HUSABERG FE 450 AUS, Repair Manual

Page: 126 / 285

30/ENGINE - WORK ON THE INDIVIDUAL PARTS
124
19.26
Checking the timing assembly
0 0 1 1
0 0 5 5
0 0 1 1
0 0 3 3
0 0
2 2
0 0 4 4
300523-01
–
Clean all parts well.
–
Check the timing chain wheel/timing chain sprocket

for damage and wear.
» If there is damage or wear:
–
Replace the timing chain wheel/timing chain sprocket.
–
Check the timing chain tensioning rail

for damage and wear.
» If there is damage or wear:
–
Replace the timing chain tensioning rail.
–
Check the timing chain guide rail

for damage and wear.
» If there is damage or wear:
–
Replace the timing chain guide rail.
–
Check the timing chain securing guide

for damage and wear.
» If there is damage or wear:
–
Replace the timing chain securing guide.
–
Check timing chain

for damage and wear.
» If there is damage or wear:
–
Replace the timing chain.
–
Check the timing chain links for smooth operation. Let the timing chain hang down
freely.
» The chain links no longer align in a straight line:
–
Replace the timing chain.
19.27
Preparing the timing chain tensioner for installation
200171-10
–
Press the timing chain tensioner together completely.
Info
This requires some some force, as the oil must be pressed out.
Without pressure, the timing chain tensioner extends again completely.
200172-10
–
Place two spacing washers or similar aids next to the timing chain tensioner piston.
This ensures that, when pressed in, the piston cannot go in all the way.
Guideline
Thickness of the spacing washers 2… 2.5 mm (0.08… 0.098 in)
–
Release the timing chain tensioner.
The detent mechanism engages and the piston remains in place.
Final position of the piston after
engagement 3 mm (0.12 in)
Info
This position is necessary for installation.
If the timing chain tensioner is now pressed again (in an installed state),
and only extended a maximum of half way (therefore preventing it from
extending completely), this blocks the detent mechanism and the timing
chain tensioner can no longer be squeezed together. This function is neces-
sary in order to ensure sufficient timing chain tension at low oil pressures.