37SG OWNER’S MANUAL 9/05/19 Page 17 of 19
STUMP GRINDER TROUBLESHOOTING GUIDE (continued)
D. Tracks fail to turn, but cutter rotates.
1.
Sprocket key sheared.
2.
Pump control linkage loose.
Replace key and other parts as needed.
Tighten or replace bolts.
E. Hydraulic fluid leaks in hydraulic system.
1.
Fittings are loose.
2.
Worn or broken hoses.
3.
Hydraulic fluid around cutter motor or
shaft.
Tighten fittings on hoses and adapters.
Replace damaged hoses.
Inspect motor for leaking shaft seal. Rebuild or
replace motor. New motors are available from
Barreto Manufacturing.
F. Foaming hydraulic fluid coming from breather hose.
1.
Improper fluid used.
2.
Air leaking into fluid.
Verify that hydraulic fluid used had
antifoaming additives. Tractor transmission /
hydraulic fluid ISO 68 is recommended for use
in temperatures above +32°F.
Inspect and tighten fittings and clamps on
pump intake hoses.
G. Cutter does not lift.
1.
Lift relief valve malfunctioning.
2.
Lift cylinder piston seal damaged or rod
bent.
Adjust relief to 1000 PSI. This may require a
replacement spring in valve.
Disassemble & replace parts as required.
