All Springer/NP/PCP Air Gun Discussion General > Vintage Air Gun Gate
Crosman 600 Restoration – Part 2 of 3
WyoMan:
Reversing the order of disassembly (somewhat) I’ll install the valve in the tube first. The valve goes in from the front and needs to have the front and back halves loose (o-ring uncompressed). Also, make sure the breech gasket (square o-ring) is removed from the tube:
The back half of the valve needs to be located for the two retaining sleeves:
Install the retaining sleeves with a 6-32 screw. I’m using a 2” length so I can hold it better. Getting them both started and working them in at the same time with some light oil is probably a good idea:
Sleeves need to be flush with the tube…shown here with the breech gasket installed:
Now I can tighten the front half of the valve with the spanner tool (shown in part 1):
Next up is the hammer and cam ring installation. The inside of the hammer needs a dry lube and the outside needs something similar to moly. I also polished the cam ring and rounded the leading edges:
Slide the hammer into the tube from the back and place the cam ring in the slot like this:
Now the cam can be rotated and slid on the hammer – the square part of the smaller ring needs to be in front:
The tube goes into the frame from the rear. Positioning the breech gasket at about 2 o-clock (position) avoids the gaping cross pin hole. Once the gasket clears the hole then align for the cam ring:
Slide the tube in and stop when there is about one half inch remaining. The pawl needs to be installed next and rotated forward before the tube is all the way in:
Align cross pin holes and install the spring, buffer and pin:
Next up is the trigger group – here are the old parts:
Aside from the crusty old lubes everything except the link looks good. The link will be replaced with the top one... spare parts to the rescue again!
Rethinking things, I decided to soak all the trigger parts in some penetrating oil and move on to the slide group next.
Slide group parts:
The slide group goes in from the rear. Some grease on the spring will hold it in the recess while you try not to lose the detent ball. Start the slide in the dovetail with the spring and guide in the recess. Then press the ball in while you move the slide forward to capture everything in the dovetail. If you lose the ball bearing, a 3/32” from your 13xx or 22xx safety will work!
Back to the trigger group…I installed the components in the following order: Trigger w/ spring, Hammer Sear, Trigger Sear, Link, and then Stop Roller & Stop:
The cam and feed arm install at the same time. Two set screws (8-32) go in the same hole (one top of the other) and locate the feed arm on the cam - where the recess is drilled. I lube the cam with moly and then slide it thru the cam ring and feed arm. It’s sometimes trial and error to get the first set screw into the drilled recess:
The remaining parts are pretty simple: The barrel, the follower and knob, the magazine spring, rear cover and sight, and the grips. The rear sight has a tiny ball bearing for the “click adjustment”. Tiny as in “tiny” chance it will be found if lost. I keep it in a parts bag, on a magnet, or in the gun!
Finished:
Restoration completed... up next are mods… Part 3
Part1: https://www.gatewaytoairguns.org/GTA/index.php?topic=121809.msg1181445#msg1181445
Part3: http://www.gatewaytoairguns.org/GTA/index.php?topic=121811.0
Wyo
Hare splittin:
Very nice restore. Better than factory. Especially like the ceramic coat.
Did not know there was so much inside these. Those trigger springs look like they would be hard to come by.
Saw one of these in a pawn shop w/ box asking $225, and I think it leaked. Never got serious about it, but became intrigued w/ semi-auto pellet pistol. Don't make them like this anymore.
Thanks for the concise, detailed write up. A very good tutorial.
Rob M:
thanks for this WYO , just got a 600 , first time.. it came with the box and works perfect.. But like you i need to tinker some.
Roboslug:
WYO, I'm glad this thread popped up again. I can't thank you enough for the details on it. I've resealed two 600's since November. The first one, rebuilt in May, still gets 36 - 38 shots per Co2 cartridge with around 1,100 pellets so far.
Rebuilding the 600 isn't difficult, just very daunting and tedious.
Roboslug
Rob M:
silly question , aside from the top set screw , what else retains the barrel?
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