And try not to lose any bits on the garage floor !!
Before strip down 10 ft lb.
After strip down, clean, lube and reassembly...4.5 ft lb..
Looks like I'm going to get more practice taking this apart..
Will add anything I think might help to the aptly named 'Idiot's guide'.....
As John said, a spring compressor is vital in order to get the chain to recouple..
And try not to lose any bits on the garage floor !!
Hmm, rather sad and I hope you get it sorted.
Now these comments may be irrelevant to you but I have vague recollections from my past searches for info that:
The springs used are of different length and spec. And balancing the action such that the two pistons meet at the correct spot at the correct time is crucial. I also seem to recall that someone, somewhere said that two different sets of springs were used and gave the relevant specs and a possible supplier.
As I say, this may be totally irrelevant and you are fully aware of it all, especially as I have never delved inside a 91 or 93.
Cheers, and I look forward to your notes,
Phil
Hi , me again
Your note spurred me on to see if I had any other info and it turns out I do but I am not sure of the origin:
PARK RH 93 Springs
Hi, if its any help I have these spring dimensions from my *Park RH 93.*
They were measured when the gun was nearly brand new and thus can be reasonably used as reference points if the *Park 91* has the same cylinder/action dimensions.
Short Spring, (pushing front piston rearwards).
3.9mm wire x 19 coils Weight: 108 grammes.
Length: 14.8cm Outside Dia:23.3mm. Internal Dia.:15.5mm.
Long Spring,
3.3mm wire x 29 coils. Weight:94 grammes.
Length: 16.3cm Outside Dia.:18.3mm. Internal Dia.:11.6mm
My gun came with a .22 calibre barrel and I made and fitted a .177 HW barrel to it because the design makes it very easy to swop barrels around.
The required changes included the probe and O ring.
The barrel to cylinder seal remained the same.
AND:
Hi, I had bought a new spare set (not factory originals) off somebody in the UK many years ago.
Here are the two sets of dimensions for the standard factory springs as found in the gun and for those supplied as spares later.
I do not recall the spare springs supplier.
Standard dimensions as from the factory:
Short Spring, (pushing front piston towards the stock).
3.9mm wire x 19 coils Weight: 108 grammes.
Length: 14.8cm Outside Dia:23.3mm. Internal Dia.:15.5mm.
Long Spring, (located above trigger).
3.3mm wire x 29 coils. Weight:94 grammes.
Length: 16.3cm Outside Dia.:18.3mm. Internal Dia.:11.6mm.
Dimensions of spare springs supplied by ??.
Short Spring,(pushing front piston rearwards towards the stock).
3.8mm wire x 21 coils. Weight: 102 grammes.
Length: 17.5cm. Outside Dia.:23.4mm. Internal Dia.:16.2mm.
Long Spring,(located above trigger).
3.4mm wire x32 coils. Weight: 100 grammes.
Length: 22cm. Outside Dia:18mm. Internal Dia.:11.2mm.
The thing to bear in mind is that the unequal strength of the springs is designed to ensure that one piston pulls the other keeping the chain taut preventing snagging. So I suppose that any two springs similar to the dimensions above should work fine.
***************
Apologies for not finding this info earlier,
Cheers, Phil
Thanks Phil.
Lots of help and advice on here...
Very grateful !!
Thats a short HW80 spring at the front and what looks like a small diameter BSA spring at the rear. The HW30 spring is similar, but almost certainly too weak.
My ignore list: <Hidden information>
Got it back up to 10 ft lb but it's not so consistent without all the grease that was in it.
Think I need to do the seals. Does anyone know what the specs for these are please or where I might be able to source them.
Simon