MULTIQUIP MAYCO LS300GK User manual

OPERATION MANUAL
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
Revision #1 (10/14/22)
SERIES
MODEL LS300GK
CONCRETE PUMP
(KUBOTA WG3800-G-E3 GASOLINE ENGINE)
To find the latest revision of this publication or
associated parts manual, visit our website at:
www.multiquip.com

PAGE 2 — MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22)
PROPOSITION 65 WARNING

MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22) — PAGE 3
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis.Inaddition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
WARNING
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity,or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations.Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
WARNING
SILICOSIS WARNING RESPIRATORY HAZARDS
SILICOSIS/RESPIRATORY WARNINGS

PAGE 4 — MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22)
TABLE OF CONTENTS
LS300GK Concrete Pump
Proposition 65 Warning ........................................... 2
Silicosis/Respiratory Warnings ................................ 3
Table Of Contents.................................................... 4
Safety Information ............................................. 6–11
Specifications ........................................................ 12
Dimensions............................................................ 13
Important Hand Signals......................................... 14
General Information......................................... 15–21
Pump Components.......................................... 22–25
Digital Control Panel Components .................. 26–27
Engine Components.............................................. 28
Inspection ........................................................ 29–31
Setup ..................................................................... 32
Operation......................................................... 33–38
Maintenance.................................................... 40–53
Trailer Maintenance ......................................... 54–56
Trailer Guidelines............................................. 57–71
Appendix — Concrete Mix Information............ 72–74
Troubleshooting (Pump) .................................. 75–76
Troubleshooting (Engine)................................. 77–78
Troubleshooting (Hydraulic Brakes)....................... 79
Troubleshooting (Electrical) ............................. 80–81
Troubleshooting (Diagnostics) ......................... 82–87
Hydraulic System Locator Diagram ....................... 88
Hydraulic System Diagram .................................... 89
Electrical System Locator Diagram ....................... 90
Electrical System Diagram 1 ................................. 91
Electrical System Diagram 2 ................................. 92
Electrical System Diagram 3 ................................. 93

MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22) — PAGE 5
NOTES

PAGE 6 — MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22)
SAFETY INFORMATION
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others.The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION
or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
OFF
Lethal Exhaust Gas Hazards
Explosive Fuel Hazards
Burn Hazards
Respiratory Hazards
Accidental Starting Hazards
Eye and Hearing Hazards
Pressure Hazards
Symbol Safety Hazard
Rotating Parts Hazards
Hydraulic Fluid Hazards

MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22) — PAGE 7
SAFETY INFORMATION
GENERAL SAFETY
CAUTION

NEVER operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.

NEVER operate this equipment when not
feeling well due to fatigue, illness, or while
on medication.

NEVER operate this equipment under the influence of
drugs or alcohol.
NOTICE

This equipment should only be operated by trained and
qualified personnel 18 years of age and older.

Whenever necessary, replace nameplate, operation, and
safety decals when they become difficult to read.

Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.

NEVER use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.

ALWAYS know the location of the nearest
fire extinguisher.

ALWAYS know the location of the nearest
first aid kit.

ALWAYS know the location of the nearest phone or keep
a phone on the job site. Also, know the phone numbers
of the nearest ambulance, doctor and fire department.
This information will be invaluable in the case of an
emergency.
PUMP SAFETY
DANGER
NEVER
pump volatile, explosive, flammable or low flash
point fluids. These fluids could ignite or explode.

The engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.

The engine of this equipment requires an adequate free
flow of cooling air. NEVER
operate this equipment in any
enclosed or narrow area
where free flow of the air is
restricted. If the air flow is
restricted it will cause injury
to people and property and
serious damage to the
equipment or engine.
NEVER operate the equipment in an explosive
atmosphere or near combustible materials.An
explosion or fire could result causing severe
bodily harm or even death.
WARNING
NEVER
pump corrosive chemicals or water containing
toxic substances. These fluids could create serious
health and environmental hazards. Contact local
authorities for assistance.
NEVER disconnect any
emergency or safety devices.
These devices are intended for operator safety.
Disconnection of these devices can cause severe injury,
bodily harm or even death. Disconnection of any of these
devices will void all warranties.
DANGEROUS
GAS FUMES

PAGE 8 — MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22)
SAFETY INFORMATION
CAUTION

NEVER lubricate components or attempt service on a
running machine.

NEVER block or restrict flow from discharge hose.
Remove kinks from discharge line before starting the
pump.

DO NOT operate this equipment unless the hopper grate,
guards, and safety devices are attached and bolted in
place.

CAUTION must be exercised while servicing this
equipment. Rotating and moving parts can cause injury
if contacted.

Keep hands out of the hopper when the engine is
running.
NOTICE

In winter, drain water and oil from the lubrication box to
prevent freezing.

ALWAYS be sure the operator is familiar with proper
safety precautions and operation techniques before
using the pump.

Keep all inexperienced and unauthorized people away
from the equipment at all times.

Before start-up, check the hopper and remove all foreign
matter and debris.

DO NOT use worn or damaged hose couplings. Inspect
all hoses and couplings for wear. Replace any worn or
defective hose or couplings immediately.

Unauthorized equipment modifications will void all
warranties.

Check all fasteners periodically for tightness. Also check
towing tongue bolt, lock nut ,and wheel lug nuts for wear.

Test the pump’s emergency stop switch. The purpose
of this test is to shut down the engine in the event of an
emergency.

Refer to the Kubota engine owner’s manual for engine
technical questions or information recommended by
Multiquip for this equipment. Damage to the equipment
and or injury to user may result.
ALWAYS remove the ignition key when leaving the pump
unattended.
ALWAYS
block the wheels on the unit when using on
a slope.
ALWAYS
use properly rated hoses and clamps —
1,500 psi or higher.
ALWAYS
allow the pump a proper amount of time to
cool before servicing.
ALWAYS keep the machine in proper running condition.
ALWAYS
ensure the pump is on level ground before use.

Fix damage to the machine and replace any broken
parts immediately.
ALWAYS
store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
ENGINE SAFETY
WARNING
DO NOT
place hands or fingers inside the engine
compartment when the engine is running.
NEVER
operate the engine with heat shields or
guards removed.
DO NOT remove the engine oil drain plug
while the engine is hot. Hot oil will gush
out of the oil tank and severely scald any
persons in the general area of the pump.
CAUTION
NEVER touch the hot exhaust manifold,
muffler, or cylinder. Allow these parts to
cool before servicing equipment.
NOTICE
NEVER
run the engine without an air filter or with a dirty
air filter. Severe engine damage may occur. Service the
air filter frequently to prevent engine malfunction.
NEVER tamper with the factory settings
of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the
maximum allowable.

MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22) — PAGE 9
SAFETY INFORMATION
FUEL SAFETY
DANGER

DO NOT start the engine near spilled fuel or combustible
fluids. Fuel is extremely flammable and its vapors can
cause an explosion if ignited.

ALWAYS refuel in a well-ventilated area, away from
sparks and open flames.

ALWAYS use extreme caution when working with
flammable liquids.

DO NOT fill the fuel tank while the engine is running
or hot.

DO NOT overfill the fuel tank, as spilled fuel can ignite
if it comes into contact with hot engine parts or sparks
from the ignition system.

Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.

NEVER use fuel as a cleaning agent.

DO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.

DO NOT overfill the fuel tank. Tighten the fuel cap until
it clicks.
BATTERY SAFETY
DANGER
DO NOT
drop the battery. There is a possibility that the
battery will explode.
DO NOT expose the battery to open flames,
sparks, cigarettes, etc.The battery contains
combustible gases and liquids. If these
gases or liquids come into contact with a
flame or spark, an explosion could occur.
WARNING
ALWAYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
Use well-insulated gloves when picking up
the battery.
ALWAYS
keep the battery charged. If the battery is not
charged, combustible gas will build up.
DO NOT
charge the battery if frozen. The battery can
explode.When frozen, warm the battery to at least 61°F
(16°C).
ALWAYS
recharge the battery in a well-ventilated
environment to avoid the risk of a dangerous concentration
of combustible gases.
If the battery liquid (dilute sulfuric acid)
comes into contact with clothing or skin,
rinse skin or clothing immediately with
plenty of water.

If the battery liquid (dilute sulfuric acid) comes into
contact with eyes
, rinse eyes immediately with plenty
of water and contact the nearest doctor or hospital to
seek medical attention.
CAUTION
ALWAYS disconnect the
NEGATIVE battery terminal
before performing service on the equipment.
ALWAYS
keep battery cables in good working condition.
Repair or replace all worn cables.

PAGE 10 — MAYCO LS300GK CONCRETE PUMP • OPERATION MANUAL — REV. #1 (10/14/22)
SAFETY INFORMATION
TRANSPORTING SAFETY
NOTICE

ALWAYS shut down the engine before transporting.

Tighten the fuel tank cap until it clicks to prevent fuel
from spilling.

DO NOT lift the machine.

ALWAYS tie down equipment during transport by
securing the equipment with straps, rope, or chains.
TOWING SAFETY
CAUTION

Check with your local county or state safety
towing regulations, in addition to meeting
Department of Transportation (DOT)
SafetyTowing Regulations,before towing
your generator.

In order to reduce the possibility of an accident while
transporting your concrete pump on public roads,
ALWAYS make sure the trailer that supports the pump
and the towing vehicle are mechanically sound and in
good operating condition.

ALWAYS shut down the engine before transporting.

Make sure the hitch and coupling of the towing vehicle
are rated equal to or greater than the trailer gross vehicle
weight rating.

ALWAYS inspect the hitch and coupling for wear. NEVER
tow a trailer with defective hitches, couplings, chains, etc.

Check the tire air pressure on both towing vehicle and
trailer. Trailer tires should be inflated to 80 psi cold.
Also check the tire tread wear on both vehicles.

ALWAYS make sure the trailer is equipped with a safety
chain.

ALWAYS properly attach the trailer’s safety chains to
the towing vehicle.
ALWAYS make sure the vehicle and trailer directional,
backup, brake, and trailer lights are connected and
working properly.
DOT requirements include the following:
• Connect and test electric brake operation.
• Secure portable power cables in cable tray with tie
wraps.
The maximum speed for highway towing is 55 MPH
unless
posted otherwise. Recommended off-road towing is not to
exceed 15 MPH
or less depending on the type of terrain.

Avoid sudden stops and starts.This can cause skidding
or jack-knifing. Smooth, gradual starts and stops will
improve towing.
Avoid sharp turns to prevent rolling.

Trailer should be adjusted to a level position at all times
when towing.

Raise and lock the trailer wheel stand in the up position
when towing.
Place chock blocks
underneath the wheels to prevent
rolling while parked.
Place support blocks
underneath the trailer’s bumper
to prevent tipping while parked.

Use the trailer’s swivel jack to adjust the trailer height to
a level position while parked.
DO NOT
tow the machine with concrete inside the
hopper.