Repair instructions
8
When replacing the cylinder 340, 345:
Unscrew the decompression valve. (345)
Remove the intake system, see “Air intake system
–
removal”.
•
Measure piston ring wear. This should not
exceed 1 mm. Use the piston to push down the
piston ring.
Model 350 is fitted with a spacer, which is secured
using four bolts from the underside. The spacer
does not however need to be removed when re-
moving the cylinder.
•
•
•
•
The needle roller bearing is undamaged.
The inlet manifold is undamaged.
Pressure test the decompression valve.
Also refer to Jonsered’s Analysis guide for piston
failures, art. no. 108 07 01-01.
Decompression valve – pressure
testing
1
Cleaning and inspection
Clean all the components, scraping off all traces of
old gasket and carbon from the following places:
•
•
•
•
Piston crown
Top of the cylinder bore
Cylinder exhaust port
Decompression valve channel (340, 346XP, 350, Connect tool 502 50 38-01 to the decompression
351, 353)
valve.
•
Cylinder base and/or crankcase
2
Pump up the pressure to 80 kPa (0.8 bar).
Check the following:
3
Wait 30 seconds.
•
The surface coating of the cylinder is not worn
through, especially in the upper part of the cylin-
der.
4
The pressure should not be less than 60 kPa
•
•
The cylinder is free from score marks and areas
of wear.
(0.6
bar).
The piston is free from score marks. Small
scratches can be polished out with fine emery
paper.
•
The piston ring is not burnt into its groove.
English – 43
| Categories | Chainsaw Manuals, Husqvarna Chainsaw Manuals |
|---|---|
| Tags | Husqvarna 340, Husqvarna 345, Husqvarna 346XP, Husqvarna 350, Husqvarna 351, Husqvarna 353 |
| Model Year | 2003, 2004, 2005, 2006 |
| Download File |
|
| Document Type | Operator's Manual |
| Language | English |
| Product Brand | Husqvarna, Chainsaw |
| Document File Type | |
| Publisher | husqvarna.com |
| Wikipedia's Page | Husqvarna |
| Copyright | Attribution Non-commercial |
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