Quicke Q20, Техническое руководство

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Trouble shooting
2005-09 5:5
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Trouble shooting Compact valve
W/O Without options
3rd 3rd function mounted
4th 4th function mounted
Man Manual operation of loader suspension
El. Electrical operation of loader suspension
W/O 3rd 4th Man El Problem Causes Remedy
X Internal leakage too high Shock valves open at too
low pressure Check pressure in line
3 or 4
Replace spool
External leakage Screws not tightened
Defect seal Tighten screws
Replace seals
X Internal leakage too high Shock valves open at too
low pressure Check pressure in line
3 or 4
Replace spool
Internal leakage too high Check valves leaking Replace servo block
3rd function not working No signal for valve Measure voltage at connector
Too low servo pressure Hook on an implement or
increase rpm
Spool sticking Remove spool for inspection
X Internal leakage too high Check valves leaking Replace servo block
4th function not working No signal for valve Measure voltage at connector
Too low servo pressure Hook on an implement or
increase rpm.
Spool sticking Remove spool for inspection
Internal plug missing Mount plugs
External leakage between
3rd and 4th function Fittings not tightened Tighten through ports “U” and
”S”
Defect seals Replace seals
X Suspension not working Shut-off knob in wrong
position Turn knob with float position
activated
Accumulator(s) defect Measure length of lift cylin-
ders with half load in bucket.
Dump load and measure
extension of lift cyl.
Boom lowering with knob
in position III Check valve in port “N”
infected by dirt Force bucket towards ground
with high rpm.
Check valve in port “N”
defect Remove check valve for
inspection
X Suspension not working El. shut-off valve not
activated Measure electrical signal
Accumulator(s) defect Measure length of lift cylin-
ders with half load in bucket.
Dump load and measure
extension of lift cyl.
Boom lowering with
function “ON” Check valve in port “N”
infected by dirt Force bucket towards ground
with high rpm.
Check valve in port “N”
defect Remove check valve for
inspection