Oliver Cletrac Model A

OLIVER "Cletracll GASOLINE OR DIESEL POWER

*TRACTORS OLIVER "Cletrac" Noi xiookx‘‘ Imp 0 ff//i/ii/ 1111W „Novrowo, tlib.!, 4,117/111 1111V NAAA .000,/, Mil!: 0 0/7//11/ WAV „4„.1106,wiml, 0//11117 110%A.V%%1%% /1(([ 1: A, 01////// " .% lohA.4,1k,..0... N.V.- /1 4,P0A%., ,,{//11l 11 ort/1" 7/ 1 114 IS POWER ON BOTH OLIVER "Cletrac" model "A" mu... CUT COSTS. The Model A Oliver "Cletrac" incorporates a balanced design that eliminates dead weight and increases actual capacity. This saves fuel, decreases wear and tear and so cuts maintenance costs. Yet, the large track area and many grousers provide positive traction in mud, sand, rock, clay—uphill and down! With higher protected clearance and Tru-Traction you get your work done when you want it done, and put more money in your pocket. SAVE TIME. Developing better than 80 per cent of its weight in drawbar pull, the Model A Oliver "Cletrac" does more work in less time. It keeps work up to schedule, eliminates overtime and extra crews, saves labor costs and gives you a larger profit. With ground pressure of approximately 5 pounds to the square inch— less than that of a man walking the Model A is always ready to go ... ready to handle your jobs in mud and soft fills . . . ready to put more money in your pocket.

Ili.N1010411 4,./Arir TI'#/////# NA! VIOL:16,16. ...... •■•■■•:101011.N. /Or kNN,:■■■■•■•■•■ ....... 1.•\ STANDARD MODEL Oliver "Cletrac" is known the world over for economy, dependability and the ability to "take it", regardless of operating conditions. Made in two widths, the standard model (AG and AD) has 42-inch track centers and the hillside model (AGH and ADH) has 50-inch track centers. LOGGERS SPECIAL—The Model A is also built for heavy duty use in the woods. The Model A Loggers Special is equipped with a demountable crank, integral combination crankcase and bellhousing guard, heavy duty lower track wheels, track wheel rock guards, special rear drive sprockets, 48-inch heavy duty forestry type bumper, front pull hook and heavy duty springs. 3 INCREASE CAPACITY. Tru-Traction Steering, an exclusive Oliver "Cletrac" feature, makes the Model A easy to handle, extremely maneuverable. Both tracks pull all the time, whether on turns or straight- aways. Oliver "Cletracs" roll around curves instead of twisting, thus consuming less power to turn and applying more power at the drawbar. Oliver "Cletracs" handle "off center" loads, such as ditching, trail building, widening the cut in snow removal, without twisting and whipping. Your operator has perfect control at all times and does a better all- around job. Only Oliver "Cletrac" offers Tru-Traction steering. WIDE GAUGE MODEL Both the standard model and wide model are fully equipped ready for your toughest job. There are no extras to buy—hood panels, steel radiator guard and crankcase guard—all standard equipment on the Model A Oliver "Cletrac." Thousands of farmers, orchardists, contractors, high- way officials know the economy, the dependability, the "built to take it" construction of the Model A Oliver "Cletrac". • The Model A has the capacity to pull a four-bottom plow in many soils, three-bottoms in practically any condition, a 10' double-action disc, a 16-foot combine. • On the industrial job, this same horsepower handles trail-building and bulldozing jobs, a 7- or 8-foot blade in light road construction and maintenance, pulls tubing, or bales medium depth oil and gas wells. Check the Model A yourself ... its sturdy main frame and track frame construction . .. the sound engineering of its exclusive steering . . . its perfectly balanced design . . . its V-Groove drop-forged track shoes with replaceable grousers or cleats. • Get up on the seat and drive it . . . experience for yourself its remarkable ease of operation . . . its finger tip control . . . its responsiveness to every operating requirement . . . the ample leg room . . . the visibility . . . the comfort of its upholstered seat. There's good reason why an ever-increasing amount of the world's work is done with Oliver "Cletracs". TRACKS AT ALL I TIrl

THE WORLD OVER!"

THE ROLLER CHAIN Shown at left is a section of a roller chain—the easiest running chain that has ever been developed and perfected. The roller chain incorporates rollers. That's why it is easier running and wears longer. The roller is free to turn on the bushing and more bearing area gives longer life. Oliver uses this principle in the Model A "Cletrac" tracks. OLIVER Cletrac TRACKS ARE BUILT LIKE A ROLLER CHAIN PIN BUSHING ROLLER OLIVER"Cletrac" TRACKS The Model A track is made up of 29 V-groove forged shoes, assembled with pins, bushings and rollers just like a roller chain. This type of construction provides greater bearing surface, greatly reduces wear and increases operating life. The track shoes are forged from metal especially heat-treated for long life. Side rails, where they contact the track wheels, are hardened to resist wear; they are machined both top and bottom to provide a flat surface for bolting grouser plates on top, and to provide a continuous smooth surface for the lower track wheels on the bottom. The face of the shoes is toughened to resist shocks and strains. This toughening treatment is carried out in especially designed furnace equipment under precise control. The track pin holes in track rails, and the grouser bolt holes are drilled while the shoe is rigidly held in a jig fixture. This assures perfect alignment of track parts when assembling the tracks. The accurate machining of Oliver "Cletrac" tracks results in a sturdier track, more positive traction, less weaving between parts and much longer life for both track and track wheels. Any suitable grouser may be attached directly to the track shoe. The grousers bolt securely into a deep V-groove which is machined in each track shoe; strains on the grousers are transmitted directly to the track shoe by the V-groove feature, thus eliminating shearing strains on the bolts. Track shoe pins, bushings and rollers are Tocco hardened . . . a form of heat treatment which gives uniformly hard, long-wearing surfaces backed up by a tough shock-resistant core. The track pins have a shoulder at one end which insures a perfect fit into the track shoe and simplifies replacements.

Sturdy construction and accurate machining of V-groove track shoes used in the Oliver Model A "Cletrac" tracks is typical of advanced engineering used throughout the tractor. Side rails are forged from alloy steel, heat-treated for strength. Surfaces which contact the track wheels are especially hardened to resist wear. Side rails of the track are machined, both top and bottom, to give a perfectly flat surface for bolting on grouser plates and to provide a continuous smooth surface for the lower track wheels. A deep V-groove is machined in the top of each side rail and each grouser plate is formed to lock securely into this V-groove, fitting perfectly. Grouser plates are held securely to the track by four heat-treated alloy steel bolts, but strain of traction is taken by the V-groove in the track shoe. The grousers are designed to give a spring lock when bolted in place. GROUSERS BUILT FOR No. 1. Squart Corner Dirt Grouser, 12 inches wide. Standard equipment. Also available 14 and 16 inches wide.* No. 2. Ice Grouser (Used with or without plate.) No. 3. Pressed Steel Pavement Grouser, 12 inches wide. (Used with or without plate.) No. 4. Pressed Steel Street Plate, used with Dirt Grouser (Fits over Dirt Grouser.) Furnished for alternate shoes or all shoes. No. 5. Cast Steel Pavement Grouser, 11 inches wide. *Plates and grousers over 14 inches available for hillside models only. Wood blocks and special grousers not shown here can be furnished as special equipment. See price list for full details on plates and grousers. No. 6. Beveled Corner Dirt Grouser, 12 inches wide. Also available 14 and 16 inches wide.* No. 7. Rubber Block. No. 8. Standard Grouser Plate, 12 inches wide. Also available 14-16 and 18 inches wide.* No. 9. Cut-out Plate (Used with Ice or Dirt Grouser) 12 inches wide. Also available 14 inches wide.* No. 10. Combination Grouser and Plate, 20 inches wide.* Also available 18 inches wide.*

CRAWLER DESIGN Track rails are wide apart for maximum traction from SIDE to SIDE Track rails are wide apart so that the weight of the tractor is spread over a wider area from side to side. The Oliver "Cletrac" is solidly supported--not balanced on the track. The front idler wheels are also wide-spread so that the track is accurately guided and cannot weave or twist. A minimum part of the track projects beyond the rails, so that twisting strains produced by running over rocks or uneven ground are minimized. This is one reason why the Oliver "Cletrac" is able to step lightly over soft soils . . . to give a maximum of positive traction when the ground is hard and the load heavy . . . to combine positive traction with lightness in weight and so develop better than 80 per cent of its weight in drawbar pull. / . V GROUSER PENETRATES FOR PERFECT TRACTION This photograph shows how the Oliver "Cletrac" digs in to deliver extra horsepower at the drawbar! The correct number of lower track wheels and the proper length of track shoes hold the entire track in contact with the ground from front to rear. The result is that the Oliver "Cletrac" has the positive traction you need in getting in and out of tough spots . . . traction to pull maximum loads on hills ... traction to get the production that keeps difficult jobs up to schedule. There are no loafing grousers on the bottom of an Oliver "Cletrac." Every grouser bites into the soil and hangs on! The grousers are so designed and spaced that they penetrate without "working" the soil. There is no tendency to decrease the shearing resistance of the soil. Every grouser digs into the ground, to use every possible ounce of engine power without depending upon extra or "dead weight" for traction. 8

THAT'S BUILT FOR LOWER TRACK WHEEL SHAFT The lower wheel shaft is especially selected steel, carburized, hardened and ground. The upper, or the low pressure side, is milled flat. This provides for proper distribution of the oil along the entire length of the shaft and bearing. The bushings are of special alloy bronze, wear resistant and with carefully controlled bearing qualities. These bushings are individually replaceable so that when wear occurs they may be easily and inexpensively replaced. 9 Lower track wheels that really take the side thrust a RP 11=1111111 Keeping dirt out and lubrication in is the secret of long life in crawler tractor lower track wheels. The construction of the Oliver "Cletrac" lower track wheels really keeps dirt out, keeps oil in and greatly increases the life of the wheels. Each end of the wheel bearing is fitted with a double Dirt-Oil Seal, an exclusive feature on the Oliver "Cletrac." One part of this seal is a barrel-flanged leather packing with a contracting phos- phor-bronze coil spring which fits on the curve of the flange. The tension of this spring holds the taper edge of the leather packing in snug contact with the shaft. Then there is an additional leather seal. This Double Seal is built as a special unit with the outer cover crimped over, thus enclosing the entire assembly in a fixed unit for a close press-fit into the retainer. It is a permanent, more positive way of keeping dirt out and A Oil Fitting B Oil passage from fitting "A" to reservoirs "CI" and "C2" C- "Ci", "C2" Oil Reser- voirs D Oil passage from "CI" to "C2" E Oil passages to the bronze bushings and shaft F Bronze bushing G Dirt and oil seal H Bearing retainer I Lower track wheel I Lower track wheel hub K Oil seal retainer ring L Center end thrust control flange oil in, in, than the customary less expensive, single, flat or split cork seals. There is no end thrust against the oil-seal bearing retainer or against any portion of the bearing. Protecting these seals from end thrust when working on side hills and when turning is the Oliver "Cletrac" center end thrust control . . . a heavy flange in the center of the wheel shaft which operates against two flanged, remov- able bronze bushings and prevents end play. Cletrac lower track wheels are drop-forged steel, hardened and shrunk on the hub. Each track wheel is individually lubricated.

THERE'S Shocks and wracking caused by an Oliver "Cletrac" hitting obstructions or making a short turn is not transmitted to the final drive sprocket or to any of the gears or shafts. This is because there is no connection between the drive sprocket and the track frame. The track frame of the Oliver "Cletrac" oscillates on a heavy, fixed track frame shaft. Shocks caused by hitting an obstruction are cushioned by an enclosed, protected buffer spring which encircles the front wheel shaft and works against the stationary track frame shaft. It absorbs shocks, prevents damage. /05 -,VJOg) IR, -71 IN OLIVER "Cletrac" MAIN FRAME OLIVER Cletracs are designed and built to withstand these severe Strains of operation never reach the transmission case or engine of the Oliver "Cletrac." The engine is carried by a heavy, rolled one-piece steel frame which rests on two longitudinal springs properly tapered and free moving in spring brackets—one on each side of the frame. The engine is set down in this frame, which is supported and carried on springs at four points. This general design relieves the engine and transmission case of harmful, damaging strain caused by operating the tractor over uneven ground. JO- Any twists that may be set up by the up-and-down oscillating motion of the tractor when in operation are minimized in the Oliver "Cletrac" by the two heavy horizontal springs. The engine bell housing is bolted to the transmission case, and the front end of the engine is mounted in a trunnion. Should any twists or strains reach the frame, they are not passed on to the engine. This safeguards the alignment of main bearings, crankshaft, pistons and connecting rods. 10

Oliver Cletrac Model A

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