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Slideshows with captions

Slideshows with captions / We are converting our published articles into slideshows with printed captions

Terex scrapers / These Terex scraper images were published in conjunction with machine profiles in Contractor mag.

Caterpillar's classic tractors

Caterpillar's classic tractors / The classic Cat tractors have all been profiled in Contractor magazine. Richard Campbell also blogs at www.contrafedupdate.me

Caterpillar scrapers: classic machines

Caterpillar scrapers: classic machines / Classic Caterpilar scrapers profiled in Contractor magazine.

Clark-Michigan dozers

Clark-Michigan dozers / Machinery

Wabco scrapers / The Wabco 222 scraper was profiled in November 2009's issue.
The 101F was profiled in December 2010. The 333 was profiled in May 2011. The 339F in February 2014.

early Kato excavators

early Kato excavators / Well known for the quality of its mobile cranes, Kato, of Japan, was also a pioneer in the field of hydraulic excavators, and the second Japanese manufacturer to export them commercially. Pictures and captions were published in June 2017's Contractor magazine.

Visual highlights from August's Contractor

Visual highlights from August's Contractor / The main features from August

Forgotten earthmoving equipment brands

Forgotten earthmoving equipment brands / Equipment manufacturing companies such as #Garwood #Heil #Eimco #Isaacson
#Wooldridge #LaPlant #Aveling-Barford #Tractomotive: all have been profiled by Richard Campbell in Contractor magazine.

Classic Machinery

Heavy Haulage board

Heavy Haulage board / Heavy Haulage NZ are part-owners of Contrafed Publishing.

National Excavator Operator Competition 2017

National Excavator Operator Competition 2017

Crane board / Crane Association of NZ are part-owners of Contrafed Publishing.

Energy NZ Magazine

Energy NZ Magazine / Images we like from Energy NZ

Articulated Dump Trucks

Articulated Dump Trucks

Porter Group machinery

Porter Group machinery / Porter Group equipment profiled in Contrafed's publications

John Deere / John Deere equipment profiled in Contractor magazine

Wirtgen equipment

Wirtgen equipment / Wirtgen product profiled in Contractor and Q&M

Volvo Construction

Volvo Construction / Volvo equipment profiled in Contractor magazine.

Terex wheel loaders

Terex wheel loaders / Terex loaders profiled in Contractor magazine. Watch our clip at
http://bit.ly/2dyD7kz

Hitachi Machinery

Hitachi Machinery / Hitachi Product featured in Q&M and Contractor. Cable Price NZ Ltd (owned by Hitachi ) imports and distributes product in NZ.

Allis-Chalmers classic tractors

Allis-Chalmers classic tractors / Tractors profiled in Contractor magazine. These photos and captions accompany articles on classic Allis-Chalmers tractors.

Magazine features

Magazine features / Photos published in NZ Contractor magazine features

Caterpillar / Caterpillar products profiled in Contractor and Q&M

Quarrying and Mining magazine

Quarrying and Mining magazine / Q&M material is posted to this board.

Machinery board

Machinery board

Major NZ projects

Major NZ projects

Magazine covers

Magazine covers

Field Days 2017

Field Days 2017 / Regional Excavator Operator Competition at Mystery Creek- June 16 & 17th 2017.

Komatsu equipment

Komatsu equipment / Equipment reviewed by Contrafed

2015 Classic Machine clips

2015 Classic Machine clips / Clips created from pictures published in Contractor magazine.

Allis-Chalmers classic motorscrapers

Allis-Chalmers classic motorscrapers / Scrapers profiled in Contractor magazine

National Excavator Operator Competition 2015

National Excavator Operator Competition 2015 / The annual competition to find NZ's best multi-skilled operator

Mississippi Road Supply Co.

Mississippi Road Supply Co. / Specialising in assembled machines, primarily for the US military, the Mississippi Road Supply Company (MRS) produced a range of motorscrapers including the monstrous Model 250.

2007 Classic Machine clips

2007 Classic Machine clips / Pictures published in Contractor magazine have been turned into clips.

The Euclid range of classic motor scrapers

The Euclid range of classic motor scrapers / Euclid scrapers profiled in Contractor magazine. This board includes images of the S-7, S-13 and twin-scrapers the TS-18, TS-24 and TS-32.

Wabco 229 series scrapers

Wabco 229 series scrapers / Wabco redesigned its Model-C scraper to incorporate hydraulic controls. The redesigned machine is profiled in Contractor Magazine's August 2016 issue. These images were published with the article.

Euclid classic tractors

Euclid classic tractors / Classic machinery-pictures of Euclid's earthmoving tractors

International-Harvester classic tractors

International-Harvester classic tractors / The TD20, TD20B and TD24 classic tractors- photos and text by Richard Campbell

Schield's Bantam excavator

Schield's Bantam excavator / The C-35 Bantam was an extremely popular excavator model and thousands were sold. It was simple and easy to maintain.

Wabco 111 series scraper

Wabco 111 series scraper

John Deere motorscrapers

John Deere motorscrapers

Clark-Michigan scrapers

Clark-Michigan scrapers

Classic Towed Scrapers

Classic Towed Scrapers / Classic scrapers reviewed by Richard Campbell- these images were published in conjunction with articles published in Contractor magazine.

Terex wheel and track loaders

Terex wheel and track loaders / Terex

Hewco LD3 scoopmobile

Hewco LD3 scoopmobile / This rather interesting piece of machinery can trace it’s origins through three decades and three countries: the USA, Australia and New Zealand.
Originally designed by Mixermobile Inc in the USA, the original machine was marketed as the Scoopmobile model LD3 and was powered by a General Motors 3-71, 3-cylinder diesel. It first appeared in 1959 and carried a one cubic yard bucket.

International Payhaulers

International Payhaulers / These Payhaulers have been profiled in Contractor magazine.

2013 Classic Machines clips

2013 Classic Machines clips / Clips made from pictures published in Contractor magazine.

International-Harvester E270 Payscraper 2

International-Harvester E270 Payscraper 2

International Harvester payloaders

International Harvester payloaders / Images of Payloaders

International-Harvester classic motorscrapers

International-Harvester classic motorscrapers / Pictures of International 270, 295, 412 & 433 scrapers published in Contractor magazine. Read reviews at www.contractormag.co.nz/classicmachines

Euclid dump trucks

LeTourneau wheel tractor dozers

LeTourneau wheel tractor dozers

LeTourneau wheeled bulldozer LW12

LeTourneau wheeled bulldozer LW12

2008 Classic Machines clips

2008 Classic Machines clips / pictures published in Contractor have been converted into clips

Caterpillar wheel loaders

Caterpillar wheel loaders

Auckland International Airport

Auckland International Airport

2017 Content - covers and feature articles

2017 Content - covers and feature articles / Published content from the magazine

Transmission Gully Album: May 2017

Transmission Gully Album: May 2017

LeTourneau classic scrapers

LeTourneau classic scrapers / These pictures were published accompanying machinery reviews in Contractor magazine. The L-Series Pacemaker review was published in October 2006.

Forgotten Equipment Manufacturers

Forgotten Equipment Manufacturers

2015 Classic machine slideshows

2015 Classic machine slideshows

2014 Classic Machines with captions

2014 Classic Machines with captions

Caterpillar excavators

Caterpillar excavators / Caterpillar 225 shots from Contractor magazine

2016 Clips with captions

2016 Clips with captions

Puhoi to Warkworth Project page

Puhoi to Warkworth Project page

Portugese captions

Portugese captions

Model D 'Flying' Tournapull scraper

Model D 'Flying' Tournapull scraper / During WWII the Army called for an “air transportable earthmover” and RG LeTourneau took up the challenge.
THE FIRST LETOURNEAU Model D Tournapull was rolled out in 1942.

It was then sent to the US Army’s proving ground at Fort Belvoir, Virginia for trials, which were conducted by the Corps of Engineers. Following these tests, which proved that the little machine was capable of doing what the Army required, it was passed on to the Airborne Equipment Engineers for air drop suitability testing.

Allis-Chalmers Model HD-6 tractor

Allis-Chalmers Model HD-6 tractor / For a period of just under 20 years (1955-1974), Allis-Chalmers produced one of the most popular small track type tractors ever built, the model HD-6.

It was not the first successful small crawler that Allis-Chalmers had manufactured and in fact replaced another remarkably popular machine, the model HD-5, which had been the first of Allis-Chalmers’ post WWII tractors to be introduced, in 1946.

Caterpillar's DW-20 scraper

Caterpillar's DW-20 scraper / First of the real scraper tractors was the Cat 21C, originally powered by a Roots blown Caterpillar D337 6-cylinder diesel which was produced from 1951 through to 1955.
Equipped with the Caterpillar No 20 scraper rated at 14 cubic yards struck and 22 cubic yards heaped, this was the model that paved the way for the rest of the series and it underwent a few modifications along the way.

Wabco's 339F scraper

Wabco's 339F scraper / With sales of its electrically operated B series Tournapull scrapers slowing down significantly, Wabco realised that it was time to upgrade its large open-bowl scraper line or they were about to get left behind in the large motor scraper market.

International-Harvester's TD-30 tractor

International-Harvester's TD-30 tractor / In the years immediately following WWII there was an explosion of sorts in the development of the track type tractor, with several well established companies vying for the title of biggest, best and most powerful.
ALLIS-CHALMERS WAS THE FIRST to offer a really big track-type tractor in the form of its HD19. Things didn’t stay that way for too long however, as International Harvester launched its very popular TD24 in 1947 which quickly assumed the role of “biggest, best and most powerful”.

Big Boys Toys 2017

Big Boys Toys 2017 / Big Boys Toys is a three day event for fans of machines and cars. CCNZ Auckland held its annual Excavator Operator Competition during BBT2017..

Forgotten companies: Tractomotive

Forgotten companies: Tractomotive / Among the wheel loader manufacturers flourishing in the US market of the late 40s was Tractomotive, a wholly owned division of Allis-Chalmers.

Allis-Chalmers had had an association with Tractomotive for a period of time before A-C acquired them outright in 1959.

Tractomotive built the pipelaying side booms, rippers and loader attachments for Allis’ track type tractors and also utilised Allis-Chalmers wheel tractors as a base for its own wheel loaders. It was a very convenient marriage.

Caterpillar's 933 traxcavator

Caterpillar's 933 traxcavator / Following the acquisition of the Trackson Corporation by Caterpillar in 1951, Caterpillar continued to use Trackson’s loader attachments fitted to D2, D4, D6 and D7 tractors.
Trackson had been founded in 1922 in Milwaukee, Wisconsin, and built a plethora of attachments for not only Caterpillar but other manufacturers as well.

Caterpillar's DW-10 scraper

Caterpillar's DW-10 scraper

The reopening of Kaikoura line- September 2017

The reopening of Kaikoura line- September 2017 / THE FORCE OF the November 14 Kaikoura earthquake last year dwarfed that of the 2010-2011 quakes that destroyed Christchurch, raised the seabed along the coast and left the land adjacent to it looking as if it had been gouged by a giant plough.

Somewhere amid the furrows was a railway line, ripped to pieces in more than 900 places, many of them alongside the equally shattered main state highway, and Kaikoura was totally isolated.

Terex 82-50 tractor

Terex 82-50 tractor / The Terex 82-50 was designed to compete with the Caterpillar D9G and also replace the company’s existing model 82-80 (TC-12), which had been in continuous production since 1955 and was, by then, quite outdated.

Production model Terex 82-50s made their debut in 1973 to much fanfare. Tipping the scales at 48 tons fully equipped and powered by a GM Detroit Diesel 12V-71T turbocharged V-12 diesel putting out 370 flywheel horsepower, the 82-50 certainly sounded as powerful as it looked!

Forgotten manufacturers: LaPlant-Choate

Forgotten manufacturers: LaPlant-Choate / Along with LeTourneau, Caterpillar and Allis-Chalmers, LaPlant-Choate was responsible for a lot of the innovations found in earth-moving equipment today, particularly in the field of hydraulics.
Established in 1911 in Cedar Rapids, Iowa, LaPlant-Choate originally got its start in the construction industry by building house moving equipment. This expanded to the manufacture of rudimentary bulldozer blades by 1927 and then on to towed scrapers, compaction equipment and rippers.

Terex's Model S-35E scraper

Terex's Model S-35E scraper / Euclid began investigating a single-engined elevating scraper in 1966.
Tentatively rated at 32 cubic yards heaped capacity, the machine which used the tractor unit of an S-24 motor scraper was sent off to the company’s proving grounds at Milford, Michigan for evaluation.

Forgotten manufacturers: Garwood

Forgotten manufacturers: Garwood / Some heavy haulage operators may be familiar with the name GarWood as a premier manufacturer of heavy duty towing winches used on transporter-equipped trucks. However, it may come as a bit of a surprise to learn that GarWood was once a major producer of blades, scrapers, cable controls and rippers for the earthmoving industry.

International-Harvester's TD-25 tractor

International-Harvester's TD-25 tractor / Following on from its very successful model TD24, International Harvester introduced its successor, the TD25 in 1959. Rather than being a scaled up version of the TD24, the TD25 was a completely new machine.

The Vickers 'Vigor' VR-180 tractor

The Vickers 'Vigor' VR-180 tractor / As a result of their experience manufacturing tanks during WWII, Vickers-Armstrong of Newcastle, England decided to build a track-type tractor to take on the Americans.
A successful product would be a boost to Britain’s war ravaged economy and also stem the flow of imported tractors which used up valuable overseas funds.

Clark-Michigan's model H110 scraper

Clark-Michigan's model H110 scraper / Working on the principle that two engines are better than one, Michigan introduced their model 110HT twin powered elevating scraper in 1970.
A modification of their already successful model 110-11 elevating scraper, the 110HT featured a bigger bowl, larger tires and of course, loads more power to handle grades and poor underfoot conditions.

Euclid's model TS-24 scraper

http://contractormag.co.nz/classic-machines/classic-machines-caterpillars-no-12-motor-grader/

3Tourneau's Model D Tournapull

3Tourneau's Model D Tournapull / Descended from the original Le Tourneau ‘D’ Pull which dated back to 1946 and before the sale of the company to Westinghouse in 1953, the Model D was marketed as a general purpose all-round scraper for small jobs, clean ups, county roading etc., and was offered with a range of optional attachments. The machine was also legally roadable anywhere, enhancing its appeal.

Caterpillar's model 630A scraper

Caterpillar's model 630A scraper / Although the Cat 630A was a significant improvement on its predecessor, it didn’t have hydraulic controls and was soon surpassed by the 630B.
In order to remain competitive in the rapidly evolving motor scraper marker, early in 1959, Caterpillar began a fairly radical redesign of their popular DW20 series G tractor scraper.

The end product was the model 630A, introduced in 1960, second in the 600 series of Cat motor scrapers (the first was the 619).

Allis-Chalmers model TS-300 scraper

Allis-Chalmers model TS-300 scraper / The TS-300 was not an original Allis-Chalmers designed machine. Following WWII, the LaPlant-Choate Manufacturing Company of Cedar Rapids, Iowa, a long time builder of dozer blades, rippers and towed scrapers, wished to follow competitor Le Tourneau’s example and build a self propelled scraper. The prototype was ready for testing by mid 1945 and put into full scale production in 1947.

International-Harvester's model E200 scraper

International-Harvester's model E200 scraper / One of the first companies to realize the benefits an elevating scraper could offer the smaller earthmoving contractor was International Harvester, which introduced the model E200 in 1966. By Richard Campbell
Fast, maneuverable and legally roadable just about anywhere, the nine cubic yard E200 elevating scraper was sold in substantial numbers in the USA and around the world.

Caterpillar's model 666 scraper

Caterpillar's model 666 scraper / The largest production twin engined motor scraper to be offered by any earthmoving equipment manufacturer, the Caterpillar model 666, was introduced in 1962 along with a raft of other ‘600 series’ motorscrapers that Caterpillar had been developing.

Boasting a whopping 54 cubic-yard-heaped bowl, the 666 was also offered as a single engined scraper, which was known as the 660.

Euclid's TS-32 scraper

Euclid's TS-32 scraper / Developed from the single-engined model TS-28 (which also spawned an experimental TS-28), the Euclid TS-32 was the largest twin-powered, open bowl motorscraper in the Euclid product range.
Released for sale to the world’s contractors in 1966, the TS-32 suffered a somewhat protracted development period, which unfortunately lasted well into the machine’s operational career.

Caterpillar's model 619 scraper

Caterpillar's model 619 scraper

Tournapull's L-series Pacemaker scrapers

Tournapull's L-series Pacemaker scrapers / When RG Le Tourneau sold his earthmoving equipment manufacturing business to Westinghouse Air Brake Co (Wabco) in 1953, one of the clauses in the agreement was that Le Tourneau would not build any equipment for 5 years.

This didn’t stop RG from designing and by 1958 when the clause expired he had a range of new equipment ready to go – radically different than anything that had been seen previously.
The new range of machines were called the L-series Pacemakers, or 'electric diggers.'

Euclid's SS-12 scraper

Euclid's SS-12 scraper / The Euclid SS-12 was one of the first machines manufactured in England by the fledgling Euclid Great Britain Ltd. It was based on the US-produced, model 77FDT, three-axle scraper, and had a 12 cubic yard struck rating.

Machines imported from the UK were either powered by a Rolls Royce (model B6FDT), Leyland (model B8FDT), or Cummins (B10FDT) diesel engine.

International-Harvester's 295 PayScraper

International-Harvester's 295 PayScraper / International Harvester introduced its model 295 Payscraper to replace the former model 2T-75, which had been a good seller for International.

However, in the light of rapidly advancing technology the 2T-75 was not entirely satisfactory so International began the design of a totally new machine.

Using their recently developed IH model DT-817T engine, the 295 was put into mass production during 1962.

Euclid's S-12 scraper

Euclid's S-12 scraper / First introduced in 1955, the S-12 was destined to be the last two-axle Euclid scraper with a direct drive transmission. For reasons known only to Euclid, it was also their only production two-axle scraper never to be offered with a powershift transmission.

Bearing a strong family resemblance to other machines in the Euclid scraper range, the S-12 was rated at 12 cubic yards struck and 16 cubic yards heaped. During its production life there were two variations of open bowl scraper.

Allis-Chalmers Model 562 scraper

Allis-Chalmers Model 562 scraper / Based around a modular concept which allowed for the addition of an extra scraper bowl if necessary, the Allis-Chalmers 562 was developed from the existing model TS-460 single engined, open bowl scraper with which the tractor unit of the 562 shared many major components.

It was Allis-Chalmers’ first attempt at a twin powered machine and the company had great hopes for the 562.

Aveling-Barford's motor graders

Aveling-Barford's motor graders / Aveling-Barford was formed in 1934 from the merger of two long established British companies – Aveling & Porter (est.1862) and Barford & Perkins (est. 1860). Between them they manufactured a wide range of agricultural and contractors plant including a classic piece of construction machinery, the road roller.

Wooldridge scrapers: forgotten earthmoving manufacturer

Wooldridge scrapers: forgotten earthmoving manufacturer / Wooldridge is not a name many pinners will be familiar with and yet it was an important evolutionary branch of the motor scraper ‘tree’. Mack Wooldridge (1890-1962) was a contemporary of Robert LeTourneau and was trained as an auto mechanic. He was fascinated by heavy equipment and was one of the pioneers in attaching a workable bulldozer blade to a track type tractor.

Euclid's 82-40 tractor

Euclid's 82-40 tractor / The Euclid 82-40 was added to the range of Euclid track type tractors during 1966 and joined the already established 82-30 (introduced 1958) and TC-12/82-80 (introduced 1954).

As can be seen from the model number, the 82-40 fitted between the other two machines and was, in industry terms, a D8 sized tractor, weighing in, fully equipped, at around 35 tons.

Caterpillar's Model 631a scraper

Caterpillar's Model 631a scraper / Having put in much research and development to provide a worthy successor to the DW21 series of motor scrapers the 631A, while carrying a similar payload, was physically larger than its predecessor and considerably more refined.

One of the big selling features over the previous DW21 was the addition of Caterpillar’s newly developed powershift transmission and planetary final drives in place of the former’s manual transmission and bull gear and pinion final drives.

Euclid's S-18 scraper

Euclid's S-18 scraper / First introduced in 1954 the Euclid S-18 was produced in two distinct versions. A classic example of a scraper that looked ‘right’ for the job, the S-18 was a massive brute of a machine powered by a General Motors 6-110, 6-cylinder inline supercharged diesel, initially rated at 300 horsepower. This was raised to 336 horsepower not long after the machine was put into full scale production

Euclid's Model TS-14 scraper

Euclid's Model TS-14 scraper / Euclid began design studies on what would become the TS-14 in 1958. There was a definite gap in the market for a machine of this type and size and it would complement the company’s larger model TS-24 nicely.

After 10 prototypes had been tested under a variety of conditions the first production machines were released in 1960. This was the model 6UOT-38SH.

Operation manuals

Operation manuals

International-Harvester's model 560 Payloader

International-Harvester's model 560 Payloader / Wielding a 6.5 to 12 cubic yard bucket, the 560 Payloader was a big wheel loader for its day and was a contemporary of the Caterpillar 988B, Fiat-Allis 945B, Terex 72-71 and Michigan 275A.

Prior to the 560s introduction, the largest wheel loader in the International Harvester range had been the Hough H400, which had built up a very creditable reputation as a rugged and reliable wheel loader since its introduction in 1963.

Diecast Construction Models

Diecast Construction Models

Wabco's 101F scraper

Wabco's 101F scraper / The Wabco 101F made its first appearance in 1970.
An entirely new design, the 101F bore no family resemblance to any other scraper in the Wabco range and was entirely hydraulically controlled.

Instead of replacing the company’s existing 11 cubic yard model 111A elevating scraper, the slightly smaller nine cubic yard 101F complemented it.

Caterpillar's Model D9 tractor

Caterpillar's Model D9 tractor / Following the end of WWII Caterpillar began experimenting and testing of several large prototype track type tractors and the D9 was the end result.

Other manufacturers had also been experimenting with larger tractors, notably Allis-Chalmers with its HD19 and International Harvester with the TD-24. Both rival companies had machines into the marketplace by 1947 but Caterpillar was looking at something even bigger.

Allis-Chalmers's model 260E scraper

Allis-Chalmers's model 260E scraper / As was the case with its rivals, the Allis-Chalmers 260E elevating scraper was based on the marriage of an existing conventional motor scraper tractor (the successful open bowl model TS-260) with an elevating scraper bowl, supplied by Hancock Manufacturing of Lubbock, Texas.

Hancock invented the elevating scraper design in the mid 1950s but the concept did not catch on straight away. It gained popularity with land development contractors who found it ideal for preparing land for irrigation.

YouTube marketing

YouTube marketing

International-Harvester's model E270 Payscraper

International-Harvester's model E270 Payscraper

LeTourneau's Model C Tournapull

LeTourneau's Model C Tournapull / The Model C Tournapull was the second of RG LeTourneau’s Tournapull range to appear (the first was the Model A).
His newly built factory in Peoria, Illinois produced the first Model C in April 1940. It looked quite unlike anything that had been seen before and, despite an initial hesitance on the part of the conservative contracting industry, this machine could shift dirt faster over longer distances than anything that was previously available.

Terex's Model S-11E scraper

Terex's Model S-11E scraper / In 1964 Terex (then known as Euclid) entered the elevating scraper market with an adaptation of their S-7 scraper tractor connected to a bowl supplied by Hancock.
Initially known as the S-7/12E2 or simply “S-7/Hancock”, the designation was officially changed following a minor upgrade to S-12E in 1967.

Marketing brochures for old equipment

Marketing brochures for old equipment

Euclid's C-6 tractor crawler

Euclid's C-6 tractor crawler / Introduced by Euclid in 1959 after extensive field testing, the C-6 (half of a TC-12) was classed as a D7-sized track type tractor. Rather individual in appearance, with its radiator in the back, the C-6 didn’t resemble any other track type tractors of the time. This did not detract from the machine’s performance however and the C-6 went on to establish a good reputation for strength and reliability.

International 2T-55 & 2T-75 PayScrapers

International 2T-55 & 2T-75 PayScrapers

Airport Runway work at Palmerston North

Airport Runway work at Palmerston North / Repair work project featured in September's @NZContractormag

Euclid's Model TC-12 tractor- the 'Big Twin'

Euclid's Model TC-12 tractor- the 'Big Twin'

Caterpillar's Model 641 scraper

Caterpillar's Model 641 scraper / Rated at 28 cubic yards struck and 38 cubic yards heaped the Caterpillar 641 was a quantum leap in Cat scraper design. Released in 1962 along with the models 630A, 631A, 632, 650, 651, 657, 660 and 666 the 641 sat roughly in the middle of the range capacity-wise.

In order to take best advantage of the new machine’s capabilities, Caterpillar had also developed a new range of engines and transmissions to cope with the higher horsepower requirements necessary to move these big beasts around.

Clark-Michigan wheel dozers

The Model C Tournapull

The Model C Tournapull

Allis-Chalmers Model HD21 tractor

Allis-Chalmers Model HD21 tractor

Isaacson Attachments

Isaacson Attachments / The Isaacson Iron Works was established in Seattle Washington by ex-Swede John Isaacson in 1906.

Initially providing steam boilers and logging accessories such as chokers, grapples and other cast implements for the logging industry in the Pacific Northwest, they branched out into tractor attachments after continual advancements and mechanization in the forest industry made some of their key money earners obsolete.

Caterpillar's model 623 scraper

Caterpillar's model 623 scraper / In 1972 Cat faced a problem. To remain competitive it needed to upgrade its J621 elevating scraper, which was itself an upgrade of the J619. A key criticism of the J621 was its poor performing elevator which was sluggish and which did not work well in tight packed or free flowing materials.
Caterpillar, which by now owned Johnson (the original manufacturer of the elevating mechanism for Cat’s J619 and J621) undertook a redesign of the bowl & elevator assembly to make it more “user-friendly”.

The Wabco 333 elevating scraper

The Wabco 333 elevating scraper / The Wabco 333FT could trace it’s roots to the original LeTourneau B Tournapull of 1940. Wabco began experimenting with large elevating scrapers in 1961 but it wasn’t until 1966 that a twin powered unit was put into production. This was the BT333F and it certainly raised eyebrows with its ability to shift dirt fast, under conditions which would be considered marginal for other elevating scrapers.
Continuing development of the type resulted in the B333FT (1969), with the 333FT appearing in 1970.

The Allis-Chalmers HD-41 tractor

The Allis-Chalmers HD-41 tractor / Having led the charge for larger, higher horsepower tractors following WWII, Allis-Chalmers was at the forefront of large tractor development when the model HD-41 was released in 1970.
A-C had been working on a ‘super dozer’ for a number of years, with initial prototype machines appearing in 1963. However it had to wait for some considerable time before engines of sufficient horsepower were available and the metallurgy and technology to manufacture such a large machine had been perfected.

The R-15 Euclid dump truck

The R-15 Euclid dump truck / In 1934 Euclid became the first manufacturer in the world to successfully produce a dedicated off highway truck. Prior to this time other manufacturers had offered dump trucks (notably Mack), but these were adaptations of existing on-highway vehicles and often fell to pieces under punishing conditions.

Euclid off-highway trucks were purposely manufactured for the hard jobs. Extremely ruggedly built and simple in design and construction, the R-15 could absorb a tremendous amount of punishment.

Caterpillar 225 excavator

Caterpillar 225 excavator /
The Cat 225 ran on a Caterpillar model 3208 direct injection V8 diesel rated at 125 horsepower.

Early industrial models of the 1160 destined for earthmoving applications were known as the model 3160 and did not have a very favourable reputation due to the fact that they did not have replaceable cylinder liners, making the cylinder block virtually a throw away item. This was addressed in the 3208 by cylinder liners that could be replaced.

Wooldridge range of scrapers

Wooldridge range of scrapers

2013 Clips with captions

2013 Clips with captions

CCNZ Conference 2017- slideshows

CCNZ Conference 2017- slideshows

2017 Clips with captions

2017 Clips with captions

2017 Hirepool Construction Excellence Awards

2017 Hirepool Construction Excellence Awards

Attachment manufacturers: Isaacson

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