Husqvarna K770 SmartGuard Workshop Manual page 55

assembly. Do not replace one shoe from a different
clutch as this causes bad balance.
The inner diameter of the clutch drum must not be more
than 79.8 mm. Replace if necessary with a new clutch
drum.
6.13.3 To assemble the clutch
WARNING: Risk of injury. Assemble the clutch
with the correct tightening torque. Use a torque
wrench.
• Tighten the clutch with a torque of 37–43 Nm.
1453 - 001 - 02.04.2020
6.13.4 To remove and install the clutch springs
1. Put a large screwdriver in each spring end.
2. Expand the spring with circlip pliers and remove the
spring.
3. Install in opposite sequence.
6.13.5 To examine the clutch shoes and hub
CAUTION: Do not lubricate the clutch.
• Make sure the shoes move easily in their grooves.
Clean if it is necessary.
6.13.6 Belt pulley bearings
The clutch drum and the belt pulley are connected units.
The belt pulley has 2 permanently lubricated ball
bearings that are adjacent to each other without
spacers. The outer rings of the ball bearings are
installed with a light force on the belt pulley. They are
installed with a sliding fit against the crankshaft. This
means that the belt pulley can easily be pulled from the
crankshaft when disassembling the clutch.
6.13.7 To remove the belt pulley bearings
Use the bearing press for the clutch drum bearing. Refer
Servicing tools overview on page 10 . Use the tool to
to
disassemble and install the bearing. The tool kit has a
support plate for the bearing (A), the sleeve (B) and the
cover (C). The cover has different contours. One side
aligns with the sleeve when you disassembe and the
other aligns with the clutch drum when you install. The
Repair and servicing - 55