REED 00 C50SS, Manual, Page: 75 / 84

REED
00 MODEL:
C50SS
TRAILER CONCRETE PUMP
MAINT
PAGE 45
In operation of the accumulator in the hydraulic system, hydraulic fluid enters the accumulator
through the fluid port and fills the area at the bottom between the inner wall of the shell and
bladder. The hydraulic fluid enters at a higher pressure, 2500 PSI (175 BAR) than the gas
pressure inside the bladder. At the appropriate time in the pump cycle, the unloading valve of
the shift circuit opens, allowing the fluid in the accumulator to be discharged and is directed to
the shift cylinder. As soon as the fluid is dispersed the accumulator is refilled. This cycle is
repeated time after time.
The accumulator is a critical component in the pump operation and at some point in time it will
be necessary to service the accumulator which might involve recharging with nitrogen,
maintenance or bladder replacement. The following is offered to assist you in accomplishing
this repair.
The hydraulic accumulator is PRESSURIZED VESSEL
and only QUALIFIED TECHNICIANS should perform
the necessary repairs. Always drain the fluid
COMPLETELY from the accumulator before
performing any work on the component.
We recommend the following special tools to be on hand to facilitate any work being done on
the accumulator:
REVISION: