Hyundai r35z-7 Workshop Manual page 191

3) CAVITATION OCCURS WITH PUMP
NO
Is hydraulic oil
volume proper?
Is not viscosity
of hydraulic oil
YES
too high?
4) HYDRAULIC OIL IS CONTAMINATED
YES
Has not hydraulic
oil passed
specified replace-
ment hours?
Has return filter
been replaced at
NO
proper intervals?
YES
YES
Is not suction
strainer clogged?
NO
NO
NO
5-8
Is not air intruding
from pump
suction line?
Cause Remedy
Replenish
specified oil to
the standard
level.
Replace oil with
one of proper
viscosity.
Clean suction
strainer.
Check for air
intrusion in
suction line and
retighten or
replace parts.
Cause Remedy
Replace
hydraulic oil to be
specified.
Flush with
hydraulic oil and
replace return
filter.