Komatsu 830E-AC Shop Manual page 575

Cleaning and Inspection
1. All metal parts should be cleaned with a clean-
ing agent.
2. Seals and soft parts should be wiped clean.
3. Inflate bladder to normal size. Wash bladder
with a soap solution. If soap solution bubbles,
discard bladder. After testing, deflate bladder
immediately.
4. Inspect assembly for damage; check the poppet
plunger to see that it spins freely and functions
properly.
5. Check anti-extrusion ring and soft seals for
damage and wear; replace all worn or damaged
seals with original equipment seals.
6. After shell has been cleaned with a cleansing
agent, check the inside and outside of shell.
Special attention should be given to the area
where the gas valve and hydraulic assembly
pass through the shell. Any nicks or damages in
this area could destroy the accumulator bladder
or damage new seals. If this area is pitted con-
sult your Komatsu Service Manager.
Assembly
Assemble the accumulator in a dust and lint free
area. Maintain complete cleanliness during
assembly to prevent possible contamination.
1. After shell has been cleaned and inspected,
place accumulator shell in vise or on table.
2. Thoroughly coat the inside of the accumulator
shell with a liberal amount of clean hydraulic oil
to lubricate and cushion the bladder. Make sure
the entire internal of the shell is lubricated.
3. With bladder assembly on bench, expel all air to
completely collapse bladder and fold bladder
longitudinally into a compact roll. To maintain
rolled condition of bladder, install gas valve core
into the valve stem, thereby preventing air from
entering the bladder.
4. Attach bladder pull rod to bladder valve stem.
5. Pass bladder pull rod through shell oil port and
out through valve stem opening. (Refer to Fig-
ure 3-18).
J03034
6. Pull bladder pull rod out of shell with one hand
while feeding bladder into shell with other hand.
7. Position name plate over valve stem and install
valve stem nut by hand (Figure 3-19). Remove
bladder pull rod.
8. Hold bladder valve stem on the flats with a
wrench and tighten nut (5) securely.
FIGURE 3-19. VALVE STEM INSTALLATION
9. Grasp threaded section of plug and insert pop-
pet end into shell mouth
10. Install anti-extrusion ring inside shell. Fold anti-
extrusion ring to enable insertion into shell.
Place anti-extrusion ring on plug and poppet
assembly with its steel collar toward shell
mouth.
Brake Circuit Component Service
FIGURE 3-18. BLADDER INSTALLATION
J3-21