160GR Natural Gas Booster Instruction Manual
Mayekawa all rights reserved. Subject to change without notice. Lat revised in October 2007
p.24
7.4.1.2 Inspection
a
)
Inspect the sliding surfaces of the mating ring and the seal ring. If the surfaces are
evenly worn, and the amount of the wear is not significant, they can be reused.
However, if the wear is not even, or if there is a peel on the surfaces, they can cause
the seal leak. Replace them with new parts.
b
)
Inspect the “O” ring. Basically, the “O” rings are expected to be replaced at every
inspection, for the “O” rings tend to be swollen, distorted, or hardened easily. The 3 “O”
rings used on the seal are for the seal retainer, for the seal ASSY, and for mating ring.
c
)
Examine the sliding surface of the oil seal of the sleeve for the oil seal. If it has been
worn down, replace both the oil seal and the sleeve. The oil seal is a special product.
Replace it with a genuine part.
d
)
Replace the seal cover gasket with a new one.
7.4.2 Unloader Cover
The seal for the under slide rod is installed in the unloader cover.
7.4.2.1 Disassembly
a
)
Place the Variable Vi support slide valve at the full-load position and remove the
Variable Vi plug (454-1) that is screwed onto the suction cover (5) or the main rotor
casing (1).
b
)
Turn the capacity control handle in the counter-clockwise to move the slide valve to
the unload position.
c
)
Pull out the hexagon socket head cap screw (24) that holds the unloader cylinder
cover (74) on the balance piston cover (22).