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Pressure Relief
Procedure
System pressure can cause the pump to cycle unex-
pectedly, which could result in serious injury from
splashing or moving parts.
1. Set START/STOP switch to STOP.
2. Push in SECURE DISABLE switch.
3. Open the back pressure regulator and all fluid drain
valves in the system, having a waste container
ready to catch drainage. Leave open until you are
ready to pressurize system again.
4. Check that pressure gauges on fluid supply and
return lines read zero. If gauges do not read zero,
determine cause and carefully relieve pressure by
VERY SLOWLY loosening a fitting. Clear obstruc-
tion before pressurizing system again.
Kit Parts
Slider Cylinder Rebuild Kit 15H874 includes parts
to rebuild one slider cylinder assembly. Order two
kits to rebuild both slider cylinder assemblies. Parts
included in the kit are marked with an asterisk, for
example (2*). Use all the new parts in the kit.
Ref.
No.
Part No. Description
2*
n/a
CYLINDER, slider
8*
n/a
BEARING, slider
15*
108683 NUT, lock, hex
16*
120351 GASKET, sanitary
31*
100664 SCREW, set, socket-head; 1/4-20 x
1/2 in. (13 mm)
41*
111316 O-RING; chemically resistant fluo-
roelastomer
Parts designated n/a are not available separately.
2
Kit Installation
Disassembly
1. Jog the motor to bring the lower on the side being
repaired to the bottom of its stroke. This provides
access to the coupling nut (14).
2. Relieve pressure, page 2.
3. See F
. 1. Place a 3/4 in. wrench on the slider pis-
IG
ton (9) flats (just above the coupling nut), to keep
the slider piston/connecting rod from turning when
you are loosening the coupling nut (14). Orient the
wrench so it is braced against one of the tie rods (3).
Applying excessive force to the slider piston/con-
necting rod can shorten the life of the lower pin
bearing.
4. Using a 1-5/8 in. open-end wrench, unscrew the
coupling nut (14) from the slider piston (9) and let it
slide down onto the pump piston rod. Be careful not
to lose the collars (13).
5. Shut off electrical power and allow the unit to cool.
10
Hold slider piston (9) flats with 3/4 in. wrench, and brace
against tie rod (3).
Qty
1
2
3
4
1
3
1
F
. 1. Remove Coupling Nut
IG
Pressure Relief Procedure
32
9
10
12
14
ti9223a
311599A
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