PAGE 28 — MC94SK/PK CONCRETE MIXER • OPERATION MANUAL — REV. #0 (06/22/22)
MAINTENANCE (MIXER)
WHEEL BEARINGS
1. After
every 3 months
of operation, remove the hub
dust cap and inspect the wheel bearings (Figure 35).
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.”).
Figure 35. Wheel Hub and Bearings
2. Fill the wheel hub (Figure 35) 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.
MIXER CLEANING
It is important that the drum interior is free of dried material.
Obstructions can cause the paddle blades to lock against
the drum.
1. Push the
“Engine Stop”
button inward to the
OFF
position to the stop the engine.
2.
ALWAYS
disconnect the spark plug wire
before
cleaning the inside of the drum.
3. Place
“DO NOT Operate”
tag on mixer.
OIL SEAL
CONE BEARING
CONE
BEARING
BEARING
CUP
BEARING
CUP
4. At the end of each day’s operation, place mixer drum in
an upright position and spray inside of tub immediately
with water to prevent lumps of dried mortar or plaster
from forming and contamination of future batches.
5.
DO NOT
allow a buildup of materials to form on the
blades or anywhere inside the drum.
6. Rotate mixer to
dump
position and remove debris.
7.
Thoroughly clean
the entire mixer, wheels, cabinet
and frame.
8.
NEVER!
pour or spray water over the engine
Figure 36. No Spraying of Water
9. When cleaning of the entire mixer is done, return mixing
drum to an upright position.
TIRES/WHEELS/LUG NUTS
Tires and wheels are a very important and critical
components of the trailer. When specifying or replacing
the trailer wheels, it is important the wheels, tires and axle
are properly matched.
WARNING
DO NOT
attempt to repair or modify a wheel.
DO NOT
install an inter-tube to correct a leak
through the rim. If the rim is cracked, the air
pressure in the inter-tube may cause pieces
of the rim to explode (break-off) with great force and can
cause serious eye or bodily injury.
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