MULTIQUIP Whiteman Series Operation Manual page 37

WHEEL BEARINGS
1. After every 3 months of operation, remove the hub
dust cap and inspect the wheel bearings (Figure 46).
Once a year, or as needed, disassemble the wheel
hubs and remove the old grease. Then repack the
bearings, forcing grease between the rollers, cone and
cage with a good grade of high-speed wheel bearing
grease. NEVER use grease heavier than 265 ASTM
penetration ('No. 2').
OIL SEAL
CONE BEARING
BEARING
CUP
Figure 46. Wheel Hub and Bearings
2. Fill the wheel hub (Figure 46) with grease to the inside
diameter of the outer faces and also fill the hub grease
cap.
3. Reassemble the hub and mount the wheel. To make
sure all of the bearing surfaces are in contact, tighten
the adjusting nut while turning the wheel in both
directions until there is a slight bind.
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 0.001–0.010 inches of
end play. Lock the nut at this position. Install the cotter
pin and dust cap and tighten all hardware.
WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 37
CONE
BEARING
BEARING
CUP
MAINTENANCE (MIXER)
MAIN GEAR AND DRIVE PINION ALIGNMENT
1. Disconnect the spark plug wire (gasoline engines).
If the mixer is equipped with an electric motor,
disconnect the power cord from the AC power
receptacle. Make sure the clutch engagement lever
is disengaged to relieve V-belt tension.
2. The countershaft and drive pinion are mounted on a
slotted base. To align the drive pinion with the main
gear, loosen the pillow block mounting bolts and move
them until the necessary alignment has been made.
Remember that the gears must be aligned in parallel,
not skewed.
3. Using your hand, slightly move (rock) the drive pulley
back and forth to determine the amount of backlash.
Insert a feeler gauge between the gears to determine
the backlash distance. Backlash should range between
0.007–0.012 inches (Figure 47).
MAIN GEAR
GEAR TEETH
PINION GEAR
0.007 - 0.012 INCHES
(MAX. BACKLASH)
Figure 47. Drive Pinion and Main Gear (Backlash)
MAIN GEAR
(BULL GEAR)
DRIVE
PINION