6
OPERATING INSTRUCTIONS
READ SAFETY RECOMMENDATIONS
BEFORE CONNECTING TOOL.
OPERATION
The 116 and 136 RAB Series Right Angle Grinders are designed
to operate on 90 psig (6.2 bar) maximum air pressure, using a 1/
4" hose up to 8' in length for the 116 and a 5/16" hose for the 136.
If additional length is required, the next larger hose size may be
connected to the 8' whip hose.
LUBRICATION
An automatic in-line filter-lubricator is recommended as it in-
creases tool life and keeps the tool in sustained operation. The in-
line lubricator should be regularly checked and filled with a good
grade of 10W machine oil. Proper adjustment of the in-line
lubricator is performed by placing a sheet of paper next to the
exhaust ports and holding the throttle open approximately 30
seconds. The lubricator is properly set when a light stain of oil
collects on the paper. Excessive amounts of oil should be avoided.
Application of the tool should govern how frequently it is greased.
It is recommended that the right angle gears receive a generous
amount of NLGI 2-EP grease through the grease fittings after 40
hours of operation.
STORAGE
In the event that it becomes necessary to store the tool for an
extended period of time (overnight, weekend, etc.), it should
receive a generous amount of lubrication at that time and again
when returned to service. The tool should be stored in a clean and
dry environment.
DISASSEMBLY
To disassemble the tool, unscrew the right angle head (left hand
threads). This will allow the removal of the motor unit from the
backhead.
To remove the splined nut, 202236, use a 14mm six (6) point box
wrench and a 3/16" hex wrench. Insert the hex wrench into the
rotor shaft and unscrew the nut. Use a suitable driver to drive the
front rotor shaft out of the front rotor bearing. After removing the
cylinder and rotor blades, the rear rotor shaft may be driven out of
the rear rotor bearing.
To disassemble the right angle head, unscrew the spindle bearing
cap. This will permit the removal of the spindle assembly.
Use a 14mm six (6) point deep socket to remove the spline
adapter, No.202625. If the pinion is not engaging the driven gear
because of wear, remove the bearing, 202197, from the spindle
and put the driven gear back on the spindle. Insert the spindle and
driven gear back into the housing. With a brass hammer drive the
spindle needle bearing, No. 202198, out of the housing until it
allows the pinion gear to engage the driven gear. Screw a 3/8-24
nut on the spindle and hold with a box end wrench. Put a spacer
over the spindle needle bearing and clamp the housing in a vise.
Now proceed to loosen the spline adapter with a 14mm six (6)
point deep socket.
The pinion bearing retainer, No. 863564, may be removed by
utilizing a 5/8" hex nut and a 5/8" deep socket. Drop the hex nut
over the pinion shaft and engage the hex in the bearing retainer
and unscrew the retainer using the deep socket. Unscrew the
plug, No. 842366, and using a suitable driver, drive the pinion, No.
202624, and related bearings out of the angle head.
REASSEMBLY
The tool is reassembled in the reverse order of disassembly.
Wash all parts in a solvent and inspect for damage or wear. Rotor
blades should be replaced at every repair cycle or if they measure
less than 3/16" (4.7mm) at either end. Replace bearings that are
rough or have excessive end play.
IMPORTANT: When replacing pinion gear 202624 or driven
gear 202201, both gears should be replaced for best results.
When reassembling the spindle, No. 202194, bearing, No. 202197,
driven gear, No. 202201 and spindle lock nut, No. 202199, use
Locktite #271 on the spindle lock nut No. 202199. Also use #271
Locktite on the Spindle Bearing Cap No. 202196.
Slip pinion needle bearing, No. 869864, (unstamped end first) on
the pinion, No. 202624, and press (press on the bearing's stamped
end) the bearing in to a depth of 7/8" from the face of the bearing
bore. Install pinion ball bearing, No. 202333, (shield to the rear) and
bearing retainer, No. 863564, in the head and tighten retainer
securely using the 5/8" hex nut and 5/8" deep socket. Using a
suitable driver through the hole in the top of the head, drive the
pinion back to make sure it is seated properly in the head.
Important: When installing front rotor bearing. No. 202332, the
shielded side should be assembled toward the rear of the tool.
Install the front rotor bearing in the front bearing plate and measure
the distance from the face of the bearing plate to the inner race of
the bearing with the bearing race loaded rearward. Select or fit by
sanding a rotor collar .001" (.025mm) to .002" (.050mm) longer
than this measurement. Install the rotor blades, cylinder, rear
bearing plate and rear bearing on the rotor. After final assembly of
the motor unit, the cylinder should be held securely but not tightly
between the two (2) plates. The rotor should not rub either plate.
When installing the splined nut, No. 202236, on the rotor, the
undercut end should be toward the bearing.
When installing a motor into a rear exhaust backhead, the steel
ball located in the front plate must line up with the groove in the
backhead. Tighten all joints securely during reassembly. Head
positioning spacers are used to position the right angle head in
relationship to the throttle lever. Each .005" added or subtracted
will change the location of the head approximately 30 degrees.
Place a few drops of 10W machine oil in the air inlet to ensure
positive lubrication of all motor parts as soon as air is applied.
CAUTION: After the grinder is reassembled, be sure to check the
free speed (R.P.M.) for proper speed with a dependable tachom-
eter before returning the grinder to service.
SERVICE INSTRUCTIONS
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Страница 12: ...12 CooperTools 670 Industrial Drive Lexington SC 29072 Phone 803 359 1200 Fax 803 359 2013 www clecotools com...