BIRO VTS-41, Operations Manual & Parts List, Page: 17 / 28

15
VTS-41
VT418 OR VT479S
EXTERNAL PUMP
with TOGGLE SWITCH
VTS-42
VTS7162 OR VTS7162-50
INTERNAL PUMP
w/out TOGGLE SWITCH
NO. VT611S
SERVICE REPAIR KIT
WARNING: To prevent explosive hazard, Do NOT pump combustible liquids or vapors with these units. Per-
sonal Injury and/or Property Damage would result.
To clean or replace the internal filters and/or rubber gasket, remove the five screws in the top of the unit. The filters
and gasket are located beneath this top plate. Remove the filters and wash them in solvent and/or blow off with air or
replace. The gasket may be cleaned with water. Replace the filters in proper position and replace the gasket. Note that
the gasket and top plate will fit in one position only.
To replace the diaphram, remove the socket cap screws from the head of the pump. The diaphram is held in place by
two phillips head screws. Remove screws, retainer plate and the diaphram. The diaphram will fit in any position on
the connecting rod. Replace the plate and the two phillips head screws. Torque to 30 inch-pounds.
CAUTION: Do not raise any burrs or nicks on the heads of these screws. These burrs could cause damage to
the inlet valve.
For replacing the inlet and the outlet valve, remove the slotted machine screw that holds each valve in place. The
stainless steel inlet and outlet valves are interchangeable* Clean them with water. When replacing the outlet valve,
place the new valve in location and note there is a retaining bar near the machine screw hole. The retaining bar holds
the valve in position. When replacing the inlet valve, note that the valve holder is marked with an X in one corner.
This X should be in the lower right hand corner toward the inlet of the air chamber. Replace the head and tighten the
socket head screws, to 90-100 inch-pounds of torque.
WARNING: The motor may be thermally protected and can automatically restart when the overload resets.
Always disconnect power source before servicing. Personal Injury and/or Property Damage could result.
Do not attempt to replace the connecting rod or motor bearings. If after cleaning the unit and/or installing a new
Service Kit, the unit still does not operate properly, contact your representative, the factory, or return the pump to one
of our authorized Service Centers.
IF YOUR PUMP IS EQUIPPED WITH PLASTIC PLUGS IN THE EXHAUST AND/OR INTAKE PORTS,
REMOVE BEFORE STARTING THE UNIT.
OPERATING AND MAINTENANCE INSTRUCTIONS.
Do not at any time lubricate any of the parts with oil, grease, or petroleum products nor clean with acids, caustics or
chlorinated solvents. Be very careful to keep the diaphram from contacting any petroleum product or hydro carbons. It
can affect the service life of the pump.