Specifications

158 SEBU7858-03
Maintenance Section
Hydraulic Tank Breaker Relief Valve - Clean
Type 1
g01124705
Illustration 216
The hydraulic oil sampling valve is located on top of
the return tube near the hydraulic tank.
Type 2
g01781733
Illustration 217
The h
ydraulic oil sampling valve is located on right
side of the hitch near the grease block.
Ref
er to Special Publication, SEBU6250, “Caterpillar
Machine Fluids Recommendations”, “S·O·S Oil
Analysis” for information that pertains to obtaining
asa
mple of hydraulic oil.
Refer to Special Publication, PEHP6001, “How To
Ta
ke A Good Oil Sample” for more information about
obtaining a sample of hydraulic oil.
i02503169
Hydraulic Ta nk Breaker Relief
Valve - Clean
SMCS Code: 5118-070
S/N: DBD1-Up
g011247
43
Illustration 218
The hydraulic tank breaker relief valve is located on
the top of the hydraulic tank near the hydraulic oil filler
cap. Th
e hydraulic tank breaker relief valve controls
the pressure in the tank and the vacuum in the tank.
1. Clean d
ebris from the breaker relief valve.
2. Turn the breaker relief valve counterclockwise in
order
to remove the breaker relief valve. Slowly
remove the breaker relief valve in order to relieve
pressure in the hydraulic tank.
3. Remove the retaining ring from the top of the
breaker relief valve.
4. Remove the metal cover that is under the retaining
ring. A filter is under the metal cover.
5. Wash the breaker relief valve and wash the filter
in a clean nonflammable solvent.
6. Dry the breaker relief valve. Dry the filter. Use
compressedairinordertospeedthedrying.
7. Inspect the filter for damage. If the filter is
damaged, replace the filter.
8. Inspect the O-ring that is between the filter and the
housing of the hydraulic tank breaker relief valve.
If
the O-ring is damaged, replace the O-ring.
9. Inspect the breaker relief valve for damage. If
t
he breaker relief valve is damaged, replace the
breaker relief valve.