Introduction: repairman, tinkerer, experimenter

[nimblebee]

Recently my friend was discarding a non-working Crosman pumpmaster, which I resurrected and henceforth restored.

Pumpmaster BB gun reminded me of my Crosman powermaster which was stored in attic, needing repair.

Because pumpmaster was much lighter in weight, installed sling, deciding would prefer carrying lighter BB gun, leaving powermaster to restore for use in bedroom's indoor BB target range, thereby avoiding need of lugging heavy powermaster about.

I would like to download an owner's manual for powermaster, because repairs are needed, & uncertain how much learned working on pumpmaster would be applicable to repairing powermaster?

 

[beerthief]

welcome to the best AGN
I am sure you can find it to download .

 

[nimblebee]

Thanks! I'll see what manual can find to download.

The pumpmaster and powermaster look very similar on outside. Unclear of any variations on functionality inside?

If the repairs proceed on powermaster as things progressed on pumpmaster, likely to be mostly matter of cleaning gunk and replacing worn seals.

 

[ToddGeddes63]

Welcome to AGN

 

[Long_Gun_Dallas]

I'd imagine it's a relatively simple design. I'd just take it apart, and see what needs doing. Order up some new seals once you measure them, and then back together.

 

[marflow 777]

if you go to Crosman you will find parts diagrams and owner's manual in PDF
now the 760 has had many variations and i am not talking 3 or 4 there are 14 models that have 760 in their name
so, your homework is going to be lengthy
https://support.crosman.com/hc/en-us/sections/200658060-Crosman-Air-Rifles?page=3#articles
here is a 5 part series on the 760
https://www.pyramydair.com/blog/2020/04/crosman-760-pumpmaster-classic-part-5/

there will be a pop quiz on Monday study up LOL

 

[nimblebee]

lol Agree, repair's probably a simple matter... Hopefully not like a smartphone, where you have to be smarter than the phone! lol

Looking at both BB guns, seeing minor external differences, lending credance indicating internals similar, yet expecting minor variations?

Repair parts ordered for pumpmaster BB gun found to be undersized (IE: due to wear and tear?), necessitated trip to hardware store, going through "O" rings until finding what functioned.

 

[Revoman]

Welcome to a friendly and informative forum. I hope that you find the information to repair your Pumpmaster.
Mike

 

[HogKiller]

Oh my, another future victim of the dreaded Rabbit Hole®. Welcome enjoy the trip.

 

[nimblebee]

You were right on the money, marflow 777, saying it'd take homework figuring specific model.


Looking at parts breakdown from information you've shared, narrows down to similar 760 models which could potentially be, ID going by checkering/plastic molding, shape of stock & those sort of features.


I'll be researching forum threads in helping differentiate further, where applicable, likely enough details available via parts breakdown to begin disassembly and troubleshooting/repairs.