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Congratulations on your purchase of the new PULSAR D HPA Engine – it's the world's first dual solenoid valve closed-bolt ETU/FCU controlled HPA engine with optical sensors. Powered by the latest TITAN II Bluetooth® combined with HPA technology, you get absurd trigger response never before seen in airsoft. Achieve insane muzzle velocities ranging from 250 to 650 FPS and ROF from 1 to 40 RPS for CQB, assault rifles and sniper rifles. The closed-bolt system and innovative BB feed system guarantee you a stable and repeatable bullet trajectory even in AUTO mode – every time. Engine calibration has never been easier – PULSAR D with TITAN II Bluetooth® introduce an innovative automatic cycle synchronization system. The most advanced and user-friendly GCS app gives you access to numerous settings and configurations such as binary trigger, trigger sensitivity adjustment, ROF – live via Bluetooth®. You can even use remote shooting mode on your smartwatch. You now have the option to install the smallest and most advanced dual solenoid valve HPA engine in replicas where this was not previously possible due to engine size. Choose from one of the five included nozzles or use the standard AEG nozzle you have. Take your replica into the future!
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Get ready the replica where you will be installing your PULSAR D engine.
Remove the gearbox shell from the replica.
Remove all components from the gearbox.
Thoroughly clean and degrease the gearbox shell as well as the middle gear – you are going to use it in a moment.
Prepare the parts that you are going to use again when assembling the engine:
gearbox shell
trigger together with the spring
selector plate
middle gear.
Get familiar with the contents of the PULSAR D engine packaging and the contents of the manual.
Prepare the items for installation:
PULSAR D HPA engine
Air hose
TITAN II Bluetooth® V2 gearbox drop-in FCU mosfet HPA
Accessory I/O cable for connecting the second solenoid
Installation kit
Install the bottom PCB of TITAN II Bluetooth®. The distance around the bearing should be symmetrical.
Place the wires as shown in the picture. Make sure that the wires do not obstruct the pin hole, the trigger sensor, and will not interfere with the trigger.
Screw the air hose connector into the engine body above the valve. You can use a wrench or combination pliers to tighten it a little more. Place the pliers in the area marked green.
Connect the power supply cable from the lower TITAN II Bluetooth® board to the lower solenoid valve.
Connect the I/O accessory cable one end (multi-pin plug) to the top PCB of the TITAN II Bluetooth® – pay attention to the proper alignment of the plug with respect to the socket.
Bend the wires as shown in the photo.
For PULSAR D, this wire should be routed along the outer surface of the top PCB.
Install the trigger and the top PCB of TITAN II Bluetooth®. You will find the full TITAN II Bluetooth® manual here: https://help.gatee.eu/space/GHC/2873360445/User+Manual – TITAN+II+Bluetooth®+V2+gearbox+drop-in+FCU+mosfet+HPA.
Connect the other end terminated with a two-pin plug to the other – upper solenoid valve.
Position the engine in the place of the cylinder – it should be pushed against the front wall of the gearbox.
Install the middle gear and arrange the power supply cables and the air hose behind its axis as shown in the photo. This will prevent the air hose from colliding with the moving tappet plate and help organize the entire installation inside the gearbox.
The new revision of the PULSAR D engine includes a dedicated shaft that holds the power cable replacing the middle gear.
Before closing the shell, make sure that the wires do not obstruct important openings.
Close the gearbox shell and check that it closes evenly (do not tighten the screws). A slight gap before tightening is acceptable.
In a moment, you will be installing the spring guide. To stabilize it, you can use a bumper from the cylinder head - this will prevent the guide from coming off during further in the course of installation. Alternatively, you can use insulating tape by wrapping an appropriate amount around the end of the spring guide.
Open the gearbox and place the spring guide in its slot.
Close the gearbox shell and check that it closes evenly (do not tighten the screws). A slight gap before you have tightened it is acceptable.
If you have an adjustable trigger, such as the Nova Trigger, you can now adjust its movement range. This should be done before calibrating the trigger sensor.
Have the selector plate properly prepared by sticking the sticker from the installation kit labeled Selector Plate Sticker on it. Precision and accurate placement of the sticker on the plate is very important – see photo below:
Install the selector plate and other selector components if any.
Place the shell in the body of the replica.
Install the grip by previously placing the air hose through the hole where the motor gear was previously located.
Remove the adjustment screw from the motor cover.
Then place the air hose through the hole where the screw was and install the cover.
Installing the buffer tube guide
Gently tighten the guide screw so that the spring guide stays in place.
Tighten the screw of the buffer tube guide until you feel resistance.
At the end of the air hose, install the connector in the standard you will be using.
Install the upper part of the replica body including the barrel and chamber. Remember not to use a nozzle sleeve with PULSAR D.
Connect the battery and perform trigger and selector calibration using the GCS app.
Select PULSAR D from the list as the type of HPA engine used.
After each firmware update, restore the factory settings.
To reset the time settings restore the default settings. These are as follows.
Calibration of HPA Engine Control Times
PULSAR D Engine Calibration
Insert your magazine loaded with the BBs of the weight you’re going to be using.
Carry out FPS measurements using a chronograph.
If the results are stable, proceed with accuracy test – step 38.
If you encounter FPS spikes or results that are too low, then probably the gearbox has not been installed axially in the lower receiver. Go to step 39.
Aim test – if the previous FPS measurements and now the accuracy test are satisfactory, then your replica is ready. If you have encountered problems at any of the previous stages, proceed to the next point.
Axial alignment is very important when building an HPA replica. HPA engines, especially those operating in an open-bolt system, are very sensitive to deviations from alignment.
If you have specialized knowledge of replica building, you can correct the gearbox deviation from the body axis yourself. Otherwise, it is best to have a reliable service technician align the replica
Using an inspection camera with a diameter of less than 6 mm is most effective in assessing the deviation from the axis.
Insert the camera through the barrel and bring it close to the hop-up bucking.
You should then see an image similar to one of the four situations.
The deviations shown above will result in a sudden change in the trajectory of the BB in the same direction as the deviation from the axis. Example: The BBs are drifted to the left - the nozzle is moved more to the left. Solution – you need to move the front of the gearbox to the right, aiming at the centric location of the nozzle in relation to the hop-up bucking.
Right-left correction will be carried out with the help of the adjustment screws supplied with our gearbox, which should be screwed into these holes marked in the photo and with them change the position of the gearbox. You can secure these screws with thread glue or a specific number of washers. For other gearboxes that do not have such screws, you need to drill holes in the front part of the gearbox on both sides of it, thread these holes, and fasten the screws in them, which should be handled similarly to the case of the gearbox. Otherwise, if this is not an option for you, you can use spacers in the form of various materials.
You will carry out the top correction by shimming something under the gearbox in the area in front of the trigger or by collecting material from the surface in contact with the rear of the gearbox/rear of the replica body around the location of buffer tube guide.
You will make the bottom correction by shimming something on the surface in contact with the spring guide or collecting material from under the gearbox in the area in the front of the body.
In each replica, these values will vary and it may require many hours of correction to achieve perfect alignment of the replica. However, this will bring very good results in the form of stable FPS measurements and a repeatable BB trajectory, resulting in high accuracy.
If you overcome the problem and improve the axiality of your replica, it is ready for use.
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Connect to TITAN II using the GCS app by selecting “+”in the Dashboard.
Select TITAN II Bluetooth® from the list. If this is the first time you connect, you must enter the PIN code that came with the product.
After connecting TITAN II Bluetooth®to GCS, tap the TITAN its icon.
Go to the General tab.
Tap the HPA Engine tab.
Set the correct engine type – PULSAR D.
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Start calibration by restoring the default settings, which should work well in most replicas and will be a good starting point for precise calibration.
Then proceed to chrono the replica. Depending on the weight of the BBs, the length of the barrel and the hop-up bucking, use the pressure regulator to preset the desired bullet muzzle velocity.
Then decrease the Main Valve Time by 0,1 ms at a time until the FPS do not start to drop. If you notice a decrease in FPS, return to the previous time value on which there was no decrease in FPS. This means that the Main Valve Time has been calibrated correctly.
Next, go to the Main Valve Pause setting. This value depends on the length of time the BB remains in the barrel. Set this value between 0.1 and 3 ms, and check which value will give a stable muzzle velocity result for your replica.
Next, go to the Nozzle Valve Time setting, this value depends on the quality of the magazines you use. The weaker the spring in the magazine, the longer the interval will have to be. Proceed here similarly to the Main Valve Time calibration. Set the value around 25 ms, and then decrease it until you notice gaps in the magazine feeding the BBs, then return to the previous time setting. If you continue to observe problems with BB feed, you should increase this time.
The last value is the Nozzle Valve Pause Offset calibration. Nozzle Offset – is the amount of time added to the TITAN's measured time to move the nozzle to its maximum forward position to fire when the nozzle is already stabilized in the hop-up chamber. This improves focus and FPS stability. For stable operation of the replica, it is worth setting this time between 1-3 ms.
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Have all the listed items ready.
Remove the air hose.
Remove the tappet plate spring.
Unscrew the screw securing the tappet plate.
Remove the tappet plate.
Remove the nozzle.
Gently unscrew the solenoid valves – be careful with the very delicate O-rings on the valve.
Using the dedicated wrench included in the kit or Seger-type safety pliers, unscrew the nozzle guide. The first engine release may not have had them included, but they are available in our store.
Using tweezers or a screwdriver, gently remove the poppet from inside the body.
Remove the tappet plate piston (you can use tweezers or a sharp knife for this, paying attention not to damage the piston).
Remove all the O-rings from the engine components except the solenoid valve (it is best to use plastic tools for this so as not to damage the aluminum surfaces of the engine – this is not covered by the warranty).
If the o-rings are not damaged, you can reuse them after cleaning them with a paper towel – it is best to avoid washing the o-rings with detergents.
If the o-rings are damaged or show signs of wear, replace them with new ones – included in the kit.
Place the engine components in a dish with petroleum ether (NOTE – does not apply to the solenoid valves. Avoid immersing them in cleaning agents).
Using a thicker brush and tweezers, thoroughly clean the engine components.
For solenoid valves, gently wipe the O-ring surfaces and remove visible dirt with a dry brush.
Set the washed parts aside on a paper towel to dry completely (you can speed up the process by blowing the parts with compressed air).
Reinstall the o-rings (you can lightly grease them before installation):
Install the o-rings according to the diagram below:
1 o-ring 16x1.5 mm and 1 o-ring 6x1 mm in the nozzle guide.
2 o-rings 8x1 mm for the poppet.
1 o-ring 4x1 mm for the tappet plate piston.
Prepare all parts with the O-rings installed, as well as grease and a smaller brush.
grease two places in the rear of the engine body:
The cylinder where the piston moves (take care not to grease the bottom of the cylinder).
Then the vertical surfaces of the cylinder where the poppet moves. Try not to grease the bottom of the cylinder. This can have a negative effect on engine performance.
Grease the o-ring on the piston and the piston.
Place the piston in its cylinder and collect excess grease.
Grease well the two o-rings in the nozzle guide (you can remove the excess with a paper towel).
In the poppet, also grease two places:
Both O-rings. As with the rear of the engine, be careful not to leave grease on the flat rear surface of the nozzle.
And the narrowed poppet surface.
Place the greased poppet in the inner part of the nozzle guide.
Then screw the nozzle guide into the engine body using a wrench or the aforementioned pliers.
Grease the nozzle guide.
Grease the nozzle from the inside in the o-ring area.
Install the nozzle on the guide.
Gently grease the thread and O-rings of the valve with a flat brush. Avoid getting grease into the moving parts of the valve.
Gently, while taking care of the solenoid valve's o-rings, screw it into the valve socket. Just do it with your bare hand, do not use tools for this.
Grease the surface over which the tappet plate moves.
Install the tappet plate. Press it well against the nozzle.
Secure the tappet plate with the screw. Tighten the screw until you feel resistance in the operation of the tappet plate and then loosen the screw so that the tappet plate can move freely and without resistance.
Install the tappet plate spring.
Screw on the air hose.
The engine is once again ready for use.
Repair Kit
Use the repair kit if any of the o-rings are damaged/worn.
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User Manual – TITAN II Bluetooth® EXPERT for V2 GB [HPA]
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Technical Specifications
The design and production of the device is based on harmonized standards.
Solenoid Voltage Range | 5-8.4 V |
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Operating Pressure | 60-140 PSI |
– high pressure only | |
Gas Consumption | For 90 PSI and |
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48 ci/0 |
,8 l 300 bar/4500 PSI |
tank – 0.7 PSI per shot |
Dimensions (Length x Diameter x Height) |
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102 mm x 25.4 mm x 38.5 mm |
Finished Product Weight |
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90 g | |
Operating Temperature Range | min. -15° C, max. +50° C |
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Relative Humidity | ≤ 80% |
Legal Notice
Please read the Legal Notice before operating your device and keep it for future reference. This document contains important terms and conditions with respect to your device. By using this device, you accept these terms and conditions.
Exclusion of Liability
GATE Enterprise sp. z o.o. sp. k. is not liable for any damages, injuries or accidents of any kind resulting from the use of this product or airsoft gun with the product installed, including (but not limited to) incidental or special damages to airsoft gun, airsoft gun parts and batteries.
Disclaimer
GATE Enterprise sp. z o.o. sp. k. takes no responsibility regarding compliance of the product with the requirements of any law, rule or airsoft restrictions pertaining thereto.
Intellectual Property
Intellectual Property owned by GATE Enterprise sp. z o.o. sp. k., including (but not limited to) devices, accessories, parts, software, documentation, is proprietary to GATE Enterprise sp. z o.o. sp. k. and protected under Polish laws, EU laws and international treaty provisions. You may not violate the rights of the Intellectual Property and you will not prepare derivative works of or reverse engineer the device or software. No ownership in the Intellectual Property is transferred to you.
GATE Limited Warranty Policy
GATE Enterprise sp. z o.o. sp. k. warrants that its Product is free from manufacturing and material defects at the date of purchase and for a period of two (2) years from the date of purchase and it is nonextendable. This Limited Warranty is conditioned upon proper use of Product by Purchaser.
This Limited Warranty is valid provided that the owner provides a proof of purchase and properly completed warranty form.
This Limited Warranty does not cover: (a) defects or damage (e.g. mechanical, thermal or chemical) resulting from accident, misuse (misinterpretation of the instructions), abuse, neglect, unusual physical, electrical or electromechanical stress, water immersion, repairs or structural modification of any part of Product, or (b) the Product that has its serial number removed or made illegible; (c) defects or damage from improper operation, maintenance or installation, (d) installation of the products.
Requests for warranty are processed as soon as possible, not exceeding seven (7) working days. The company’s obligation under this Limited Warranty shall be limited to providing replacement of parts only.
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Product Disposal Instructions
The symbol shown here means that the product is classified as Electrical or Electronic Equipment and should not be disposed with other household and commercial waste at the end of its working life. The Waste of Electrical and Electronic Equipment (WEEE Directive 2012/19/EU) has been put in place to recycle products using best available recovery and recycling techniques to minimize the impact on the environment. Purchasers shall take any old electrical equipment to waste recycling public centres or points of sale.
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Product Compliance
Declaration of Conformity
GATE Enterprise sp. z o.o. sp. k. hereby declares under its sole responsibility that PULSAR S & PULSAR D HPA Engine – are in conformity with the essential requirements of the following directives: 2014/53/UE, 2011/65/UE.
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