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9.0 Pressurizing/Depressurizing the Airgun:
EXPLOSION DANGER. USE ONLY COMPRESSED AIR OR N
2
IN THIS AIRGUN. USE OF OTHER GASSES,
INCLUDING OXYGEN, CAN CAUSE A FIRE OR EXPLOSION MAY RESULT IN SERIOUS INJURY OR DEATH.
DO NOT DISCONNECT THE FILL HOSE BEFORE FIRST BLEEDING THE AIR. FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY CAUSE THE HOSE TO WHIP FROM PRESSURE BUILT UP IN THE FILL HOSE AND MAY RESULT IN SERIOUS
INJURY OR DEATH.
NOTE: Use clean, dry, compressed air or compressed Nitrogen ONLY.
NOTE: Refer to the owner’s manual provided with your lling equipment for Proper use of the
lling equipment.
9.1 Pressurizing the Airgun;
Your new air rie is unique because it operates on compressed air
or N
2
(Nitrogen). This owner’s manual describes operating the air
rie with compressed air and N
2
only.
1. Make sure the air rie is “UNLOADED,” “ON SAFE” and
pointed in a SAFE DIRECTION.
NOTE: If lling the airgun from 0 psi, then it will be necessary to
cock the airgun to remove the force of the Hammer against the
ring Valve. Otherwise, the air will pass through the ring Valve and
out the barrel, and the airgun will not pressurize. Refer to Section
6.1, “Cocking the Airgun,” for instruction.
2. Remove the Fill Nipple Cover by applying pressure to the
front tab with your ngertip.
3. Rotate the Cover away from the airgun. Lift and move the
cover forward to allow the retaining tab to exit the gun
stock. Stow for replacement later.
4. Lay the air rie on the left side so the on-board gauge is
facing up.
5. Attach the quick disconnect tting from your lling
equipment to the ll nipple on the airgun (See Fig. 9A).
6. Fill the air rie slowly to eliminate heat buildup and
chance for overlling. If the airgun is overlled, past 3000
psi (207 bar), refer to section 9.2 for Depressurizing.
7. Replace the Fill Nipple Cover in the reverse order of removal.
9.2 Depressurizing the Airgun;
NOTE:
Depressurizing the airgun will create a noticeable noise as a small volume of air expels from the barrel
when the pressure in the Reservoir drops to the point where the Hammer will force the ring Valve open.
1. Make sure the air rie is “UNLOADED,” “ON SAFE” and pointed in a SAFE DIRECTION.
2. Remove the Fill Nipple Cover by applying pressure to the front tab with a ngertip.
3. Rotate the Cover away from the air rie. Lift and move the Cover forward to allow the retaining tab
to exit the gun stock. Stow for replacement later.
4. Locate the pressure relief screw located forward of the Fill Nipple and beneath the stock outer wall
(See Fig. 9B).
5. Using a 3/32” Allen Wrench, loosen the pressure relief screw by rotating counter-clockwise for a
maximum of 3 full turns.
6. Watch the pressure gauge and listen as the air is expelled past the pressure relief screw until the
desired pressure is achieved. Then tighten the pressure relief screw rmly.
7. Replace the Fill Nipple Cover in the reverse order.
10.0 Trigger:
The Trigger of your Bulldog airgun is a 2 stage unit. The purpose of a 2 stage trigger is to provide feedback
to the shooter when pulling the trigger up to the point just before the trigger breaks and the airgun res.
This provides for a very controlled release of the trigger. The trigger is factory set for safe and reliable use. No
maintenance should be required. The trigger is designed to have approximate pull weights of 2 lbs on the 1st
stage and break at 3 lbs on the 2nd stage.
1. While pointed at a SAFE DIRECTION, pull the trigger slowly until a solid resistance is felt. This is the
1st stage of the trigger and is sometimes referred to as “take-up”’. This is also the point at which the
2nd stage begins. Any additional pull of the trigger beyond this point WILL re the airgun.
2. While holding the trigger against the 2nd stage, adjust your aim on the target and, when ready to
re, pull the trigger the nal portion through the 2nd stage. This WILL re the air rie.
NOTE: While holding the trigger against the 2nd stage, if the shooter decides NOT to re the airgun, the
Fig. 9A
3/32” Allen Wrench
Fig. 9B
trigger can be released and the trigger will reset to the original position.
11.0 Sight Options:
Your air rie is best suited for use with magnifying scopes for best shot placement and most humane taking
of intended game. Use of 37mm tall (absolute co-witness) rings, widely used with the AR platform, are
recommended. Other “iron sight” or “open sight” options suited for use on the AR platform will also work on
the Bulldog airgun. Use of other accessories, IE Laser Sights, Red Dot Sights, Flashlights, are all acceptable as
long as they are suited for the Picatinny rail standard.
12.0 Misfeed:
A misfeed can occur when the air rie is not fully cocked. This means the bolt was pulled back far enough to
allow the magazine cylinder to rotate and the side lever was pushed forward loading a bullet/pellet, but the
hammer was never cocked. The result is no shot being red when the trigger is pulled. If this occurs perform
the following.
1. Make sure the air rie is “ON SAFE” and pointed in a SAFE DIRECTION.
2. Cock the air rife (see Section 6.1). Remember to fully pull the side cocking lever until it stops. This will
to cock the Hammer.
3. Leave the cocking lever in the Open position.
4. Remove the Rotary Magazine.
5. Close the cocking side lever action without the Magazine in place. REMEMBER, there is already a bul-
let/pellet loaded into the chamber of the airgun so KEEP the air rie pointed in a SAFE DIRECTION.
6. Take the air rie “OFF SAFE” and shoot the chambered bullet in a SAFE DIRECTION.
7. Put the air rie “ON SAFE.”
13.0 Maintenance:
EXPLOSION DANGER. KEEP ALL PETROLEUM-BASED LUBRICANTS AWAY FROM FILL NIPPLE. DO NOT
INTRODUCE PETROLEUM BASED PRODUCTS INTO THE HIGH PRESSURE RESERVOIR, OR IT MAY CAUSE AN EXPLOSION. FAILURE
TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS INJURY OR DEATH.
NOTE: Store this airgun charged with air to keep the valves closed
against dirt.
The Benjamin Bulldog airgun requires minimal maintenance.
However, there are several areas where periodic lubrication is
recommended depending on frequency of use.
1. Using a cotton swap lubricate the breech o-ring and bolt
tip as shown in Figure 13A. Crosman RMCOIL is recom-
mended for this application. Perform this procedure at
approximately 100 shot intervals.
2. Using a cotton swab apply a graphite moly grease to the
bore surfaces of the receiver where the bolt mechanism
slides as shown in Figure 13B. CRC Industries Moly-Graph
is a suitable grease for this application. Perform this
procedure at approximately 200 shot intervals. Removal
of the rubber ller in the cheek piece is recommended to
gain access to the surfaces requiring lubrication.
3. Periodic lubrication of the barrel is highly recommended
to eliminate lead fouling. Lead fouling can negatively
impact accuracy of the shot and require more aggressive
cleaning techniques. Always use soft cotton patches or
foam applicators and a cleaning rod that cannot damage
the barrel when performing this procedure.
13.1 Barrel Cleaning Instructions
Your Bulldog airgun includes a cleaning rod and Bore-tips® foam swabs. Use the Bore-tips as described on the
Bore-tips package inserting the tip from the muzzle end of the airgun. As stated on the Bore-tips package, the
foam swabs are re-usable and can be cleaned by simply tamping with a clean paper towel or more thoroughly
using cleaners like Simple Green. Also included in your Bulldog kit is a sample size packet of Crosman Pellgun
Oil. This may be used to lube the barrel of the Bulldog airgun. As accuracy can be negatively aected by over
lubricating the barrel it is important to adopt a regimen that works for you. Generally speaking, a light lube
periodically and a follow-up with a dry swab will provide good consistent accuracy.
1. Always make sure the airgun is unloaded and safe prior to cleaning. Refer to Section 7.2, “Unloading
the Airgun” in your owner’s manual for instructions
2. De-pressurize your airgun prior to cleaning the barrel. Refer to Section 9.2 “Depressurizing the
Airgun” in your owner’s manual for instructions.
Fig. 13A
Fig. 13B