Crosman 766 Manual

  1. Crosman 766 American Classic Manual
  2. Crosman 766 Factory Service Manual
  3. Crosman Model 766 Manual
  4. Crosman Model 766 Manual
  5. Crosman 766 Manual Online
  1. The Crosman 760 Pumpmaster with Scope is perfect for the beginning shooter. The BB reservoir holds up to 1000.177 caliber steel BBs, the Pumpmaster 760 shoots them up to 700 FPS, and the 4x15 scope creates superior accuracy.
  2. Model Number 766 Name / Description Pneumatic, BB repeater,.177 cal., single shot. Second variant with tapered steel barrel housing. Dates of Manufa.
FOR SALE
VINTAGE CROSMAN 766 PUMP-UP REPEATER AIR RIFLES in .177

There are 3 versions of the 766 see the link below for the owners manual and parts list. Where is the nearest repair shop for crosman 766 American clasic air rifle in Las Cruces New Mexico? Additionally, we are a factory-authorized repair/warranty station for popular brands such as Air Arms, Air Venturi, Crosman, Diana, Seneca, and Weihrauch airguns. Our experts also offer exclusive 10-for-$10 Test and 20-for-$20 Service, which evaluates your air gun prior to leaving our warehouse.


We are talking serious fun here!!
For those unfamiliar with the model this is one of Crosman’s most successful pneumatic air rifles and their site boasts that well over 12 million of them have now been sold.
The rifle is charged by pulling down the front fore end and ‘pumping’ it from 1-10 times (cheaper than going to the gym and far more fun...). Dennis Hiller’s Airgun Collectors book indicates that 3 pumps can give around 428fps, 6 pumps 567fps and 10 pumps 637fps in .177 pellet.
The rifle takes either .177 pellets as a single shot, or up to 100 BB’s can be loaded into the reservoir within the stock.
.177 pellets are loaded directly into the breach by pulling back the cocking lever on the right hand side and seating the pellet in the channel. When the cocking lever is returned the pellet is pushed forwards by a rod.
BB’s can be poured into the reservoir via an aperture in the butt of the pistol grip. The black cover on this can be slid backwards to expose the hole. With the BB’s in the reservoir the repeater tube on the left hand side can be cocked by pulling back the lever and locating it to compress the spring. If you then tip the gun forwards and rotate it a stream of BB’s will roll forward into the tube.
We never really used this with BB’s due to the ricochet factor. We just ploughed Marksman and Wasps through them at an array of paper targets and spinners at the bottom of the garden and Dad fitted a basic 4x20 scope to one and used it as an excellent ratter when some moved into the garden.
These have both been used and are working fine with pellets; I haven’t tried them with BB’s simply because we don’t have any. If you want to try either of them out before buying drop me an email and I’m sure we can sort something out…
I have TWO of these to try and rehome, one is slightly older with a different rear sight. There’s plenty of pictures of each so if you’re interested have a good look and contact me with any questions.
Both rifles;
http://i377.photobucket.com/albums/o...ink/cros18.jpg
Rifle 1 ; the older model version.
The stock and fore end are wood effect plastic and it has a rifled steel barrel.
Condition is good; no repairs or damage, all plastic is intact and it has the original Crosman marked butt plate. The rear sight blade is a fixed metal one with slot in the top. There is a push-safety button to the trigger housing which works fine. The barrel has lost a lot of the blueing as can be seen and there are some marks to the japanned finish of the action. Big Crosman logo to the left hand side with the model details.
Piccies;
Left hand side barrel
http://i377.photobucket.com/albums/o...ink/cros16.jpg
right hand side barrel
http://i377.photobucket.com/albums/o...fink/cros5.jpg
whole gun underside
Crosman 766 Manualhttp://i377.photobucket.com/albums/o...cros2older.jpg
Top of barrel detail
http://i377.photobucket.com/albums/o...nk/cros4-1.jpg
Action facing left
Crosmanhttp://i377.photobucket.com/albums/o...ros14older.jpg
Action facing right
http://i377.photobucket.com/albums/o...fink/cros7.jpg
Detail of crosman logo
http://i377.photobucket.com/albums/o...fink/cros8.jpg
Whole gun facing left
http://i377.photobucket.com/albums/o...ink/cros17.jpg
Whole gun facing right
http://i377.photobucket.com/albums/o...ink/cros10.jpg
right hand side forend detail
http://i377.photobucket.com/albums/o...fink/cros6.jpg

left hand side forend detail
http://i377.photobucket.com/albums/o...ink/cros15.jpg
BB reservoir sliding cap in pistol grip butt
http://i377.photobucket.com/albums/o...nk/cros3-1.jpg
rear sight detail
http://i377.photobucket.com/albums/o...ink/cros11.jpg

foresight detail
http://i377.photobucket.com/albums/o...ink/cros12.jpg
right hand side stock detail
http://i377.photobucket.com/albums/o...fink/cros9.jpg
left hand side stock detail
http://i377.photobucket.com/albums/o...ros13older.jpg
If you know how to date these then the serial number is 678015996: looks like June 1978.
I’m asking £49 collected or posted at cost: just give me time to round up a suitable box! Having just parcelled up the one below I know it'll weigh in at a shade under 3kg so for the UK the postal options would be;
1st class recorded delivery (insured to £39) £9
ParcelForce 48 (insured to £150) £13
Special delivery £21.65
* SOLD to White Ferret pending usual.
Rifle 2 ; the newer model version.
Again, the stock and fore end are wood effect plastic and it has a rifled steel barrel.
Condition is good; no repairs or damage, all plastic is intact and it has the original Crosman marked butt plate. The rear sight blade is an adjustable plastic one that moves up and down a ramp. There is a push-safety button to the trigger housing which works fine. Very few surface marks to either barrel or action; essentially very tidy. Crosman name to the left hand side of the barrel and model details to the right.
Serial number is 377461710, so March 1977
Piccies;
Left hand side barrel
http://i377.photobucket.com/albums/o...ink/cros33.jpg
Whole gun facing left
http://i377.photobucket.com/albums/o...ink/cros20.jpg
Whole gun underside
http://i377.photobucket.com/albums/o...ink/cros21.jpg
Left side forend detail
http://i377.photobucket.com/albums/o...ink/cros32.jpg
right hand side forend detail
http://i377.photobucket.com/albums/o...ink/cros27.jpg
right hand side crosman detail
http://i377.photobucket.com/albums/o...ink/cros25.jpg
right hand side stock detail
http://i377.photobucket.com/albums/o.../cros29new.jpg
BB reservoir in pistol grip butt
http://i377.photobucket.com/albums/o.../cros22new.jpg
underside showing serial no
http://i377.photobucket.com/albums/o...ink/cros34.jpg

left hand side stock detail
http://i377.photobucket.com/albums/o...ink/cros30.jpg
right hand side action detail

Crosman 766 American Classic Manual


http://i377.photobucket.com/albums/o...ink/cros28.jpg
left hand side action detail
http://i377.photobucket.com/albums/o...ink/cros31.jpg
foresight detail
http://i377.photobucket.com/albums/o...ink/cros23.jpg

rear sight detail
http://i377.photobucket.com/albums/o...ink/cros24.jpg

right hand side barrel model details
http://i377.photobucket.com/albums/o...nk/cros1-1.jpg
right hand side barrel
http://i377.photobucket.com/albums/o...ink/cros26.jpg
I’m asking £59 collected or posted at cost: again, just give me time to round up a suitable box! -SOLD to Rellum pending usual.
First to post to say they’ll have it gets it. -Please state which one you're interested in! If you want further piccies or details either PM me or contact direct at fossack@btopenworld.com.
Payment: Cash, cheques, postal orders and Paypal if sent as a gift. If anyone wants to collect in person I’m often at Shepreth, Kibworth and sometimes Lea Valley. Just email me and I’m sure we can suss something out…
In buying this item you are confirming to me that you are over eighteen and are not a prohibited person under section 21 of the fire arms act.
Related Blogs:
Crosman exhaust valve repair
I have been thinking about this conversion for a while now. I'm not sure what sparked this idea, Tom Gaylords Blog about the $100 dollar PCP or a random question on one of the Airgun forums I frequent. I can't remember, but I'm going to give it a 'shot' (pun intended).
My first thought was to use 12 gram CO2 cartridges since they are cheap and easy to get. I quickly gave up on this idea since it would require a tube larger than the 3/4' OD pump tube that comes on the Crosman pumpers and this would make the conversion much more complicated. So how would I keep the same size tube and still run this on CO2? Bulk fill is the answer, and a good one for me since I have the bottles and fill adapter that I use to run my Discovery on CO2. Another bonus is I will be able to try this project on HPA since I plan on using a Discovery fill fitting and I have a hand pump.
This conversion is pretty simple really, just replace the pump tube with a piece of 3/4' DOM tube, and add a fitting to fill the tube with CO2 or HPA.... there are a few other details but that is the basic idea.
I thought the 766 or 2100 would be a good candidate since the ones I've shot have been accurate shooters also I have rebuilt 4 or 5 of them so I'm pretty familiar with them.
During one of my visits to Gun Broker I came across an auction with a Crosman 140 and a 766 bundled together. Lucky for me the seller had misspelled Crosman so this auction went unnoticed by the other bidders and I got the rifles for a good price.

I like this version of the 766 for the conversion since it is the first version which while it has the soda straw barrel the barrel is encapsulated in plastic instead of like the later models that the barrel floated inside a metal tube.

Another thing I like about this version is that the valve is integrated into the breech, eliminating the transfer port seal. One less place for a leak.

I wanted to get this 766 shooting as a pumper so I would have a baseline to compare to after the switch to CO2. The pump seal was shot along with the exhaust valve. With repairs done I put it back together and put some pellets over the Chrony, the 580 fps at 10 pumps was a little disappointing but only 50 fps below the advertised 630 fps in the owners manual.
CPHP aren't looking like the best pellet for accuracy, my favorite pellet RWS Meisterkugeln 7 grain didn't do much better

With the baseline established I'm ready to start the conversion.
The 3/4' DOM tube I'll be using for the reservoir.

The slots milled for the valve/ breech and for the sear.

I ordered a few parts from Crosman, a fill fitting and gauge. I'm not sure if the gauge will go on the 766 for sure, it depends on how it turns out...

I installed the fill plug with socket head cap screws. The heads of the screws would have to shear off for the plug to come out. (Thanks to Big Bore Bart for this idea)
The valve is held in the tube by the two halves of the receiver, since I plan on trying this on HPA I added two screws to help hold the valve in.

Assembled and ready for the first shots on CO2. The good thing, it works! The bad, 14 shots dropped the velocity from 570 fps to 500 fps. I'm okay with the velocity but the shot count needs to be higher to make this worth shooting.

The original 766 hammer spring is meant to dump all the air in the valve with each shot. I replaced that spring with a 2260 hammer spring. That spring is a bit shorter and made from lighter wire. While I had the rifle apart I went ahead and drilled the center out of the check valve since it isn't needed to run this on CO2 or HPA.

These two changes made all the difference, velocity increased to 610 fps and the shot count increased dramatically. It now takes 40 shots for the velocity to drop down to 500 fps. I assume the increase in velocity came from disabling the check valve. CPHPs seem to like the 610 to 580 fps range. I got a nice round, dime sized group with the first 25 shots. I shot a second target once the fps dropped to 580. I shot 17 more times, I stopped when the velocity had reached 500 fps.

Happy with the results from CO2 it's on to HPA....
I started out with a 1000 psi fill. 12 shots dropped the velocity from a high of 678 psi to a low of 586 psi. The top target in the picture.
The lower target in the pic shows the results from a 1500 psi fill, 26 shots starting at a high of 735 fps down to a low of 566 fps.

I put the info from the Chrony into a spread sheet and printed out a graph. I think it is easier to see the performance with this visual representation.
The first 10 shots are pretty flat, slowly falling off after shot 12.

Crosman 766 Factory Service Manual

1800 psi nearly doubles the number of shots above 700 fps. shot #20 falls bellow the 700 fps mark and slowly falls off every shot after that.

Regardless of what the charts show the true test is where the pellets land on the target. I was still seeing fliers with the CPHP pellets so I got out the box of CPFT pellets I had just purchased to see what they would do. In the target bellow I shot 40 shots on a 1500 psi fill. 10 shots at each target. 35 out of 40 shots could be covered with a dime, 4 of the five that landed outside the dime size were the last four shots of the fill.

Since the CPFT pellets seem to work better I thought I'd switch back to CO2. 30 shots into a dime sized group. I shot the lower target with the last 10 shots, while the group is still dime sized it was starting to open up.

Crosman Model 766 Manual

Since I'm calling this project done I thought I should put the front stock on. It took a little work with the Dremmel to get the barrel band to fit and the front stock will be held in place with silicone. Other than the fitting you can't tell it's been converted.

Crosman Model 766 Manual


I'm happy with the way this project turned out, 30+ accurate shots at 10 yards on CO2! I prefer the self-regulating properties of CO2 over shooting with HPA. HPA has it's benefits, higher velocities and you can adjust the pressure for the best performance. Since most of my shooting is at 30 feet in my basement I'll power this rifle with CO2.



Crosman 766 Manual Online