Ranpump B15-PVX, Руководство по эксплуатации и техническому обслуживанию

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15
7.2. Changing diaphragm
Tools Required
- Lithium-base grease (non-freezing silicone grease)
- 13 mm wrench
- 5 mm allen key
- 10 mm wrench
- Torque wrench
1-
Relieve the pressure.
2- Remove the manifolds and disassemble the ball check valves as explained in Ball Check
Valve Repair section.
3- Using a 5 mm allen key, remove the bolts holding the fluid covers to the main covers. Pull the
fluid covers off the pump.
4- Loosen both the diaphragm shaft bolts using a 13 mm wrench, and remove one bolt but not
both.
5- Remove o-
ring, Teflon® diaphragm (if applicable) and rubber diaphragm.
6- Pull the other diaphragm assembly and the diaphragm shaft out of the center housing. Hold
the shaft with a 13 mm open
–end wrench, and remove the bolt from the shaft.
7- Disassemble the remaining diaphragm assembly.
8- Inspect the diaphragm shaft for wear or scratches. If it is damaged, inspect the bearings in
place.
9- Remove the tap which holds the pilot shaft and diaphragm shaft.
10- Clean all parts and inspect for wear or damage.
11- There is text on the air side of the diaphragm.
12- Grease the diaphragm shaft lightly.
13- In the Teflon Diaphragmed pumps, Rubber diaphragm is protected by putting a teflon
diaphragm to the side that meets the fluid.
14- Re-assemble the parts in reverse order.
15- Tighten the screws applying the proper torque from the torque chart. (Fig. 6)
Figure 11- Diaphragm change
WARNING!
Transferred liquid enters the air chamber of the pump when the
diaphragm ruptures. Liquid can damage the pilot valve o-rings and
the air valve o-rings due to its chemical behaviour. For this reason
you must check and replace (if needed) the o-rings while you are
changing the diaphragm. If only the diaphragm is changed that will
not constitute good maintenance and you can have a pump
problem soon.