Graco 15H874 User Manual

Instructions
15H874 Slider Cylinder Rebuild Kit
To rebuild one slider cylinder assembly on E-Flo® Electric Circulation Pumps. For professional use only.
Important Safety Instructions
Read all warnings and instructions in this manual and in E-Flo Repair-Parts manual 311594. Save these instructions.
311599C
ENG
ti8317b

Pressure Relief Procedure

Pressure Relief Procedure
System pressure can cause the pump to cycle unex­pectedly, 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 obstruc­tion before pressurizing system again.

Kit Parts

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
4. Using a 1-5/8 in. open-end wrench, unscrew the
5. Shut off electrical power and allow the unit to cool.
IG. 1. Place a 3/4 in. wrench on the slider pis-
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/con­necting rod can shorten the life of the lower pin bearing.
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).
NOTE: 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 Qty
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.
10
Hold slider piston (9) flats with 3/4 in. wrench, and brace against tie rod (3).
1 2 3 4 1
3
1
FIG. 1. Remove Coupling Nut
32
9
10
14
12
ti9223b
2 311599C
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