Eaton RTX-12510, Service Manual

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Air Valve Operation
With the range control button up the control valve shuts off
With the control button down the control valve opens and
the air supply to the end cap. Thus, the constant air
supplies air to the end cap. Since the piston area is larger on
ing at the constant supply port forces the piston to the rear. this end of the piston, it is forced in the opposite direction.
The constant air also flows through a channel in the center
The external air port in the piston is now aligned with the
of the piston and to an external port which is aligned with
low range port of the air valve.
the high range port of the air valve.
C. Exploded view of value. The alignment sleeve not part of assembly, but must be housing for
proper operation.
The four O-rings are indicated by circled numbers. If any of these are defective, there will be a constant air leak out of the
exhaust on the air valve. In normal operation, exhaust will occur only for an instant as the range shift is made. The following
chart is to be used as a guide to determine defective O-rings.
Defective
O-Rings
RESULT
1 Constant leak through exhaust in low range only.
2 o r 3 Constant leak through exhaust in both ranges.
4 Constant leak through exhaust in high range; steady but low volume
leak through exhaust in low range.
To Disassemble Air Valve
1.
2.
3.
Turn out the two capscrews and remove the side cap 4.
from valve body.
Remove the valve insert from piston and remove O ring 5.
from the valve insert.
6.
Remove the spring from piston.
Turn end cap from valve body and withdraw piston from
bore.
Remove the two O-rings from piston.
Remove the nylon plug from piston and remove O-ring
from plug.
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