Owner's Manual

6
EN
When refilling, use only oil- and water-free compressed air (DIN EN 12021 – breathing air) or
nitrogen with a maximum pressure of 4500 PSI (310 bar). Never expose a filled pressure reservoir to
a temperature above 122°F (50° C). Do not make alterations to the compressed air reservoir or its
valves. Observe applicable national statutory regulations for refilling. Do not refill an air reservoir that
leaks or appears unsafe. Empty it in a safe manner.
CAUTION
CHARGING YOUR AIR RIFLE
Make sure the airgun is unloaded, ON SAFE,
the field safety is engaged, it is uncocked,
has an empty magazine inserted and is
pointed in a safe direction. Remove the cap
on the air reservoir fill port and connect the
high pressure tank or bottle quick-connect
fitting to the fill port (Illustration 3b). Slowly
open the valve on the high pressure tank
or bottle and begin filling the air reservoir.
NOTE: When using a compressor or slow fill
SCBA tank on a gun free of air, expect air to
leak out until the pressure reaches around
500-1000 PSI to completely seat the seals.
This is normal and not indicative of an issue.
Continue filling until the pressure gauge on the
air reservoir indicates 4500 psi (Illustration
Optimum Fill
Pressure
Illustration 3c
NOTE: Overfilling
may result in
damage to airgun
or air cylinder
rupture
3C. FILLING THE AIR RESERVOIR WITH A HAND PUMP
NOTICE
Air will leak out of internal seals until the air reservoir pressure reaches
around 500-1000 psi. For this reason, we recommend that if you are using a hand pump, it
should be used only to top off the air reservoir when at pressures at or above 1000 psi. Do
not use a hand pump to fill the tank from 0 psi.
Make sure the airgun is unloaded, ON SAFE and pointed in a safe direction. Remove the
cap on the air reservoir fill port and connect the hand pump quick-connect fitting to the fill
port (Illustration 3b). Begin pumping. Continue until the pressure gauge on the air reservoir
indicates that you are at 4500 psi (Illustration 3c). DO NOT OVERFILL. Once desired pressure
is reached, bleed the air hose and disconnect the air hose from the reservoir. NOTE: If
the air hose is not bled before disconnecting, the hose may whip when disconnected and
could result in injury or property damage. During prolonged pumping, the pump and air
reservoir will become uncomfortably warm. Stop pumping and allow everything to cool to
room temperature before continuing. Replace the fill port cap when finished. Follow the
manufacturer’s hand pump instructions.
3B. FILLING THE AIRGUN RESERVOIR WITH A HIGH PRESSURE TANK/COMPRESSOR
Illustration 3b
CHARGING YOUR AIR RIFLE
4. DEGASSING YOUR AIR RIFLE
Muzzle velocity should remain consistent until the Umarex Hammer compressed air reservoir
pressure falls below 3,000 psi. To maintain velocity, refill the reservoir when it enters the ‘Low
Pressure’ zone on the gauge.
Check the pressure level indicator
of the compressed air reservoir only
when your air rifle is unloaded and
uncocked and when the safety is
engaged.
CAUTION
Optimum Fill
Pressure
Overfilled
Low Pressure
Illustration 3a
3c). DO NOT OVERFILL. Once desired pressure is reached, bleed the high pressure tank/
bottle hose and disconnect it from the air reservoir. NOTE: If air hose is not bled before
disconnecting, the hose may whip when disconnected and could result in injury or property
damage. Replace fill port cap when finished.