INSTRUCTION MANUAL - Virtasenkauppa.fi

This troubleshooting chart is provided for reference to possible backhoe operational problems. Determine
the problem that best describes the operational problem being experienced and eliminate the possible
causes as listed by following the correction procedures.
As an initial step in the troubleshooting procedure, various preliminary checks should be made. These
checks are important in that once performed they need no longer be considered as a possible cause of the
immediate malfunction.
1. Check oil level.
2. Check for external oil leaks.
3. Check for external mechanical damage such as kinked hoses or tubes, damaged cylinders, bent or
binding structural members.
After having performed the preliminary checks and failing to locate the cause of the malfunction, the
following procedure should be sued:
4. If possible, operate the backhoe making a note of the operating characteristics and failure. Cycle
each control lever to operate each of the cylinders in both the extended and retracted positions.
5. Compare the operating characteristics observed in step 1 with the problems covered in the trouble
shooting chart to determine the areas of failure.
Troubleshooting diagram
Problem Possible cause Correction
Very slow operation Low RPM Set RPM at recommended level
Incorrect oil
Use high quality tractor oil or equivalent
Swing, boom,
dipperstick and
bucket cylinders
not operating
properly
Slow oil supply
Restriction in hydraulic hose
Restriction in the inlet hose
Low hydraulic fluid level.
Hydraulic hoses connected
improperly
Hydraulic hoses to/from control
valve blocked
Backhoe control valve or
tractor main relief valve stuck
open
Low system pressure supplied
from hydraulic pump
Control valve linkage broken
Quick disconnect coupler(s)
are not fully connected or "flow
check"
Hydraulic hose or tube line
blockage
Fill oil tank to measure
Check for twisted or clamped hydraulic hoses.
Check for damaged hose
Check and replenish hydraulic fluid.
Check and correct hydraulic hose
connections
Check for damage (kinked) hoses, etc
Check system pressure. Repair or replace
relief valve. Refer to the tractor operator's
manual
Check system pressure. Repair or replace
pump.
Inspect. Repair as required
Check coupler connections. Replace
coupler(s) if necessary
Check for evidence of damage to hoses or
tube lines that would block flow of oil
between cylinders and control valve
Cylinder piston assembly
defective (not sealing)
Control valve blockage
Check cylinders for internal leakage.
Inspect for blockage. Disassemble valve if
necessary.