HFT 500 servicing advice

[SteveFields]

I have a second hand HFT500 owned almost a year, which does not leak, normally very accurate but last few days a few erratic groups makes me think a service is overdue. (I do clean the barrel regularly and feed it good ammo. I have taken apart and tuned a lot of springers but never a PCP. Are there any good video tutorials. Do you recommend replacing all O rings, whilst about the task or just clean and polish the hammer guide, really any advice from those who have set about the task, thanks for any help.

Cheers Steve

[Blackbaronfish]

I only ever clean a air rifle barrel when accuracy fall off.

Service when leaking.

Clean hammer rail when ever the power goes up and down.

BBF

[SteveFields]

Thanks BBF,

I'll clean the hammer rail and report back,
oh if anybody has seen a decent strip down video please share, thanks