Crosman 600 O-Rings & Grease

[Roboslug]

Hi all,
The other morning surfing the usual auction/classified sites I stumbled across a Crosman 600 at AoA from the DT Fletcher collection.  Only a single picture, but I've had great luck with AoA, so i couldn't check out quick enough thinking "how many carts is thing in?".  It arrived in great shape and packaging.  I gassed it up and it held 24 hours and that (first) cartridge ran thirty six pellets, while the second ran nine and begin hissing around the seventh shot. 

Has anyone used urethane rings for the valve body seal (-54) or the hammer (-28).  If so, did they hold up?  Were they difficult to assemble?  What lube did you use on the OD of the hammer, if any? 

Any input is appreciated. 

Roboslug

[Dave S]

Urethane seals and O rings are really the only material that Co2 cannot permeate and should definitely be used on this gun. The 600 is THE most complex air gun ever designed and should be repaired by a qualified Air Gun Smith....ie.. Mac-1, Baker Airguns, etc....  The fact you don't know what O rings should be installed already tells me you may be over your head on this one. Tim at Mac-1 one will usually bench repair most of my Crosman guns when I bring them down on an off day. I was at his shop Tuesday morning and he resealed and fabricated a delrin seal on his lathe for the  exhaust valve for my 112 while I waited. Not so with my 600's.Too complex for a quick fix!  Sure, there are guys on this Forum who fix their own 600's, but they are the few exceptions to the rule. One more thing, I would recommend Mac-1, however, he is backlogged bigtime doing about 20 Sheridans right now. I would Call Baker Airguns and see if he can help you.  Just my 2 cents.
dave

[Roboslug]

Thanks Dave, this will be my second 600 to reseal.  I bought two sets of parts from JG and two valves off of the bay to start with.  (I really didn't know how it would go the first time).  The 600 disassembly/reassembly is a combination of tedious and daunting.  While shopping I did get a urethane -54 for the cap, but wasn't sure how to get in the tube if used for the valve body.  With the urethane being stiffer I was also hesitant to use one for ID hammer seal for fear of too much friction that might cause operation issues.  The first reseal now has about 1050 pellets through it since May averaging about 37-38 shots per cartridge.

I also fit a new cam and cam ring as the ring was very sloppy.  It functioned perfectly before the seal let go, but I figured that while I was in there I might as well change that too.  The DT Flectcher 600 is not near as sloppy as my first one and I don't anticipate having to fit a new cam set.   

The DT Fletcher 600 must be an earlier model as the slot in the frame for the safety is about .39" while my other 600 is about .55".  The safety is not near as positive on the DT.  The sideplate is also different.  The DT 600 has five through holes as opposed to six for my other 600.  It is also sans the -90 plate and -92 bearing with a trigger pin too short to accommodate them anyway. 

[Dave S]

Thanks Dave, this will be my second 600 to reseal.  I bought two sets of parts from JG and two valves off of the bay to start with.  (I really didn't know how it would go the first time).  The 600 disassembly/reassembly is a combination of tedious and daunting.  While shopping I did get a urethane -54 for the cap, but wasn't sure how to get in the tube if used for the valve body.  With the urethane being stiffer I was also hesitant to use one for ID hammer seal for fear of too much friction that might cause operation issues.  The first reseal now has about 1050 pellets through it since May averaging about 37-38 shots per cartridge.

I also fit a new cam and cam ring as the ring was very sloppy.  It functioned perfectly before the seal let go, but I figured that while I was in there I might as well change that too.  The DT Flectcher 600 is not near as sloppy as my first one and I don't anticipate having to fit a new cam set.   

The DT Fletcher 600 must be an earlier model as the slot in the frame for the safety is about .39" while my other 600 is about .55".  The safety is not near as positive on the DT.  The sideplate is also different.  The DT 600 has five through holes as opposed to six for my other 600.  It is also sans the -90 plate and -92 bearing with a trigger pin too short to accommodate them anyway.

Floyd, Looks like you know your way around the gun and that's a good thing! I have the luxury of living 15 minutes away from Mac-1 and have known Tim for over 30 years. I have a stock 600 Bulk-fed and another one Tim did that has a 12" barrel and is Bulk fed. Gun clocks at 525 fps with 14.3 gr Premiers. Gun gets well over 100 full power shots per charge. Best semi-auto .22 pistol ever made! BTW, I remember back in the mid 60's seeing these guns sell brand new in the box for around $20.00! How times have changed!
dave

[Roboslug]

I finished re-assembling the DTF 600 tonight and ran one Co2 cartridge through it.  It ran 47 shots until it emptied.  It will eventually settle down to the mid-30's I suppose.  I used the rubber valve seal and brand "E" valve that I had on hand.  After seeing the disintegrated white plastic on the face of the old valve I don't expect this to last forever.  NEXT time I'll get Mac 1 valves.