Table 25 (Continued)
Check through one valve operation cycle.
Piston rod and
Oil packing; tighten packing gland if
leakage exists; replace packing if
Check for water flow when valve is wide
open and shut; if leakage occurs,
disassemble valve and piston, check
leathers for wear and replace as
Disassemble; inspect for scoring and
corrosion; check cup leathers; polish any
scored areas; remove corrosion products
from piston surfaces and cylinder heads.
Check packing and air hose; lubricate as
Check piston, cylinder, and leathers; clean
and maintain similar to hydraulic valve
Operate valve and check for tight closing.
Change gear drive lubricant.
after 500 hours
Maintain electric motors as described in