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Operating Instructions
4
A valve that has not been operated for a number of years
needs to be closed by using a series of up and down mo-
tions. Crews attempting to close a dicult valve should
never use a T-handle and cheater bar to force the valve
closed. Exceeding manufacturers recommended torque
values to obtain a positive shutoff can cause damage to the
valve. Torque-limiting devices are available. Crews should
follow these guidelines to close a valve properly:
1. Begin with a steady amount of torque in
the direction necessary to close the valve,
moving through 5 to 10 rotations.
2. Reverse for two or three rotations.
3. Reverse again and rotate 5 to 10 more
turns in the closing direction.
4. Repeat this procedure until full closure is
attained.
5. Once the valve is fully closed, it should be
opened a few turns so that high-velocity
water flowing under the gates can move
the remainder of the sediment down-
stream with more force and clear the bot-
tom part of the valve body for seating.
6. Fully close the valve again.
The reason for this cautious approach is that debris and
sediment often build up on the gates, stem, and slides. If
this material is compacted while the valve is being closed,
the torque required to close the valve continues to build as
the material is loaded. If the procedure described above is
used, the stem and other parts are “scrubbed” by the series
of back-and-forth motions, and water in the system can ush
the debris that has broken loose away from the stem gate
and slides or guides.
• Slowly operate valve lever to begin opera-
tion in the required direction to open or
close valve.
Situations may vary; it is impossible to list all Hazards.
Stay alert. Be aware. YOU can help or prevent accidents
• Before any operation of Spin Doctor, be
familiar with the locations and functions of
the unit’s instruments and controls. Being
familiar with the machine and its controls
will increase eciency and reduce the pos-
sibility of personal injury or damage to the
unit. The operator should work slowly and
carefully until he or she feels comfortable
with the machine. Speed and skill will be
attained much easier if the necessary time
is spent to familiarize the operator with the
machine and its operations.
• Always check engine oil level and hydrau-
lic oil level in reservoir prior to starting
engine.
• Attach hydraulic boom hoses to the power
pack, making sure they are correctly con-
nected and coupler is locked.
• Remove position lock pins from boom to
allow boom to extend and swivel.
• Start power pac engine. (See engine
owner’s manual for operating instructions)
• Insert extension key attaching to valve nut.
(Valve manufacturers recommend the first
and last turn be done by hand).
• Insert hydraulic motor drive into valve
extension wrench.
AMERICAN WATER WORKS RECOMMENDED VALVE MAIN-
TENANCE PROCEDURES:
Operation and maintenance procedures for various types
of valves are detailed in manufacturer’s operation manuals
and in the appropriate product standards. The following
paragraphs provide the guidelines for most situations.
Basic Valve Exercising
Preparing for your valve exercising activities will require some planning. You will need to assemble maps that will give you
the location of each valve, type of valve and the size of the valve. You will need to know the type of access to the valve so you
come prepared with the right tools to open the access point. If you are working in a street, especially a busy main street, you
will need trac control. Refer to your local and state requirements for trac control.
Operating Instructions
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