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PAGE 18 — WM120PM/SM— OPERATION AND PARTS MANUAL — REV. #7 (09/15/11)
WM-120P/S — 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.
SHAFT SEALS
CAUTION:
IMPORTANT -DRUM HEAD SEAL CARE
Grease seals every 40 hours of operation using
any grade #1 lithium base grease. Apply
grease until visible inside of mixing tub (over
grease). this will purge seal system of
contamination.
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.
PADDLE SHAFT BEARINGS
The paddle shafts in the Whiteman WM120P/S 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.
CAUTION:
■
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.
BEARING BRACKET
Grease the bearing bracket every month.
CLEANING
Always disconnect the spark plug wire before cleaning the inside
of the drum.
Never pour or spray water over the gasoline engine or electric
motor.
For consistent performance, long life and high quality mixing,
thoroughly clean the mixer inside and out at the end of each
day’s operation. To prevent lumps of dried mortar from forming
and contamination of future batches, do not allow a buildup of
materials to form on the blades or anywhere inside the drum.
NOTE
This connector pin bolt is special. When replacing this
bolt consult the parts section of this manual for the
correct part number.