This video will cover how to replace the Inlet and discharge valves along with the pistons, seals and guides on the Annovi Reverberi RTX30.500N plunger pump repair and maintenance.
0:29 Discharge Valves
2:16 Inlet Valves
3:33 Water Seals
Find the Annovi Reverberi RTX RTX30.500N plunger pumps breakouts here:
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Service Dealers (buy parts here):
These are the tools used in the video to repair the machine
Here are the kits and their parts numbers needed to service the pump
To replace the 3 discharge valves on the top of this pump, remove the valve caps on the manifold with a 24mm socket
Next, using a pair of needle nose or valve pliers remove the valves by grabbing the plastic valve cage while twisting and pulling straight out
Make sure to clean the thread sealer off of the plugs and the ports for your valves to prevent damage when reassembling it
Put in the new valves and make sure they are properly seated
Its ok to use something that you have a firm grip on and that will not damage the inside of your pump to make sure they are in all the way
Make sure the backup ring is correctly fitted in the groove of your valve cap to prevent damaging it when putting the caps back on
Apply a thin layer of thread sealer all the way around the threads when reinstalling the valve caps
Make sure to torque the caps to 531 Inch pounds or 44 foot pounds before the adhesive dries
Never use the airgun when re-assembling your machine because this can lead to injury to you or damage to your pump
To access the inlet valves, pistons, seals and their guides start by removing the 12 head bolts with a 6 MM allen socket.
Watch out for this small o ring that could fall out during servicing, without it. Your pump will end up leaking.
To remove the valves start by taking off the o rings near the valve. Be cautious not to pierce your o rings or they will have to be replaced.
Now you can take a pair of valve pliers to twist and pull the valve straight out
If you are not replacing your valves check the springs to make sure they are functioning properly
Then you can put the valves back into place, followed by the oring
To access the other components in the head remove the 8 other headbolts with an 8mm allen socket
To take off the head, rotate the crankshaft with a wrench to help push it off of the pistons
This allows enough space to evenly pry off the head with 2 screwdrivers on opposite side of the pump
After that, support the bottom of the head and push off with your thumbs
Be careful not to apply too much pressure to one side of the head because this can crack the ceramic pistons
Once the manifold is off there will be parts either on the pistons or still in the head of the machine.
To remove parts off of the pistons start by using a wrench or your hand to rotate the crankshaft, this will push the parts towards the end of the piston making them easier to twist off.
To take the rear piston guides and flow-pressure seal out of the head the best method is to use a pair of channel lock pliers to twist and pull them out
Next, take out the front piston guide
If the high pressure seals can’t be taken out by hand, use a small flathead screwdriver to pry them out without scratching the inside of the pump.
The first item to go into the manifold will be the head ring with the flat side facing down
Next comes the high pressure seal, its concave side should fit over the support ring
New seals are tough to fit in, make sure to work them in at an angle and to only use your hands
The brown backup ring should then fit on top of that
The front piston guide comes next with its smaller side going into the head
To put the rear piston guide in first replace the o ring on the outside, then place in the brown backup ring into it
The low pressure seal goes on top of the backup ring with its concave sticking out of the guide
The small support ring will fit into the seal with its curved side down, make sure to put a small amount of grease onto the ring so that it stays into the seal when you put the guide back into the head
If the guide is put in squarely it should click into place
If you are not putting on new pistons, you can use a knife to remove debris on the piston
Scrubing and wiping them off is also important to do.
To replace the pistons, remove the piston bolt using a 13mm socket.
Take off the brass plate in any fashion that does not end up bending it out of shape
Again, make sure to clean off any thread sealant from the bolts before putting them back in
If you are not replacing the pistons make sure to scrape off any residue that has accumulated on the outside
Once they have been thoroughly cleaned you can put the copper plate and the piston back on
There is a small o ring hidden in the piston bolt, make sure to inspect this to ensure it hasnt been damaged
apply a small amount of threadlocker all the way around the bottom on the piston bolt before retightening them
Torque the piston bolts to 177 inch pounds
To properly put on the manifold turn the crankshaft so that the outer pistons are even
This helps with pushing the head back on squarely
New seals may be tight, so you can use a soft faced hammer to evenly tap it into place while supporting it
These head bolts should be torqued to 442 inch pounds or 37 foot pounds
Torquing in a criss cross manner can help evenly tighten the head onto the pump
Dont accidentily install the inlet manifold on upside down. The words in should be the right way up when put on right
Do not remove these, they are machining ports.
As always if you have any questions about the Annovi Reverberi RTX RTX30.500N plunger pump feel free to contact us.