English
Install spur chain sprocket / rim sprocket
NClean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory)
NSlide needle cage onto the crankshaft stub
NAfter refitting, turn the clutch drum and/or spur chain sprocket approx. 1 full turn so that the carrier for the oil pump drive engages
NRefit the rim sprocket – cavities toward the outside
NRefit washer and
44
Maintaining and Sharpening the Saw Chain
Cutting effortlessly with a correctly sharpened chain
A properly sharpened chain slices through wood effortlessly and requires very little feed pressure.
Do not work with a dull or damaged chain as it will increase the physical effort required, produce unsatisfactory results and a higher rate of wear.
NClean the chain.
NCheck the chain for cracks in the links and damaged rivets.
NReplace any damaged or worn parts of the chain and match the new parts to the shape and size of the original parts.
It is absolutely essential to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened – and in particular if the depth gauge is set too low – there is a risk of increased kickback of the saw, with resulting risk of injury.
3/8
689BA020 KN
The chain pitch (e.g. 3/8") is marked on the depth gauge end of each cutter.
Use only special saw chain sharpening files. Other files have the wrong shape and cut.
Select file diameter according to chain pitch – see table “Sharpening Tools”.
You must observe certain angles when resharpening the chain cutter.
A
B | KN |
689BA021 | |
|
ASharpening angle
BSide plate angle
Chain type | Angle (°) | |
| A | B |
Rapid Micro (RM) | 30 | 75 |
Rapid Super (RS) | 30 | 60 |
Picco Micro (PM) | 30 | 75 |
Cutter shapes Micro =
The specified angles A and B are obtained automatically if the recommended files or sharpening tools and correct settings are used.
The angles must be the same on all cutters. If the angles are uneven: Chain will run roughly, not in a straight line, wear quickly and finally break.
MS 880