Models
The following info appeared on Nels' page.
Which Model do I have?
There is a tag that can be found on the left side of the transmission (gearcase). On hooded tractors it will be just below the gas tank bracket.
The top number is the model number of your tractor. This number can be used to reference information about your tractor on this (and other) DB sites. The first six digits (ie 917.575) are the same on all David Bradley tractors. 917 is the Sears source code for David Bradley corporation (at least it was at that time), and 575 seems to indicate "walk-behind tractor" or something similar. The digits that follow these six are unique to each particular model.
The lower stamped number is the series number. It is NOT a serial number. Series numbers were assigned to batches of tractors. Hundreds (or thousands) of machines may have the same series number. Because of this, the series numbers are of little use for dating purposes, although they can to some extent place a tractor in the early, middle, or late part of the run for a particular model of tractor.
Model 917.5751
"Garden Tractor"
Manufactured from 1946 to 1949.
Hooded tractor with red chassis and green wheels
Briggs and Stratton 500.306126 (early) or 500.306197 (late) @ 1.6 hp
(Briggs model N or model 6)
One piece frame
Spring type clutch
This first version of the David Bradley walk-behind tractor underwent many minor design changes during its production run. The most notable difference that distinguishes this model from later hooded tractors is the lack of the saddle bar and the forward hitch. Instead, a T-shaped offset hitch adaptor mounted in the rear set of slots under the engine, and was pinned to the front eye on the gear case. Most rear mounted implements required this hitch adapter. The adapter needed to be removed for mounting front mounted implements. The rear of the cultivator (and an early version of the seeder) hung from two link rods, which were clamped to the upper part of the handlebars. For other rear mounted implements a saddle bar needed to be added. The front hitch and the saddle bar could be purchased separately as a "hitch improvement kit." Early versions of the '51 had smaller (1/2") holes in the spreader strap on the handlebars, which needed to be drilled out to mount the (5/8") saddle bar. The earlier versions also used a different engine mount with straight implement mounting slots in front. Later versions had the front slot angled down in front. The implement would have to be inserted from below and rotated up and back into the slot. There was also a short brace made of round rod with flattened ends for bolt holes, which was bolted diagonally between the rear of the engine mount and the lower part of the gear case.
The engine pulley had two v-belt grooves with a flat area between for use with small flat belts for stationary work. They were steel for the most part, with some aluminum pulleys showing up on later versions. The clutch pulley was cast steel/iron with two donut shaped clutch facings, one on either side of the pulley.
The most common style of wheels are commonly referred to as the solid disk style. These had a nearly flat continuous center portion with no slots or openings. They had a 5-hole pattern at the hub, although only three were used. The wheels were mounted to the hubs by way of three holes with a bolt and nut in each position instead of studs anchored in the hub. There were also six holes spaced equally around the outer portion of the rim center, which were spaced correctly for wheel weights (although only two holes are required to mount the weights). There was one other type of rim which appeared on a few of the 5751's. This alternate style rim had a slightly dished center with only four wheel weight holes in stamped bosses.
Tires were 6.00x16 and were ordered separately at extra cost. The most common tire offered by Sears at the time was the Allstate "Button bar" (knobby) tread. However, many types of tires are seen on these machines, as farmers used the old truck tires or bought recaps to save some cash.
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5752Model 917.5752
"Garden Tractor"
Manufactured from 1950 to 1953
Hooded tractor with red chassis and green wheels
Briggs and Stratton 500.306197 @ 1.6 hp
(Briggs model 6)
One piece frame
Spring type clutch
This second model of the David Bradley tractor was very much like the later versions of the first. This model introduced an improved front hitch, which was bolted to a welded bracket under the engine mount. The saddle bar also became standard equipment. This hitching arrangement continued for all subsequent models. The round rod diagonal brace under the engine mount disappeared at this time because the new hitch helped provide this support.
The clutch was changed slightly to add six alignment lugs to the drive pulley to match notches in the clutch facings. The clutch pulley changed to aluminum also. Engine pulleys were steel for the most part, but some aluminum ones have been seen. Other features remained the same as the 5751.
The 5752 wheels were more of an automotive style, with the centers attached at four points inside the rim, leaving vent slots between. The bolt circle for the hub standardized to just three holes. The hubs now incorporated automotive type lug studs pressed into the hub flange and tapered lug nuts. Tires remained 6.00x16. The button bar tire was common early, but Allstate Farm Master ag tread tires were introduced during this time period. The ag tread continued until the end of production.
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5756Model 917.5756
"Garden Tractor"
Manufactured 1950
Hooded tractor with red chassis and green wheels
Continental 127.100 @ 1.6 hp or 127.102 @ 1.8 hp (AU7)
One piece frame
Spring type clutch
The 5756 was exactly the same as the 5752 except for the engine. There was apparently an availability issue with the Briggs & Stratton engines around this time, so a second supplier was secured. The Continental engine chosen was of a similar size and horsepower as the Briggs & Stratton on the 5752. Continental engines had a different look than the typical Briggs in that the cylinder was slanted diagonally forward to give it a lower profile. This left the carburetor on top of the engine block. Early versions used the 127.100 and later 5756's used the 127.102 engine. They differed primarily in carburetor and governor types. Since the engine supplier also supplied the gas tank and throttle cable, these items are different as well on the 5756. The Continental gas tank was the same size as the Briggs tank, but it had a set of concentric rings embossed on the ends. This tractor also had a 4" round decal on the side of the gas tank which had the Continental logo on it, along with some use and care instructions. The throttle control lever was a more slender design with a plastic knob on the end of it (usually white).
For other details of this tractor see the description for the 5752.
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57560Model 917.57560
"Super Power"
Manufactured from 1951 to 1953
Hooded tractor with red chassis and green wheels ("Super Power" decal on hood)
Briggs and Stratton 500.702052 @ 2-1/4 hp (early) or 500.108022 @ 2-1/2 hp (late)
(Briggs model 8)
One piece frame
Ball lock clutch
The 57560 was the first of the "Super Power" tractors. The engine was upgraded to a Briggs & Stratton model 8, which represented a 30% increase in horsepower. The engine on the early models was the 500.702052, which looked nearly identical to the earlier Briggs engines. It had the same flywheel shroud with the rounded top. The big difference was the piston size was increased from 2" to 2.25". The later engine was mechanically identical, but it had the more modernized appearance with the squared off shroud top common to all the newer Briggs engines of the period.
To handle the extra power and increase reliability, a new clutch was introduced. Previous clutches were engaged by spring pressure only. The ball lock clutch used no springs. There was a set of ball bearings captured between a tapered cone and sleeve on the clutch shaft. Lateral pressure on the cone wedged the balls into the sleeve, which applied pressure to the clutch pressure plate. When adjusted properly, the cone/sleeve/balls would lock up into a solid unit when engaged, resulting a more positive clutch pressure that would lock in the engaged position without the use of springs. These clutches tended not to be as smooth to engage as a spring clutch, but they were much less prone to slipping when adjusted properly. Adjustment was achieved by rotating the outer pressure plate on the threaded hub, which was pinned to the shaft of the gearcase. This moved the pressure plate nearer to (or farther from) the other half of the clutch. The threads on the hub were interrupted by flats where a set screw would secure the adjustment.
Early versions of the 57560 used the same 16" wheels as the 5752 and 5756, but 15" wheels became available later in the production run. Either type rim may be found on this model. Just as a side note, nearly all of the 15" rims had the David Bradley standard 3-hole lug pattern at the center, but occasionally a set of 5-hole 15" rims shows up. Either is correct, and which one was mounted to a particular tractor may have been an availability issue. I believe the 5-hole rims were made primarily for use on larger David Bradley farm equipment (wagons, side rakes, etc.). The tire size for the 15" rims was 6.70x15, and the common rubber was the Allstate Ag tread tire.
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Model 917.57561
"Super Power"
Manufactured from 1951 to 1953
Hooded tractor with red chassis and green wheels ("Super Power" decal on hood)
Continental 127.101 @ 2.3 hp (AU7B) early, or 127.300 (AU8) @ 2.25 hp (later upgraded to 2.5 hp) late
One piece frame
Ball lock clutch
The 57561 was the same tractor as the 57560, with a different engine. The 127.101 engine was used on a few of the very early versions of the 57561. Models with this early engine also retained the 4" round decal on the gas tank. However, most 57561's had the 127.300 AU8 engine. The gas tank decal was discontinued with the 127.300 engine. The AU8 tractors also came with a new throttle control, which was of heavier stamped steel construction. This control lever was used on all Continental powered tractors hereafter.
Other details of this machine are the same as the 57560.
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Model 917.57562
"Special"
Manufactured from 1951 to 1953
No hood -- red chassis and green wheels
Briggs and Stratton 500.106024 @ 1-3/4 hp
(Briggs model 6)
One piece frame
Spring type clutch
The 57562 was referred to as a "Special" by David Bradley. This was an economy version of the DB tractor. By omitting the hood and gas tank mount, the tractor could be sold a bit cheaper. The gas tank was mounted directly to the engine. With the exception of these few items, the tractor was essentially the same as the Briggs powered hooded tractor.
The spring clutch was used instead of the new ball lock clutch. This was either a cost saving measure, or they were using up some clutches they had left over from earlier models. There is also one minor difference in the handlebars, in that there is a small slot near the lower bend of the right side tube to allow the throttle cable to exit at this location. This handlebar modification was also used on some of the Continental powered tractors.
There has been some discussion among collectors that the early versions of the 57562 may have had a round top Briggs engine. An early 50's Sears Farm catalog shows a picture of a "Special" with a round top Briggs. However, I have only seen the square top Briggs engines on these models. It could well be true. I just haven't seen it.
The 57562 used the same 16" wheels as the 5752 and 5756, with 6.00x16 tires. The tires, if bought from Sears, would have been an ag tread Allstate Farm Master.
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Model 917.57571
"Super 3"
Manufactured in 1954
Hooded tractor with red chassis and green wheels ("Super 3" decal on hood)
Continental 127.400 (AU85) @ 3 hp
One piece frame
Ball lock clutch
The 57571 was the first of the "Super 3" tractors. The Super 3 catered to the upscale buyer who wanted more features and horsepower. Additional features included reverse, speed changer, and a new three horsepower Continental engine with handlebar mounted kill switch. A recoil start was also available, but I am not sure whether it was standard or an option. Recoil is not mentioned in the 1954 ad. I have seen three of these models with the recoil, and one without. Glean what you will from that. Reverse and speed changer were available optionally for other DB tractors at extra cost, but this model included them as standard equipment. Although later versions of the Super 3 were painted in a bronze/cream color scheme, this first version retained the traditional red/green scheme.
The 57571 came with 15" wheels and 6.70x15 Allstate Ag tread tire. The Super 3 rims differed very slightly from the standard 15" rims at the center. Where the other 15" rims had a smooth raised arc segment between the lug positions, the Super 3 rim had flat arc segments with a raised dome in the positions where the 4th and 5th lugs would have appeared on a 5-bolt pattern.
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Model 917.57583
"5 hp Special"
Manufactured in 1955
No hood -- red chassis and green wheels
Briggs and Stratton 500.202087 @ 5 hp
(Briggs model 14)
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 57583 was the first "5 hp Special." The 5 hp Specials are commonly referred to among collectors as "Big 5's." David Bradley introduced this tractor to add more horsepower to the David Bradley line. The stand out feature of this machine is the addition of the much larger 5 horsepower Briggs & Stratton model 14 engine. With this additional horsepower the DB tractor became a true workhorse.
This model incorporated several notable changes. The frame was modified to a two piece design. Earlier models had the handlebar tubes clamped to the sides of the gearcase and continuing on to the front to support the engine mount. This is referred to as a one piece frame. The 57583 needed more strength in the frame to support the heavy engine. Now the handlebars ended in a triangular steel plate which bolted to the rear of the gearcase. An interesting addition to the handlebar mounting point allowed them to be adjusted for height in three different positions. Solid steel bars now supported the engine mount. These bolted to the front of the gearcase in a similar fashion as the handlebars, but without the adjustment. The '83 had one extra through bolt in the engine mounting bracket, just ahead of the gearcase, that is not present on later 5 hp Specials. The engine mounting plate was modified to include two flat steel bars welded transversally with mounting holes for the big engine. A beefier kick stand was also added. The engine was too large to accommodate the standard hood, so the hood was omitted on the big tractors.
The ball lock clutch became standard on all tractors, and now included the "reverse ready" pulley. This outer pulley also served as the outer pressure plate for the clutch. Earlier tractors required the removal of the outer pressure plate and replacement with this pulley for the addition of the optional reverse kit. David Bradley now included the pulley on all tractors, but reverse was still an extra cost option for most machines, to be added after purchase. The inclusion of the pulley made the reverse installation simpler and less trouble prone, because clutch disassembly and adjustment was no longer part of the procedure.
The 57583 came with 15" wheels, and the tires (if ordered from Sears) were ag tread Allstate Farm Masters.
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Model 917.57584
"Deluxe Super 3"
Manufactured in 1955
Hooded tractor with bronze chassis and cream wheels ("Super 3" decal on hood)
Continental 127.400 (AU85) @ 3 hp
Two Piece Frame
Ball lock clutch
The 57584 was the next step in the "Super 3" line of tractors. The new bronze/cream color scheme introduced with this model made it really stand out. The 57584 also brought the two piece frame to the Super 3 line. Other than that, the features were the same as the first Super 3 (57571). Manuals for the 57584 were in print in 1955, but catalogs for 1955 only show the earlier 57571 (red/green) Super 3. This makes me wonder if they may have actually been sold in 1956. The Super 3 catered to the upscale buyer who wanted more features and horsepower. Additional standard features included reverse, speed changer, and a new three horsepower Continental engine.
The 57584 came with 15" rims and 6.70x15 Allstate Ag tread tire. The Super 3 rims differed very slightly from the standard 15" rims at the center. Where the other 15" wheels had a smooth raised arc segment between the lug positions, the Super 3 rim had flat arc segments with a raised dome in the positions where the 4th and 5th lugs would have appeared on a 5-bolt pattern.
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Model 917.57597
"Deluxe Super 3"
Manufactured in 1955
Hooded tractor with bronze chassis and cream wheels ("Super 3" decal on hood)
Continental 127.450 (AU85) @ 3 hp
Two Piece Frame
Ball lock clutch
The 57597 replaced the 57584 during the same production year. This third version of the Super 3 had a slightly different engine and improved clutch, otherwise it is the same as the 57584. The clutch was still a ball lock, but one facing was now riveted to the inner pressure plate. The engine changed only in carburetion. This model retained the two piece frame and bronze/cream color scheme of the earlier model, along with the speed changer, reverse, and kill switch. A recoil was also offered.
The 57597 came with 15" rims and 6.70x15 Allstate Ag tread tire. The Super 3 rims differed very slightly from the standard 15" rims at the center. Where the other 15" wheels had a smooth raised arc segment between the lug positions, the Super 3 rim had flat arc segments with a raised dome in the positions where the 4th and 5th lugs would have appeared on a 5-bolt pattern.
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Model 917.57598
"2-3/4 hp Special"
Manufactured 1955 - 1956
No hood -- red chassis and green wheels
Briggs and Stratton 500.107035 @ 2-3/4 hp
One piece frame
Ball lock clutch with 'reverse ready' pulley
The 57598 was a bit of an anomaly. This was another "Special" tractor, much like the earlier 57562, but with an aluminum block Briggs engine. While all other David Bradley models by this time had the new two piece frame, the 57598 reverted to the one piece design. Whether this was for the cost factor, or the company had some left over parts, I cannot say. It was a plain tractor without a hood.
The 57598 had a ball lock clutch with the 'reverse ready' pulley and 15" wheels. The tires, if bought from Sears, would have been an ag tread Allstate Farm Master 6.70x15.
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57599
Model 917.57599
"Super Power"
Manufactured in 1956
Hooded tractor with red chassis and green wheels ("Super Power" decal on hood)
Briggs and Stratton 500.905052 @ 2-3/4 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 57599 was the first hooded tractor to use an aluminum block Briggs & Stratton engine. The engine was equipped with a three groove pulley. Although this tractor came with the "reverse ready" pulley on the clutch, this tractor was not equipped with reverse. It was a plain tractor with clicker hubs.
The 57599 came on 15" wheels. The tire size was 6.70x15, and the common rubber was the Allstate ag tread tire.
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Model 917.575100
"5 hp Special"
Manufactured in 1956
No hood -- red chassis and green wheels
Briggs and Stratton 500.202087 @ 5 hp
(Briggs model 14)
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 575100 was the next of the 5 hp Specials, equipped with the 5 horsepower Briggs & Stratton model 14 engine.
The 575100 was essentially the same as the earlier 57583, but there was at least one difference in the way the engine frame bars connect to the gearcase. The '100 did away with the one extra through bolt that mounted these bars on the '83. They now simply bolted up to the gearcase by way of threaded holes in the casting.
The 57583 came with 15" wheels, and the tires (if ordered from Sears) were ag tread Allstate Farm Masters.
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Model 917.575102
"Super Power"
Manufactured in 1956
Hooded tractor with red chassis and green wheels
Briggs and Stratton 500.905052 @ 2-3/4 hp
One piece frame
Ball lock clutch with 'reverse ready' pulley
The 575102 was essentially the same as the 57599, other than the frame. While the ’99 had the new two-piece frame, the ‘102 used the one piece frame. Other features are the same as the 57599. It is a plain tractor with clicker hubs.
The 575102 came on 15" wheels. The tire size was 6.70x15, and the common rubber was the Allstate ag tread tire.
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575104 Super 3
Model 917.575104
"Super 3"
Manufactured in 1956
Hooded tractor with bronze chassis and cream wheels ("Super 3" decal on hood)
Continental 127.450 (AU85) @ 3 hp
Two Piece Frame
Ball lock clutch
The 575104 was another bronze hooded Super 3. There was a slight change in the speed changer linkage to a two piece link with a bell crank on the gearcase. Other than that, it was essentially the same as the 57597.
The 57597 came with 15" wheels and 6.70x15 Allstate Ag tread tire.
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Model 917.575105
"Super Power Special"
Manufactured in 1956
Hooded tractor with red chassis and green wheels
Continental 127.450 (AU85) @ 3 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
I have never seen a 575105, but an ad in a 1956 catalog advertises a 3 hp Super Power with a Continental engine. This must be it, because the specifics of the tractor in the ad do not match any other model. It is advertised as "Improved! Now has more powerful 3 hp Continental engine."
The 575105 came on 15" wheels. The tire size was 6.70x15, and the common rubber was the Allstate ag tread tire.
If anyone out there has more info on this tractor, drop me a note.
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Model 917.575111
"Special"
Manufactured in 1956
No hood -- red chassis and green wheels
Briggs and Stratton 500.905051 @ 2-3/4 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
Another hoodless "Special" tractor (like the 57598) with a two piece frame.
The 575111 came on 15" wheels. The tire size was 6.70x15, and the common rubber was the Allstate ag tread tire.
If anyone out there has one of these tractors, or a manual for it, drop me a note.
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Model 917.575112
"Super 5.6"
Manufactured in 1957
No hood -- red chassis and green wheels
Wisconsin ACN engine @ 5.6 hp
Two Piece Frame
Ball lock clutch
The 575112 was called the Super 5.6, and it represented the dawn of a new era. This tractor introduced the new locking differential gearcase. The differential made maneuvering the tractor much easier, and eliminated the tendency for the tractor to freewheel forward down hills as the clicker hub tractors did. It also simplified the reversing arrangement by eliminating the spring loaded drag brakes on the hubs which switched the ratcheting direction.
The Super 5.6 was the most powerful and best-equipped tractor to date. The Wisconsin ACN engine was rated at 5.6 horsepower, and was a very reliable and durable engine. The Super 5.6 was also well equipped, with reverse and a new larger speed changer unit. The linkage for the speed changer was in two sections with a bell crank on the gearcase. There was a kill switch on the handlebars, along with an extra lever, which locked the differential in the gearcase. The belt size was upgraded to 5/8” to handle the extra power.
The 575112 came on 15" wheels and 6.70x15 ag tread Allstate tires.
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Model 917.575119
"Super Power"
Manufactured in 1958 (?)
Hooded tractor
Briggs and Stratton 500.905052 @ 2-3/4 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
I know of one example of this tractor which has a gold hood with blue wheels, like the 575134. Other examples I have information on have the traditional red/green color scheme. The parts list I have is dated February of 1958. The other info I have gathered so far suggests that the 575119 was nearly identical to the 57599. Same engine, same frame, same clutch, hood, etc. The only difference I know of between the two is the number on the tag.
This tractor was equipped with 15" wheels, and the tires (if bought from Sears) were 6.70 X 15 Allstate Farm Master ag tread.
If anyone has one of these tractors or other information on the 575119, drop me a note.
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Model 917.575120
"5 hp Special"
Manufactured in 1957
No hood -- red chassis and green wheels
Briggs and Stratton 500.202087 @ 5 hp
(Briggs model 14)
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 575120 was identical to the 575100. Just a different tag number, and a year newer.
This tractor was equipped with 15" wheels, and the tires (if bought from Sears) were 6.70 X 15 Allstate Farm Master ag tread.
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Model 917.575121
"600"
Manufactured in 1958
Red chassis and green wheels
Wisconsin ACN engine @ 6 hp
Two Piece Frame
Ball lock clutch
The 575121 was also called a Super 5.6, and it was identical to the earlier 575112. I have one report that the clutch levers were changed to the newer style with the screw on retainer and the plastic ball knob, as found on the later 575135.
The 575121 came on 15" wheels and 6.70x15 ag tread Allstate tires.
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Model 917.575131
"Suburban"
Manufactured in 1958
Gold-bronze with blue wheels
Continental 127.450 AU85 @ 3 hp
Two Piece Frame
Ball lock clutch
The Suburban was an attempt to combine the desirable features of the bronze hooded Super 3 tractors with the differential transmission. This machine featured the 3 hp Continental engine, differential transmission, speed changer, reverse, kill switch, recoil, and a spring opening hood. It was the best equipped hooded tractor that DB made.
The 575131 was equipped with 15" Super 3 style wheels and 6.70x15 ag tread Allstate tires.
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Super 300Model 917.575134
"Super 300"
Manufactured in 1959 - 1960
Gold hood & chassis with blue wheels
Briggs & Stratton model 500.81302 @ 3 hp
Two Piece Frame
Ball lock clutch
Other than the catchy gold/blue color scheme, the Super 300 was a pretty plain tractor without reverse or other other features. It had the standard straight axle transmission and clicker hubs. The engine was upgraded to a 3 hp aluminum Briggs (thus, the "Super 300"), with recoil.
The 575134 was equipped with 15" wheels (blue in color) and 6.70x15 ag tread Allstate tires.
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Super 575Model 917.575135
"Super 575"
Manufactured in 1959 - 1960
Gold chassis with blue wheels (no hood)
Briggs and Stratton model 143302 @ 6 hp
Two Piece Frame
Ball lock clutch
The 575135 was mechanically the same as the 575112, except for the new 6 hp aluminum Briggs and stratton engine. This tractor had a locking differential, speed changer, reverse, and a recoil as standard equipment.
The 575135 was equipped with 15" wheels (blue in color) and 6.70x15 ag tread Allstate tires.
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575138Model 917.575138
"David Bradley 6"
Manufactured in 1962 (?)
Blue chassis with white wheels and blue handlebars (no hood)
Briggs and Stratton model 143302 @ 6 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 575138 was mechanically identical to the earlier "5 hp Special" tractors, with the exception of the Aluminum Briggs engine and the new blue/white color scheme. It was a plain tractor with no reverse and clicker hubs.
The 575138 was equipped with 15" wheels (white in color) and 6.70x15 ag tread Allstate tires.
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575139Model 917.575139
"Super 600"
Manufactured in 1962 (?)
Blue chassis with white wheels and white handlebars (no hood)
Briggs and Stratton model 143302 @ 6 hp
Two Piece Frame
Ball lock clutch
The 575139 was equipped with a locking differential, speed changer, reverse, recoil, and the 6 hp Briggs engine. This tractor is identical to the 575135 except for the color.
The 575139 was equipped with 15" wheels (white in color) and 6.70x15 ag tread Allstate tires.
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Model 917.575142
"Super 600"
Manufactured in 1963 (?)
Blue chassis with white wheels (no hood)
Briggs and Stratton model 143302 @ 6 hp
Two Piece Frame
Ball lock clutch
The 575142 was equipped with a differential, speed changer, reverse, recoil, and the 6 hp Briggs engine. This tractor is identical to the 575139 except for the tag number.
The 575142 was equipped with 15" wheels (white in color) and 6.70x15 ag tread Allstate tires.
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575138Model 917.575143
"David Bradley 6"
Manufactured in 1963 (?)
Blue chassis with white wheels and blue handlebars (no hood)
Briggs and Stratton model 143302 @ 6 hp
Two Piece Frame
Ball lock clutch with 'reverse ready' pulley
The 575143 was a plain clicker hub tractor with a 6 hp engine, identical to the 575138.
The 575143 was equipped with 15" wheels (white in color) and 6.70x15 ag tread Allstate tires.
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575144
Model 917.575144
"Sears 6 hp" or "Sears Super 600"
Manufactured 1964 - 1967
Blue chassis with white wheels (no hood)
Craftsman (Lauson/Tecumseh) 6 hp aluminum engine
Two Piece Frame
Ball lock clutch
The end of the line for the walking tractors. This was the last model built, and was sold in this configuration until the end of production. The 575144 was a well equipped tractor with standard reverse, speed changer, 6 hp engine, and a differential transmission (non-locking).
The 575144 was equipped with 15" wheels (white in color) and 6.70x15 ag tread Allstate tires.