Dieci SAMSON AGRI MAX - Cylinder Lock Valves Maintenance

12 | Maintenance
250 DOCMA0000006‐UK ﴾ENG﴿ ‐ Samson FPT 3A
12.20 Cylinder lock valves maintenance
Thelockvalvesforcylinderspreventuncontrolledmovementofthepistonsofthecylindersintheeventof
hydraulicpressurefailureorburstingofahose.
Thevalvesareinstalleddirectlyonthecylinders.
DANGER
During the checking operations do not allow any person to stay within the radius of
action of the vehicle.
Check the valves individually.
In case of malfunction do not use the vehicle until it has been repaired.
Boom lifting cylinders:
– Starttheengine.Makesurethattheparkingbrakeisengagedandthetransmissionisinneutral.
– Lifttheboomtoapproximately45°.
– Withtheenginerunningat1400rpm,lowertheboom.Duringtheboommovementstoptheengine.
Theboommovementmustslowdownandthenstopwhentheengineslowsdownandstops.
DANGER
If the boom continues to move after stopping the engine, the lifting cylinders lock valve is
faulty.
Remove the fault as soon as possible, contact the DIECI service center.
Boom extension cylinder:
– Starttheengine.Makesurethattheparkingbrakeisengagedandthetransmissionisinneutral.
– Liftandfullyextendtheboom.
– Withtheenginerunningat1400rpm,retracttheboom.Duringtheboommovementstoptheengine.
Theboommovementmustslowdownandthenstopwhentheengineslowsdownandstops.
DANGER
If the boom continues to move after stopping the engine, the lifting cylinders lock valve is
faulty.
Remove the fault as soon as possible, contact the DIECI service center.
Cylinder tilt forks:
– Starttheengine,takealoadontheforks(forexample,aloadofbricksorsomebalesofhay).
– Tilttheforksfullyupward.
– Engagetheparkingbrakeandsetthetransmissionintoneutral.
– Swingtheboomawayfromthegroundsufficientlytoallowtheforkstotiltforward.
– Withtheenginerunningat1400rpm,operatethecontrollevertotilttheplateforward.Duringtheforks
movementstoptheengine.