Husqvarna 435, 435E and 440E chainsaw clutch and sprocket guide will help with any sprocket and clutch replacement, inspection and correct running of the chainsaw. A Service Manual detailing the clutch and sprocket removal and refitting procedures with full diagrams, as well as more complete chainsaw repair information, is available to download. Also a Husqvarna and 435, 435e and 440e Parts List, Operator Manual, and Zama carburetor manual are also available to view or download as a PDF which can be read on any device or easily printed.

Centrifugal clutch – removal

Fig 13

1

Remove the cylinder cover. Disengage the chain brake by pushing the kickback guard backward. Undo the bar nut and remove the clutch cover, bar, and chain (see figure 13).

2

Disconnect the HT lead. Remove the spark plug and fit piston stop 502 54 15-01 (A) in its place (see figure 14).

3

Fig 14

Unbolt the clutch using tool 502 54 16-03 (B) and a suitable socket or wrench. Turn the clutch clockwise to remove it (see figure 15).

4

Fig 15

Secure the clutch in a vice as shown in figure. Carefully release the clutch springs (C) (see figure 16).

NOTE!

Handle the clutch springs carefully. If they are opened up too much they could damage the saw.

Inspection and cleaning

Fig 16

• Clean and inspect all parts carefully. If there are any cracks or other defects replace the damaged parts with new ones. Always use original parts.

• Check the thickness of the clutch shoes by using vernier calipers to measure the diameter of the clutch. If the diameter is less than 60 mm the clutch assembly must be replaced (see figure 16).
  1. Centrifugal clutch – refitting

1

Insert the clutch springs in the shoes.

2

Screw the clutch (anti-clockwise) until it stops. Now tighten using tool 502 54 16-03 and a suitable socket wrench or combination spanner. Tightening torque min. 20 Nm.

3

Fig 17

Remove the piston stop. Fit the spark plug, tightening it to a torque of 20 Nm, then connect the HT lead.

Then refit:

• • cylinder cover
  • guide bar
  • chain
  • clutch cover

Husqvarna 435, 435e, 440e How to change the Clutch and Sprocket