Quicke Q20, Техническое руководство

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5:2 2006-01
Trouble shooting
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Problem Possible cause Action
Lifting and tool cylinders do not
function Low hydraulic oil level. Check and top up with hydraulic oil.
Hydraulic hoses wrongly connected. Check and connect the hoses correctly.
Hydraulic hoses to/from control valve
are ”blocked”. Check hoses for damage (kinks, twists
etc.)
Loader control valve or tractor main
reduction valve has stuck open. Contact Alo Technical support.
Low system pressure from pump. Contact Alo Technical support.
Lift or tool cylinders not working Break in control cable for control valve. Inspect. Change if necessary.
Hydraulic quick-release couplings not
fully inserted. Check coupling. Change coupling(s) as
necessary.
Blocked hydraulic hose / pipe. Look for damage to hose/pipe which
could block oil flow between cylinder
and control valve.
Piston unit damaged (does not seal). Contact Alo Technical support.
Blocked control valve. Contact Alo Technical support.
Damaged quick-release coupling. Change quick-release coupling.
Lift and/or tool cylinders working in the
wrong direction compared to lever
deflection Hydraulic hoses wrongly connected. Connect hydraulic hoses to correct
union.
Control cables for single lever control
wrongly connected. Contact Alo Technical support.
Air in hydraulic oil (generally shown by
foaming) Low hydraulic oil level. Check and top up with hydraulic oil to
correct level.
Air leakage in hydraulic pump suction
side Contact Alo Technical support.
Foaming due to use of wrong type of
oil. Read the tractor instruction manual and
use the recommended type of hydraulic
oil.
Slow or jerky lifting movement Low hydraulic oil level. Cold hydraulic
oil. Check/top up the hydraulic oil. Let the
hydraulic oil warm up to working
temperature.
Engine speed too low (hydraulic pump
speed is then too low). Increase engine speed to improve loader
performance.
Too heavy load in bucket. Material
weight exceeds loader’s specified
capacity. Reduce the load in the bucket.
Control valve cable system binds or is
damaged. Contact Alo Technical support.
Air in the hydraulic oil. See ”Venting the hydraulic oil”.
Hydraulic quick-release couplings not
fully inserted. Check the couplings. Repair or change.
Restriction in hydraulic hose or pipe
(hoses/pipes have become twisted or
crushed). Check hoses/pipes for signs of restric-
tion.
Lifting cylinder piston unit leaks. Contact Alo Technical support.
Pressure limiting valve working
irregularly or set too low. Contact Alo Technical support.
Internal leakage in control valve
(bypass flow in valve). Contact Alo Technical support.
Low capacity in hydraulic pump. See ”Low pump capacity”.