Ranpump RAN 3" G80-AX, Руководство по эксплуатации и техническому обслуживанию

Страница: 15 / 24

15
7.2. Changing diaphragm
Tools Required
- Lithium-base grease (non-freezing silicone grease)
- 17 mm wrench
- 15 mm wrench
- 32 mm wrench
- torque wrench
- Philips-head screwdriver
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 17 mm wrench, 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 32 mm wrench, and remove one bolt but not
both.
5- Remove o-ring, PTFE diaphragm (if there is) and rubber diaphragm.
6- Pull the other diaphragm assembly and the diaphragm shaft out of the center housing. Hold
the shaft with a 32 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 PTFE Diaphragmed pumps, the rubber diaphragm is protected by putting the PTFE
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. 7)
Figure 12 - Diaphragm change
WARNING!
Transferred liquid goes into air chamber of 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 be correct
maintenance and you can have a pump problem quickly.