CAUTION: READ AND FOLLOW ALL SAFETY GUIDELINES AND WARNINGS BEFORE HANDLING OR
ATTEMPTING ANY WORK ON YOUR FIELD ONE PAINTBALL MARKER. SHOULD YOU BE UNSURE AT ANY
POINT, STOP AND GET HELP FROM A FIELD ONE PAINTBALL CERTIFIED TECHNICIAN.
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Force Nucleus Engine
The Force Nucleus Engine is a Spool Valve type engine that works by moving air from the volume chamber through the bolt tip to propel the
paintball through the barrel at consistent velocities. With each shot cycle, the Force solenoid provides a measured amount of air to the
engine, moving the ram and bolt forward and back to open and close the different chambers of the Force Nucleus Engine. The Nucleus
Engine is made up of 7 main components:
• Bolt Tip
• Ram Shaft
• Reduction Shaft
• Volume Chamber
• Brass
Shut Off
• Ram Housing
• Back Block and Back Cap Assembly
The Force Nucleus Engine was designed to provide peak performance with minimal maintenance. Field One recommends only performing
routine maintenance on the Nucleus Engine if you experience a drop off in performance or after 40,000 shots. Routine maintenance for the
Force Nucleus Engine only requires separating the engine halves and applying a small amount of grease to specific areas. Because the
Nucleus Engine utilizes directional U-CUP seals for it’s dynamic seals, the replacement of these seals is seldom required but must be done
with care in a clean area. Testing in the F1 lab and in field tests under extreme conditions produced excellent durability testing results and
showed that the Nucleus Engine is capable of 100,000+ shots before replacing any of the directional U-CUP seals. With properly performed
basic maintenance, keeping your Force Nucleus Engine running at peak performance is quick and easy. Please consult the Field One Force
Quick Start Guide or the Force User Manual Maintenance guide for basic maintenance. If needed there is a diagram of the Force Engine
and an O-ring chart included in the Force User Manual and the Force Quick Start Guide to help with disassembly and assembly of the Force
Engine. There is also a video tutorial available on the Field One Paintball Website that shows how to disassemble, maintain and reassemble
the Force Engine.
Magnetic Back Cap Detaining Ball
Gas Interlock Magnet Post
Gas Interlock Piston
Gas Interlock Spring
Gas Interlock Assembly
Back Cap
Pillow Tip Insert
Back Block Screw
Back Block Pin
Back Block
Reduction Shaft Support Pad
Retraction Bumper (on reduction shaft)
1x2 between R
am Housing
and Reduction Shaft
Reduction Shaft
Ram Housing
021 Outside Ram Housing
1x15 between Ram Housing and
Volume Chamber
017 Inside Volume Chamber
Brass Shut O
021 Outside Volume Chamber
020 Outside Volume Chamber front
011 U Cup Outside Ram (opening faces front)
Bolt
015 outside
Bolt
Ram
Extension Bumper (on Ram)
009 U Cup inside Ram (opening faces front)
110 U Cup inside Volume Chamber front
(opening faces back)
Volume Chamber
011 inside Brass S
hut Off front
011 U Cup inside Brass Shut Off rear
(openings face away from each other)
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