Blade And Hook Maintenance - Greenlee LHFS-210001 Operation, Service And Parts Instruction Manual

Service (cont'd)

Blade and Hook Maintenance

Do not change accessories, inspect, adjust or
clean tool when it is connected to a power source.
Accidental start-up can result in serious injury.
Dressing the Cutter Blade and Hook
A build-up of metal, referred to as a "wire edge," will
form on the edge of a new blade as it seats across the
face of the hook. This wire edge must be removed
several times, until the blade seats itself to the hook.
Rough and dull edges may form on the cutter blade and
the cutter hook from normal usage. Both components
must be dressed with a pocket whetstone several times
each operating day. This keeps the cutting edges sharp
and prevents them from rolling and chipping.
1. Stop the power source.
2. Use the provided pocket whetstone (L046108) to
remove the wire edge by rubbing the whetstone
back and forth on the blade and hook until the
surface irregularities are smooth and the blade
edge is sharp.
Sharpening the Cutter Blade
When a blade has acquired deep nicks and gouges or
has become too dull to be sharpened with a whetstone,
it will be necessary to remove the cutter blade and
sharpen it with a fine metal-cutting file.
1. Disconnect the tool from the power source.
2. Remove the cutter blade from the tool. See Dis-
assembly - Cutter Head.
3. Sharpen the blade with a fine metal-cutting file.
Note: When sharpening with a file, it is important to
maintain the original shape and contour of the
blade. An equal amount of material must be
removed from all parts of the blade. DO NOT
sharpen the blade to a thin, razor edge. This
reduces the strength and shortens the service
life of the blade. Do not over-use the file. It is not
advisable to remove large amounts of metal from
the blade.
4. After the contoured side of the blade has been
sharpened, turn it over so that the flat side is facing
up. Dress the blade with a whetstone just enough to
smooth away any nicks and irregular sharp edges
that may have formed during sharpening of the
contoured side of the blade.
5. Remove any nicks or rough edges on the hook with
a pocket whetstone. The inner curve of the hook
Greenlee Textron / Subsidiary of Textron Inc.
Orchard and Shade Tree Pruner
should have a beveled cutting edge. This can be
achieved with the whetstone also. Failure to do this
can ruin a new or sharpened blade.
Tension Adjustment (see Figure 4)
The tension adjustment should be checked after about
one hour of use on a new cutter. A wearing-in process
takes place during this time and the cutter pivot nut may
need tightening.
The cutter hook and cutter blade must fit together
snugly. If they are too tight, the cutter will not perform
properly. If the fit is too loose, the tool will not cut
cleanly, and damage to the tool may occur.
1. Disconnect the tool from the power source.
2. See Figure 4. Disconnect the cutter blade (1) from
the linkage that secures it to the extension rod end.
3. Remove the #10 x 1/4 inch socket head cap screw
(2), #10 lock washer (3) and the lock (4).
4. Tighten or loosen the 3/8 - 24 cutter pivot nut (5)
until some drag is felt when the blade (1) is opened
or closed.
5. Install the lock (4) over the 3/8 - 24 cutter pivot nut
(5). Secure the lock (4) with the #10 x /14 inch
socket head cap screw (2) and the #10 lock
washer (3).
Note: If the slot in the lock (4) does not align with the
threaded hole in the cutter hook (6), turn the lock
(4) over. This will allow the lock to be positioned
so that the slot will line up with the threaded hole
in the cutter hook, allowing the #10 x 1/4 inch
socket head cap screw (2) to secure it in place.
6. Reconnect the linkage to the cutter blade (1) and
extension rod end.
Figure 4
Tension Adjustment
11 4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
1
5
4
2,3
6