Stanley Black & Decker GR30 Manuel D’Utilisation

The GR30 Hydraulic Grinder Requires minimum setup 

for operation. When the installation and operation in-

structions are carefully followed, the tool will provide 

years of efficient and reliable service.

Always disconnect the hydraulic power source from the 

grinder before replacing the grinding wheel.

•  Open-end or spanner wrenches (two sizes 5/8 in. 

and 1in.)

•  Grinding wheel (refer to the Specifications section)
•  Depressed-center wheel adapter, if required (refer 

to Parts List)

1. 

Inspecting the tool or installing parts with the 

hydraulic hoses connected can result in severe 

personal injury or equipment damage.

To prevent accidental start-up, disconnect the 

hydraulic power before beginning any inspection or 

installation task.

If the hydraulic hoses are connected to the tool:
a.  Turn the hydraulic system control valve OFF.
b.  Disconnect  first  the  hydraulic  input  (supply) 

hose, then the output (return) hose.

2.  Remove the old grinding wheel, if any:

a.  Place a 5/8 in. open-end wrench on the flats of 

the output shaft.

b.  Remove the jam nut from the output shaft.
c.  Unscrew the old grinding wheel.

3.  Clean the surfaces of the tool to remove any dirt or 

grease.

4.  Check the grinding wheel:

a.  Make sure the correct wheel is selected for the 

job. The wheel must conform to the specifica-

tions listed in this manual.

b.  Make sure the wheel is free of dirt and other 

foreign particles, especially the surfaces that 

contact the tool and jam nut.

c.  Check the wheel for damage or wear.

5.  If the wheel does not include an integral thread, use 

a depressed-center wheel adapter in the hole on the 

wheel.

6. 

Never over-tighten the grinding wheel jam nut by 

impacting either wrench with a mallet or hammer. 

Sufficient torque is attained by hand tightening the 

nut with two open-end wrenches.

Install the grinding wheel:
a.  Thread the grinding wheel or adapter on the 

shaft and tighten using appropriate wrenches.

b.  Screw the jam nut on the output shaft.
c.  Tighten the nut securely using two open-end 

wrenches. Place one wrench on the flats of the 

output shaft and the other on the jam nut.

Proper installation of the hydraulic hoses is extremely 

important for safe, reliable operation of the tool. Make 

sure the hoses are securely attached to the tool before 

turning on the hydraulic power.
NOTE: 
If possible, connect the free ends of the hoses to-

Never use a chipped, damaged, or worn grinding 

wheel.

Connecting hydraulic hoses to the tool while the 

hydraulic power source in ON can cause personal 

injury or damage to the equipment.

Make sure the hydraulic power source is OFF before 

connecting or disconnecting the hydraulic hoses.