Inspection For Correct Venting (Priming) Of Hydraulic Valve Tappets - Rotax 914 series Installation Manual

13.11)Inspection for correct venting (priming) of hydraulic valve tappets

(See Fig. 45)
The subsequent check procedure describes the correct method to verify adequate
priming of hydraulic valve tappets.
■ CAUTION:
- Remove valve cover on cylinder 1.
- Turn crankshaft direction in of normal rotation so that the piston on cylinder 1 is on
ignition top dead center (both valves are closed).
- Press on push rod side of rocker arm with a force (F) of about 70 N (15.0 lbf.) for
about 3 sec. Approximate force can be verified with a fan belt tester. Repeat on other
rocker arms.
- Check distance between rocker arm and valve contact surface. Max. allowable
distance 0,5 mm (0,02 in.).
- Repeat on all other cylinders.
■ CAUTION:
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
Engine has reached operating temperatures here. Use appropriate
safety equippment and clothing.
If it is possible to push the valve tappets further than this limit, an
additional engine run for about 5 min. at 3500 rpm after refitting the
valve covers is necessary. To get the hydraulic valve tappets primed,
this process can be repeated another 2 times.
page 78
July 01/2008