my DBO kit arrived today !!!

[1377x]

pivot pin replacement is in the top five things that need replacing with this gun
you can make one yourself if you have a dremel/rotary tool
mountainair has them for $5 the last i saw
do you have an adjustable piston?

[DBOdude]

thanks , i'll call tomorrow and check on the shipping . will this also need the holes drilled out to 3/16 inch ? i guess i'll go check ace hardware and southern states for something too . i'm surprised that neither lowes or homedepot had something in 3/16 though .



no FT setup yet , was gonna get that next month , but i may get the 1701P (PN# 2220-103) trigger , spring and order a solid hammer from mellon air instead ..... 

[1377x]

on my guns no drillin/reaming of anykind was needed. see if it will fit before doing any reaming
i know homedepot has 3/16 brass aluminum and steel i was goung to get some but it was long 4" lengths and all i need is 1" lengths
menards has them and i know ace carries them too
not hard to make with a dremel a few member have made them in the past
cut to size chuck it up in a drill/drillpress use a cutting wheel on the dremel cut the groves. the number of cutting wheels skacked will change the size of the o-ring needed or if you can tap it. thats an option
a solid pin is definitely a must as you can see
no more pounding

[Tater]

on my guns no drillin/reaming of anykind was needed. see if it will fit before doing any reaming
i know homedepot has 3/16 brass aluminum and steel i was goung to get some but it was long 4" lengths and all i need is 1" lengths
menards has them and i know ace carries them too
not hard to make with a dremel a few member have made them in the past
cut to size chuck it up in a drill/drillpress use a cutting wheel on the dremel cut the groves. the number of cutting wheels skacked will change the size of the o-ring needed or if you can tap it. thats an option
a solid pin is definitely a must as you can see
no more pounding

Not to hijack, but I still have to pound. I drilled (turned by hand) it out to 3/16" too. not sure where I went wrong but the pump arm flops around some.

/hijack

[1377x]

Not to hijack, but I still have to pound. I drilled (turned by hand) it out to 3/16" too. not sure where I went wrong but the pump arm flops around some.

/hijack

did do anything to the pump lever? this part


if not it can stretch from having an improperly adjusted piston or hanging on it

[Tater]

No, just turned a 3/16" bit through it be hand.

[BDS]

Tater, did it take much "meat" out of the linkage hole when you used the drill bit?

If no, I'd guess it was already going egg-shape on you. What does it measure at?

[DBOdude]

a few updates ......
i wound up not drilling out to 1/4 inch and got a pivot pin from a.c.customparts . i got a 3/16 bit , but it went through the holes in the linkage and main tube without drilling and AC's pin went right in with no change to the stock pivot pin holes  . is it possible crosman has changed to a 3/16 roll pin ?

i also got a F/T valve from AC , waiting for him to make some more F/T pistons so i can get one to go with his valve . also got some MAC1 secret sauce so when i change them i'll clean and relube with it . also got some 30mm medium dovetail rings from MAC1 for my new scope .

took the CP 4-16x40 back to wally world and now have a leapers/utg 30mm 4-16x44 scope on it . love the scope , but don't care for the finger tightening thingies for the rings and didn't care for the looks with the little weaver to dovetail tab thingies under them . i have the wheel on mine and i'll admit it is a big scope and the wheel in combo with the stock rings and adapters under them looks really cluttered/busy on that side . changing to the 30mm medium dovetail rings helps tone that down some . the swat turret is tight and i'm very glad i went ahead and got the wheel , it makes focusing/changing parallax so easy !! it more than compensates for any detraction in looks IMO . heres a few pics with the initial ring/adapter setup ......





here's a couple with the new rings .





and one with the CP scope for comparing the size of the different scopes on the DBO



i like the new scope a lot . but keep in mind the leapers and centerpoint are the only real scopes i've used in decades . it looks great to me , love the size and spacing of the mil-dots and the side focus is sooooo nice . i did go out at dusk and as the sun went down the view got dimmer and dimmer (duh) but i could shoot ok with it for a while . but when it's dark (even with a "harvest moon") there is very little to be seen through the scope . shine a light on something at night though and it works great . didn't install the batteries to try the lighted reticle yet . and a question on that ..... if i put the batteries in and somehow forget they are in there can they leak and damage the scope or it's electronics ?

thats about it for now , gonna do a few cheap/freebie mods to the trigger , end plug/barrel band and may try extending the bolt ..... . but i'm gonna order a AC piston as soon as he puts them up for sale .

[vertguy]

a few updates ......
i wound up not drilling out to 1/4 inch and got a pivot pin from a.c.customparts . i got a 3/16 bit , but it went through the holes in the linkage and main tube without drilling and AC's pin went right in with no change to the stock pivot pin holes  . is it possible crosman has changed to a 3/16 roll pin ?

I just ordered the same pin in black and I decided to measure my relatively new PC77 after reading your post. Crosman must have changed the diameter as mine measures 3/16 as well. One less thing I need to do when the pin arrives

[1377x]

i have/had the first 1377's that came out and never had to drill anything to use a mellon pin which is 3/16 also
the only time drilling is needed imo is when you use the mellon bearing and i cant recall what size that is but i dont use it so it is a non-issue
glad you went the 3/16 way dbodude i have seen someone use a 1/4" pivot pin before but it the only time i have seen that one time.
your gun is coming together nicely

[DBOdude]

I just ordered the same pin in black ............

AC makes them in black ?

was just a $2 bit . i got it cause AC's add says " ...... Easy to install, all you have to do is drill out the pump pin holes to 3/16" because they are a bit undersized to begin with. ...... " no biggie 

thanks 1377x . it's gonna be a tool for me , nothing compared to many of the guns shown on this forum , some of which are IMHO truly works of art . shoot , i'd be scared to own or use some of them because honestly i'm a little clumsy sometimes . but i've done a good bit of lurking and asking questions and using the search function on the forum and hope/think i've made good parts and accessory choices so far . i do wish that 6-24 varmint deal had worked out though . i really don't use 6x or even 8x , i use 10x for 10 yards and looking at the back woodline at 16x i keep wondering what 24x would look like . LOL

[vertguy]

The black pin was not from Ac Custom, but it is the same basic pin in black.

http://www.ebay.com/itm/271261925725?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

[DBOdude]

thanks vertguy . 

[1377x]

i think that from use the pivot hole opens, especially if its getting lots of use and from over adjusted pistons
the one thing i noticed i used to do was hang on the pump arm when pumping that probably helped make the hole bigger too. i stopped hanging on the arm and adjusted my piston properly then hole has stayed the same size for the last several years
even with a stock piston you can still stretch the hole

[Tater]

That gun looks great DBO!