Cerwyn
Cerwyn (Site Admin)
Number of posts : 11090
Age : 65
Location / Country : North Wales
Registration date : 2008-07-20
 | Subject: Basic Troubleshooting Guide... Hudson M3A1 "Grease Gun"  Tue Sep 09, 2008 5:12 pm | |
| Basic Trouble Shooting Guide... Hudson M3A1 "Grease Gun" ***UNDER CONSTRUCTION***PHOTOS TO FOLLOW*** Field Stripping, Cleaning, Inspection and Re-assembly have already been covered in previous Step by Step Guides so this guide aims to pinpoint causes of problems when your M3A1 refuses to operate correctly.
Although some of Hudsons’ model guns have a rather tarnished reputation of being unreliable and fragile, their “Grease Gun” can be a very good and consistent firing model straight out of the box.
Any problems that may occur may well be caused by Maintenance problems or general wear and tear. It is a very easy model gun to strip and check and can be restored to good firing order. 1. Rounds failing to ignite.Have the cartridges been prepared and loaded correctly?
Are the caps used the correct type and in good condition?Ref: Beginner’s Guide to… Loading Hudson C.P. type CartridgesCheck condition of Detonator Pin
Check condition of the Detonator Chamber for cracks and splits.
Ensure the Pin is clean and straight.
This modelgun’s Detonator Chamber sometimes cracks about its base where the Pin is held. The action of the Bolt striking rounds repeatedly pushes the Pin back into the ABS chamber and as a Grubscrew clamps the Pin cracks can appear causing the Pin to be pushed too far back away from the cartridge internals, thus failing to strike the cap.
TOP TIP:When you put the Grease Gun back together leave the grub screw that holds the detonator pin out, apparently this prevents the chamber from splitting which is a common fault with this model. 2. Rounds fire but will not extract from Chamber.Check that the Detonator Pin and Chamber are clean and not clogged up with Dirt and deposits left from previous firing sessions.
Clogged up Chambers will grab cartridges and stop them being withdrawn by the extractor.Ref: Hudson M3A1 “Grease Gun” Cleaning and Lubrication…
Check the Extractor is working correctly.
Load a round with a “Dead” cap and insert it into the magazine.
Fit the mag’ into the gun, cock it and pull the trigger.
The bolt should strip the round from the mag’ and feed it into the Chamber. It will not fire as the dead cap has no charge so the gun now has the Bolt fully forwards and closed.
Hold the gun level and keeping an eye on the ejection port, slowly pull the bolt back manually.
The round should be seen to be pulled back out of the chamber as it’s gripped to the bolt face by the Extractor claw.
Ease the bolt back until the round is fully withdrawn.
If the round fails to withdraw at all, it may be stuck in the chamber in clogged up dirt.
If the round starts to withdraw, but drops off the bolt face before reaching the Ejector, then there may be a problem with worn out or broken Extractor Claw, Claw Spring, or Bolt Face.
One or both of the Feed Prongs may have snapped off. For more information Ref: Hudson M3A1 "Grease Gun" Inspection Guide… 3.Rounds Fire but fail to Blow Back.Check that Detonator Pin and Chamber are clean… see above
Ensure that cartridges are prepared, lubricated and loaded correctly … see above
Try substituting Hudson’s own cartridge Piston with MGC ones. The MGC type do not have a hole drilled through the piston centre and may well seal in more gas pressure as the cap ignites giving much better blowback.
Note, however, the Detonator pin will have to be shortened to suit the MGC piston’s extra length. Ref: Tuning Guide… Hudson M3A1 "Grease Gun" (also Hudson PPSh41)4.Rounds extract but will not eject from the gun.Check that the ejector has not broken.
Check that the Magazine spring has enough tension to bring the next round up into the gun thereby pushing the fired round out.5.Magazine not Feeding rounds up under tension.Load about 20 rounds into the magazine. Push the cartridge down into the magazine body to check for spring pressure.
If it feels sloppy or sticks, then dismantle the magazine. Clean the inside of the mag' follower and underside of the feed lips thoroughly. Check the spring for breakage, rust and the carrier for burrs that may cause friction in the magazine.
Are the cartridge rims fouling against each other stopping them stripping from the magazine’s feed lips?6.Bolt not stripping rounds from the Magazine.Magazine spring too strong… (unlikely if using genuine Hudson magazines)
Magazine Feed Lips bent, burred or damaged
Bolt “Chin” broken, chipped or missing
Ref: Hudson M3A1 "Grease Gun" Inspection of components…
Recoil Spring worn out and too weak7. Trigger and Sear.Problems here may lead to the gun firing accidentally and uncontrollably or the bolt refusing to move forward when the trigger is pulled.
The Sear moves down into the Lower Receiver when the trigger is squeezed. Ensure it drops into its recess cleanly and that it returns smoothly when the trigger is released.
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2344Reassembly Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2343 Basic Strip Down
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2345 Basic Clean & Lubrication
Ref: http://www.mp40modelguns.com/forum2/viewtopic.php?t=2349 Parts Inspection
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2293 Cleaning & Prep Cartridges
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2323 Loading Hudson Cartridges
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2266 Loading MGC Cartridges
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2352 Troubleshooting
Ref:http://www.mp40modelguns.com/forum2/viewtopic.php?t=2351Tuning TipsCerwyn | |
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