Bush Hog PT5 manual Troubleshooting Guide

OPERATION

14. TROUBLESHOOTING GUIDE

HYDRAULIC CYLINDER NOT WORKING -Check level of hydraulic fluid (see sight gauge on tank). Check to see if pump is functioning properly by attempting to use another cylinder or pressure gauge. If pump is working properly, check the pressure on the line. The relief valve may be bypassing fluid at too low pressures. If cylinder is still not functioning properly, check line for stoppage. The pistons in hydraulic cylinders are virtually trouble-free, but occasionally one will have a scored wall and allow oil to flow around the piston. In this case, replace the cylinder.

NOTE: Refer to repair parts section on valve bank settings on individual relief cartridges.

HYDRAULIC MOTOR NOT WORKING - Check lines for kinks or pinched place. If the motor is “bogging down” under load, recheck the valve setting on the cutter valve- 2500 PSI.

HYDRAULIC VALVE - Failures in the hydraulic system are almost always caused by other elements in the system other than the valve; so the entire system should be checked before the valve is changed. A malfunction in any hydraulic valve section will require replacement of that section (but not the replacement of the valve bank) since the insides are honed to fit individually. Attachments such as the relief valves and detent may be serviced individually.

STRUCTURAL MEMBERS - Failure in structural members generally results from rough treatment. While they are constructed to withstand abuse, they cannot be made strong enough to withstand abnormal abuse. The factory does not warrant these parts to any extent other than in normal use in grass, weeds, brush, small bushes, and small trees which the unit is designed to cut.

PT5 09/10 Operation Section 4-35

© 2010 Alamo Group Inc.

OPERATION