accumulator to assist in lifting accumulator from above.
4-128. Hydraulic Reservoir Cap and Screen
Remove accumulator by lifting up and outward from
a. Removal. Remove hydraulic reservoir cap and
lower support bracket.
screen.
b. Cleaning and Inspection.
(1) Clean cap and screen with an approved
CAUTION
solvent.
Use care not to damage valve stem guard
(2) Inspect cap and screen for defects. Replace
or valve stem.
a defective cap or screen.
c. Installation. Install hydraulic reservoir cap and
WARNING
screen.
Do not drop.
c. Cleaning and Inspection.
4-129. Accumulator
(1) Wipe exterior of accumulator with a damp
a. General.
The
accumulator
weights
cloth.
approximately 130 pounds. The low side is pressurized
(2) Inspect for cracks, or other defects. Replace
to 800 psi with nitrogen. This pressure will not be
defective accumulator.
relieved when the upper hydraulic line is disconnected.
d. Installation.
The pressurized nitrogen acts as a cushion when the
(1) Attach a rope to accumulator's bracket and
hydraulic system's fluid pressure is against the
install accumulator as illustrated in figure 4-118.
accumulator piston. To recharge the accumulator, refer
to direct support maintenance.
CAUTION
b. Removal
Use care not to damage valve stem guard
(1) Relieve hydraulic system pressure by
or valve stem.
operating the dozer and outrigger controls (6, 7, 8, 9 and
WARNING
14, fig. 2-14) until pressure has been relieved.
Do not drop.
(2) Remove oil filter located directly forward of
accumulator.
(2) Remove rope from bracket.
(3) Remove accumulator as illustrated in figure
(3) Install oil filter.
4-118. Attach a rope through bracket attached to the
Section XXVI. AIR SYSTEM
(2) Remove screws and clamps securing hoses
4-130. General
and lines.
The carrier engine is equipped with an air compressor
(3) Disconnect and remove the hoses and lines
that supplies air pressure to operate air brakes,
from valves, brake chambers, and air compressor.
emergency braking system, windshield wiper, air horn,
Refer to the carrier air brake system piping diagram.
and fan drive clutch. Governors and safety valves
b. Cleaning and Inspection.
protect the system from excess pressure. Filters and
(1) Clean all parts and dry thoroughly.
strainers trap and contain any moisture or dirt in the air
(2) Inspect for cracks, damaged threads,
system.
deterioration, or other defects.
NOTE
(3) Replace all defective lines, hoses, and
Relieve pressure from system before
fittings.
removing any part of it.
c. Installation. Install and connect all lines, hoses
and fittings to compressor, valves and brake chambers
4-131. Air Lines, Hoses, and Fittings
(Refer to fig. 4-119 for model 2380 or fig. 4-120 for
a. Removal.
model 2385).
(1)
Drain
pressure
from
-
System..
4-122
