OutdoorKing Repair Forum Forums Restoring, Customising and Modifying Reel-Type Mowers Scott Bonnar Supercut 20"

The drum which is driven by the brake clutch shoes. In the parts list, Item number 158 is the drum, 147 is the shoes and 159 is the drive sprocket, which drives the chain, which drives the reel.

I see,
So the issue is removing the sprocket from the countershaft (not the reel).
The issue is, how is the sprocket (61) attached to the clutch drum (158)?

I will have to defer to a Mod or a member on that.

G'day folks,

I'd say #61 is the outer-mounted drive gear for the landroll clutch, and #159 is the reel drive sprocket here.

It makes sense for that drive gear to be keyed to the shaft, with one of the #62 woodruff keys.

As far as I can work this out, the reel clutch drum/sprocket assembly is free-running on the countershaft, located axially by the drive gear #61, and clutch backing plate #206 [which is also keyed to the countershaft], with thrust washers #160 and #161.

Pic #2 in post #70008 back on Page 1 has a reasonable detail view of the sprocket, if it's enlarged a bit. This confirms the large diameter centre hole in the sprocket, an indication that it is most likely screwed on. SB doesn't seem to have favoured splines.

As it happens, we do know the reel drive sprocket is screwed onto the hub extension of the clutch drum, from a past poster who found out the expensive way ; https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=61229

I'd expect this to have a RH thread, i.e. the opposite to the driven sprocket on the reel.

Hopefully one of the past posters with hands-on experience of the Supercut teardown will chime in!

Thanks Gadge, I think you may be right. I have had a close look and there appears to be a thread. I have tried to turn it but it is tight. May have to get some heat into it.

Hi drew2229au and Mod Gadge

Yes, Gadge (AKA Mr Spacely from the Jetsons) has the engineering background and the
skills to see this. I feel the advice on the RH thread is important here: because this
is a driving sprocket (rather than driven).

Please let us know what transpires.
A good photo and text will help members understand the issues.

Thanks again to Mod Gadge.
----------------------
Jack

Finally got this to load.

Hello drew229au

ODK appreciates the efforts in presenting these pictures.
I feel technical information on Supercuts is lacking, and these
good photos help owners understand the machine.

A second person clasping the drum, as a quick mallet shock is
applied anti-clockwise to the sprocket may be all that is needed
to unlock the thread.

----------------------
Jack