Rivera Primo Brute II Classic & Classic - Manual (Page 2)

Remove all OEM drive train components and thoroughly clean the
inner primary. Inspect the inner primary for cracks or other damage.
The serrated plate must remain in place if you are installing the
11 mm Brute II Classic TM (as shown). It may be removed if you are
installing the 8mm Brute Classic TM .
Note: Make sure the inner primary bolts are safety-wired or use
Loctite. Studs should have nylock nuts!
Check the fit of the clutch hub on the mainshaft first, making sure it
fits properly & there are no burs, etc. Remove the clutch hub & then
install the KEY in the KEYWAY ensuring that it is correctly seated and
oriented so that the clutch hub will slide into place on the transmis-
sion main shaft. If you cannot seat the key correctly, check for burrs
on the key or keyway, deburr as needed and reinstall.
Caution: Keyway must remain stationary when basket is installed.
Install the clutch hub / rear basket assembly on the main shaft, and
the front pulley on the motor shaft. Hand tighten the nut on the main
shaft. Hold a straight edge firmly against the inner surface of the ring
gear as shown. The outer edge of the front pulley must line up with
the inner surface of the ring gear as shown before proceeding.
Shims can be inserted or removed behind the front pulley to achieve
correct pulley alignment.
Order part number PX-1, a package of 5 different shims. . .
(.020”, .030”, .050”, .075” and .100”)
After correct pulley alignment is established, install the belt on the
pulleys, slide the pulleys into place taking care that the KEY is cor-
rectly seated in the KEYWAY (rear pulley-hub assembly). Place
2 drops of thread lock (blue) on the threads of the clutch hub nut
prior to permanently installing the nut. TIGHTEN THE CLUTCH HUB
NUT TO 70-80 FOOT POUNDS using a high-quality torque wrench.
REPEAT THE PROCEDURE FOR THE MOTOR SHAFT NUT.
TIGHTEN TO 150-165 FOOT POUNDS using a quality torque
wrench or air impact driver.
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