DMF ROTO-180, Installation And Parts & Service Manual

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DIVERSIFIED METAL FABRICATORS, INC. ROTO 180
© 2017 DMF, Inc. All Rights Reserved. 3-7
2. With the PTO running use a small screwdriver to press the override located at
center of each spool on the far end.
• If the body swings or the tailgate opens in both directions there is no
obstruction within the manifold and the solenoid valve assembly should be
replaced. Test this by removing the problematic coil and replacing it with
a working one. The solenoids valves are the same for the swing and
tailgate operations.
• If the body does not swing or the tailgate does not open there is an issue
with either the valve, an obstruction within the flow control or an internal
issue with the manifold. Continue on to the next section.
E. Replace problematic solenoid valve with a working solenoid valve.
1. The solenoid valves are the same for the swing and tailgate operations.
2. Replace the problematic solenoid valve with the working valve from the other
manifold function and test its operation.
• If it operates correctly the solenoid valve on the problematic function
needs replacing.
• If the operation does not work there is an obstruction within the manifold
or the flow control. Contact DMF for additional assistance.
Tailgate is not automatically opening or dump body height is not limited
A. Address common issues, see Section 3.3.1.
B. Verify tailgate cylinder is operating properly.
1. With the dump body lowered and empty, operate the tailgate in both directions.
Note the direction of the cylinder during both movements.
• If the cylinder does not move or moves in the opposite direction there is a
hydraulics issue, reference hydraulic troubleshooting Section 3.3.3.
C. Tailgate is not closing properly.
1. Verify latch is properly being closed. Ensure tailgate has closed properly and is
restrained by the tailgate latch.
2. The dump body must be lowered fully before latching the tailgate.
D. Tailgate and height sensors are no longer working.
1. Locate tailgate and height proximity sensors and enable the system.
2. All three sensors will remain illuminated when in range of a ferrous metal object
and turn off when not. Verify that all are working properly. When the dump
body is lowered, the two height sensors will be illuminated. When the tailgate
has been released the tailgate sensor will become illuminated.
3. Release the tailgate and make sure the sensor turns on.
4. Raise the dump body. When the body reaches 22° one of the height sensors
should turn off and the tailgate should release.
5. The other sensor should turn off at approximately 40°. Do not overextend the
hoist cylinder.
• If any of the sensors do not turn off, check to make sure they are
positioned correctly.
• If the sensors do not turn on when tested check the wire connection
following Section 3.3.4.
• If the sensors turn off as expected but the tailgate does not open
automatically or the body doesn’t stop when reaching max height there is
an issue with one of the sensor relays found behind the toggle switches or
a broken wire. Replace as needed.
Dump body not moving in intended direction
A. If the dump body swings opposite of the intended direction, there is an issue with either
the wiring or the hydraulics. Reference the hydraulic troubleshooting in Section 3.3.3.