Stow Plaster and Mortar Mixer MS-63 User Manual

Page 29

STOW MS-63 MIXER — OPERATION AND PARTS MANUAL — REV. #5 (03/26/10) — PAGE 29

GEAR LUBRICATION

The surface of the pinion and main gear (Figure 32) should be
very lightly greased.

Figure 32. Pinion and Bull Gear Lubrication

STOW MS-63 PLASTER/MORTAR MIXER — MAINTENANCE (MIXER)

MAIN GEAR AND DRIVE PINION ALIGNMENT

Disconnect the spark plug wire

(gasoline engines). If

mixer is equipped with an electric motor

remove power

cord from AC power receptacle

. In addition make sure

the clutch engagement lever is

dis-engaged

to relieve V-

belt tension.

The countershaft and drive pinion are mounted on a slotted
base. To align drive pinion with main gear, loosen the pillow
block mounting bolts and move them until the necessary
alignment has been made. Remember gears must be
paralleled aligned not skewed.

Using your hand, slightly move (rock) the drive pulley back
and forth to determine the amount of backlash. Insert feeler
gauge between gears to determine backlash distance.
Backlash should range between 0.007- 0.012 inches
(Figure 30).

INSPECT TOOTH CONTACT BETWEEN MAIN GEAR AND
DRIVE PINION

Coat 3 or 4 teeth at 3 different positions on the main gear
with yellow paint.

Rotate the drive pulley in both directions.

Inspect the tooth pattern.

If gear teeth are not contacting properly (Figure 31), adjust
pillow block to correct the problem.

Figure 30. Drive Pinion and Main Gear (Backlash)

Figure 31. Gear Teeth Alignment

Fill the wheel hub (Figure 28) 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.

NOTE

Grease main and pinion gears
every

250 hours of operation

IMPORTANT! avoid over-
greasing. Excess grease will
accumulate contaminates and

cause premature wear.