7
The 1200VDL Series Grinders are designed to operate on
90psig (6.2 bar) maximum air pressure, using a 1/2" hose
up to 8' in length. 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
increases tool life and keeps the tool in sustained opera-
tion. The in-line lubricator should be regularly checked and
filled with a good grade of 10W machine oil. Proper adjust-
ment 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.
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 run for several seconds to distribute the oil before
disconnecting from the air supply.
DISASSEMBLY
Disconnect the tool from the air supply and remove the
grinding wheel, guard, and throttle lever assembly. Use a
5/16" hex wrench (clamped in a vise) to hold the rotor shaft
and unscrew the driving flange, No. 869809. Removing the
four (4) housing bolts, No. 202360, and governor housing,
No. 202375, will allow the motor unit to be removed from the
housing. Unscrew (left hand threads) and remove the
governor body and related components. Remove the cyl-
inder, No. 202362, five (5) rotor blades, No. 202352.
Remove the rotor collar at this time to prevent its being lost.
To disassemble the governor assembly, clamp the rotor
vertically in the vise with the rear shaft up. Unscrew (left
hand threads) the governor assembly from the rotor. De-
press the adjustment ring, No. 867214, down far enough to
slip the adjustment ring pin, No. 867187, out of the gover-
nor body. Remove the governor spring and valve. If inspec-
tion of the governor weight dictates removal from governor
body assembly, use a 1/16" pin punch to remove the two
(2) groove pins, No. 864821. Use the punch on the opposite
side of the governor body (smaller hole) to remove the two
OPERATING INSTRUCTIONS
SERVICE INSTRUCTIONS
Replace if 3/8"
(9.5mm) or less
at either end.
(2) governor weight pins, No. 833862. Do not disassemble
the governor body any further. Inspect the governor weights
and weight pins for wear and replace if necessary.
Note: During reassembly, be sure the two (2) groove pins
are in place and retain the two (2) weight pins in the body.
Should a ball release spring need replacing, drill out the old
rivets and replace. Be sure the replacement spring is
securely riveted in place. The RPM rating etched on the
spring must match the rated RPM of the tool. Unscrew the
inlet bushing, No. 867758, for inspection and cleaning of
the air screen. If clogged or torn, the inlet bushing should
be replaced. The throttle valve may be removed for inspec-
tion at this time. Unscrew the two (2) throttle handle bolts,
No. 813041, for inspection and cleaning of the air screen,
No. 202353. Replace the screen if clogged or torn.
REASSEMBLY
The tool is reassembled in the reverse order of disassem-
bly. All parts should be thoroughly cleaned and inspected
before reassembly. Particular attention should be paid to
the rotor blades and rotor bearings as failure of these parts
could cause damage to more expensive components.
Rotor blades should be replaced if they measure 3/8"
(9.5mm) or less at either end.
Rotor bearings should be replaced if they are rough or have
excessive looseness, or if the rotor has worn into the rear
bearing plate face more than .005" deep.
Do not strike governor in any way. The shut-off disc
assembly No. 201073, should be replaced if the shut-off
disc has been tripped in service. If the 3/8" ball has tripped
the shut-off disc, the problem causing excessive overspeed
must be corrected. The governor valve, No. 867185, should
be free but not loose on the governor body. The one (1)
3/8" steel ball should be firmly seated in the governor body.
During reassembly of the motor unit, the rotor must be
positioned by the rotor collar, so that when assembled, the
rotor will have .002" (.051mm) clearance between it and the
front bearing plate. Install the front rotor bearing, No.
869818, in the front bearing plate, No. 202367, (make sure
the bearings' outer race is firmly seated). Pressing on the
inner race and measuring from the face of the bearing plate
to the bearing's inner race. Select, or fit by sanding, a rotor
collar .002" (.051mm) longer than this measurement.
Содержание 1200 Series
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