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DS11 User Manual ◄ 19
PROBLEM CAUSE REMEDY
Excessive vibration and cuts rough. Loose chain tension. Retension the chain.
Excessive feed force. Reduce feed force.
Chain saw will not cut straight. Operator feed force not applied
directly over centerline of saw.
Accumulated saw bar wear and
uneven chain segment prole wear.
Move left hand closer to centerline of saw
bar.
Turn the saw bar over and dress rails
square. Replace the saw bar and chain.
Loss of power. Drive sprocket slipping on
Trantorque® adapter.
Adjust and tighten Trantorque® adapter,
(35 ft lbs/47 Nm).
Chain saw does not run. Power source not functioning. Check power source for proper ow and
pressure (7–9 gpm/26–34 lpm @ 2000
psi/140 bar).
Coupler or hoses are blocked. Remove obstruction.
Mechanical failure. Disassemble the chain saw and inspect for
damage.
Chain saw runs backwards. Pressure and return hoses reversed. Connect for proper ow direction. Motor
shaft must rotate clockwise.
Trigger is hard to press. Pressure and return hoses reversed. Connect to proper ow direction. Motor
shaft must rotate clockwise.
Back pressure too high. Should not exceed 250 psi/17 bar @ 9
gpm/34 lpm measured at the end of the
chain saw’s operating hoses.
Fluid leakage around drive sprocket. Motor shaft seal failure. Replace as required.
Fluid leakage between the rear gear
housing and the chain saw adaptor.
Motor face seal failure. Replace as required.
Fluid leakage between the valve
handle and the extension housing.
Oil tube seal failure. Replace as required.
Fluid leakage between the extension
housing assembly and the chain saw
adaptor.
Oil tube seal failure. Replace as required.
Chain saw cuts slow. Insufcient hydraulic uid ow or low
relief valve setting.
Adjust proper hydraulic uid ow to proper
gpm. For optimum performance, adjust
relief valve to 2100–2250 psi/145–155 bar.
Back pressure too high. Should not exceed 250 psi/17 bar @ 9
gpm/34 lpm measured at the end of the
chain saw’s operating hoses.
Loss of diamond segment side
clearance.
Replace the chain.
Hydraulic uid mixed in water supply. Check motor for leaks.
Chain segment dulled because of
continuous use in hard material or
rebar.
Redress segment by cutting in abrasive
material (i.e., concrete, build-block, etc.).
NOTE: This indicates that the wrong
chain is being used.
Wrong chain for application. Scale down to a lower numbered chain.
Wire edged bar rails. Dress rails square.
Excessive vibration and cuts rough. Segment(s) broken or missing from
chain.
Remove and repair broken segment or
replace chain.
TROUBLESHOOTING