FHM BACKHOE BH 8, Руководство по эксплуатации и запасным частям

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Farmer-Helper BH 8 & 9 26 Revision 08 - 2017
System relief valve
squeals.
Cold Hydraulic Fluid
Allow hydraulic fluid to warm up
to operating temperature
Hydraulic Oil viscosity too heavy
Check oil number and viscosity,
Refill correct hydraulic oil.
Excessive load in bucket. Loading
exceeds specified backhoe capacity
Reduce load
Relief valve setting below
specifications
Check and reset valve setting as
needed
Hydraulic hose, tube line or quick
disconnect coupler restriction
Check for evidence of restriction in
hydraulic oil flow. Repair or
replace defective components
Backhoe drops with
valve spool in
"centered" position
(no external oil
leakage evident) Note:
A gradual drop over
an extended period of
time is a normal
Cylinder piston assembly leakage Check cylinders for leakage
Control valve internal leakage Replace control valve and recheck
Control valve spool(s)
will not return to
centered position
Control lever linkage binding
Determine origin of binding and
repair
Control valve spool centering is
broken
Replace centering spring
Control valve spool binding in
Disassemble valve for inspection
and repair.
External hydraulic
fluid leakage
Loose hydraulic connection Tighten loose connections
Defective hydraulic hose, tube line,
adapter fitting or adapter fitting
Check for origin of oil leak and
replace defective part.
Control valve o-rings defective
Replace defective o-rings
Control valve spool or body
damaged or worn
Replace control valve
Cylinder rod packing set leakage
Check cylinders for leakage. Repair
Hydraulic pump
capacity inadequate
Cold hydraulic fluid
Allow hydraulic fluid to warm up
to operating temperature
Engine R.P.M. too slow
Increase engine R.P.M
Low hydraulic fluid supply
Refer to Tractor Operator's Manual
for service recommendations
Hydraulic hose restriction
Check for evidence of restriction in
hydraulic hoses
Refer to Tractor Operator's
Manual for recommended service
procedures. Replace hydraulic
Cylinder rod bend
when cylinders
extended
Excessive shock load on cylinders
during transport
Replace defective parts. Review
and observe proper and safe
operational practices