I had the accumulator bladder blow twice last winter,  once 2012 Putz 16cell, once 2007 Putz 16cell both 32W hydro oil.  With the 07 Putz this morning, reverse stroking pre heating boom, funny shifting sound, yup blow.  Been cold lately, around -20C to -30C day time high, not too windy.  Drive time is a hurryed smoke or drive 15km/hr from the barn.  setup and first 1/2hr RPMs at 1200 - 1400.  drain that little bit of hydro oil from resevaoir during the weekly.  Never rocket prime and havn't been pumping hard.

Ive operated schwing, alliance, concords and different putzs in the same temps with 3 hr drive time and never had an issue doing the same routine.

Im tring to figure out if its fluids, parts or warm up procedures that is blowing me bladder.

Any thoughts and ideas?

extreme changes in weather are more likely the culprit here. Going from a Warm, relaxed state to a Frozen state on the job with the bag Collapsed while out of PTO, then engaging the PTO and filling the bag up .. since its froze pretty much, its brittle so it blows up.

Do you hit the e-stop before waiting on trucks?

No, I dont hit the E-stop in my routine.  

Whats your thinkin/reason when hitting the E-stop?

Deflates bag

10 - 4.  What is deflating the bladder going to do other than deflate the bladder?

Have the tools to do it ? If not have a hyd. shop charge the bladder if it leaks you need a accumulator . No leaks an your good to go. Winter summer pump on or off most failures occor with lower nitorgen in the bladder .

dlee,  Limped her through last job, a slow 35m.  Bring her back the the shop for Christmas Break.  I've never have done an accumulator, hydro service trucks are big bucks.

Actually, hitting the E-Stop will not “Deflate” the bladder it dumps the stored hydraulic pressure in the system, this allows the bladder in the bottle to expand to full size in the bottle but it still has the nitrogen precharge in it. Normal charge is 90 to 100 Bar.

In the extreme cold I have started encouraging guys to insulate the bottle, during the drive to the job the cold wind will chill the bottle and this can make the rubber brittle.

Some guys have issues with this and some don’t, it could be related to the location of the bottle, if it is mounted out in the open the cold air of driving can chill the bottle almost freezing it and the bladder inside. Guys in the extreme temps all over have told me that a wrap of insulating material has helped them a bunch.

That's correct. The accumulator bladder is always charged with nitrogen. The shift pump, or accumulator pump pushes hydraulic oil past a one way check valve into your accumulator bottle. I have seen one of these check valves blow the spool apart. It might be possible you have some type of debris in your oil getting pumped up inside your accumulator and actually puncturing the bladder. In my opinion, when its real cold outside, debris travels through the hydraulic system easier than when it warm outside. The oil is thicker. Another idea though is due to water. Water always finds the low spot in the hydraulic system. If you are getting a bunch of moisture in the hydraulic tank, it will freeze, and this could damage your hydrauluc pumps. Just another perspective. Good luck.