Crankcase - Husqvarna K770 Workshop Manual

4. Press down the cylinder on the piston and let the
piston ring compressor move along the piston.
Tighten the screws crosswise to a torque of 10–11
lbf·ft/14–15 Nm.

6.12 Crankcase

6.12.1 To examine the crankcase for leaks
A crankcase with a leak has lower crankcase
compression. A typical sign is that the product cannot
easily start.
The tool kit cylinder seal, refer to
overview on page 10 , has parts for sealing the exhaust
and inlet ports of the cylinder. It also has a sealing plug
that replaces the decompression valve. Use a pressure
tester or equivalent for the test, refer to
651 - 001 - 27.06.2018
Servicing tools
Servicing tools
overview on page 11 . Before the test, turn the
crankshaft until the exhaust port is fully open. The piston
must be at its bottom turning point.
1. At the exhaust port, attach the exhaust port seal on
the cylinder by the position of the muffler.
2. At the inlet port, loosen the screws at the lower part
of the carburetor.
3. Put the inlet seal in position and put in the screw. Be
careful of the strap. Pull the lower part carefully.
Repair and servicing - 47