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TM 10-3930-644-14&P
Figure 30. Power Steering Cylinder Components
lubricate  with  hydraulic  oil  and  do  not
3. Use only approved packing.
Never make
overstretch when sliding over edge of packing
substitutions.
gland.
4. Before installing, inspect for nicks, cuts or flaws.
4. When replacing plunger packing seal, remove
Do not install If any of these faults are present.
items in Steps 1 and 2 in this paragraph, and
then withdraw complete piston and plunger
5. All metal surfaces on which packing slides
assembly from cylinder tube.
should be very smooth. If surfaces are scored
or nicked, replace the parts or resurface them.
CAUTION
6. Soak packing in hydraulic oil before installing.
Do not attempt to remove piston from
plunger rod. They do not separate.
7. Sharp tools or Instruments should not be used
5. Remove bearing and packing from piston.
when Installing packing.
6. Thoroughly check cylinder bore for score marks
8. When installing seal rings do not stretch them
or nicks.
These cause damage to piston
more than absolutely necessary.
packing cups.
9. Fit packing evenly and snugly without using
C. CYLINDER REPAIR
undue force.
1. When packing starts to wear, renew it, otherwise
10. When packing must be installed over threads or
parts of the packing will contaminate the oil and
sharp edges, use shim stock to protect packing.
work into the pump or valve, thus causing
damage, or malfunction.
a. O-rings should be pushed over sharp
edges with care. They can be easily cut.
2. Do not disassemble the unit any more than is
required to replace the faulty packing.
3-172

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