PART TWO – SpecificationThe
Rover Thoroughbred was of a solid, quality design.
It had a steel plate chassis with the deck plate bolted to
the side frames – just like the original SB Model 45.
Originally in
Rover Hammertone Blue, it was a handsome machine: -
The reel was an un-inspired 5 blade (delivering 75 cuts per yard)
design, designed for mass production, using semi-skilled workers.
Reel bearing housings pay homage to post war Ransomes ones
(but Rover used alloy), and Rover separated these housings from
linking to the bottom block – a simple, older design – that meant the
bottom block and reel could not be removed as one assembly.
The rear rollers were cast iron with full differential action.
The chaincase transmission and landroll clutch were pretty close
copies of the brilliant SB 45 design, but the primary clutch referenced
Ransomes heritage in having a centrifugal clutch.
Unfortunately, Rover went for a small diameter one that acted
effectively as an ‘on-off’ switch, with high RPM required for
engagement. In my view, the weakest design element of the
Rover
Thoroughbreds.
The Thoroughbred was the first Australian reel mower to offer
a polyurethane catcher, and it was of a stylish large-capacity design.
There were three variants of the first Thoroughbreds introduced in 1975:
Model 8408 - 14” powered by a Briggs & Stratton 2.5hp 80102;
Model 8503 – 16” powered by a Briggs & Stratton 3.0hp 80202;
Model 8516 – 16” powered by a Kirby H4
There are two interesting but minor features that should be mentioned:
The ‘Easy Swing’ handle bar and the single-point front roller
height adjuster with height indicator. They were the subject of
two Rover patents [see next section].
TO BE CONTINUED …