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ESSICK EM-120SM — OPERATION AND PARTS MANUAL — REV. #5 (03/29/10) — PAGE 17
EM-120SM — MAINTENANCE
WHEEL BEARINGS
After every 3 months of operation, remove the hub dust cap and
inspect the wheel bearings. Once a year, or when required,
disassemble the wheel hubs remove the old grease and repack
the bearings forcing grease between rollers, cone and cage
with a good grade of high speed wheel bearing grease (never
use grease heavier than 265 A.S.T.M. penetration (“No. 2.”) Fill
the wheel hub with grease to the inside diameter of the outer
races and also fill the hub grease cap.
Reassemble the hub and mount the wheel. Then tighten the
adjusting nut, at the same time turn the wheel in both directions,
until there is a slight bind to be sure all the bearing surfaces are
in contact.
Then back-off the adjusting nut 1/6 to 1/4 turn or to the nearest
locking hole or sufficiently to allow the wheel to rotate freely
within limits of .001" to .010" end play. Lock the nut at this position.
Install the cotter pin and dust cap, and tighten all hardware.
IMPORTANT -DRUM HEAD SEAL CARE
On each end of the mixing drum is a drum head containing self
adjusting paddle shaft seals. These seals consist of packing
rings, split glands and spring actuated adjusters. A properly
maintained seal prevents material from working around the
paddle shaft, causing excessive wear. The following is a
suggested procedure of maintenance for protection of the paddle
shaft and bearings:
A. Keep the drum head clean of plaster built up, so the spring
adjusters will be free to work.
B. Replace with one new ring of packing and waterproof grease
when split gland or pressure plate is about to bottom out against
the end of the drum.
New Packing
When the old packing is to be completely replaced, coat shaft
and packing generously with a good grade of waterproof grease
and insert packing rings. Tighten the two spring adjuster nuts on
each end until the spring is compressed to 1-3/4 inches or the
top of the adjusting nut is even with the top of the drum head.
Also, whenever the paddle shaft is removed, new waterproof
grease should be packed around the ball bearings in the drum
heads before reinstalling the shaft. Fill the cavity completely.
CAUTION:
PADDLE SHAFT BEARINGS
The paddle shafts in the Essick EM120PM mixers rotate in sealed
ball bearings, which require no additional lubrication as they
are packed and sealed at the factory.
There is, on each end of the mixing drum, an zerk grease fitting.
Oil these fittings two or three times each week as they lubricate
the dumping mechanism of the mixing drum.
■
Failure
to lubricate the zerk grease fittings
two or three times a week will cause the
dumping mechanism to stiffen, making the
mixer hard to dump.
BOLT CONNECTOR
A 5/8 " x 4 1/4" bolt is used as a connector pin located between
the reduction gear assembly and the paddle shaft. It is designed
to protect the transmission in the event a rock or other object
should get caught between the paddle blade and the drum, this
pin may shear. It is recommended that an extra bolt be kept on
hand so as to quickly make a replacement, if necessary.
CLUTCH REDUCTION ASSEMBLY LUBRICATION
The clutch reduction assembly has two separate compartments.
Each of which must be filled with its proper lubricant and checked
at regular intervals.
The
clutch compartment
should be filled with a good grade of
number 30 SAE engine oil which can be poured through the
filler hole located just above the clutch inspection door on the
opposite side of the transmission. Fill the clutch compartment
with 30 SAE engine oil until it overflows the oil level plug located
on the shifter side of the clutch compartment . Check this oil level
every two or three months and add oil as required. Drain and
refill once a year.
The
reduction gear, upper compartment
should be filled with
number 90 SAE oil, as used in automobile transmissions. The
filler plug is at the top of the reduction gear case and the oil level
plug is on the same side of the case as the clutch lever. Fill the
reduction gear compartment with 90 SAE transmission oil until it
overflows the oil level plug. Check this oil level every two or
three months and add oil as required. Drain and refill once a
year..