MULTIQUIP MAYCO LS400

Questions and Answers

C
Christopher StevensAug 10, 2025
What to do if MULTIQUIP MAYCO LS400 Water Pump main hydraulic cylinder will not cycle?
- J
  Jamie YoungAug 10, 2025
  If the main hydraulic cylinder of your MULTIQUIP Water Pump isn't cycling, there are several potential causes: * **Incorrect System Operating Pressure:** Check the pump pressure gauge and verify it is approximately 4400 PSI. * **Incorrect Engine RPM Setting:** Verify the engine's high RPM speed is set to 2550. * **Contaminated Main Relief Valve:** Check the manifold for a contaminated relief valve. * **Obstructed Material Cylinders:** Check for obstructions, such as dried material, inside the cylinders.
J
jonathanmorrisonAug 15, 2025
Why MULTIQUIP MAYCO LS400 Water Pump battery voltage falls below 12VDC, causing engine not to start?
- K
  Krystal Salas MDAug 15, 2025
  If the battery voltage on your MULTIQUIP Water Pump falls below 12VDC, preventing the engine from starting, consider these potential causes: * **Blown Fuse:** Check the fuse. * **Dead Battery:** Check the charge on the battery. * **Wiring Connection Issue:** Check the wiring connections inside the control box and verify power is reaching the ignition switch.
C
Cody WilliamsAug 19, 2025
What causes MULTIQUIP MAYCO LS400 Water Pump hopper remix paddles not to rotate?
- N
  nwalkerAug 19, 2025
  If the hopper remix paddles on your MULTIQUIP Water Pump are not rotating, here are some possible causes: * **Incorrect Directional Control Operating Pressure:** Verify the directional control operating pressure is approximately 1000 PSI. * **Contaminated Relief Valve:** Check the manifold for a contaminated relief valve. * **Broken Shaft Coupler Key:** Check the hopper remixer shaft coupler for a broken key. * **Loose Shaft Retaining Set Collar:** Check the shaft retaining set collar for tightness.
E
Ernest KingAug 25, 2025
What to do if MULTIQUIP MAYCO LS400 Water Pump shuttle cylinder does not stroke?
- P
  Patricia FergusonAug 25, 2025
  If the shuttle cylinder on your MULTIQUIP Water Pump does not stroke, consider the following possible causes: * **Incorrect Accumulator System Pressure:** Check the system pressure reading and verify it is approximately 1750 PSI. * **Contaminated Relief Valve:** Check the manifold for a contaminated relief valve. * **Swing Solenoid Not Energizing:** Check for a burned-out solenoid and ensure there is a 12V signal voltage. * **Swing Valve Not Functioning Properly:** Manually cycle the pump using the manual cylinder jogging switch.
D
Douglas SchultzAug 30, 2025
Why MULTIQUIP MAYCO LS400 Water Pump engine will idle but not increase to full operating speed?
- C
  Christine HermanAug 30, 2025
  If your MULTIQUIP Water Pump engine idles but does not reach full operating speed, the likely cause is: * **Throttle Control Block Solenoid Not Energizing:** Check for a burned-out solenoid and verify there is a 12V signal voltage.
W
William PaceNov 4, 2025
Why is the MULTIQUIP Water Pump shuttle cylinder slow to complete stroke?
- A
  Allison Jones DVMNov 4, 2025
  Several factors can cause the MULTIQUIP Water Pump shuttle cylinder to complete its stroke slowly: * The flow control setting might be improper. Make sure to fully open the flow control valve. * The engine RPM setting might be incorrect. Verify the engine’s high RPM speed is set to 2550. * The main hydraulic system operating pressure might be incorrect. Check the pump pressure gauge and verify it is approximately 4400 PSI. * The swing relief cartridge might be contaminated. Check the manifold for a contaminated swing relief cartridge. * The accumulator system pressure might be low. Check the accumulator pressure reading and verify it is approximately 1750 PSI. * The hopper discharge nipple seal might be improperly lubricated. Check the hopper discharge nipple seal for seizing ...

Summary

Safety Message Alert Symbols

Hazard Symbols

Symbols indicating potential hazards during operation.

Safety Message Alerts

Alerts for DANGER, WARNING, and CAUTION levels of hazard.

Rules for Safe Operation

General Safety Guidelines

Essential safety rules before operating the pump.

Operational Safety Precautions

Guidelines for safe operation and handling of the equipment.

Safe Operation Procedures

Transportation Safety

Procedures for safely transporting the pump.

Towing Guidelines

Instructions for safely towing the pump trailer.

Maintenance Safety

Amputation Risk Warning

Warning about severe injury risk during maintenance.

Acid and Fuel Hazards

Hazards associated with battery acid and flammable fuel.

Specifications

Pump Specifications

Technical specifications for the LS400/LS500 pump models.

Engine Specifications

Technical specifications for the Deutz diesel engine.

Dimensions

Pump Dimensions

Physical measurements of the LS400/LS500 pump.

Important Hand Signals

Operation Hand Signals

Standardized hand signals used during concrete pumping operations.

General Information

Concrete Mix Design

Factors affecting concrete pumpability and mix design considerations.

Concrete Mix Guidelines

Regional Differences in Concrete

How local materials affect concrete mix design for pumping.

How It Works

Pumping Cycle Explanation

Detailed explanation of the pump's hydraulic and mechanical cycles.

Pump Components Overview

Major Pump Component Identification

Illustrated identification of key pump components.

Component Descriptions

Hydraulic System Components

Descriptions of hydraulic system parts like pumps, filters, and tanks.

Control and Electrical Components

Descriptions of control box, fuel tank, and safety components.

Digital Control Panel

Control Panel Components

Identification and function of buttons, switches, and gauges.

Digital Readout Screen

Primary and Secondary Screens

Explanations of the information displayed on the pump's digital readout.

Engine Components

Engine Part Identification

Illustrated identification of major Deutz engine components.

Initial Servicing Procedures

Steps for initial engine servicing before operation.

Inspection and Fuel Check

Pre-Operation Inspection

Checks required before starting the pump.

Fuel Level Check and Refueling

Procedures for checking and adding diesel fuel.

Fluid Level Checks

Engine Oil Level Check

Procedure for checking and maintaining engine oil levels.

Hydraulic Oil Level Check

Procedure for checking and maintaining hydraulic oil levels.

Pump Setup Procedures

Pump Placement and Hose Laydown

Guidelines for positioning the pump and laying out the delivery hose.

Stabilizer Jack Deployment

Steps for deploying rear stabilizer jacks for pump stability.

Start-Up Procedure

Engine Starting Sequence

Step-by-step instructions for starting the pump engine.

Pump Operation

Hose Lubrication and Priming

Preparing the hose and pump system before concrete pumping.

Pumping Process

Steps for normal pumping operations and volume control.

Pumping Operations

Hydraulic Oil Temperature Monitoring

Importance of monitoring hydraulic oil temperature during operation.

Hose and Line Blockage Caution

Warning and precautions regarding hose or line blockages.

Remote Control Operation

Remote Control Assembly Installation

Instructions for installing the remote control system.

Remote Control Buttons Function

Explanation of the functions of the radio remote control buttons.

Remote Control Usage

Radio Remote Control Programming

Steps to program and connect the radio remote control.

Cable Remote Control Operation

How to operate the pump using a cable remote control.

Pumping Information and Mixes

Concrete Mix Admixtures

Common admixtures used in concrete and their functions.

Pumping Techniques

Guidelines for downhill pumping and hose pulsation.

Pumping Mix Considerations

Mix Properties Affecting Pumping

How concrete properties affect pumping performance and potential issues.

Preventing Mix Set-Up After Shutdown

Procedures to prevent concrete hardening during pump shutdowns.

Concrete Blockage Clearing

General Blockage Clearing

Procedures for clearing concrete blockages in hoses and lines.

Shuttle Tube Blockage

Shuttle Tube Clearing Procedures

Steps to clear blockages within the shuttle tube.

Pump Maintenance Schedule

Maintenance Check Schedule

Recommended maintenance checks based on usage intervals.

Pump and Delivery System Cleaning

Procedures for cleaning the pump and delivery system after use.

Hydraulic System Maintenance

Hydraulic Oil System Maintenance

Guidelines for maintaining the hydraulic oil and filter.

Lubrication Points and Procedures

Recommended lubrication points and frequency for the pump.

Battery and Brake Maintenance

Battery Maintenance Safety

Safety precautions and procedures for battery maintenance.

Brake System Checks

Inspection and maintenance of the trailer brake system.

Lubrication Box and Accumulator

Lubrication Box Cleaning

Procedure for cleaning the lubrication box.

Accumulator Circuit Maintenance

Information on the accumulator circuit and pressure checks.

Wear Plate and Cutting Ring

Wear Component Inspection

Importance of inspecting wear plate and cutting ring for wear.

Cylinder Piston Cup Replacement

Piston Cup Replacement Procedure

Step-by-step guide for replacing concrete cylinder piston cups.

Wear Plate and Ring Replacement

Wear Plate and Ring Replacement Steps

Procedures for replacing wear plate and cutting ring components.

Heat Exchanger Fan Check

Procedure to ensure the heat exchanger cooling fan is working.

Wheel Bearing and Pressure Test

Wheel Bearing Maintenance

Procedures for inspecting and maintaining wheel bearings.

Hydraulic System Pressure Test

Steps to test the hydraulic system pressure.

Trailer Maintenance

Trailer Brake System

Guidelines for maintaining trailer brakes and hydraulic actuator.

Manually Adjusting Trailer Brakes

Steps for manual adjustment of trailer brake shoes.

Trailer Maintenance Details

Adjustable Channel Check

Procedure for checking the adjustable channel on the trailer hitch.

Wheel Bearing Inspection and Service

Annual inspection and lubrication of wheel bearings.

Trailer Suspension and Safety

Torsion Suspension

Information on the trailer's torsion suspension assembly.

Trailer Safety Warnings

Warnings regarding trailer inspection, lifting, and structural integrity.

Trailer Safety Guidelines

General Trailer Safety Information

Essential safety precautions for towing a trailer.

Towing and Driving Tips

Advice on driving with a trailer, including speed and maneuvering.

Trailer Towing Precautions

Driving Conditions and Awareness

Considerations for driving in various conditions with a trailer.

Coupling and Load Rating

Critical steps for safely coupling the trailer and understanding load ratings.

Trailer Safety Checks

Trailer Lights and Mirrors

Checks for trailer lights, signals, and mirrors before towing.

Towing Practices and Adjustments

Tips for practicing towing and adjusting mirrors.

Trailer Safety Labels and VIN

Safety Warning Labels on Trailer

Location and importance of safety labels on the trailer.

Trailer VIN Tag Information

Understanding the information on the Vehicle Identification Number tag.

Tow Vehicle and Trailer Connections

Tow Vehicle Requirements

Guidelines for selecting an appropriate tow vehicle and hitch.

Safety Chain and Breakaway System

Proper rigging of safety chains and breakaway systems.

Coupler and Hitch Safety

Coupler Types and Ball Hitch

Information on trailer coupler types and ball hitch connection.

Hitch Ball Load Rating and Size

Importance of matching hitch ball rating and size to the coupler.

Trailer Coupling Procedures

Ball Hitch Coupling Steps

Detailed steps for securely coupling the trailer to the tow vehicle.

Hitch Ball and Coupler Inspection

Warnings and procedures for inspecting hitch balls and couplers.

Safety Chain and Breakaway System

Attaching Safety Chains Correctly

Proper methods for attaching safety chains to the trailer and tow vehicle.

Breakaway Brake System Function

How the breakaway brake system works and its testing.

Electrical Connections and Tire Safety

Trailer Light and Connector Checks

Ensuring proper operation of trailer lights and electrical connections.

Tire Safety and Lug Nut Tightening

Importance of tire condition, pressure, and proper lug nut torque.

Tire Safety and Loading

Lug Nut Tightness and Warnings

Precautions regarding lug nut loosening and torque.

Tire Pressure and Load Limits

Importance of correct tire pressure and adherence to load limits.

Load Limits and Tire Fundamentals

Determining Trailer Load Limits

How to determine the maximum load capacity for the trailer.

Understanding Tire Information

Basics of tire sidewall information and load capacity.

Tire Information Standards

DOT Tire Identification

Explanation of the U.S. DOT tire identification number.

Uniform Tire Quality Grading

Understanding UTQGS ratings for treadwear, traction, and temperature.

Tire Wear and Repair

Tire Safety Tips

Recommendations for safe tire usage and inspection.

Tire Repair and Replacement

Guidelines for repairing or replacing worn or damaged tires.

Wheel and Lug Nut Torque

Lug Nut Torque Requirements

Proper procedure and torque specifications for wheel lug nuts.

Wheel Bearing and Lug Nut Checks

Importance of checking wheels, bearings, and lug nuts.

Trailer Lights and Signals

Checking Trailer Lights Operation

Procedures for verifying the function of trailer lights and signals.

Pump Troubleshooting

Hydraulic System Hazards

Warnings regarding hydraulic fluid hazards and system pressure.

Pump Malfunction Causes

Common issues causing pump malfunctions and their troubleshooting.

Pump Troubleshooting Continued

Shuttle Cylinder Issues

Troubleshooting steps for shuttle cylinder not stroking or slow stroking.

Engine and Battery Issues

Troubleshooting engine idle problems and low battery voltage.

Advanced Pump Troubleshooting

Hydraulic Pump Noisy or Overheating

Diagnosing issues with noisy hydraulic pumps or overheating fluid.

Delivery Issues and Slurry Problems

Troubleshooting low volume/pressure and concrete slurry issues.

Engine Troubleshooting

Engine Starting and Running Issues

Diagnosing problems with engine starting, stalling, or low power.

Trailer Brake System Troubleshooting

Brake Squeaks and Leaks

Troubleshooting common brake system issues like noise and fluid leaks.

Brake Actuator and Return Spring

Addressing issues with brake actuator, lines, and return springs.

Electrical Troubleshooting

Solenoid Malfunction Readings

Diagnosing open or shorted solenoids based on readings.

Electrical Troubleshooting Continued

Throttle, Fuel, and Unloader Solenoids

Troubleshooting issues with throttle, fuel, and unloader solenoids.

Alternator and Belt Issues

Diagnosing alternator failure and V-belt breakage.

Control Box Wiring Diagram

Digital Control Box Connections

Wiring connections for the digital control box and related components.

Control Box Connector Wiring

J3 and J4 Connector Wiring

Wiring details for control box connectors J3 and J4.

Hopper Vibrator Wiring

Optional Hopper Vibrator Diagram

Wiring diagram for the optional hopper vibrator kit.

Hydraulic System Diagram

Hydraulic Circuit Overview

Schematic of the pump's hydraulic system and component layout.

Manifold Block Ports

Manifold Port Identification

Diagram and list of connections for the hydraulic manifold block ports.

Concrete Mix Information

Example Concrete Mix Report

A sample laboratory report on concrete mix design for pumpability.

Aggregate Grading Specifications

ASTM Aggregate Grading

Standard specifications for grading fine and coarse aggregates.

Slump Test Procedure

Performing a Slump Test

Step-by-step guide on how to perform a concrete slump test.

Recommended Shotcrete System

Shotcrete System Components

Illustrated diagram of a recommended shotcrete system setup.

Shotcrete System Recommendations

General Shotcrete Recommendations

Advice on using steel pipe, vibrators, and nozzle tips for shotcreting.

Shotcrete Accessories

Shotcrete System Accessories Diagram

Illustrated parts breakdown for shotcrete system accessories.

Recommended Shotcrete Accessories List

Shotcrete Accessory Part Numbers

List of part numbers for shotcrete system accessories.

Remarks Column Codes

Parts List Code Explanations

Explanation of symbols and codes used in the parts list remarks column.

Suggested Spare Parts

Spare Parts List for 1 Unit

Recommended spare parts for a single unit configuration.

Spare Parts List for 3 Units

Recommended spare parts for a three-unit configuration.

Nameplate and Decals Overview

Component Label Identification

Illustrated location of various nameplates and decals on the pump.

Nameplate and Decal List

Decal Part Number Reference

List of part numbers and descriptions for pump decals.

Frame Assembly

Frame Assembly Illustration

Diagram showing the main frame components of the pump.

Frame Assembly Parts List

Frame Assembly Part Numbers

List of part numbers for frame assembly components.

Axle Assembly (Right;Left)

Axle Assembly Illustration

Diagram showing the right and left axle assemblies.

Axle Assembly Parts List

Axle Assembly Part Numbers

List of part numbers for the axle assemblies.

Brake Line Assembly

Brake Line Assembly Illustration

Diagram of the trailer's brake line system.

Brake Line Parts List

Brake Line Assembly Part Numbers

List of part numbers for the brake line assembly.

Brake Light Assembly

Brake Light Assembly Illustration

Diagram of the trailer's brake light system.

Brake Light Parts List

Brake Light Assembly Part Numbers

List of part numbers for the brake light assembly.

Trailer Hitch Assembly

Trailer Hitch Assembly Illustration

Diagram of the trailer hitch components.

Trailer Hitch Parts List

Trailer Hitch Assembly Part Numbers

List of part numbers for the trailer hitch assembly.

Battery Assembly

Battery Assembly Illustration

Diagram showing the pump's battery components.

Battery Assembly Parts List

Battery Assembly Part Numbers

List of part numbers for the battery assembly.

Hopper Assembly

Hopper Assembly Illustration

Diagram showing the main components of the pump's hopper.

Hopper Attachment Assembly

Hopper Attachment Illustration

Diagram of components attached to the hopper.

Hopper Interior Assembly

Hopper Interior Illustration

Diagram showing parts inside the pump's hopper.

Shuttle Cylinder Assembly

Shuttle Cylinder Illustration

Diagram of the shuttle cylinder and its related components.

Lubrication Pistons Assembly

Lubrication Pistons Illustration

Diagram of the lubrication pistons assembly.

Fuel Tank Assembly

Fuel Tank Assembly Illustration

Diagram of the pump's fuel tank and related components.

Heat Exchanger Assembly

Heat Exchanger Illustration

Diagram of the heat exchanger and its connected hoses.

Accumulator Assembly

Accumulator Assembly Illustration

Diagram of the accumulator and its connections.

Remixer Control Assembly

Remix Control Illustration

Diagram of the remixer control valve and motor assembly.

Lubrication Panel and Points

Grease Points Identification

Location and procedure for greasing lubrication points on the machine.

Engine Cover Assembly

Engine Cover Illustration

Diagram showing the components of the engine cover.

Hydraulic Tank Assembly

Hydraulic Tank Illustration

Diagram of the hydraulic tank and its associated components.

Engine Assembly

Engine Assembly Illustration

Diagram showing the Deutz engine and its attached components.

Throttle Assembly

Throttle Assembly Illustration

Diagram of the throttle control system and its parts.

Water Separator Assembly

Water Separator Illustration

Diagram of the fuel water separator and its connections.

Hydraulic Pump Assembly

Hydraulic Pump Illustration

Diagram of the main hydraulic pump and its connections.

Manifold Assembly

Manifold Assembly Illustration

Diagram showing the hydraulic manifold block and its ports.

Control Box Assembly

Control Box Assembly Illustration

Diagram of the main electrical control box and its components.

Control Box Harnesses Assembly

Control Box Harnesses Illustration

Diagram showing the wiring harnesses connected to the control box.

Remote Control Cable Assembly

Remote Control Cable Illustration

Diagram of the remote control cable and its connectors.

Hydraulic Stabilizer Assembly (Optional)

Hydraulic Stabilizer Illustration

Diagram of the optional hydraulic stabilizer system.

Mayco Pump Warranty

Mechanical Drive Model Warranty

Warranty terms for mechanical drive pump models.

Hydraulic Drive Model Warranty

Warranty terms for hydraulic drive pump models.