are manufactured from 5mm, hot dip galvanised steel plate, strongly
reinforced with full length gussets. Adjustable skids and a swining
headstock, supported by chain backstays, are fitted as standard.
Cat 1 & 2 bottom clevis pins at Cat 1 centres. HD models are centrally
mounted except for the HD150 model which is offset 18cm to the left.
- Drive Shaft:
BYPY 107 series tri-lobal drive shafts (uni-cross 35x94mm) are used
on the HD150, HD180 and as cross shafts on the HD300. The drive shaft
on the HD300 is a tri-lobal BYPY 108 series (uni-cross 35x107mm).
- Clutch: A Howard sintered bronze, two-plate
clutch is fitted to the slasher end of the drive shaft.
The Howard desgined and built, fabricated steel 100 HP HD gearbox is
fitted with machine cut hardened alloy steel gears and taper roller
bearings throughout. The combined spindle, output shaft and blade beam
mounting flange, is precision machined from a single drop forging. A
double oil seal system, backed up by a felt seal and a dust cover, is
used to protect the spindle bearings. The HD gearbox ratio is 1:1:81.
On the HD300, the Comer splitter box ratio is 1:1.
- Blade Beam: Multi-leaf, spring steel
balde beam with tear-drop, stress reduced blade fastener holes.
Drop forged, heat treated step-down blades swinging on extra hard, cold
forged bushes. The HD300 model uses stepped bi-directional blades.
- Options: Single, laminated rubber, puncture
proof height control wheel (Twin wheels are standard on the HD300).
Front and rear safety guards (Note: Rear guards cannot be fitted to
the HD180 if a single wheel is also fitted).