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Crosman 1400. . . . need some input on trigger mods....

March 28 2013 at 10:09 AM

MobyMyster in KS  (Login MobyMyster)
YF

I've got this super nice little 1400 that I purchased new probably 40+ years ago.
Take it out a couple times a year, shoot it a few times, wipe it all done good,
put 2 pumps in it and put it away.

As anyone who's shot a 1400 knows, the trigger is lousy. Has anyone done any mods
to improve this little guns trigger....?

Any imput and/or suggestions much appreciaated....... Thanks in advance...!

[linked image]

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james perotti
(Login jpsaxnc)
YFOT

The trigger can be made much nicer,

March 28 2013, 10:44 AM 

#1 a weaker trigger spring can be used. #2 The lip of cylindrical sear can be rounded a bit and polished. #3 a set screw can be installed on the long top part of the trigger, to limit sear engagement. What happens with the sear, is that it cams over, further than necessary. hth

 
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Diamondback
(Login Diamondback)
YC

I'd hoped the trigger was nicer.

March 28 2013, 10:50 AM 

I have an older version that doesn't have the safety in the trigger guard. The more you pump it, the harder the trigger pull.

I picked up one like yours years ago, with the rotating safety, hoping the trigger would be like my QB's & CR 180's that have the same trigger unit. I haven't shot it because it needs a rebuild.

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Diamondback

Truth is Stranger than Fiction..... wink.gif

 
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Steve in NC
(Login pneuguy)
GM

The Archer true-2-stage trigger kit fits the CR160 trigger...

March 28 2013, 11:51 AM 

...with the rotating sear...

http://www.archerairguns.com/QB78-2-Stage-Trigger-Kit-p/2stagetrigger.htm

...but I think the 140 and 1400 triggers are different internally, because of the difference between the blow-open vs knock-open valves used on the pumpers vs CO2 powerplants.

Steve

 
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scot laughlin
(Login classicalgas)
YF

Steve is correct, the 160/QB has the same trigger group casting, but not

March 28 2013, 12:11 PM 

the same internal parts as the 1400. It's been 20 years since I was inside one, but as I recall, in the 1400 the trigger cams down the sear that blocks the valve shut.

I doubt the QB trigger could be made to work on the 1400.Too bad, the trigger is the only thing that keeps the 1400 from being a great gun.


    
This message has been edited by classicalgas on Mar 28, 2013 12:12 PM


 
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Ron Robinson
(Login compressive)
YC

Crosman 1400 excerpt from Airgun Chronicles

March 28 2013, 1:16 PM 

Below is an excerpt from the chapter titled "Pneumophilia". The Velocities Testing section of the book also has testing data of SEVEN stock and customized Crosman 1400's (and variants).

"While my love of classic Crosman Co2 guns runs irrationally deep and wide, that obsession does not translate to most Crosman pump models. However the Crosman 1400 (and variants thereof) exhibit a combination of style, quality and performance that hits the spot (so to speak). The 1400 is of blued steel construction, and its barrel of heavier bull-barrel configuration than any other American pump. Pumping effort also seems a bit less strenuous than other pump guns. Additionally, the pop-off valve design imparts nano-second shot-time; unfortunately it also increases trigger weight as the number of pump strokes increase. Worse yet, every Crosman 1400 Ive encountered exhibited excessive amounts of trigger creep.
Smitten with the positive attributes of the 1400 and wondering about accuracy potentials, I set about correcting the hideous trigger action. A sear-engagement plate was fashioned, resulting in a wonderfully crisp trigger-break. Though little could be done to lighten the trigger pull, the resulting super-crisp let-off is preferable to a light, creepy trigger. The (now) crisp trigger and instant shot-time (inherent to the pop-off valve) make for a very gratifying pellet launch and sharp muzzle report. No other pump-gun fires with as authoritatively sharp a POW! as a healthy Crosman 1400. The sharp report, bull-barrel and instant shot-time endow the 1400 with a pugnacious appeal all its own.
A deal was struck for two Sears J.C. Higgins variants of the Crosman 1400; one a disassembled basket-case, and both leakers. The J.C. Higgins variants sport heftier blonde stocks, white barrel spacers (instead of black), and most importantly, scope-grooved breeches. Installing the scope-grooved barrel from the basket-case rifle onto my slim-line 1400 finally allowed more serious accuracy testing, virtue of optical sights. The scoped 1400 shoots just about as well as the classic Sheridan Blue Streak; averaging 3/4 to 1 groups at fifty yards with JSB Express pellets at 650 FPS on ten pumps.
[linked image]
The two Sears 1400s were subsequently sent to Alan Schweitzer at AB Airguns for resealing with what he terms a power re-seal. The essence of this work is adjustment of the pump linkage to bottom-out the pump cup with every stroke and drilling of a small hole in the pump tube for slightly better air intake. So tuned, the Sears guns returned a worthwhile performance improvement of about 30 FPS more velocity on ten pumps than a stock 1400.
The heavier stock of the Sears J.C. Higgins gun compliments the relatively bull barrel of a 1400 for enhanced heft, and also allows better grip purchase for heavy pump charges. Altogether the Sears J.C. Higgins variants have a heftier feel than other American pumps, but still need help in the trigger department. Ever the glutton for punishment in the quest for performance, I couldnt resist performing the sear-engagement modification to one of the hopped-up Sears guns.
That exercise was a reminder not only of how tedious and time-consuming the trigger modification is, but also how well it returns an incredibly crisp trigger break. The modified J.C. Higgins gun groups the same as the slim-line 1400, but with a bit extra punch (virtue of the power re-seal). Approaching 700 FPS on ten pumps with 14.3 grain JSB Express pellets puts it over fifteen foot-pounds; a right respectable power level for a handy, 35 pump carbine."

 
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JW Walker
(Login JWWalker)
YF

The easiest thing to do

March 28 2013, 1:36 PM 

Top screw on the back of the trigger will adjust weight of trigger pull,little tiny screw at bottom is overtravel. Carefully take side plate off and remove trigger,check face of trigger where sear engagement is {it will be brighter on the sear face}if it is rough stone it smooth, slowly with a trigger stone not a emory board,lube sear face and pivot point with moly lube. Reassemble and enjoy one fine trigger. Just did it yesterday to my newest prize.

 
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MobyMyster in KS
(Login MobyMyster)
YF

Thanks to all you guys who responded. Much appreciated.../nt

March 28 2013, 9:08 PM 


 
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