MULTIQUIP LS450 - User Manual

Questions and Answers

N
Natalie NorrisAug 19, 2025
Why is the hydraulic fluid getting hot in my MULTIQUIP LS450 Water Pump?
- M
  Melissa WhitakerAug 19, 2025
  If the hydraulic fluid in your MULTIQUIP Water Pump gets hot, there are several potential causes. First, check the cooling fan's electrical connection and motor. Contaminated cooler fins can also cause overheating, so they should be cleaned. Additionally, inspect the return filter element and replace it if closed. Other potential issues include a contaminated or improperly set main relief cartridge (replace or set to the proper pressure) and a low hydraulic oil level (fill to the proper level).
E
Elizabeth SmithAug 21, 2025
What to do if the engine bogs down on my MULTIQUIP Water Pump?
- M
  matthewshahAug 21, 2025
  If your MULTIQUIP Water Pump's engine bogs down, start by checking the engine RPM to ensure it's not running too low. Also, inspect the main relief cartridge setting and adjust if necessary. If the engine is overloaded when pumping, decrease the volume control on the main pump.
J
James PrestonAug 23, 2025
Why my MULTIQUIP LS450 Water Pump does not deliver volume and pressure?
- A
  Anna GrahamAug 23, 2025
  If your MULTIQUIP Water Pump is not delivering the expected volume and pressure, begin by checking the engine RPM to ensure it is at the correct level. Next, verify that the volume control is set to the fully open position. Finally, check the main hydraulic pressure for proper levels and inspect for a contaminated relief cartridge.
M
Michelle GibbsAug 26, 2025
How to troubleshoot Main Hydraulic Cylinder that will not cycle in MULTIQUIP Water Pump?
- D
  Dr. Nicholas MoralesAug 26, 2025
  If the Main Hydraulic Cylinder of your MULTIQUIP Water Pump will not cycle, check the pump pressure gauge to verify it is approximately 4,300–4,400 PSI. Also, verify the engine’s high RPM speed is set to 2,400. Other potential causes include a contaminated Main Relief Valve (check the manifold) or obstructed Material Cylinders (check for dried material inside the cylinders).
C
Christina FloydAug 27, 2025
Why is the Main Hydraulic Pump noisy on my MULTIQUIP LS450 Water Pump?
- A
  Amanda PerezAug 28, 2025
  If the Main Hydraulic Pump on your MULTIQUIP Water Pump is noisy, check the oil level and ensure the suction strainer is not closed. Also, check for aeration in the reservoir. Other potential causes include excessive pump wear (repair or replace) and excessive engine speed (check for correct engine RPM).
P
Pamela JacksonAug 30, 2025
What causes Hopper Remix Paddles not to rotate in MULTIQUIP LS450 Water Pump?
- N
  Nicole WhiteAug 30, 2025
  If the Hopper Remix Paddles on your MULTIQUIP Water Pump will not rotate, verify the Directional Control operating pressure is approximately 1,000 PSI. Also, check the manifold for a contaminated Relief Valve. Other potential causes include a broken Shaft Coupler Key (check the Hopper Remixer shaft coupler) or a loose Shaft Retaining Set Collar (check for tightness).
F
friosSep 1, 2025
Why Shuttle Cylinder does not stroke on MULTIQUIP LS450 Water Pump?
- J
  jennifer57Sep 1, 2025
  If the Shuttle Cylinder on your MULTIQUIP Water Pump does not stroke, check the system pressure reading and verify it is approximately 1,750 PSI. Also, check the manifold for a contaminated Relief Valve. Other potential causes include a Swing Solenoid not energizing (check for burned out solenoid and 12V signal voltage) or a Swing Valve not functioning properly (manually cycle the pump using the manual cylinder jogging switch).
C
Connie GarciaSep 3, 2025
Why is Shuttle Cylinder slow to complete stroke on MULTIQUIP Water Pump?
- S
  Sharon AlvaradoSep 3, 2025
  If the Shuttle Cylinder on your MULTIQUIP Water Pump is slow to complete its stroke, fully open the Flow Control Valve. Also, verify the engine’s high RPM speed is set to 2,400. Check the pump pressure gauge to verify the Main Hydraulic System Operating Pressure is approximately 4,300–4,400 PSI. Other potential causes include a contaminated Swing Relief Cartridge (check the manifold), low Accumulator System Pressure (verify it is approximately 1,750 PSI), or a Hopper Discharge Nipple Seal that is improperly lubricated (check for seizing and lack of lubricant).
S
sancheztaraSep 5, 2025
What to do if Accumulator gauge reads below 1,750 PSI on MULTIQUIP LS450?
- J
  Julie MorrisonSep 5, 2025
  If the Accumulator gauge on your MULTIQUIP Water Pump reads below 1,750 PSI, check the accumulator bottle for low nitrogen (precharge pressure should be 1,100 PSI). You should also replace the contaminated safety relief cartridge, defective unloader cartridge electrical coil, or defective gear pump. Also check for 12 Volt signal voltage if unloader cartridge coil is not energizing.
R
Rachel GreeneSep 7, 2025
Why cylinders are not completely extended on MULTIQUIP LS450 Water Pump?
- A
  Anthony SullivanSep 7, 2025
  If the cylinders on your MULTIQUIP Water Pump are not completely extended (short stroke), inspect the cylinder and check the valves for contamination or a faulty spring, which could indicate an excessive amount of hydraulic fluid on the cylinder rod side. Also, replace the seals if the hydraulic cylinder piston head seal is leaking.

Summary

Proposition 65 Warning

Silicosis and Respiratory Warnings

Safety Information

Safety Messages

Explains the meaning of DANGER, WARNING, CAUTION, and NOTICE safety messages.

Safety Symbols

Describes various hazard symbols and their meanings.

General Safety

Outlines essential safety precautions for operating the equipment.

Pump Safety

Details critical safety warnings related to pump operation and potential hazards.

Safety Information Continued

Engine Safety

Provides crucial safety guidelines for operating and servicing the engine.

Fuel Safety

Outlines essential safety measures for handling and using fuel.

Battery Safety

Details safety precautions for handling and working with the battery.

Transporting Safety

Provides safety guidelines for lifting and transporting the equipment.

Towing Safety

Outlines essential safety precautions and procedures for towing the trailer.

Safety Information Final

Environmental Safety and Decommissioning

Covers safe practices for decommissioning and disposal of equipment.

Emissions Information

Provides information regarding diesel engine emissions and control labels.

Specifications

Dimensions

Important Hand Signals

General Information

Concrete Mix Design

Discusses factors affecting concrete pumpability and mix design considerations.

Regional Differences

Explains variations in concrete mix design based on region.

Pumping Information

Details information on admixtures and specific pumping techniques.

General Information Continued

Hose Pulsation

Discusses factors causing hose pulsation and potential solutions.

Snap-Joint Couplings

Provides guidance on using and maintaining snap-joint couplings.

General Information Further

Effects of Heat and Excessive Time on Concrete

Explains how heat and time affect concrete during pumping.

Preventing Mix Set-Up After Pump Shutdown

Offers suggestions to prevent concrete from setting during pump shutdowns.

General Information Troubleshooting

Clearing System After Mix Set-Up

Provides steps for clearing the system after concrete mix has set up.

Clearing Concrete Blockage

Details procedures for clearing blockages in the concrete lines.

General Information Procedures

Reverse Pumping Procedure

Outlines the steps for performing a reverse pumping operation.

Shuttle Tube Inspection Procedure

Describes the procedure for inspecting the shuttle tube.

General Information Cycles

Pumping Cycle 1

Explains the first phase of the pumping cycle sequence.

Pumping Cycle 2

Explains the second phase of the pumping cycle sequence.

Components (Pump)

Tow Hitch Coupler

Describes the tow hitch coupler and its requirements.

Hopper;Hood

Describes the hopper for filling concrete and safety precautions.

Shuttle Cylinder;Guard

Identifies the shuttle cylinder and its safety guard.

Tires

Details the tire specifications and pressure checks.

Battery

Identifies the battery type and handling precautions.

Pump Components Continued

Hydraulic Oil Sight Glass

Describes the sight glass for checking hydraulic oil level and temperature.

Control Box

Identifies the control box containing electrical components.

Volume Control

Explains the function of the volume control device.

Lubrication Box

Describes the lubrication box and its initial filling.

Accumulator

Describes the accumulator's function in storing hydraulic oil pressure.

Components (Digital Control Panel)

Emergency Stop Button

Explains how to use the emergency stop button to halt operations.

Ignition Switch

Details how to use the ignition switch to start and stop the engine.

Pumping Control Switch

Describes the 3-position switch for controlling pump operation.

Manual Cylinder Jogging Switch

Explains the switch for manually jogging cylinders.

Cylinder Stroke Control Switch

Describes the switch that controls the pump's cycling mode.

Accumulator Pressure Gauge

Explains the accumulator pressure gauge.

Main Pressure Gauge

Explains the main pressure gauge.

Digital Control Panel Screens

Primary Screen

Describes the main screen displaying switch and engine status.

Secondary Screens

Details the various secondary screens for monitoring.

Components (Engine)

Oil Filter

Identifies the oil filter.

Fuel Fine Filter

Details the fuel fine filter.

Dipstick

Identifies the oil dipstick.

Inspection

Before Starting

Outlines essential checks and safety readings before starting the pump.

Fuel Check

Explains how to check the fuel level using the fuel gauge.

Inspection Continued

Engine Oil Check

Details the procedure for checking engine oil levels.

Inspection Further

Hydraulic Oil Check

Explains how to check the hydraulic oil level.

Setup

Location of Pump

Provides guidance on selecting the optimal pump location.

Rear Stabilizer Jacks

Details the procedure for deploying rear stabilizer jacks for stability.

Operation

Starting Procedure

Outlines the step-by-step procedure for starting the pump engine.

Operation Continued

Hose Lubrication

Explains the necessity and procedure for lubricating the hose.

Priming the Pump with Slurry Mixture

Details the critical procedure for priming the pump with a slurry mixture.

Pumping

Provides initial steps for commencing pump operation.

Operation Details

Hopper Remixer Control Lever

Details the operation of the hopper remixer control lever.

Operation Features

Remote Control (Optional)

Introduces the optional remote control feature for the pump.

Installation of the Radio Remote Control Assembly

Guides through installing the radio remote control assembly.

Remote Control Operation

Radio Remote Control Operation

Explains how to operate the radio remote control.

Radio Remote Control Programming

Details how to program the radio remote control.

Remote Control Cable Operation

Remote Control Cable Operation (25 Feet)

Explains the operation of the 25-foot remote control cable.

Maintenance Schedule

Check Engine Fluid Levels

Describes checking engine fluid levels.

Check Air Cleaner

Details checking the air cleaner.

Change Fuel Filter

Explains changing the fuel filter.

Replace Air Filter Element

Explains replacing the air filter element.

Hydraulic Oil Level

Details checking the hydraulic oil level.

Replace Hydraulic Oil

Explains replacing hydraulic oil.

Maintenance Tasks

General Inspection

Outlines general inspection procedures before each use.

Air Cleaner (250 Hours)

Details the procedure for checking and maintaining the air cleaner.

Daily Checks

Checking Engine Oil (Daily)

Details the daily procedure for checking engine oil levels.

Engine Maintenance

Changing Engine Oil and Filter

Details the process for changing engine oil and filter.

Radiator;Cooling System

Covers maintenance of the radiator and cooling system.

System Maintenance

Operation in Freezing Weather

Provides guidance for operating in freezing weather.

Radiator Maintenance

Details maintenance procedures for the radiator.

Fuel Prefilter

Explains the replacement procedure for the fuel prefilter.

Fuel System Maintenance

Fuel Prefilter Water Separator

Details draining the water separator in the fuel prefilter.

Fuel Fine Filter

Explains the replacement procedure for the fuel fine filter.

V-Belt

Details the visual inspection of the V-belt.

Battery Maintenance

Outlines safety precautions and procedures for battery maintenance.

Cleaning and Hydraulic Maintenance

Cleaning the Pump and Delivery System

Provides steps for cleaning the pump and delivery system after use.

Hydraulic Oil System Maintenance

Discusses hydraulic oil system maintenance, focusing on cold weather effects.

Pump Lubrication

Details daily or hourly lubrication requirements for pump components.

Lubrication Box and Accumulator

Cylinder Lubrication Box

Covers checking and cleaning the cylinder lubrication box.

Accumulator Circuit

Explains the accumulator circuit's function and components.

Wear Components and Pressure

Checking Accumulator Bladder Pressure

Details how to check accumulator bladder pressure.

Wear Plate and Cutting Ring

Explains inspection and replacement of wear plate and cutting ring.

Cylinder Maintenance

Cylinder Cup Replacement Procedure

Provides detailed steps for replacing cylinder cups.

Component Replacement

Wear Plate and Cutting Ring Replacement

Details the replacement procedure for wear plate and cutting ring.

Heat Exchanger Cooling Fan

Explains how to check the cooling fan's operation.

Pressure Test

Describes how to perform a pressure test on the hydraulic system.

Storage Procedures

Long-Term Storage (Trailer)

Outlines maintenance for trailers during long-term storage.

Long-Term Storage (Pump)

Outlines maintenance for the pump during long-term storage.

Trailer Maintenance

Trailer Brakes

Covers inspection and adjustment of trailer brakes.

Manually Adjusting the Brakes

Provides steps for manually adjusting trailer brakes.

Hydraulic Brake Actuator

Explains the hydraulic brake actuator and fluid level checks.

Trailer Maintenance Details

Wheel Bearings

Outlines inspection and lubrication of wheel bearings.

Wheel Hub Maintenance

Wheel Hub Adjustment

Details the procedure for adjusting wheel bearings.

Suspension Maintenance

Torsion Suspension

Covers inspection of the torsion suspension components.

Trailer Guidelines

Common Causes for Loss of Trailer

Lists common reasons for losing control of a trailer.

Trailer Towing Guidelines

Provides general guidelines for towing a trailer.

Trailer Guidelines Continued

Driving Conditions

Discusses driving considerations when towing a trailer.

Coupling to the Tow Vehicle

Details safety precautions for coupling the trailer to the tow vehicle.

Towing Checks

Inoperable Brakes, Lights or Mirrors

Emphasizes checking trailer lights, brakes, and mirrors before towing.

Trailer Towing Tips

Offers practical tips for towing a trailer.

Trailer Components

Electrical Connector

Explains the electrical connector for trailer lights and brakes.

Trailer Safety Features

Safety Chains

Explains the importance and attachment of safety chains.

Breakaway System

Explains the breakaway system for emergency brakes.

Ball Hitch Coupler

Details the ball hitch coupler and its maintenance.

Ball Hitch Coupling

Coupling the Trailer to the Tow Vehicle (Ball Coupler)

Provides steps for coupling the trailer using a ball hitch.

Breakaway System Procedures

Attaching Safety Chain

Details the correct method for attaching safety chains.

Breakaway Brake System

Explains the function of the breakaway brake system.

Trailer Connections

Connecting Trailer Lights

Guides on connecting and checking trailer lights.

Pintle Hitch Coupler

Details the pintle hitch coupler and its maintenance.

Pintle Hitch Coupling

Coupling Trailer to Tow Vehicle (Pintle Coupler)

Provides steps for coupling the trailer using a pintle hitch.

Tire Safety

Covers essential safety checks for trailer tires.

Lug Nut Torque Requirements

Details proper torque for lug nuts.

Load Limits

Determining Load Limit of Trailer

Explains how to determine the trailer's load capacity.

Determining Load Limit of Tow Vehicle

Explains how to determine the tow vehicle's load capacity.

Tire Information

Tire Fundamentals

Explains basic tire information found on sidewalls.

Speed Rating

Discusses tire speed ratings.

Maximum Load Rating

Explains tire load ratings.

Maximum Permissible Inflation Pressure

Discusses maximum tire inflation pressure.

Tire Care

Tire Safety Tips

Provides essential safety tips for trailer tires.

Replacing Worn or Damaged Tires

Details when to replace worn or damaged tires.

Wheel and Bearing Maintenance

Wheels, Bearings and Lug Nuts

Discusses checking wheels, bearings, and lug nuts.

Lighting and Signals

Lights and Signals

Guides on checking trailer lights and signals before towing.

Appendix: Concrete Mix Information

Concrete Mix Information

Discusses concrete mix design for pumpability based on lab reports.

Design for One Yard of Concrete (Saturated & Surface Dry)

Provides design calculations for one cubic yard of concrete.

Aggregate Specifications

ASTM Standard Specification for Grading Aggregate

Lists ASTM specifications for aggregate grading.

Slump Test Procedure

Details the step-by-step procedure for performing a concrete slump test.

Troubleshooting (Pump)

Main Hydraulic Cylinder will not cycle

Lists possible causes and solutions for the main hydraulic cylinder not cycling.

Hopper Remix Paddles will not rotate

Lists possible causes and solutions for non-rotating hopper remix paddles.

Shuttle Cylinder does not stroke

Lists possible causes and solutions for shuttle cylinder issues.

Pump Troubleshooting Continued

Pump Engine idle but not increase to full operating speed

Lists causes and solutions for engine speed issues.

Battery voltage falls below 12 VDC, causing engine not to start

Lists causes and solutions for low battery voltage and starting problems.

Machine does not deliver volume and pressure

Lists causes and solutions for low volume and pressure.

Hydraulic fluid gets hot

Lists causes and solutions for overheating hydraulic fluid.

Accumulator gauge reads below 1,750 PSI

Lists causes and solutions for low accumulator pressure.

Troubleshooting (Engine)

Engine will not start or start is delayed

Lists causes and solutions for engine starting issues.

Low engine power, output and speed

Lists causes and solutions for reduced engine performance.

Troubleshooting (Hydraulic Brakes)

No brakes

Lists causes and solutions for a complete lack of brakes.

Weak brakes or brakes pull to one side

Lists causes and solutions for weak or uneven braking.

Brakes overheat, fail to operate, pull to the side, or function poorly

Lists causes and solutions for general brake malfunction.

Troubleshooting (Electrical)

Malfunction Reading (Screen 1)

Lists electrical malfunctions indicated on Screen 1 and their solutions.

MULTIQUIP LS450 Specifications

General

Model	LS450
Fuel Type	Gasoline
Suction Size	4 inch (100 mm)
Discharge Size	4 inch (100 mm)
Max. Capacity	450 GPM
Solids Handling	1 inch

Related product manuals

MULTIQUIP MAYCO LS400

148 pages

MULTIQUIP LS450 - User Manual

Table of Contents

Questions and Answers

Summary

Proposition 65 Warning

Silicosis and Respiratory Warnings

Safety Information

Safety Messages

Safety Symbols

General Safety

Pump Safety

Safety Information Continued

Engine Safety

Fuel Safety

Battery Safety

Transporting Safety

Towing Safety

Safety Information Final

Environmental Safety and Decommissioning

Emissions Information

Specifications

Dimensions

Important Hand Signals

General Information

Concrete Mix Design

Regional Differences

Pumping Information

General Information Continued

Hose Pulsation

Snap-Joint Couplings

General Information Further

Effects of Heat and Excessive Time on Concrete

Preventing Mix Set-Up After Pump Shutdown

General Information Troubleshooting

Clearing System After Mix Set-Up

Clearing Concrete Blockage

General Information Procedures

Reverse Pumping Procedure

Shuttle Tube Inspection Procedure

General Information Cycles

Pumping Cycle 1

Pumping Cycle 2

Components (Pump)

Tow Hitch Coupler

Hopper;Hood

Shuttle Cylinder;Guard

Tires

Battery

Pump Components Continued

Hydraulic Oil Sight Glass

Control Box

Volume Control

Lubrication Box

Accumulator

Components (Digital Control Panel)

Emergency Stop Button

Ignition Switch

Pumping Control Switch

Manual Cylinder Jogging Switch

Cylinder Stroke Control Switch

Accumulator Pressure Gauge

Main Pressure Gauge

Digital Control Panel Screens

Primary Screen

Secondary Screens

Components (Engine)

Oil Filter

Fuel Fine Filter

Dipstick

Inspection

Before Starting

Fuel Check

Inspection Continued

Engine Oil Check

Inspection Further

Hydraulic Oil Check

Setup

Location of Pump

Rear Stabilizer Jacks

Operation