jurop LC 420 - User Manual

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LC

Rev. 12

10-12-2021

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Table of Contents

Other manuals for jurop LC 420

Original Instruction32 pages

Instructions For Installation, Use And Maintenance Manual32 pages

Questions and Answers

S
Shawn ValentineAug 14, 2025
Why is my Jurop Water Pump overheating?
- M
  Mr. Paul BrownAug 14, 2025
  If your Jurop Water Pump is overheating, several factors could be the cause. It might be due to insufficient or absent lubrication, in which case you should verify the oil and rings and check the oil pump efficiency. Another reason could be a low tank oil level, so ensure you fill the tank with oil. Excessive rotation speed or prolonged functioning at max vacuum rate can also lead to overheating; reduce the RPM to the prescribed working speed or reduce the vacuum rate. Insufficient cooling can be another cause, so check the oil pump efficiency, bleed the system with care, and check the heat exchanger efficiency. Lastly, check the dimensioning of the vacuum and/or exhaust line if it is of insufficient diameter.
D
Dr. Donna HillAug 21, 2025
How to fix a jurop LC 420 Water Pump that does not rotate?
- C
  Christine KellerAug 21, 2025
  If your Jurop Water Pump does not rotate, there are several possible reasons. Broken vanes due to infiltrated solids could be the cause; in this case, clean the inner chambers and replace the vanes. Another cause might be insufficient lubrication, so check the oil pump. A power transmission breakdown could also be the reason; check and replace any damaged parts. Lastly, ice inside the pump during the cold season can prevent rotation; remove the ice and slowly start running the pump, avoiding suction of water.
L
Leah GonzalesAug 25, 2025
Why does my jurop LC 420 have unusual oil consumption?
- S
  Samantha StuartAug 25, 2025
  Unusual oil consumption in your Jurop Water Pump can be attributed to insufficient or absent lubrication. To resolve this, check and adjust the lubricating pump.
E
Erik RosalesAug 28, 2025
What to do if the non-return valve leaks in my Jurop Water Pump?
- S
  Scott LopezAug 28, 2025
  The non-return valve of your Jurop Water Pump might be leaking due to several reasons. It could be caused by worn seal rings, leaking tank gate valves or gaskets, leaking or obstructed tank connection pipes, an obstructed primary shutoff or suction filter, an encrusted exhaust port, vacuum line components that are too small, or obstructed rubber couplings. To resolve this, replace worn seal rings, replace damaged or worn tank parts, replace damaged pipes, remove and clean obstructions from the primary shutoff or suction filter, remove and clean the exhaust port, verify the dimensions of vacuum line components for maximum pump performance, and replace obstructed rubber couplings.
M
Marie BellSep 1, 2025
What to do if my Jurop Water Pump does not rotate?
- T
  Terri RaySep 1, 2025
  If your Jurop Water Pump isn't rotating, it could be due to broken vanes (possibly from infiltrated solids or insufficient lubrication), a power transmission breakdown, or ice inside the pump during cold weather. Try cleaning the inside chambers and replacing the vanes, checking the secondary shutoff and filters of the suction line, or checking the oil pump. Inspect and replace any damaged parts of the power transmission. If there's ice, remove it and start the pump slowly, avoiding water suction.
G
Gary MccannSep 5, 2025
How to fix performance loss in a Jurop Water Pump?
- A
  Amanda WoodsSep 5, 2025
  If you're experiencing performance loss with your Jurop Water Pump, it might be because the four-way changeover valve is in the idle position; move the lever to vacuum or pressure mode. Another cause could be worn vanes, so replace them.
T
Tamara McbrideSep 9, 2025
Why is there unusual oil consumption in my Jurop Water Pump?
- D
  Deborah BoltonSep 9, 2025
  Unusual oil consumption in your Jurop Water Pump can be caused by insufficient or absent lubrication. To address this, check and adjust the lubricating pump.
J
joshuacooperNov 16, 2025
What to do if my jurop LC 420 Water Pump has reduced performances?
- P
  pmorrisNov 17, 2025
  If your Jurop Water Pump experiences reduced performances, several factors could be the cause. Start by checking the four-way changeover valve position; it should be moved to the vacuum or pressure mode end stroke if it's in idle. Also, the four-way changeover valve might not be correctly registered, so adjust the functioning play and lubricate it. Other potential issues include worn vanes (replace them), a leaking non-return valve (clean or replace if necessary), worn seal rings (replace), leaking tank gate valves or gaskets (replace damaged or worn parts), leaking or obstructed tank connection pipes (replace damaged pipes), an obstructed primary shutoff or suction filter (remove and clean), an encrusted exhaust port (remove and clean), vacuum line components that are too small dimensione...

Summary

Safety and Accident Prevention

General Recommendations

Provides safety advice for handling, operation, and maintenance of the pump.

Intended Use

Installation

Mounting

Vacuum - Pressure Line

Guidance on connecting vacuum and pressure lines for optimal performance and safety.

Cooling System

Information on connecting and maintaining the pump's cooling circuit.

Overheating Alarm (Optional)

Vacuum-Pressure Inverter: Remote Control Actuators

Pump Mounting - Drive Connection

Instructions for connecting drive systems like cardan shafts, belts, or hydraulic motors.

Start Up

Starting-up of the Pump

Procedures for initial pump operation, including lubrication and cooling checks.

Precautions When Starting the System

Essential safety checks and steps to perform before initial system operation.

Operating Precautions

Maintenance

Ordinary Maintenance

Extraordinary Maintenance

Malfunctions: Troubleshooting

Troubleshooting Guide

Identifies common issues like overheating or reduced performance and provides solutions.

jurop LC 420 Specifications

General

Brand	jurop
Model	LC 420
Category	Water Pump
Language	English

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