Operator
’s Manual Backhoe Series BH
- Page 57 of 91 -
Version 2.0
7.8
General Troubleshooting
This section can help the operator when a problem arises. It gives basic guidelines if something on
the Backhoe is not working correctly. If the procedures in this section do not solve the problem,
the owner should contact the Victory Service department for assistance.
Problem:
Cause:
Solution:
The machine fails to
operate when started
initially.
•
Low oil supply in reservoir.
•
Fill to the proper level.
•
No oil supply to the machine.
•
Oil is not diverted from the prime mover hydraulic
system. Be sure that the proper controls are actuated
on the prime mover.
•
The pump is not running.
•
Check the pump drive to be sure it is engaged.
•
Improper hose connection.
•
IMPORTANT: Be sure inlet and return hoses are
hooked up correctly. Improper hook-up will result in
damage to the Backhoe valve.
•
Excessive back pressure.
•
Relief condition. Maybe restriction from outlet to
reservoir.
•
Relief valve setting in
backhoe control valve too
low or defective.
•
Check the relief pressure valve and make
corrections. The Backhoe system pressure is 2100
psi. The relief valve may need cleaning and
overhauling or replace the entire cartridge.
See important instruction § 7.8.1.
Machine loses power
after operating
satisfactorily initially.
•
Low oil supply in reservoir.
•
Fill to the proper level.
•
Loose oil line connections,
leaks in line, or broken pipes.
•
Tighten all hose connections and replace damaged
O-ring at leaking O-ring fittings. Check and replace
any damaged hoses and lines.
•
Oil bypasses the cylinder
piston.
•
Scored piston, worn piston packing, or defective
piston assembly; replace or rebuild the cylinder;
replace damaged parts.
•
Diverter valve on prime
mover leaking externally or
bypassing oil internally
through the valve to the
reservoir.
•
The diverter valve may need rebuilding or replacing.
•
Excessive back pressure.
•
Relief condition. Maybe restriction from outlet to
reservoir.
•
Relief valve setting in
backhoe control valve too
low or defective.
•
Problems involving the
control valve proper:
•
Check the relief pressure and make corrections. The
Backhoe system pressure is 2100 psi. The relief
valve needs cleaning and overhauling or replace the
entire cartridge.
•
See important instruction § 7.8.1.
Loss of power in lift or
crowd cylinder, but other
cylinders function
correctly.
•
The spool is not moved to
the whole stroke.
•
Check the travel: 5/16" either way or a total of 5/8".
See important instruction § 7.8.1.
•
Overload relief valve in the
control valve stuck open or
malfunctioning.
•
Clean the relief valve carefully but do not disturb its
pressure setting as it cannot be field calibrated; or
replace cartridge. See item See instruction § 7.8.1.
•
Problems involving the
control valve proper:
•
See important instruction § 7.8.1.
Summary of Contents for BACKHOE BH6
Page 1: ...Operator s Manual BACKHOE SERIES BH6 BH7 BH8 VERSION 2 0 EN 2022...
Page 6: ...Operator s Manual Backhoe Series BH Page 6 of 91 Version 2 0...
Page 89: ...Operator s Manual Backhoe Series BH Page 89 of 91 Version 2 0 Excavation Specifications BH6...
Page 90: ...Operator s Manual Backhoe Series BH Page 90 of 91 Version 2 0 Excavation Specifications BH7...
Page 91: ...Operator s Manual Backhoe Series BH Page 91 of 91 Version 2 0 Excavation Specifications BH8...
