Hayter Lawnmower Disc Blade Carrier - how to remove?
Davy wrote:
I now know how to do this.
Cutter disk is held by a 3/8 UNF bolt (9/16AF or 14mm socket - either fit
just as well) and a woodruff key to prevent rotation. Bolt can be very rusty
and tends to be worn smooth by contact with hard objects; would be better to
replace but is unusual so would need to order.
Recommended to jam cutter disc with a mole grip which will jam against a
piece of wood against the mower skirt. Retaining bolts needs a lot of torque
to get off; is said to be high tensile so head will not shear off. Recommend
a six-sided (not usual 12) socket. If this fails then weld a long bar to the
nut.
The centre of disc is threaded so a 7/16 UNF bolt can be screwed in against
the crankshaft end and will force disc off. Need to put a spacer in to
prevent threads in crankshaft being damaged. If disk has not been off for a
long time then woodruff key is likely to be rusted into the keyway and disk
will be difficult to remove. Disk is thin so has only a few threads and
these are likely to strip. Some resort to WD40, blow gun and big mallets.
Some cut the disk off. If done by a dealer then expect an hour at £30.
Examine disk for cracks - if it disintegrated at speed then not funny. If
blade bolt holes are elongated then needs a new disk.
Whilst disc is off, allows access to oil drain plug so oil can be changed.
hope this helps,
certainly does mate.
Thanks.
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