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GR30 User Manual ◄ 11
PRE-OPERATION PROCEDURES
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 efcient and reliable service.
GRINDING WHEEL REPLACEMENT
Always disconnect the hydraulic power source from the
grinder before replacing the grinding wheel.
TOOLS, PARTS, AND MATERIALS
• Open-end or spanner wrenches (two sizes 5/8 in.
and 1in.)
• Grinding wheel (refer to the Specications section)
• Depressed-center wheel adapter, if required (refer
to Parts List)
1.
WARNING
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 rst 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 ats 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 specica-
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.
IMPORTANT
Never over-tighten the grinding wheel jam nut by
impacting either wrench with a mallet or hammer.
Sufcient 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 ats of the
output shaft and the other on the jam nut.
HYDRAULIC HOSE CONNECTION
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-
gether when not in use. The pressure increase in
uncoupled hoses left in the sun may make them dif-
cult to connect.
IMPORTANT
Never use a chipped, damaged, or worn grinding
wheel.
WARNING
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.
OPERATION