Sears branded 1400... so does it have the white barrel spacer, and maybe a scope rail?
Once you’ve done a 1377 and a 140 the 1400 will be pretty easy. The blow-open valve is a little different. The quad seal on the valve cap takes a little finesse but it’s nothing a first timer can’t handle. Replacing the parachute seal can be challenging but it’s doable if you have simple shop tools (vice). I’ve also used Mac1 airguns replacement flat top piston on .my sears model 1400. Much easier to install than a replacement parachute seal.Precision Pellet sells a very nice solid aluminum barrel spacer for the 1400 at a very reasonable price. Makes an excellent replacement if your old plastic spacer is failing.
I have resealed and refinished 2 140's. Check out the 140 Disassembly video on You Tube. Also check the Crosman website for Exploded Parts Diagrams for any Crosman airgun. That will give you all the Part Numbers you will need.The O-Ring Store online is agreat place to get o-rings, tooGood Luck and Enjoy,Steve
Well, the past few days have been educational.I found out the Crosman 101 won’t build pressure unless you cock it first. And, it’s not a .22, it’s a .177. I could close the bolt on a .22 pellet, but when I tried to run a.22 rod down the barrel to knock the pellet out, I figured that part out. I doubt it’s a model 100, the entire bolt was fabricated and it’s a brass barrel but everything else has been repainted gloss black. The 104 has a flow thru bolt and it was installed upside down, and the gasket on the transfer/exhaust was collapsed. Fortunately I had a spare I didn’t use from the 1377 rebuild. It’s weak, but it shoots.The Benjamin 342 was just plain pilot error. I thought the bolt was binding and only partially opened, wasn’t aware pulling it harder was the cocking mechanism. Duh.The Sears has an issue, not related to the missing safety. Doesn’t appear to be cocking at all, which won’t reset the trigger. Stripped it down as far as I could without special tools and something’s rattling around inside the receiver with the pump arm/linkage removed.