Husqvarna 450 Rancher, Руководство по ремонту, Страница: 111 / 708

REGISTRAZIONI E REGOLAZIONI
SETTINGS AND ADJUSTMENTS
RÉGLAGES ET CALAGES
EINSTELLUNGEN UND REGULIERUNGEN
AJUSTES Y REGULACIONES
Part. N. 8000 A5911 (03-2006) D.7
Adjustment of valves play
To check the valve clearance, proceed as follows , WITH COLD ENGINE:
- remove the fuel tank as shown on page E.21;
- remove the spark plug (1), the four cylinder head cover fastening screws
(2) and the cylinder head cover;
- engage second gear and, moving the vehicle forwards and backwards,
bring the piston to Top Dead Center
(in this condition, the mark on the
cylinder head is aligned with the two marks on the idle gear of the
camshafts, as shown in the figure);
- check, by means of a feeler gauge, that the valve clearance is 0,10-0,15
mm (0.004-0.006 in.) for INTAKE and 0,15-0,20 mm (0.006-0.008 in.) for
EXHAUST;
- otherwise, lift the retaining clip (3) using a hook, let the rocker arm slide to
one side, extract the pad with a pair of pliers and check the thickness;
- depending on the result, fit a new pad (as spare parts, pads are supplied
ranging from 1.60 mm-0.063 in. to 2.60 mm-0.102 in. in steps of 0.05 mm-
0.002 in.).
The new pad thickness (S) will be:
S=(G1-G)+S1
S=new pad thickness
G1=measured valve clearance
G=correct valve clearance
S1=measured pad thickness
Reassemble the clip and rocker arm then turn the crankshaft a few times.
Check the valve clearance again and, if it’s correct, reassembly the removed
parts using the reverse procedure.