THE KETT TOOL COMPANY 5055 Madison Road, Cincinnati, Ohio 45227
(513) 271-0333 fax (513) 271-5318 www.kett-tool.com
INSTRUCTIONS FOR THE CARE OF
THE KETT 42-20 SHEAR HEAD
CAUTION
Disconnect Power Unit
Before Servicing Tool
PARTS LIST
40-21 Center Blade
40-23 Shear Housing
40-24 Eccentric Bearing Assembly
42-27 Spacer Bushing
92-28 Cap Screw (3)
92-31 Knurled Insert (3)
60-22L Side Knife, Left
60-22R Side Knife, Right
60-25 Thin Washer, Large
60-27 Spacer Bushing
60-29 (150-4) Allen Wrench
DISASSEMBLY:
To remove the shear head from the
motor loosen three cap screws (92-28). Remove shear
head from motor by pulling head fi rmly forward. Slight
tapping with a mallet may be required if head does not
slide off easily.
To remove cutter blades from shear head remove
three cap screws (92-28) from shear housing (42-23).
Be careful not to lose rear spacer bushing (60-27) when
removing the middle cap screw. Remove center blade
(40-21) from shear housing by tapping blade gently rear-
ward. Be careful not to lose spacer bushing (42-27) from
hole in center blade. Side knives (60-22L and 60-22R)
will now drop out of the shear housing.
To remove eccentric bearing assembly (40-24)
from shaft use an appropriate wrench to loosen eccentric
nut by turning counter clockwise.
ASSEMBLY:
To install eccentric bearing assembly (40-
24) onto shaft, make sure the large thin washer (60-25)
is fi rst inserted over the shaft. Screw eccentric bear-
ing assembly on to shaft and tighten with appropriate
wrench. Lubricate bearing with a good grade of bearing
grease.
To install cutter blades into shear housing (42-23)
place the side knives (60-22L and 60-22R) into position
in the shear housing (42-23). Insert center cap screw
(92-28) through the side knives (60-22L and 60-22R)
with rear spacer bushing (60-27) between them and
start cap screw into thread just enough to hold blades in
place. DO NOT TIGHTEN. Insert spacer bushing (42-
27) into hole in center blade (40-21) and lubricate with
Molybdenum Disulfi de grease (264-2) or equivalent.
Install center blade into shear housing by tapping blade
gently forward using a drift to line up hole in center blade
with forward holes in housing. Insert and tighten forward
cap screw (92-28) making sure spacer bushing (42-27)
in center blade stays in position. Apply Molybdenum
Disulfi de grease (264-2) or equivalent to clevis or yoke
in center blade where it rides on the eccentric bearing
assembly. Insert rear cap screw (92-28) into shear hous-
ing, but do not completely tighten.
To install shear head assembly onto drive motor
make sure all cap screws (92-28) are loosened about
three or four complete turns. Spread shear housing
(42-23) slightly using a spreader (drift) near the rear cap
screw (92-28). Place shear head onto unit, tap left side
knife rearward as far as it will go, and tighten cap screws
to 40-45 inch pounds. It may be necessary to gently tap
the shear head into place if it does not readily slip onto
the nose of the power unit.
WARNING: THE KETT TOOL CO. CANNOT ASSUME RESPONSIBLITY FOR DAMAGE TO OR
MALFUNCTION OF A KETT SHEAR HEAD USED IN COMBINATION WITH ANY DRILL OTHER
THAN THOSE REGULARLY SUPPLIED BY US.
