REED 00 C50SS, Manual, Page: 74 / 84

REED
00 MODEL:
C50SS
TRAILER CONCRETE PUMP
MAINT
PAGE 44
ACCUMULATOR
It was noted in the S-TUBE SHIFT CIRCUIT description that the S-tube must shift alternately
from one cylinder to the other in a synchronized operation. In addition this shift must be
almost simultaneously. This instant pressure and volume cannot be provided by the system
itself. To compensate for this an accumulator is used.
This is made up with an outer shell or tank, a rubber bladder installed inside the shell, a gas
valve with port on top of the shell and a fluid port at the bottom of the shell complete with the
necessary valves and seals.
To successfully work in the system and do the job intended the accumulator must first be pre-
charged. This operation involved the induction of
DRY NITROGEN GAS into the bladder to a
pressure of 1250 PSI (87.5 BAR). This pressure will vary with each REED pump. Check the
specifications noted in MAINTENANCE SECTION, HYDRAULIC DESCRIPTION CHAPTER
of the appropriate manual. This dry nitrogen gas is inserted prior to installation of the
accumulator and is used to inflate the bladder much like a balloon.
REVISION: