Super Products MUD DOG, Operator'S Manual

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SAFETY
Super Products LLC Publication: 0004175 1
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1
Vacuum Relief Valve Safety
Vacuum Relief Valves
The in-line T-type vacuum relief valve is delivered with
the unit, and its operation is described in this procedure.
The unit will also have a remote-operated vacuum relief
valve. It consists of a hinged door that is opened and
closed by a pneumatic cylinder. The vacuum relief valve
is controlled by the operator at the front control panel or
by the wired and wireless pendant remote. Its operation
is also described in this section.
• Always use emergency T-type relief valve, except as
noted below.
• When safety person is used, make sure he/she is in
full view of person(s) at the end of vacuum hose.
• When working close to end of hose, wear tight-fitting
clothes. Keep shirts and jackets closed so that shirt
tails and jacket tails will not be pulled into end of
hose. Remove loose-fitting jewelry such as bracelets
and necklaces unless they are under tight-fitting
clothing.
• Do not use hand or foot to remove obstructions from
end of hose.
• Keep all body extremities and clothing from end of
hose.
• The only time the emergency T-type relief valve is
not required is when the operator is working vertically
off the boom hose. In this case only, the operator
should use the remote-operated relief valve. Failure
to comply with this requirement could cause bodily
injury, for which the manufacturer will not be
responsible.
Operating the T-Type Vacuum Relief
Valve

WARNING
1. With vacuum pump shut down, assemble T-type
vacuum relief valve into vacuum inlet tubing or hose.
The T-type vacuum relief valve should be kept as
close as possible to the person working at the end of
the vacuum hose (maximum of thirty feet away). If
there is more than one operator, there must be a
separate T-type valve for each operator.
2. Place a safety belt around the waist of the person
working at the end of the vacuum inlet hose.
3. Attach the end of the pull cord to the loop on the
safety belt. It is important to keep the pull cord as
short as possible. Depending on how far the person
with the safety belt is from the T-type vacuum relief
valve, it might be necessary to shorten the pull cord.
To shorten the pull cord (always keep pull cord swivel
snap attached to loop on safety belt), loop the pull
cord through the loop on the safety belt at the length
required and knot the loop. During operation, the pull
cord should be checked frequently (minimum of
every two hours) to see that it can be operated freely
and has not been damaged.

WARNING
4. When needed, the vacuum relief valve can be
opened by pulling on the pull cord, which will greatly
reduce the amount of vacuum at the end of the inlet
hose. To totally eliminate the vacuum at the end of
the inlet hose, the vacuum pump should be shut
down.
5. With the vacuum pump shut down and the truck’s
engine off, reset the vacuum relief valve by placing
the circular disk on top of the T-section.
6. When the relief valve is not being used, store it
properly to prevent damage.
Test the type T-type vacuum relief valve before
using to ensure proper relief operation and to
prevent injury or death.
If the person operating at the end of the vacuum
hose is in a confined space or cannot easily
reach the pull cord on their safety belt, there
must be a safety person(s) wearing a safety belt
with a pull cord attached who is in a position to
view the person(s) working at the end of the
vacuum hose.