Diamond Products UDM - Manual (Page 16)

Drill Motor Pressure Switch
An adjustable pressure switch monitors the drill
motor pressure and will automatically shift the
cylinder to neutral (stops pushing) if it senses
the drill motor pressure rises above 1500 psi
(hard spots). The cylinder will then
automatically cycle ON/OFF as the drill works
through rebar or other hard spots.
Raising and Lowering the Drill
The DRILL DOWN, DRILL UP, and TURBO switches
are intermittent switches and must be held to
operate. Holding UP or DOWN and TURBO will
raise and lower the drill more rapidly for initial
positioning and quickly pulling a bit out of a
hole. These switches will not work when the
AUTO DRILL mode is selected.
Raising and Lowering Frame and Mast
To establish a more solid base, the pneumatic
tires are raised off the ground. This same action
places the vacuum base firmly on the ground.
Electric cylinders at the front and rear of the
machine are controlled by intermittent
switches located on the main side control
panel. The frame should be raised until the
front tires are just clear of the ground.
Independently adjusting the front and rear
controls allows slight leveling of the machine.
• DO NOT exceed the core bit’s
maximum recommended
speed when drilling. Excessive
drilling speeds at first contact
with the concrete surface can
cause bit breakage, resulting in serious
injuries and/or death.
• DO NOT use damaged core bits when
drilling to avoid harming yourself, others, or
the machine.
Diamond Core Bits
Using the proper core bit (size and type)
preserves the bit and improves drilling and
operator efficiency, resulting in lower costs.
Refer to www.diamondproducts.com for
additional drilling and core bit information.
Inspecting the Core Bit
Inspect each core bit prior to installation and
discard all damaged bits. Inspect all core bits
for:
• Cracks, nicks, and dents on barrel
• Darkness and/or discoloration near
edge of bit
• Uneven wear
• Missing segments
• Bent segments
• Segment cracks
Core Bit Speeds
Refer to the chart on the machine for the
recommended core bit speeds when drilling.
DO NOT exceed the maximum recommended
drilling speed.
Installing a Core Bit
• Be extremely careful when
installing a core bit by hand
with the spindle shaft
activated to avoid
entanglement.
• Failure to properly secure the core bit to the
spindle shaft may cause the bit to loosen or fall
off the machine.
Cylinder Speed
Adjuster
Adjustable
Pressure Switch
13