Specifications

SRM6O+/SRM8O+
REPAIR INSTRUCTIONS
(Including Disassembly, Replacement and Reassembly)
A2 GEARBOX (Fig. 3)
GEARBOX REMOVAL:
Run mixer and shift to first speed then turn off.
WARNING; FOR SAFETY, DISCONNECT ELECTRICAL SUPPLY.
Remove set screw (Fig. 3 [16]) and drain oil.
Remove rear access panel (Fig. 10 [22]), top cover (Fig. 10 [17)),
instruction on page 4.
Remove drive belt per instructions (1) in Mechanics Maintenance.
Remove speed control assembly (Fig. 8)
See Speed Control Disassembly.
Loosen two allen set screws (Fig. 1 1 [4)) that secure input pulley (Fig. i 1
[5)) and remove pulley completely from input shaft (Fig. 6 [10)).
Remove gearbox cover (Fig. 3 [2]). Remove remaining oil from gearbox.
WARNING - FOR SAFETY! The gearbox is very heavy, weighing
approximately 261 pounds and must, therefore, be supported safely before
starting step number (10),
It is recommended that a portable hydraulìc
crane of sufficient capacity be used. A chain may be attached to the PTO.
shaft (Fig. 5 [1 1)) at mìd-length. Use care not to rub or scrape the gears.
Remove four cap screws (Fig. 3 [1 1]) securing gearbox housing to mixer
housing. Remove gear box assembly and place on work bench.
i i .
Rotate gear train by hand and inspect for worn or chipped gears, bent shaft,
worn bearings and excessive backlash. Backlash measured at gear teeth
exceeding 1/32" is considered excessive. After trouble has been isolated,
proceed to disassemble.
GEARBOX DISASSEMBLY:
1.
Beater Head (Fig. 4)
Remove cap screw (Fig. 4 [21]) and remove beater head assy. If beater
head does not drop easily, use the two jacking screws (Fig.
4 [19]) to
assist in removal. Do not pry against outer rim of beater head housing
(may cause breakage).
Remove top retaining ring [9], gear [1 1], bottom retaining ring [9),
key [7], seal [10), retaining ring [9), retaining ring [S), and press shaft
[2] (at gear end) from housing [1].
C.
Press bearings [4 & 6] along with spacer [5) from housing [1).
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