Stanley Black & Decker HG60 user manual Troubleshooting, Problem Cause Solution

Page 13

TROUBLESHOOTING

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.

When diagnosing faults in operation of the grinder, always check that the hydraulic power source is supplying the correct hydraulic flow and pressure to the grinder as listed in the table. Use a flowmeter known to be accurate. Check the flow with the hydraulic oil temperature at least 80 °F/27 °C.

Problem

Cause

Solution

Grinder does not run.

Hydraulic power source not

Check power source for proper flow

 

functioning.

and pressure (7–10 gpm/26–38 lpm @

 

 

1500–2000 psi/105–140 bar.

 

Couplers or hoses blocked.

Locate and remove restriction.

 

Hydraulic motor failure.

Inspect and repair.

 

Hydraulic lines not connected.

Connect lines.

Grinder operates too slow.

Hydraulic motor speed to slow.

Check power unit for proper flow (7–10

 

 

gpm/26–38 lpm).

 

High back-pressure.

Check hydraulic system for excessive

 

 

back-pressure (over 250 psi/17 bar).

 

Couplers or hoses blocked.

Locate and remove restriction.

 

Oil too hot (above 140 °F/60 °C)

Check hydraulic power source for

 

or too cold (below 60 °F/16 °C).

proper oil temperature. Bypass

 

 

cooler to warm oil or provide cooler to

 

 

maintain proper temperature.

 

Relief valve set too low.

Adjust relief valve to 2200–2300

 

 

psi/152–159 bar.

 

Hydraulic motor worn.

Inspect, repair or replace.

 

Flow control malfunctioning.

Have flow control serviced at an

 

 

authorized Stanley service center.

Grinder operates too fast.

Flow control malfunctioning.

Have flow control and valve body

 

 

serviced at an authorized Stanley

 

 

service center.

Spindle rotates in the wrong

Hydraulic flow is in the wrong

Connect the pressure line to the

direction.

direction.

grinder port marked IN. Connect the

 

 

return line to the grinder port marked

 

 

OUT.

HG60 User Manual ◄ 13

Image 13
Contents Hydraulic Bull Nose Grinder Page Table of Contents Local Safety Regulations Safety SymbolsSafety Precautions Grinding Wheel Safety Tool Stickers & Tags Protect Your Eyes Wear Safety GogglesHose Types Hose Safety TagsTool to Hydraulic Circuit Hose Recommendations Hose RecommendationsHtma / Ehtma Requirements Htma / Ehtma RequirementsOperating Procedures PRE-OPERATION ProceduresOperation Cold Weather OperationTool Protection & Care Problem Cause Solution TroubleshootingSpecifications AccessoriesHG60 Parts Illustration Part QTY Description HG60 Parts List