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HYDRAULIC TROUBLE SHOOTING GUIDE
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Probable Cause{s)
Corrective Action
Problem
Cylinder rod will not
move
Slow cylinder shaft
speed while
extending and
retracting
Engine runs but
wood will not split,
or wood splits too
slowly
A Brokendriveshaft
B Looseshaftcoupling
C Gear sectionsdamaged
D Damaged reliefvalve
E Hydrauliclinesblocked
F Too littleoil to pump
G Damaged directional v alve
H Blockeddirectionalvalve
A Gear sectionsdamaged
B Excessivepump inletvacuum
C
D
E
F
G
H
Slow engine speed
Damaged reliefvalve
Toolittleoilto pump
Air in oil
Directionalvalveleaking internally
Internallydamagedcylinder
A Small gear section damaged
B Pump check valve leaking
C Excessive pump inlet vacuum
D Low relief valve setting
E Too little oil to pump
F Air in oil
G Directionalvalveleaking internally
H Overloadedcylinder
I Internallydamaged cylinder
A Return pumpfor authorizedrepair
B Correct engine/pumpalignment as necessary
C Return pumpfor authorizedrepair
D Return directional v alvefor authorizedrepair
E Flushand clean hydraulic system
F Add oilto reservoir
G Return directional v alvefor authorizedrepair
H Flush and clean hydraulic system;return
directionalvalvefor authorizedrepair
A Return pump for authorized repair
B Make certain pump inlet hoses are clear
and unblocked---use
short, large
diameter inlet hoses
C Return engine for authorized repair
D Return directional valve for authorized repair
E Add oil to reservoir
F Add oil, clean reservoir, make certain oil
return tube is below oil level
G Return directional valve for authorized repair
H Return cylinder for authorized repair
A Returnpumpfor authorizedrepair
B Returnpumpfor authorizedrepair
C Make certainpumpinlethosesare
clear and unblocked; u se short, large
diameterinlethoses
D Adjustvalve while usingpressuregauge*
E Add oilto reservoir
F Add oil, clean reservoir, m ake certainoi! ....
returntube is belowoil level
G Return directional v alvefor authorizedrepair
H Do not attemptto splitwoodagainstthe grain
I
Returncylinderfor authorizedrepair
Engine stallsduring
A Low horsepower/weakengine
A Return enginefor authorizedrepair
splitting
B Overloaded cylinder
B Do notattemptto splitwoodagainstthe grain
A Engine/pump misalignment
B Frozen or seized pump
C Low horsepower/weak
engine
D Hydraulic lines blocked
E Blocked directional valve
Engine willnotturn
or stallsunderlow
loadconditions
Leakingpump shaft
seal
A Brokendriveshaft
B Engine/pump misalignment
C Gear sectionsdamaged
D Poorlypositionedshaftseal
E Pluggedoil breather
A Correct alignmentas necessary
B Return pumpfor authorized repair
C Return enginefor authorizedrepair
D Flushand clean hydraulic system
E Flushand clean hydraulic system;return
directional v alvefor authorizedrepair
A Return pumpfor authorizedrepair
B Correctalignmentas necessary
C Returnpumpfor authorized repair
D Return pumpfor authorizedrepair
E Make certainreservoiris properlyvented
*Should be performed by an authorized service dealeronly.
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