Barko Hydraulics 495B SD - Page 97

Operation and Maintenance Manual
495B ML TM (S)
97
Last Updated - 08/31/2016
REMEDY
HYDRAULIC SYSTEM
PROBLEM
CAUSE
Pump or motor too noisy. Low hydraulic oil supply or wrong
viscosity.
Air in hydraulic oil.
Fill hydraulic reservoir with proper
oil.
Check for foamy oil. Tighten
connections, replace o-rings or
lines.
Hydraulic oil overheats. Replaceltersandhydraulicoil.
Fill hydraulic reservoir to proper
level.
Inspectandcleancoolerns.
Adjusttospecications.
Replace oil with proper viscosity.
Reduce load.
Nooworpressure.
Hydraulic oil dirty or low supply.
Oil cooler dirty.
Relief valve improperly adjusted.
Incorrect hydraulic oil viscosity.
Excessive load.
Pump not receiving hydraulic oil.
Damaged line.
Any or all of the following:
 -Replacedirtylters.
- Clogged inlet line.
- Clean reservoir breather
vent.
- Fill reservoir to proper level.
Replace line.
Hydraulic system pressure too
low.
External leak in system. Tighten connections and bleed air
from system.
Hydraulic pressure erratic.
Air in hydraulic oil.
Contamination in hydraulic oil.
Tightenconnections,llreservoir
to proper level, and bleed air from
system.
Replacedirtylterandsystem
hydraulic oil.
Slow hydraulic functions.
Hydraulic oil viscosity too high.
Low hydraulic oil supply.
Obstruction in line or line
damaged.
Hydraulic oil may be too cold or
should be replaced with proper
viscosity.
Fill hydraulic reservoir with proper
hydraulic oil.
Inspect lines. Replace parts if
necessary.