Repair; Replacement Of Valves; Replacement Of Piston, Cylinder And Stuffing Box; Replacement Of Snifter Valve Rubber Lip - Steffens WL Bedienungsanweisung

10. Repair

Before starting repair work, make sure that the
electricity supply has been switched off and the
system pressure has been released, if necessary.
When starting up the system again, make sure to
follow all the directions in sections 6. And 7.

10.1 Replacement of valves

Loosen the suction and discharge flanges, remove the pump air
chamber, replace the valves or the complete valve plate.
When reassembling the pump, make sure that the
valve plate and gaskets are in their proper
Caution
positions.
Note the notches on the side and the "TOP" text. Fit new gaskets
and clean the seal faces.

10.2 Replacement of piston, cylinder and stuffing box

WL 1002 - 2402

a. Dismantling:
Remove the cylinder cover and unscrew the piston from the
piston rod using a socket wrench. If the stuffing box is to be
replaced, the piston should normally be removed. Screw off
the cylinder with a special tool. The stuffing box can now be
loosened by means of a punch (brass or synthetic material)
and pressed out from the pump drive side towards the cylinder
cover.
b. Re-assembly:
Clean the pump housing and the sliding faces of the piston rod
for the packing rings. Fit a new stuffing box with gasket and
knock it into place using a pipe. Screw on the piston and refit
the cylinder cover.
WL 2502 - 3002, WL 4000 - 5000, WN 201 - 500
a. Dismantling:
Remove the cylinder cover and unscrew the piston from the
piston rod using a socket wrench. Screw off the cylinder and
remove the stuffing box housing. Replace the supporting ring
with seal ring, the piston rod guide ring and the stuffing box
packings. Clean the piston rod.
b. Re-assembly:
Fit the stuffing box housing. Fit the stuffing box housing gasket
and the cylinder and secure by screws. Screw on the piston
and refit the cylinder cover.

10.3 Replacement of snifter valve rubber lip

Standard valve:
– Release the pressure.
– Unscrew the snifter valve and blow through bore.
– Fit replacement lip.
– Do not forget the gasket!
Special valve:
– Release the pressure.
– Disconnect the hose.
– Unscrew special snifter valve and blow through bore.
– Fit replacement lip.
– Blow through hose (in order to remove any water) and
reconnect.

10.4 Air controller

Operational test:
1. Lack of air in tank: Holding a moist finger to the suction inlet,
check whether the running pump draws in air. If it does not
draw in air, this may be due to the following faults: Dirty
suction inlet; defective float; air controller stuck in closed
position; blocking of special snifter valve or rubber lip stuck.
2. Too much air in tank: Air controller piston stuck in open
position. Remove the air controller and make the air chamber
piston function.
3. Water leaking from air controller inlet: Replace the snifter
valve rubber lip.

10.5 Replacement of automatic pressure relief unit

Unscrew the unit using a special tool. Install a new, factory-set
valve. Note the cut-out pressure: red sleeve 4 bar, maximum cut-
out pressure is 3.5 bar; blue sleeve 6 bar, maximum cut-out
pressure is 5.5 bar.
The setting of the pressure relief unit must not be changed!

10.6 Replacement of V-belts

Remove the belt guard. Slacken the belt using the adjusting
screw on the motor base. Install a new V-belt and tighten. Refit
the belt guard.

11. Accessories

Air controller
Air controllers V/1 and VI/1 consist of valve, lever, chain,
corrosion-resistant float, hose and special snifter valve.
Air controllers V/2 and VI/2 consists of valve, lever and corrosion-
resistant float.
Inlet/
Air
Part no.
controller outlet
S5130443 V/1 G 1/2
96548888 VI/1 G 1 1/4
S5130460 V/ G 1/2
2
96548889 VI/2 G 1 1/4
Tools for piston pumps
Pump type Special key for
pressure relief
unit
WL 1002 96590288
WL 1502 96590288
WL 2002 96590288
WL 2402 96590288
WL 2502 96590288
WL 3002 96590288
WL 4000 -
WL 5000 -
WN 201 96590288
WN 301 96590288
WN 500 -

12. Warranty

These products are subject to the warranty clause of our general
terms and conditions of delivery.We shall, however, not be liable
for any damage resulting from faulty installation, electrical
connection or application nor for any consequent damage.

13. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact Steffens Pumpen-Fachhandel GmbH.
For vertical pressure tank
for air supply for air release
Accord. to DIN
-
4810 old
Accord. to DIN
-
4810 new
Accord. to DIN
-
4810 old
Accord. to DIN
-
4810 new
Part no. key Key for
for cylinder supporting
removal ring
S5550329
S5550310
S5550299
S5550264
S5548820 S9548782
S5548820 S9548782
S5548839 S9548782
S5548839 S9548782
S5548820 S9548782
S5548928 S9548782
S5548855 S9548782
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