Air Motor Identification - Signode TENSION-WELD VXL-2000-Z Operation, Parts And Safety Manual

AIR LOGIC AND DIAGRAM (AIR MOTOR N20R38VA)
SEQUENCE OF OPERATION
1. Tool at Rest - Air flows through the pilot valve, throttle valve and stops at the air valve. Air
also flows to the 3-way valve.
2. Motor control lever is depressed, initiating the tensioning portion of the cycle. Air flows
through the pilot valve, throttle valve (used to control strap tension) and the air valve to the
rotor/cylinder section of the air motor, causing the air motor to turn. The motor runs until it
stalls when strap tension has been reached. Air also flows to and stops at the 3-way valve.
3. The weld handle is
pulled back, initiating
the welding cycle. Air
is directed to the
throttle valve (opening
it fully allowing full air
motor performance)
flows through the pilot
valve and the air valve
to the rotor/cylinder
section of the air
motor. Additionally,
the act of pulling the
weld handle back
mechanically
disconnects the motor
from the tensioning
mechanism so the air
motor starts running again. Air flows through the 3-way valve, the flow control and enters the
volume chamber. When sufficient pressure has built up in the volume chamber the pilot valve
will actuate and shut off the air flow to the air valve and the rotor/cylinder. The air motor then
stops.
4. The motor lever and weld handle are released and the tool returns to the "at rest"
configuration, with air being routed through the pilot valve, throttle valve and stopping at the
air valve.
VXL/VXM AIR MOTOR IDENTIFICATION
There are two air motors (N20R38V or N20R38V) available to VXL/VXM tools. Use the information
below to determine the correct air motor for your tool before ordering any replacement parts. Air
motors can be identified by the presence of the part number (423150 or 422550) engraved or
stamped on the underside of the motor housing.
20R38V (P/N 273830)
NOTE: Air motor 20R38V is an older style air motor used on VXL/VXM tools. Air motor 20R38V can
be identified by the absence of a part number engraved or stamped on the underside of the motor
housing.
N20R38V (P/N 423150)
21
N20R38VA (P/N 422550)