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WM and WMR Series

High Pressure Pump Service

Rainman Technology Pty Ltd

#17 / 10-18 Orchard Road

Brookvale, NSW 2100

Australia

www.rainmandesal.com

[email protected]

+61 433 826 626

Version 1.1

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Summary of Contents for WM Series

Page 1: ...WM and WMR Series High Pressure Pump Service Rainman Technology Pty Ltd 17 10 18 Orchard Road Brookvale NSW 2100 Australia www rainmandesal com support rainmandesal com 61 433 826 626 Version 1 1...

Page 2: ...iption 1 Routine Pump Maintenance 2 Oil Change 2 Preventing Cavitation 2 Replacing the Valves 3 Overview 3 Procedure 4 Replacing the Packings 6 Overview 6 Procedure 7 Setting Relief Valve 12 Troublesh...

Page 3: ...ls of maintenance on more heavily used systems Depending on which Rainman watermaker model you own there will be one of two different high pressure pumps in your system If you have the older Mk1 elect...

Page 4: ...rating pressure and flow rates so the oil break down is slower than normal operation for this design As such it is not critical to maintain high discipline on this oil change schedule The method to ch...

Page 5: ...ed into the cylinder by the lift pump as the piston retracts The second valve opens as the piston forces the water under high pressure through the manifold O rings are used to seal around the valves O...

Page 6: ...ve cap Examine threads and O ring Replace O ring item 1 if there is any evidence of cuts abrasions distortion or wear 2 Remove valve assembly item 2 from valve cavity 3 Remove valve seat O ring item 3...

Page 7: ...p Servicing Instructions Page 5 6 Insert valve assembly item 2 into valve cap as shown 7 Coat the threads of the valve cap with anti seize grease such as Renolit ST 80 and reinstall valve cap Torque t...

Page 8: ...t from leaking out of the pump along the pistons The hard high pressure seals contain the pressure within the manifold of the pump but some moisture slides out with the piston on each stroke The softe...

Page 9: ...ut them on before proceeding Glyd high pressure seal item 5 in diagram Square high pressure seal item 6 in diagram Procedure 1 Remove head bolts using a 5mm Allen key and slide manifold away from the...

Page 10: ...a slight rocking motion Since they are being replaced damage to the old packings is inconsequential Important take care not to score or mark the manifold s machined surfaces 4 Remove high pressure se...

Page 11: ...anifold cylinder Do not grease any portion of the packing assembly during this step 8 Gently place assembled glyd rings items 5 6 inside insertion guide item 8 so they are resting evenly 9 Insert push...

Page 12: ...3 4 ensuring recess for seal is facing upwards 11 Gently place low pressure seal item 2 into the guide item 7 ensuring the open spring side of the seal is facing toward the casing and resting evenly 1...

Page 13: ...casing itself 14 Check that spacer rings item 1 are on each plunger as per photo These rings are non wearing so it is not required to replace them Apply a very thin coating of silicone grease to each...

Page 14: ...limiting the maximum output pressure of the PSU to approximately 69 bar 1000 psi All relief valves are set in the Rainman factory during final testing of each system In the highly unlikely event that...

Page 15: ...kwise until it is fully closed whilst watching the pressure on the gauge New relief valves from the factory are typically pre set to a low pressure so you should be able to close the valve fully befor...

Page 16: ...hooting The troubleshooting table is highly technical and specific only to the high pressure pump not your Rainman watermaker in general In the vast majority of operational troubleshooting issues you...

Page 17: ...High Pressure Pump Servicing Instructions Page 15 Maintenance Log...

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