Used Equipment Test: Kubota KX41-3 excavator
Lyndsay Whittle hires a Kubota KX413 mini excavator to make a hardstand, and finds that it punches above its 1.8-tonne weight
Having decided I needed to make a hardstand on which to park my growing collection of restored trucks, I spent a couple of days pondering how I was going to dig out an area of clay about 15m by 12m in area.
One option was to call in a local contractor, allowing me to go about my normal business while the work got done.
This option seemed like the best use of my time at first, but nowhere near as much fun as hiring a digger and doing the job myself. Besides, it had been several months since I sat at the controls of anything with tracks and I needed to keep my hand in.
I was well aware that by doing the job myself I’d be doing someone else out of work. But on the other side, I’d be putting money in the pocket of the firm I was hiring the digger from.
So, having salved my conscience on the morality front, I headed to Auckland’s DiggityDog Hire to pick up a 1.8-tonne Kubota KX41-3 excavator.
When I turned up at the depot, I did think for a moment about unloading the digger from its tandem trailer and putting it up on the deck. However, considering the logistics of releasing the tie-downs and relocating the rock bucket and spade, I figured it’d be best to simply hook the trailer onto the truck and head off to start work as quickly as possible.
When I unloaded the little Kubota at the worksite, I looked at the size of the task and found myself wishing that I’d hired a machine closer to 5 tonnes. But I then realised my truck could only legally carry a 3.5-4-tonner anyway.
ON THE JOB
As I don’t operate diggers on a daily basis, I knew the first half hour or so at the controls wouldn’t be all that productive, so I began by removing a thin top layer of scoria.
It had been exceptionally wet in this corner of the country over the previous few weeks, which made the going tough as I had to dig down in some pretty sticky clay to 300mm in places, although this was tempered by a better-quality base where 150mm would suffice.
I did, however, get a bit of exercise during the day from climbing on and off the machine to spade the clay from the bucket.
It was clear this Kubota KX41-3 was used a fair bit in its life, but it handled the job with ease.
I found I only ever needed to run the engine at between half and three-quarter revs, except when I needed extra speed to get it from one part of the property to another.
With a reach of about 3m fully extended, I found I could easily make a cut then slew the machine around 180 degrees and dump the clay in a pile.
Then all I had to do when I had enough of a stockpile was to reposition the machine and repeat the process twice to make the final placement in what turned out to be a feature embankment, about 15m away.
I ordered three cubes of heavy-grade fill and the same amount of 40mm aggregate from a local supplier and asked them to throw a couple of metres of mulch on the second load, which I mixed into the clay along with some scoria I’d scraped from the surface earlier.
Placement of the base course was a simple reversal of the methodology used in the removal of the clay, with the entire job being completed over two days.
This included some extra time to extricate the base course supplier’s truck, which hit a soft spot and sunk like a stone, necessitating the dumping of the load where the truck sat.
This apparent negative was turned into a positive by the extra practice I got out of removing the load from under the truck, then positioning the machine to get the truck out.
THE BOTTOM LINE
I was impressed by what the little Kubota K41-3 excavator could achieve. When I first put the machine to work, I did think I’d brought a knife to a gun fight.
Given the machine had already clocked up quite a few hours during its working life, it operated like a relatively new purchase, which is a testimony for not only its lineage but also to the service regime it has experienced.
I was extremely impressed by what the machine could do and the smoothness of its operation. As an added bonus, it was quiet.
Naturally, the machine had other attachments, such as a rock bucket and spade, which weren’t required on this job. It also had a foot-operated auxiliary for a breaker and expandable tracks that I left in the expanded position.
I finished the job off with the 900mm-wide blade before giving the little Kubota KX41-3 the washdown it deserved and returning it to the crew at Diggity Dog.
There is just one more anecdote that I must share. It involves a vibrating roller and one do-it-yourselfer who forgot just how sensitive those walk-behind rollers can be.
Having unloaded the roller from the trailer, the desire to move it in the opposite direction resulted in some fool pulling the trigger a little less gingerly than he should have, which led to the nursing of a sore shoulder for a few days.
But that’s a story for another time.
It was clear this Kubota KX41-3 had had a fair bit of use in its life, but it handled the job at hand with ease
CHECK THE DATA
Rockbreaking equipment by definition takes a hell of a beating, but the RamData system from Rammer is designed to help operators avoid incorrect operation and extend the life of their tools.
RamData uses electronic sensors to record impacts and breaking times during normal operation. The information can then be downloaded and analysed by a Rammer dealer to determine if the hydraulic hammer has been operated correctly.
The system also helps technicians servicing hydraulic hammers by providing service history, service interval and working history information, allowing technicians to maintain a regular servicing schedule. http://bit.ly/TradeEarthRamData
Lincom Group has been recognised by mobile crushing and screening equipment provider Powerscreen with its Regional Dealer of the Year (Australia and Asia) 2016 award for the second consecutive year.
The award rewards distributors for achievement in the areas of customer support, machine and parts sales targets, financial management and commitment to the Powerscreen brand – which is part of the Terex Corporation. http://bit.ly/TradeEarthLincom
Continental and Caterpillar have signed an agreement to equip Cat off-highway trucks with Continental rigid dump truck (RDT) master tyres and to work together on the design of new tyres for Cat products.
The agreement covers Cat off-highway truck model series 770 to 775 and tyres in sizes 18.00R33, 21.00R33 and 24.00R35. http://bit.ly/TradeEarthtyre
1. The Kubota KX41-3 mini excavator from DiggityDog Hire in NZ
2. Hooking the trailer up was a lot easier than loading the digger onto the tray 3. A mix of heavy-grade fill and 40mm aggregate formed the basecourse 4. A couple of metres of mulch was mixed into the clay along with some scoria scraped from the surface 5. The KX41-3 is driven by a Kubota D902-E3 engine throwing out 12.7kW