E-Z DRILL 20 UTL Guide

MAINTENANCE FOR THE
MODEL 20 UTL

SAFETY PRECAUTIONS FOR THE
MODEL 20 UTL
System Under Pressure: Shut off air supply and disconnect air
hose before disassembling or disconnecting parts.
Flying Debris: During boring, chips may be ejected. Stay behind
control panel and wear safety glasses to prevent eye injury.
Pinch Points: Keep hand clear of carriage assembly. Hands or
fingers caught between carriage and frame may be seriously injured.
Moving Parts: When moving drill unit, use carriage lock to
prevent assembly from sliding onto hands or fingers.
Heavy Load: Use handles to reposition the drill unit. Weight of
the drill unit may cause back strain if improperly lifted.

SAFETY PRECAUTIONS FOR THE
MODEL 20 UTL (continued)
Loud Noise: Wear ear protection to prevent eardrum damage
from air compressor.
Dust: Wear a dust protection mask to protect from concrete dust.
High Pressure: High pressure from the air compressor can
damage the drill, and can void the warranty.
Lifting The Drill Unit: when using a lifting device to pick up the
drill unit, use a strap or chain which is rated for the proper weight,
and attach to the lifting bale on the drill unit. Be sure carriage lock is
in place.

MAINTENANCE FOR THE
20 UTL
• Check bolts daily for tightness.
Due to the extreme amount of
vibration, bolts will loosen. It is
important keep nuts and bolts
tight.
EXCEPTION: The two bolts that
connect the front of the upper drill
bracket and the lower drill bracket
can be too tight. There should be
a gap between the two brackets.
When tightening these bolts, put a
drill bit in the chuck and turn it as
you tighten the nuts. At some
point, it will “catch” or “drag” while
turning the bit. This means the
bracket is too tight. Loosen the
nuts until you can turn the bit
freely, the tighten the lock nuts.

MAINTENANCE FOR THE
MODEL 20 UTL
• Check all nuts and bolts
around the carriage assembly
daily, and especially the stop
rods. Tighten as needed.
•Allowing bolts or connections
to work loose may disqualify
any warranty on these parts.

MAINTENANCE FOR THE
MODEL 20 UTL
DO NOT REMOVE CAP
UNDER PRESSURE !
(to remove pressure from system, have air supply
disconnected from drill unit, and open the power
switch to the “On” position)
• Fill the oil reservoir approximately
every four hours with the
recommended rock drill oil (do not
use oil that is too light, such as
Marvel Mystery Oil, automatic
transmission fluid, air tool oil, etc.).
Running the oil reservoir dry can
cause damage the drill motor.
• (See “Recommended Specifications
for Rock Drill Lubricant”)

RECOMMENDED SPECIFICATIONS FOR ROCK DRILL
LUBRICANT
The use of synthetic oils is NOT RECOMMENDED due to possible damage to seals, “O” rings, hoses, blades, and polycarbonate oiler/filter bowls. Use
only a non-detergent, Class 2, pneumatic lubricating oil (viscosity 100-200 S.S.U. @ 100° F and minimum aniline point of 200°F); which contains no
synthetic additives; and which is compatible with Buna-N, Neoprene, Urethane, Silicone, and Hytrel components.
Consistency shall be such that the oil will adhere readily to metallic surfaces under extreme pressure conditions that exist in a rock drill.
Flash, Cleveland open cup…………………………………………………………..380°F Min. (a)
Carbon Residue………………………………………………………………………0-30% Max.
Viscosity at Atmospheric Temperature
Below 20°F………………………………………………………………… SAE #10
20° to 40°F………………………………………………………………… SAE #20
40° to 80°F………………………………………………………………… SAE #30
80° to 110°F……………………………………………………………….. SAE #40
Above 100°F………………………………………………………………. SAE #50
Mineral Activity……………………………………………………………………… None
Free Fatty Acid (as Oleic %)……………………………………………………… 0.40% Max.
ASTM Steam Emulsion No……………………………………………………….. 600 Max. (b)
Metallic Soaps……………………………………………………………………… None
Pour Point F………………………………………………………………………… +10 Max. (c)
Film Strength PSI
Almen Test……………………………………………………………….. 12,000 (d)
Weeks Test………………………………………………………………. 8,000 (d)
(a) Where lower than normal viscosity oil is used at extreme low temperature, 350°F flash point permissible.
(b) 1200+ desired where moisture is a major factor. Operator must compensate for foaming when filling the lubricator.
(c) For below normal atmospheric temperature operation, lower pour test product may be required.
(d) Desired values, not minimum. Rock drill oils must have appreciably greater load carrying ability than straight mineral oils of like viscosity. High film
strength is required by the heavy rotational loads present in drilling conditions. Additives which impart extreme pressure characteristics to the oil must
be non-corrosive to the drill mechanism.

MAINTENANCE FOR THE
MODEL 20 UTL
• Grease both the transport
wheels and the small wheels
on the handle bar periodically

MAINTENANCE FOR THE
MODEL 20 UTL
• The transport wheels are foam
filled, and should never need
inflating.
• NOTE: Older models did have
inflatable tires. Check your
machine to see which type is
on your machine.

MAINTENANCE FOR THE
MODEL 20 UTL
• It is highly recommended that the concrete dust on the drill unit be
cleaned off daily to prevent it from getting wet and hardening.
• For longer storage periods, flush the drill motor with a substance
that will prevent rust from forming due to moisture in the drill. Any
amount of rust can cause the cycling valve to seize. If this happens,
the drill motor generally has to be taken apart and cleaned
thoroughly before it will operate. Substances such rock drill oil,
Marvel Mystery Oil, or even diesel fuel can be used to flush the drill
motors.