in the destination country.<\/p>\n A ViO excavator with fewer operating hours is not automatically the better purchase.<\/p>\n Previous use matters. A landscaping machine may have experienced a very different workload from a machine that spent years using a hydraulic breaker.<\/p>\n Compare operating hours with:<\/p>\n The physical condition should be consistent with the hour meter reading.<\/p>\n Not every ViO is a normal bucket excavator.<\/p>\n For example, Yanmar offers a ViO55-6C G&W forestry specification. The manufacturer lists machine masses from 5,730 kg depending on crawler and operator-station configuration, compared with 5,150 kg for the basic ViO55-6C canopy rubber-crawler machine.<\/p>\n The forestry version can include grapple and winch equipment, protection structures and different hydraulic requirements.<\/p>\n This matters when buying used machinery because a specialized machine can have a completely different working history and shipping profile from a standard excavator.<\/p>\n Yanmar publishes model-specific lifting charts for several ViO machines.<\/p>\n Lifting capacity changes according to:<\/p>\n Therefore, there is no single \u201cViO lifting capacity\u201d figure that applies across the series.<\/p>\n If lifting pipes, materials or other loads is part of your planned work, identify the exact model and configuration and use the correct manufacturer chart. Local lifting regulations should also be checked.<\/p>\n The large size range within the ViO family means shipping requirements vary significantly.<\/p>\n A ViO12 can have a narrow variable undercarriage and weighs around the 1-ton class, while a standard ViO55-6C exceeds 5 tonnes and is almost 2 metres wide.<\/p>\n Before requesting an international freight quotation, confirm:<\/p>\n Container, RORO, flat rack or other shipping arrangements may be considered depending on machine dimensions, destination, port, shipping line and current shipping conditions. The same transport method should not be assumed for every ViO model.<\/p>\nWhat Makes the Yanmar ViO Series Different?<\/h2>\n
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Start by Choosing the Correct Size Class<\/h2>\n
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\n \nRepresentative Model<\/th>\n Approximate Machine Class<\/th>\n Bucket Capacity<\/th>\n Rated Output<\/th>\n Main Buying Priority<\/th>\n<\/tr>\n<\/thead>\n \n ViO12-2A<\/td>\n About 1 tonne<\/td>\n 0.028 m\u00b3<\/td>\n About 9 kW class<\/td>\n Very narrow access<\/td>\n<\/tr>\n \n ViO20-6<\/td>\n About 2 tonnes<\/td>\n 0.06 m\u00b3<\/td>\n 14.3 kW<\/td>\n Compact utility and property work<\/td>\n<\/tr>\n \n ViO25-6C<\/td>\n About 2.5 tonnes<\/td>\n 0.08 m\u00b3<\/td>\n 15.2 kW<\/td>\n Transportability plus greater capacity<\/td>\n<\/tr>\n \n ViO30-7<\/td>\n About 3 tonnes<\/td>\n 0.09 m\u00b3<\/td>\n 18.5 kW<\/td>\n General compact construction<\/td>\n<\/tr>\n \n ViO35-7<\/td>\n About 3.5 tonnes<\/td>\n 0.11 m\u00b3<\/td>\n 18.5 kW<\/td>\n More stability and digging capability<\/td>\n<\/tr>\n \n ViO45-6C<\/td>\n About 4.5 tonnes<\/td>\n 0.14 m\u00b3<\/td>\n 27.5 kW<\/td>\n Construction and utility productivity<\/td>\n<\/tr>\n \n ViO55-6C<\/td>\n About 5 tonnes<\/td>\n 0.16 m\u00b3<\/td>\n 33.5 kW<\/td>\n Higher-capacity compact excavation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ViO10 and ViO12 Class: Access Comes First<\/h2>\n
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ViO20 and ViO25: A Useful Step Up<\/h2>\n
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ViO30 and ViO35: General-Purpose Compact Excavators<\/h2>\n
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\n \nItem<\/th>\n ViO30-7<\/th>\n ViO35-7<\/th>\n<\/tr>\n<\/thead>\n \n Basic machine mass<\/td>\n 2,990 kg<\/td>\n 3,490 kg<\/td>\n<\/tr>\n \n Bucket capacity<\/td>\n 0.09 m\u00b3<\/td>\n 0.11 m\u00b3<\/td>\n<\/tr>\n \n Rated output<\/td>\n 18.5 kW<\/td>\n 18.5 kW<\/td>\n<\/tr>\n \n Maximum digging depth<\/td>\n 2,770 mm<\/td>\n 3,060 mm<\/td>\n<\/tr>\n \n Transport width<\/td>\n 1,550 mm<\/td>\n 1,550 mm in the referenced Japanese specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ViO45 and ViO55: Productivity Becomes More Important<\/h2>\n
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Which ViO Size Should an Overseas Buyer Choose?<\/h2>\n
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\n \nIf Your Main Priority Is…<\/th>\n Start Comparing…<\/th>\n<\/tr>\n<\/thead>\n \n Very narrow access<\/td>\n ViO10 \/ ViO12 class<\/td>\n<\/tr>\n \n Light utility and residential work<\/td>\n ViO17 \/ ViO20 class<\/td>\n<\/tr>\n \n Compact machine with more capability<\/td>\n ViO25 class<\/td>\n<\/tr>\n \n General small construction<\/td>\n ViO30 \/ ViO35 class<\/td>\n<\/tr>\n \n Higher daily productivity<\/td>\n ViO45 class<\/td>\n<\/tr>\n \n Maximum capacity within the common 5-ton ViO range<\/td>\n ViO55 class<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Why Zero Tail Swing Matters More in Some Markets Than Others<\/h2>\n
Check the Exact Generation Before Comparing Prices<\/h2>\n
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Attachment Piping Can Change the Value of a Used ViO<\/h2>\n
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Used ViO Inspection: What Matters Most?<\/h2>\n
1. Tracks and Undercarriage<\/h3>\n
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2. Boom Swing System<\/h3>\n
3. Hydraulic Cylinders and Hoses<\/h3>\n
4. Pins and Bushings<\/h3>\n
5. Engine and Cooling System<\/h3>\n
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Operating Hours Do Not Tell the Complete Story<\/h2>\n
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Special ViO Configurations Need Separate Evaluation<\/h2>\n
Lifting Capacity Must Be Taken From the Correct Chart<\/h2>\n
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Shipping a Yanmar ViO Excavator from Japan<\/h2>\n
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A Practical ViO Buyer Decision Checklist<\/h2>\n
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