(ET) HC05 Weeder/Cultivator Help Requested

["Darryl McMahon" <darryl econogics com>]

I was in the garden today with the cultivator, and it just stopped.

(For those not familiar with this little gem, it plugs into the ET 
accessory plug 
(not the electric PTO plug), has about a 3 foot handle and two sets of 
tines about 
6 inches in diameter.  Marvellous for weeding between rows in the garden.)

This has happened on occasion before, when the unit has picked a small 
rock and 
jammed the tines.  This time, no rock.  Normally, there is about 5 degrees 
play in 
the rotation of the tines, this time locked solid.  I checked for blown 
fuses, 
visually everything is OK, and the rest of the tractor is operating 
normally.

I have started the disassembly process, including the 7 screws that hold a 
cover 
plated over what I presume is the gear-train area between the hubs that 
hold the 
tines.  However, the plate does not appear to want to come off.  I don't 
see any 
obvious way to remove the hubs, and I don't want to brute-force the plate 
with a 
chisel if I can avoid it.  Unfortunately, I don't have any literature on 
this 
equipment.  So, has anyone else had some experience with this unit?  Any 
ideas 
regarding the removal of the hubs or the gearbox cover plate?

Darryl McMahon