You did not state what was wrong with the R34. Can not help you fix something if you don't say what is wrong with it.
If it's still under warranty I suggest that you contact Crosman:
CUSTOMER SERVICE: (see the link below)
The Crosman r34 is not automatic or semi-automatic. You have to manually reset the action for every bb you shoot.
There is no battery pack in the rifle. You have to cock it before each shot. The only battery in the rifle is in the flashlight.
The Fore-grip is under the barrel (it's removable and adjustable) It attaches to the rail under the barrel.
The Crosman r34 is quite acurrate within 30 feet. The r34 is not accurate past 50 feet. This gun begins to curve to the left or right past 50 feet. It's not a straight shot, which makes me think that the hop-up is cheap and puts a little bit of curve in the wrong direction.
Depends on what is wrong with it. You did not say.
It all depends on what is wrong with it.
If it's still under warranty I would send it back to Crosman or at least contact customer service at Crosman. WWW.Crosman.com
See the link below.
Most likely "No," but here is the parts drawing for the pistol (see the link below) Crosman offers a service to locate repair shops that fix older Crosman air guns see the link below
Crosman offers a service to locate repair shops that fix Crosman airguns that are out of warranty (antiques) See the link below. For the parts manual see the link #2 below
R34 does 0-60 in 56secs
Crosman still services this pistol it is best to contact them and tell them what you need, their address is: Crosman Corporation7629 Routes 5 & 20East Bloomfield, NY 144431-800-7AIRGUN (724-7486)