5
Form C-1600
Shear Plate Replacement
Remove knife blade (see knife replacement). From underside of
base plate assembly, remove (2) two screws “K” holding in spring
block “L”. Lift out spring block and shear plate assembly. Separate
shear plate “M” from spring block by removing (2) two screws “N”.
Replace with new shear plate and reassemble in reverse order.
Knife Sharpening and Sharpener Replacement
To obtain a fine, keen edge on the blade, press lightly against the
sharpener button “P” with a constant pressure while is running.
To replace sharpener stone, first remove knife blade (see knife re-
placement). Insert screwdriver into slotted head of sharpener button
and hold hex bushing “Q” in place. Turn counterclockwise and re-
move sharpener button and spring “S”. Set these parts aside for
later reassembly. Remove screw “T” to separate hex bushing, spring
washer “U” and emery wheel “V”. Replace emery wheel and reas-
semble in reverse order.
Lubrication
Knife gear “Z” should be removed and packed with Eastman Lubriplate
grease every three months. First remove knife blade (see knife
replacement) to expose support plate assembly 826C1-8. Remove
three (3) screws “W”. Next, turn a 10-32 X 11/2 “ long screw into the
center of the knife flange “X”. This screw will act as an extractor so
that the gear, bearing, knife flange and base plate assembly can be
removed as a unit. Continue turning screw until approximately 1/8”
of thread is left exposed and lift out the assembly. Repack gear teeth
only with grease. Remove extractor screw and reassemble in re-
verse order. BE careful to start seat bearing “Y” squarely during
reassembly.
Motor Brush Replacement
Remove (4) four screws “A” from cover plate. Lift off cover plate and
cover insulation. Remove (2) screws “B” and carefully remove cir-
cuit board “C”. Using care not to pull wires out, turn board over and
loosen two screws “D” to remove motor brushes & pigtails.
Replace with new motor brushes, bevel corner at wire pigtail slides
into brush holder “E” facing down, with wire coming out of slot “F” to
fastener “D”. Wrap pigtails around screw fasteners and tighten “D”.
Turn assembly over and, with your fingers, separate the brushes
enough to fit over commutator bars “H” and at the same time working
circuit board inside cavity insulation “J”. Continue working assem-
bly down until brushes snap into position and flat to inside standard.
Replace two screws “B” holding circuit board in position. Replace
cover and cover insulation securing with four screws “A”
Switch Replacement
Remove (2) two screws 301C12-5 from right side handle 22C2-3 and
separate right side handle from standard. Remove switch 580C1-
109 and switch insulation 8C4-81. Replace with new switch and
reassemble in reverse order. Make sure insulation is in place and
undamaged before reassembling handle.
Level becomes unacceptable, the following procedures
should be carried out before repairs are considered.
Summary of Contents for Robin
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