Hartzell HC-B3-2 Series Owner's Manual And Logbook page 132

CAUTION:
(13) Examine the beta ring to make sure that it is not in
contact with any engine components or mounting bolt
safety wire.
(a) If there is contact between the beta ring and any
engine components or mounting bolt safety wire,
consult qualified personnel at an appropriately
licensed propeller service facility.
(14) Install the carbon block into the beta linkage lever per
the airframe manufacturer's instructions.
CAUTION 1:
CAUTION 2:
(15) Install the carbon block assembly (Figure 3-7) into the
beta ring.
(16) Install, adjust and safety the beta linkage per the
airframe manufacturer's instructions.
INSTALLATION AND REMOVAL
Propeller Owner's Manual
THE BETA RING MUST NOT CONTACT ANY
ENGINE COMPONENT OR MOUNTING BOLT
SAFETY WIRE. THE BETA SYSTEM COULD
BE DAMAGED IF IT CONTACTS ANY STATIC
ENGINE COMPONENT WHILE ROTATING.
FIT THE BLOCK IN THE BETA RING WITH
A SIDE CLEARANCE OF 0.001 INCH
(0.03 mm). REFER TO FIGURE 3-6.
MAXIMUM SIDE CLEARANCE
PERMITTED IS 0.010 INCH (0.25 mm)
IN ACCORDANCE WITH THE CARBON
BLOCK ASSEMBLIES SECTION IN THE
MAINTENANCE PRACTICES CHAPTER
OF THIS MANUAL.
139
61-00-39
Rev. 17 Apr/20
Page 3-32