Multiquip C-30HDNI User Manual
OPERATION AND PARTS MANUAL
SERIES
MODEL C-30HDNI
CONCRETE PUMP
(PRECISION FUEL INJECTION)
UP TO S/N: 240601
Revision #7 (04/03/12)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
PAGE 2 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
SILICOSIS/RESPIRATORY WARNINGS
WARNING
SILICOSIS WARNING RESPIRATORY HAZARDS
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. In addition, 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.
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 3
TABLE OF CONTENTS
MAYCO C-30HDNI (PRECISION)
CONCRETE PUMP
Proposition 65 Warning .............................................. 2
Silicosis Warning ........................................................ 3
Table of Contents .......................................................4
Parts Ordering Procedures ........................................5
Pump Specifications ...................................................6
Engine Specifications ................................................. 6
Pump Dimensions ......................................................7
Safety Message Alert Symbols .............................. 8-9
Rules for Safe Operation.................................... 10-12
Towing Guidelines .............................................. 14-15
Trailer Safety Guidelines .................................... 16-18
Operation And Safety Decals ................................... 20
Important Hand Signals ........................................... 21
Pump Components ............................................ 22-23
Control Box Components .........................................24
Engine Components ................................................ 25
General Information .................................................26
How it Works ....................................................... 27-28
Operating Information ........................................ 29-33
Inspection ........................................................... 34-36
Startup/Shutdown Procedures ................................. 37
Maintenance (Pump) ......................................... 38-47
Engine Troubleshooting...................................... 48-49
Malfunction Indicator Diagnostic Error Codes ....... 50-53
Component Location (EFI Wiring Harness) ............. 54
Wiring Diagram (EFI Wiring Harness) ...................... 55
Wiring Diagram ........................................................56
Wiring Diagram (Trailer Lights) ................................ 57
Appendix —
Slump Test Procedure ........................................ 58
Concrete Mix Information ............................. 59-61
Recommended Shotcrete System ............... 62-63
Recommended Shotcrete Accessories........ 64-65
Explanation of Codes in Remarks Column ..............66
Suggested Spare Parts ............................................67
COMPONENT DRAWINGS
Nameplate and Decals....................................... 68-69
Compensator Piston Rod Assembly .................. 70-71
Connecting Rod - Drive Side Assembly ............. 72-73
Rocker Assembly ............................................... 74-75
Countershaft Assembly ...................................... 76-77
Crankshaft Assembly ......................................... 78-79
Manifold Assembly ............................................. 80-81
Frame Assembly ................................................ 82-83
Axle Assembly .................................................... 84-85
Muffler, Air filter And Stop Switch Assembly ...... 86-87
Clutch Assy ........................................................ 88-89
Radiator & Engine Mounting Bracket Assy......... 90-91
Radiator, Mounting And Hoses Assembly .......... 92-93
Control Box Assembly ........................................ 94-95
Battery Assembly ............................................... 96-97
Fuel Tank Assembly ........................................... 98-99
Hopper Assy................................................... 100 101
Hood Assembly .............................................. 102-103
Lubrication Panel Assembly ........................... 104-105
Remote Control Cable Assembly ................... 106-107
Precision Fuel Injection System ..................... 108-109
COMPONENT DRAWINGS
(NISSAN ENGINE)
Cylinder Block And Oil Pan Assembly ............ 110-111
Cylinder Head And Valve Cover Assembly .... 112-113
Crankcase Ventilation Assembly .................... 114-115
Piston, Crankshaft And Flywheel Assembly... 116-117
Camshaft And Valve Mechanism Assembly ... 118-119
Manifold Assembly ......................................... 120-121
Oil Pump Assembly ........................................ 122-123
Exhaust Tube and Muffler Assembly .............. 124-125
Water Pump Assembly ................................... 126-127
Ignition System Assembly .............................. 128-129
Distributor Assembly ...................................... 130-131
Alternator Assembly ....................................... 132-133
Terms and Conditions Of Sale — Parts .................134
Mayco Pump Warranty ........................................... 135
NOTE
PAGE 4 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
Specification and part
number are subject to change
without notice.
r
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
January 1
Effective:
st
, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specification Information
Goto www.multiquip.com and click on
Order Parts
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
to log in and save!
Order via Phone:
If you have an MQ Account, to obtain a Username
and Password, E-mail us at: parts@multiquip.
com.
To obtain an MQ Account, contact you
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Domestic (US) Dealers Call:
1-800-427-1244
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
When ordering parts, please supply:
❒ Dealer Account Number
❒ Dealer Name and Address
❒ Shipping Address (if different than billing address)
❒ Return Fax Number
❒ Applicable Model Number
❒ Quantity, Part Number and Description of Each Part
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
❒ Specify Preferred Method of Shipment:
✓ UPS/Fed Ex ✓ DHL
■ Priority One ✓ Tr uck
■ Ground
■ Next Day
■ Second/Third Day
www.multiquip.com
WE ACCEPT ALL MAJOR CREDIT CARDS!
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 5
C-30HDNI (PRECISION) PUMP — PUMP SPECIFICATIONS
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PAGE 6 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — PUMP DIMENSIONS
Figure 1. C-30HDNI Concrete Pump Dimensions
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 7
C-30HDNI (PRECISION) PUMP — SAFETY MESSAGE ALERT SYMBOLS
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
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.
This Owner's Manual has been
NOTE
Refer to the engine manufacturers instructions for data relative
to its safe operation.
Before using this pump, ensure that the operating individual
has read and understands all instructions in this manual.
developed to provide complete
instructions for the safe and efficient
operation of the Mayco Model
C-30HDNI Concrete Pump.
HAZARD SYMBOLS
Potential hazards associated with operation of the pump will be
referenced with Hazard Symbols which appear throughout this
manual, and will be referenced in conjunction with Safety
Message Alert Symbols. Some examples are listed below:
WARNING - LETHAL EXHAUST GASES
structure that does not provide ample free flow air.
WARNING - EXPLOSIVE FUEL
SAFETY MESSAGE ALERT SYMBOLS
The three (3) 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 three words: DANGER,
WARNING, or CAUTION.
could ignite if it comes into contact with hot engine parts or
DANGER
You WILL be KILLED or SERIOUSLY injured if you do
not follow directions.
sparks from the ignition system. Store fuel in approved
containers, in well-ventilated areas and away from sparks and
flames. NEVER use fuel as a cleaning agent.
Gasoline engine exhaust gases contain
poisonous carbon monoxide. This gas is
colorless and odorless, and can cause
death if inhaled. NEVER operate this
equipment in a confined area or enclosed
Gasoline
vapors can cause an explosion if ignited.
DO NOT start the engine near spilled fuel
or combustible fluids. DO NOT fill the fuel
tank while the engine is running or hot.
DO NOT overfill tank, since spilled fuel
is extremely flammable, and its
WARNING - BURN HAZARDS
WARNING
You COULD be KILLED or SERIOUSLY injured if you
do not follow directions.
Engine components can generate extreme
heat. To prevent burns, DO NOT touch these
areas while the engine is running or
immediately after operations. NEVER operate
the engine with heat shields or heat guards
removed.
CAUTION
You CAN be injured if you do not follow directions
PAGE 8 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — SAFETY MESSAGE ALERT SYMBOLS
WARNING - ROTATING PARTS
NEVER operate equipment with covers,
or guards removed. Keep
hair
and clothing away from all moving
parts to prevent injury.
fingers, hands
CAUTION - ACCIDENTAL STARTING
ALWAYS place the Engine ON/OFF switch
in the OFF position and remove the ignition
key when the pump is not in use.
CAUTION - OVER-SPEED CONDITIONS
NEVER tamper with the factory settings of
the engine governor or settings. Personal
injury and damage to the engine or
equipment can result if operating in speed
ranges above maximum allowable.
CAUTION - RESPIRATORY HAZARDS
,
ALWAYS wear approved
protection.
respiratory
CAUTION - SIGHT AND HEARING HAZARDS
ALWAYS wear approved
hearing
protection.
eye
and
CAUTION - EQUIPMENT DAMAGE MESSAGES
Other important messages are provided throughout this manual
to help prevent damage to your concrete pump, other property,
or the surrounding environment.
NOTE
This
pump
, other property, or the
surrounding environment could
be damaged if you do not follow
instructions.
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 9
C-30HDNI (PRECISION) PUMP — RULES FOR SAFE OPERATION
■
DANGER - Read This Manual!
Failure to follow instructions in this manual may lead to serious
injury or even death! This equipment is to be operated by
trained and qualified personnel only! This equipment is for
industrial use only.
The following safety guidelines should always be used when
operating the Mayco C-30HDNI Concrete Pump:
General Safety
■
DO NOT operate or service this equipment
before reading this entire manual.
■
ALWAYS read, understand, and follow
procedures in Operator’s Manual before
attempting to operate equipment.
■
ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using pump
■
This equipment should not be operated by persons under 18
years of age.
■
ALWAYS read, understand and follow procedures in
Operator’s Manual before attempting to operate equipment.
■
ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using pump
■
NEVER operate this equipment without proper protective
clothing, shatterproof glasses, steel-toed boots and other
protective devices required by the job.
Whenever necessary, replace nameplate, operation and safety
decals when they become difficult read.
■
Manufacture does not assume responsibility for any accident
due to equipment modifications.
■
NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to the
equipment and/or injury to user may result.
■
NEVER touch the hot exhaust manifold, muffler or cylinder.
Allow these parts to cool before servicing engine or
concrete pump.
■
High Temperatures – Allow the engine
to cool before adding fuel or performing
service and maintenance functions.
Contact with
serious burns.
■
The engine section of this concrete pump requires an
adequate free flow of cooling air.
pump in any enclosed or narrow area where free flow of the
air is restricted. If the air flow is
restricted it will cause serious
damage to the concrete pump
or engine and may cause injury
to people. Remember the
concrete pump's engine gives
off
DEADLY
gas.
■
ALWAYS refuel in a well-ventilated area, away from sparks
and open flames.
hot!
components can cause
NEVER
carbon monoxide
operate the concrete
■
ALWAYS use extreme caution when working with flammable
liquids. When refueling, stop the engine and allow it to cool.
■
NEVER operate this equipment when not feeling
well due to fatigue, llness or taking medicine.
■
NEVER operate this equipment under the
influence of
drugs
or
alcohol
.
DO NOT
explosion could result from fuel vapors, or if fuel is spilled on
a hot engine.
■
NEVER operate the concrete pump in an
explosive atmosphere or near
combustible materials. An explosion or fire
could result causing severe
smoke
around or near the machine. Fire or
bodily harm
or even death.
■
Topping-off to filler port is dangerous, as it tends to spill fuel.
■
ALWAYS wear proper respiratory (mask),
hearing and eye protection equipment when
operating the concrete pump.
PAGE 10 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
■
Stop the engine when leaving the concrete pump unattended.
■
DO NOT leave the pump unattended. Use chock blocks if
parking pump on a grade.
■
Maintain this equipment in a safe operating condition at all
times.
C-30HDNI (PRECISION) PUMP — RULES FOR SAFE OPERATION
■
CAUTION must always be observed while servicing this
pump. Rotating parts can cause injury if contacted.
■
ALWAYS stored the pump in a clean, dry location out of the
reach of children.
■
ALWAYS use extreme care when operating near obstructions,
on slippery surfaces, grades and side slopes.
■
Unauthorized equipment modifications will void all
warranties.
■
Refer to the
questions or information.
■
Before start-up, check the hopper and remove all obstructions.
■
Keep all hands out of the hopper when the engine is running.
■
DO NOT operate the pump with the hood open.
■
Replace any worn or damaged pump components
immediately.
■
ALWAYS turn the engine
before performing maintenance.
■
ALWAYS make sure pump is correctly secured to the trailer.
Check all supports attaching the pump to the trailer and make
sure they are tight.
■
ALWAYS make sure that the pump's trailer is placed on solid
level ground so that it cannot slide or shift around, endangering
workers. Place blocks under the trailer's bumper to make it
level (prevents tipping), and use a chocked block underneath
the wheels to prevent rolling. Also keep the immediate area
free of bystanders.
Engine Owner's Manual
OFF
for engine technical
before performing must be
■
A copy of this manual shall accompany the pump at all times.
■
DO NOT use worn out hoses or couplings; inspect daily.
■
DO NOT disconnect the hose couplings or nozzle while they
are under pressure. Relieve the pressure by manually
swinging the clamp arm latch handle to the first open position
at the exhaust cone outlet.
■
The pump should NEVER be towed in excess of 45 MPH (or
less depending on road conditions).
■
If hose lines are
kinked
pressure could straighten out the kink or force out the blockage.
This rapid surge of material could cause the lines to
whip
■
Inspect the hose lines at all times
■
DO NOT tow the pump with the hopper full of material.
■
DO NOT tow the pump with the hoses attached.
■
NEVER disconnect any
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.
blocked
when starting up or during pumping cycle, the pump
for any reason, or if the lines are
move or
in a manner that could cause injury to personnel.
emergency or safety devices
.
■
Before towing, check the hitch and secure the safety chain to
the towing vehicle. Also check for proper tire pressure.
■
Tow only with a vehicle and hitch rated to tow a 2,950 lbs.
(1,338 Kg) load.
■
If pump is equipped with ball hitch coupler, use only a 2” all
steel ball rated for a minimum of 5000 lbs. Use a 1” hardened
steel pull pin, if the pump is equipped with a pin hitch.
■
ALWAYS check the machine for loosened threads or bolts
before starting.
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 11
C-30HDNI (PRECISION) PUMP — RULES FOR SAFE OPERATION
Maintenance Safety
■
NEVER lubricate components or attempt service on a running
machine.
■
ALWAYS allow the machine a proper amount of time to cool
before servicing.
■
Keep the machinery in proper running condition.
■
Fix damage to the machine immediately and always replace
broken parts.
■
Dispose of hazardous waste properly. Examples of potentially
hazardous waste are used motor oil, fuel and fuel filters.
■
DO NOT use food or plastic containers to dispose of
hazardous waste.
■
DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
Lifting
■
The pump has an operating weight of approximately 2,950
lbs. (1,338 Kg). Use lifting equipment capable of lifting this
weight.
Emergencies
■
ALWAYS know the location of the nearest
and
first aid kit
Also know the phone numbers of the nearest
doctor
invaluable in the case of an emergency.
and
. Know the location of the nearest telephone.
fire department
. This information will be
fire extinguisher
ambulance
,
PAGE 12 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
NOTES
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 13
C-30HDNI (PRECISION) PUMP — TOWING GUIDELINES
Towing Safety Precautions
CAUTION - Local Towing Regulations
Check with your county or state safety towing regulations
department before towing your concrete pump.
To reduce the possibility of an accident while transporting the
pump on public roads, always make sure that the trailer and the
towing vehicle are in good operating condition and both units
are mechanically sound.
The following list of suggestions should be used when towing
the pump:
■
Make sure that the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer "gross vehicle
weight rating" (GVWR).
■
ALWAYS inspect the hitch and coupling for wear. NEVER
tow the light tower's trailer with defective hitches, couplings,
chains etc.
■
CHECK the tire air pressure on both the towing vehicle and
the trailer. Also check the tire tread wear on both vehicles.
■
ALWAYS make sure the trailer section of the pump is
equipped with a "Safety Chain".
■
ALWAYS attach trailer's safety chain to frame of towing
vehicle.
■
ALWAYS make sure that the vehicle and trailer directional,
backup, brake, and trailer lights are connected properly and
are working properly.
■
Remember in most cases the maximum speed unless
otherwise posted for highway towing is 45 MPH, however
before towing your pump, check your local state, and county
vehicle towing requirements. Recommended off-road towing
is not to exceed 10 MPH or less depending on type of terrain.
■
Place
chocked blocks
while parked.
■
Depending on soil conditions and location it may be
necessary to place
bumper to prevent
■
Inflate tires to correct pressure, inspect tires for cuts, and
excessive wear. See Table 3 (Tire Wear Troubleshooting).
underneath wheel to prevent
support blocks
tipping
, while parked.
underneath the trailer's
rolling,
■
Check wheel mounting lug nuts with a torque wrench.
Torque wheel lug nuts as described in the "
Requirements
■
Make sure brakes are synchronized and functioning properly.
■
Check tightness of suspension hardware (nuts and bolts).
■
Avoid sudden stops and starts. This can cause skidding, or
jackknifing. Smooth, gradual starts and stops will improve
gas milage.
■
Avoid sharp turns to prevent rolling.
■
Retract wheel stand when transporting.
■
DO NOT transport pump with fuel in the fuel tank.
CAUTION -
If the trailer coupler is deformed replace entire coupler. NEVER
tow the pump with a defective trailer coupler. There exist the
possibility of the trailer separating from the towing vehicle.
Pump Trailer Vehicle Connection
1. Check the vehicle hitch ball, and trailer coupler for signs of
wear or damage. Replace any parts that are worn or
damaged before towing.
2. Use only the 2-inch ball diameter with a towing capability of
5,000 lbs. (2,268 kg) as indicated on the trailer's coupler.
Use of any other ball diameter will create an extremely
dangerous condition which can result in separation of the
coupler and ball or ball failure.
3. Be sure the coupler is secured to the hitch ball and the lock
lever is down (locked).
4. Attach safety chains as shown in Figure 2. Remember to
cross
5. After towing for about 50 miles recheck the entire towing
system for tightness.
Recommended Maintenance
1. Smear ball socket and clamp face with chassis grease.
Periodically oil pivot points and were surfaces of coupler
with SAE 30 W motor oil.
2. When parking or storing the concrete pump, keep the coupler
off the ground so dirt and other debris will not build up in the
ball socket.
Lug Nut Torque
", Table 5.
Never Use Defective Couplers
the safety chains.
PAGE 14 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — TOWING GUIDELINES
Figure 2 shown below illustrates the typical towing application
that should be used when towing the pump.
Figure 2. Towing Applications
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 15
C-30HDNI (PRECISION) PUMP — TRAILER SAFETY GUIDELINES
Trailer Safety Precautions
CAUTION -
ALWAYS make sure that the trailer is in good operating condi-
tion. Check the tires for proper inflation and wear. Also check the
wheel lug nuts for proper tightness.
This section is intended to provide the user with trailer service
and maintenance information. Remember periodic inspection of
the trailer will ensure safe towing of the equipment and will
prevent damage to the equipment and personal injury.
It is the purpose of this section to cover the major maintenance
components of the trailer. The following trailer components will
be discussed in this section:
■
Tires
■
Lug Nut Torquing
■
Suspension
■
Electrical
General Trailer Safety
The following list defines the major trailer components:
1. Fuel Cell – Provides an adequate amount of fuel for the
equipment in use. Fuel cells must be empty when transporting equipment.
2. Frame Length – This measurement is from the ball hitch to
the rear bumper (reflector).
3. Frame Width – This measurement is from fender to fender.
4. Jack Stand – Trailer support device with maximum pound
requirement from the tongue of the trailer.
5. Coupler – Type of hitch used on the trailer for towing. This unit
employes a 2 in. ball.
6. Tires Size – Indicates the diameter of the tire in inches (10,
12, 13, 14, etc. ), and the width in millimeters (175, 185, 205
etc.). The tire diameter must match the diameter of the tire rim.
This unit employes 7.35 x 14 in. tires.
7. Tires Ply – The tire ply (layers) number is rated in letters:
2-ply, 4-ply, 6-ply, 8-ply, 10-ply etc. This unit employes
4-ply tires.
8. Wheel Hub – The wheel hub is connected to the trailer's axle.
9. Tire Rim – Tires are mounted on a tire rim. The tire rim must
match the size of the tire.
10. Lug Nuts – Used to secure the wheel to the wheel hub.
Always use a torque wrench to tighten down the lug nuts. See
Table 5 and Figure 4 for lug nut tightening and sequence. This
unit employes 5 lug nuts to secure the wheel to the hub.
11. Axle – This trailer employes a torsion bar type suspension,
which can support 3,500 lbs.
12. Electrical – Electrical connectors (looms) are provided with
the trailer so that brake lights and turn signal lights can be
connected to the towing vehicle. See
for proper wiring connections.
Trailer Wiring Diagram
PAGE 16 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — TRAILER SAFETY GUIDELINES
Tires/Wheels/Lug Nuts
Tires and wheels are a very important and critical components
of the trailer. When specifying or replacing the trailer wheels it is
important the wheels, tires, and axle are properly matched.
CAUTION -
DO NOT attempt to repair or modify a wheel. DO NOT install
an inter-tube to correct a leak through the rim. If the rim is
cracked, the air pressure in the inter-tube
may cause pieces of the rim to explode
(break-off) with great force and can cause
serious eye or bodily injury.
Tires Wear/Inflation
Tire inflation pressure is the most important factor in tire life.
Pressure should be checked cold before operation. DO NOT
bleed air from tires when they are hot. Check inflation pressure
weekly during use to insure the maximum tire life and tread wear.
Table 3 (Tire Wear Troubleshooting) will help pinpoint the causes
and solutions of tire wear problems.
NOTE
General Trailer Safety
ALWAYS
removing or installing force fitted
parts. Failure to comply may result in
serious injury.
wear safety glasses when
Torsion Bar Suspension
The torsion bar suspension and associated hardware
(Figure 3) should be visually inspected every 6,000 miles for
signs of excessive wear, elongation of bolt holes, and loosening
of fasteners. Replace all damaged parts (suspension) immediately.
Figure 3. Major Suspension Components
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 17
C-30HDNI (PRECISION) PUMP — TRAILER SAFETY GUIDELINES
Lug Nut Torque Requirements
It is extremely important to apply and maintain proper wheel
mounting torque on the trailer. Be sure to use only the fasteners
matched to the cone angle of the wheel. Proper procedure for
attachment of the wheels is as follows:
1. Start all wheel lug nuts by hand.
2. Torque all lug nuts in sequence (Figure 4). DO NOT torque
the wheel lug nuts all the way down. Tighten each lug nut in
3 separate passes as defined by Table 4.
3. After first road use, retorque all lug nuts in sequence. Check
all wheel lug nuts periodically.
stnemeriuqeReuqroTeriT.5elbaT
eziSleehWssaPtsriF
SBL-TF
"2152-0204-5356-05
"3152-0204-5356-05
"4152-0206-05021-09
5152-0206-05021-09
"
"6152-0206-05021-09
ssaPdnoceS
SBL-TF
ssaPdrihT
SBL-TF
Figure 4. Wheel Lug Nuts Tightening Sequence
NOTE
NEVER!
use an pneumatic air gun
to tighten wheel lug nuts.
PAGE 18 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
NOTES
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 19
C-30HDNI (PRECISION) PUMP — OPERATION AND SAFETY DECALS
Figure 5 display's the operation and safety decals as they appear on the concrete pump, should any of these decals become
damaged or unreadable, contact the Multiquip Parts Department for a replacement set.
Figure 5. Operation and Safety Decals
PAGE 20 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — IMPORTANT HAND SIGNALS
Figure 6 display's the basic hand signals commonly used in concrete pumping operations.
Figure 6. Operation Hand Signals
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 21
C-30HDNI (PRECISION) PUMP — PUMP COMPONENTS
Figure 7. Major Pump Components
PAGE 22 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — PUMP COMPONENTS
Figure 7 illustrates the location of the major components for the
C-30HDNI Concrete Pump. The function of each component is
described below:
1. Discharge Cone – Connect 3" elbow to this discharge
port, then connect 3" x 2" reducer to elbow.
2. Discharge Cone Safety Latch – When towing of the pump
is required, ALWAYS secure the discharge cone to latch
located on the manifold.
3. Rear Running Lights – ALWAYS check and make sure
both the right and left running lights are functioning correctly
before towing the pump.
4. Hopper – Concrete from a Redi-Mix truck is poured into
this hopper. The hopper can hold 6.0 cu. ft of concrete.
NEVER put hands or any other parts of you body into the
hopper.
5. Safety Grill – The safety grill should be locked at all times
when the pump is being towed. Under normal working
conditions, raise and place the safety grill on the support
hooks which are located on splash guard.
6. Shaft Pulley V-Belt – ALWAYS inspect the drive shaft V-
belt for wear and alignment. A defective or misaligned Vbelt can wear prematurely and adversely affect the
performance of the pump. Replace with only manufactures
recommended type V-belt.
7. Distributor – NEVER allow concrete, water or any foreign
debris to come in contact with the distributor.
8. Compartment Hood – NEVER operate the pump with the
hood removed. Installed on the pump frame is a safety interlock device which prevents the engine from starting if the
hood is removed or in the up position (open).
9. Hood Fastener – When the hood is in the down position,
secure the rubber latch to this fastener.
10. Hood Lift Handle – Grip this handle, pull upward then
back to raise the compartment hood.
11. Control Box – Contains the mechanical and electrical
components required to run the pump. Below is a list of
those components:
■
Throttle Control
■
Low Oil Pressure Indicator
■
Battery Charge Indicator
■
Water Temperature Indicator
■
Ignition Switch
■
Remote Connector
12. Radiator/Cap – Fill with a water/anti-freeze type solution
as recommended in the maintenance section of this manual.
ALWAYS
operating level before starting the engine.
13. Fuel Tank/Cap – Fill with unleaded fuel. Fuel tank (cell)
holds approximately 11 gallons (42 liters). DO NOT top off
fuel. Wipe up any spilled fuel immediately
14. Tow End Jack Stand – Use this jack stand to level and
support the pump.
15. Tow Hitch Coupler – Requires a 2-inch ball hitch or a 3inch pintle. Capable of towing 5,000 lbs.
16. Safety Chain – ALWAYS attach safety chain to the towing
vehicle. NEVER! tow the pump with the safety chain
unattached.
17. Engine Stop Device – This device will prevent the starting
of the engine when the compartment hood is in the UP
position. The compartment hood must be in the DOWN
position in order for the engine to start.
18. Grease Port Console – This console allows for the remote
lubrication of components on the pump.
19. Access Door – There are four access doors on the pump.
Remove these door to gain access to drive and piston
assemblies when maintenance is required.
20. Drive Chain – Keep this chain properly lubricated and
aligned at all times. Lubricate this chain as specified in the
maintenance section of this maintenance.
21. Rubber Latch – Secure this rubber latch to the hood
fastener whenever the pump is in use or being towed.
22. Tires Ply– The tire ply (layers) number is rated in letters;
This trailer uses 4-ply tires.
23. Chock Blocks – Place these blocks (not included as part
of your concrete pump package) under each trailer wheel
to prevent rolling.
24. Pump End Jack Stand – Use this jack stand to level and
support the pump.
25. Discharge Cone Release Lever – secures the discharge
cone to the "Y" manifold; also relieves manifold pressure.
26. Documentation Box – Contains engine and pump
operation, parts and maintenance information.
27. Lubrication Box – This box is empty when shipped from
the factory. Please fill with 7 gallons ( 26.5 liters) of SAE
motor oil for first time use. Also check the dual clean-out
point on bottom of lubrication box for a secure tight fit.
make sure that the radiator is filled to the proper
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 23
C-30HDNI (PRECISION) PUMP — CONTROL BOX COMPONENTS
Figure 8. Pump Control Box Components
Figure 8 illustrates the location of the major components for the
C-30HDNI Control Box. The function of each component is
described below:
1. Throttle Control Switch – This is a variable speed type
control. Holding the control switch to the
engine speed. To place the engine at IDLE speed, hold the
control switch to the
minutes.
2. Trouble Indicator LED– This is a diagnostic feature on the
C-30HDNI to assist the operator with identifying problems
that occur with the fuel injection system (See Table 7).
3. Oil Pressure Indicator Lamp – In the event of low oil in the
engine crankcase or low oil pressure, the oil "
Lamp
" indicator will be lit. STOP the engine immediately if
this lamp is lit.
4. Battery Charge Indicator Lamp – Indicates if the electrical
system is charging properly. If the "
Lamp
" is lit, this is an indication that the charging system is
malfunctioning. STOP the engine and remedy the electrical
charging problem.
right
NEVER
run the engine when this lamp is on.
and let the engine run for 3-5
Battery Charge Indicator
left
increases the
Oil Pressure
5. Water Temperature Lamp – In the event of high engine
water temperature (220 degrees Fahrenheit), this lamp will
be lit. STOP the engine immediately if this lamp comes on.
NEVER
6. Ignition Switch – Insert the ignition key here to start the
engine. Turn the key clockwise to the ON position, then
continue turning clockwise to the START position and
release. To stop the engine turn the key fully counterclockwise to the
7. Remote Control Input Connector – Insert the remote
control input cable into this connector.
8. Pumping Control Switch – This 3-position switch controls
the pumping of the pump. The
with the remote control unit, the
(prevents pumping), and the
normal pump operation.
9. Hourmeter– Display's the number of hours the pump has
been in use.
run the engine when this lamp is on.
STOP position.
left most
right most
position is for use
center
position is for off
position is for
PAGE 24 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — ENGINE COMPONENTS
TOP VIEWFRONT VIEW
Figure 9. Nissan Model A15 Basic Engine Components
Figure 9 illustrates the location of the basic components for the
NISSAN A-15 Engine.The function of each component is
described below:
1. Oil Filter – Replace this filter as recommended in the
maintenance section of this manual
2. Oil Pressure Switch – In the event of low oil level, this
switch will shutdown the engine.
3. Starter Motor/Solenoid – NEVER
foreign debris to come in contact with the starter motor/
solenoid.
4. Fan V-Belt – ALWAYS make sure that V-belt is properly
tensioned. A loose or defective V-belt can adversely affect
the performance of the pump.
5. Alternator – Provides power to the electrical system.
Replace with only manufactures recommended type
alternator.
6. Air Cleaner – Prevents dirt and other debris from entering
the fuel system. Remove wing-nut on top of air filter
cannister to gain access to filter element. Replace with only
manufactures recommended type air cleaner.
7. Cooling Fan Blades – Make sure that the blades of the
cooling fan are not
can cause the engine to run hot and overheat.
bent or broken
allow concrete or any
. A damaged fan blade
8. Crankcase Drain Plug – Remove this plug to drain engine
9. Fuel Pump/Fuel Filter – Replace or clean the fuel pump
10. Distributor – NEVER
11. Spark Plug – Provides spark to the ignition system. Set
12. Dipstick – Remove this dipstick to determine if engine oil
13. Oil Filler Port Cap – Remove this cap to add engine oil to
14. Fuel Injection System – ALWAYS keep dirt, dust, and any
oil from the crankcase. Replace with recommended engine
oil as specified in the maintenance section of this manual.
or fuel filter as specified in the maintenance section of this
manual.
allow concrete or any foreign debris
to come in contact with the distributor.
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch). Clean
spark plug once a week.
is low. Maintain oil level at the "H" marking on the dipstick.
NEVER run engine with low oil.
the crankcase. Fill with recommended type oil as specified
in the maintenance section of this manual
foreign debris from entering the fuel injection system. Clean
the fuel injection system as recommended in the
maintenance section of this manual.
Operating the engine without an air
NOTE
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 25
filter, with a damaged air filter, or a
filter in need of replacement will allow
dirt to enter the engine, causing rapid
engine wear.
C-30HDNI (PRECISION) PUMP — GENERAL INFORMATION
The following operating principles and operating suggestions
should prove helpful in the successful operation of your concrete
pump. Your new “small line” concrete pump has been designed
to give you many years of service when operated properly. A
study of the following paragraphs is important to the successful
operation of your new Direct-flow Concrete Placer.
All concrete pumps require a high level of operator skill and
more frequent service than most of the other construction
equipment. The highly abrasive nature of concrete under pressure
makes it extremely important that expendable wear components
be inspected at regular intervals between jobs to prevent having
to replace these items during a pour.
Experience has proved that inconsistency of batched concrete
mixes and frequent moving of the line requires the operator to be
readily available at all times during pumping to stop the pump
and prevent abuse to the unit which may occur if unexpected
blockages develop.
Pump Mix Guidelines
When ordering concrete, be certain to advise the concrete supplier
that you require a “
pump a wide variety of materials, but certain basic principles
must be followed to assure successful pumping, as follows:
Generally speaking, the washed concrete sand and #4 aggregate
(pea gravel) should conform to A.S.T.M. standards in regard to
sieve analysis. Sands in some areas are washed clean of the
#100 and #200 mesh fines, which results in separation and
jamming in the manifold while pumping under pressure.
If this condition develops, check with your concrete suppliers
engineers and get their recommendations for supplementing
the lack of the fines. The use of locally accepted ad-mixes may
be required. (For example, Pozzolith, Bentonite Clay, Plastiments,
etc.) When properly prescribed, additives form the plastic paste
sometimes necessary to hold the cement and aggregate together.
NOTE
Determine the cause of jamming, correct it and resume pumping.
Trying to force material through under jammed conditions may
result in damage to the drive system, thus voiding any warranty
services.
pump mix
”. The Direct-flow manifold will
If jamming conditions in the pump or
hose occur for any reason at all, do
not attempt to use more power to
correct the condition.
As a general rule, the use of approximately six sacks of cement,
70% washed concrete sand and 30% #4 pea gravel per yard of
concrete will result in a pumpable mix. The ideal nature of sand
and rock in certain areas may permit you to increase the
percentage of rock or adjust the mix considerably to meet the job
requirements. When possible, you may experiment with various
mixes in your area to determine the degree of versatility of the
Direct-flow Pump.
Uniform gradation of the washed concrete sand and the 1/2”
minus aggregate along with sufficient cement content and water
are important to a successful pump operation.
A recommended pumpable mix design would be 70% sand and
30% aggregate-cement content to be a minimum of 6 sacks.
(564 lbs.)
NOTE
Sample Design Mix - 3000 Psi 3/8 in. Slump 4- 5 in.
Type II Cement 6.49 sack/cu. yd 611 lbs.
Sand Sat. Surf. Dry 2000 lbs.
#4 Gravel Sat. Surf. Dry 864 lbs.
#3 Gravel Sat. Surf. Dry 0 lbs.
Water 48 Gallons 400 lbs.
Admixture WRDA-79 26 oz.
Water 7.40 gal/sack
Test laboratory data has proven in many areas that the above
mix guidelines have produced concrete rated at 3000 psi (28
day test) and upwards of 5000 psi with an increase in cement.
In some areas where the gradation of sand and rock is ideal and
sufficient cement is used along with admixtures, the Mayco small
line concrete pump will handle up to a 50-50 ratio of sand and
rock.
When the mix is designed for wet gunning applications, it is
normal to increase the cement (up to 7.5 or 8 sacks) and change
the sand to rock ratio to 85% sand and 15% rock.
The Mayco concrete pump will valve efficiently when using
cellular-foam concrete mixes upwards of 70 lbs. per cubic foot
wet density. (Below 70 lbs. materials (roof decks) the valving
becomes inefficient.)
Your local sand and rock engineers
will give you the S.S.D. weights of
sand and rock required in your local
area which will yield one cubic yard
per the above recommendation.
Total Weight 3,906 lbs
PAGE 26 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — HOW IT WORKS
The C-30HDNI concrete pump has one main pumping piston
which is valved by means of two ball checks. (A inlet, and B
outlet.)
The secondary piston is used as a compensator piston to smooth
out the pulsations of a single piston action. Note: The compensator
will not start operating until material is pumped into the line and
back pressure develops.
The
compensator spring
piston rod, deflects with each piston stroke. This “
in conjunction with the cam profile, produces and uninterrupted
smooth flow of material under average pumping conditions.
The pumping cylinder (Figure 10) retracts drawing the material
past the ball (A) and filling the cylinder. The compensator piston
is pumping the material out to the nozzle and causing ball (B) to
seat preventing the material from returning to the pumping cylinder
intake.
, which is installed on the compensator
spring cushion
An automatic, centrifugal clutch is installed to engage and
disengage the pumping action without stopping or starting the
engine. The
idle speed is approximately 875 R.P.M.; therefore, the clutch is
completely disengaged at idle. The throttle settings while pumping
should always maintain an engine R.P.M. high enough to prevent
the clutch from slipping and burning the clutch lining.
The return spring which is installed on the rocker arm, is installed
to eliminate shock and stress between the cam roller and the
”,
cam weldment when the pump is in operation. If the return spring
is removed or replaced for any reason, maintain the backing
plate dimension of 3” as shown on Figure 3, to produce the
proper pre-loading of the spring for a smooth performance.
centrifugal clutch
is set at 1100 R.P.M. The engine
Figure 10. Pumping Cylinder
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 27
C-30HDNI (PRECISION) PUMP — HOW IT WORKS
The pumping piston (Figure 11) is forcing the material past ball (B) and out to the nozzle, also seating ball A so that the material will
not flow back to the hopper. This action also fills the compensating piston for the next stroke.
Figure 11. Pumping Pistons
Figure 12 shows the relationship between the return spring, the compensator spring and the rocker arm to maintain a smooth
performance. DO NOT tighten the bolt (Item 1) completely, the rod end must be able to move.
The return spring is installed to eliminate shock and stress between the cam roller and the cam weldment when the pump is in
operation. If the
produce proper pre-loading of the spring for a smooth performance.
return spring
is removed or replaced for any reason, maintain the backing plate dimension (3-inches) as shown to
Figure 12. Return Spring, Compensator Spring and
Rocker Arm Interaction
PAGE 28 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
C-30HDNI (PRECISION) PUMP — OPERATING INFORMATION
OPERATING SUGGESTIONS
1. A well-planned location of the pump and routing of the hose
before starting a pour may save subsequent moves throughout the job.
2. Before concrete is discharged into the hopper, it is suggested
that 3 to 4 gallons of water be sprayed into the hopper,
followed by approximately 5 gallons of a creamy cement and
water slurry (1/2 bag of cement to 5 gallons of water). This
procedure lubricates the hose and prevents separation and
blockages in the hose.
Getting the concrete to flow through the
NOTE
hose at the start of the pumping cycle
can be one of the most critical operations of the pour. (
throttle when starting, NOT
Manually
operate the
remotely
)
C. If it is necessary to wait 10 minutes or more for another
D. When pumping stiff mixes and there is waiting time
E. When the pumping job requires a stiffer mix, the follow-
WARNING - Hose Blockage Hazard
If hoses or lines are
kinked
when starting up or during the pumping cycle, the
pump pressure could straighten out the kink or force out the
blockage. This rapid surge of material could cause the lines to
whip
or
move
Inspect the lines at all times to prevent the above
conditions
3. It is important that once the slurry procedure is completed,
and you have started concrete flowing through the hose, do
not stop the pour until all the slurry is pumped out and the
concrete has reached the end of the hose. The only time to
stop the pump at the start is if a blockage occurs.
4. When the pump is stopped for any reason during a pour; e.g.,
moving hose, waiting for redi-mix truck, the following suggestions are offered:
A. Leave the hopper full of concrete at the time of shutdown.
It is important not to let the
water into the hopper, as this could cause separation of
the concrete in the hopper.
blocked
in a manner that could cause injury to personnel.
for any reason, or if the lines are
5. Following the pump operation, proper wash out of all mate-
6. A thorough inspection of the drive components and greasing
redi-mix
driver wash too much
F. Hose sizing is very important: We strongly recommend
rials or “build-up” within the pump manifold and hoses will
prevent problems when starting the next job.
of all bearings after each job will ensure adequate lubrication
and service to the pump which is normally operating in wet,
gritty conditions.
NOTE
load of concrete, it is wise to start the pump and pump 6
or 8 strokes every 5 minutes to prevent setting of the mix
in the system. If waiting time is excessive, it would be wise
to wash out the pump and hoses and start over when the
new truck arrives.
between redi-mix trucks, it is advisable to add some
water to the last hopper of material and “hand mix” to
ensure an easier start with the following load.
ing method is suggested for starting: Take a water hose
with a nozzle on it and apply water with a fine spray to the
concrete as it comes down the redi-mix chute into the
pump hopper after the slurry procedure is completed and
you are ready to start pumping.
Using this procedure will make it easier to pump through
the clean hose. Note: Once the concrete has reached the
end of the hose, do not apply any more water in this
manner as this procedure is used on the start only.
on harsh mixes, vertical pushes, stiff concrete, shotcrete,
long pushes, that a 2 -1/2” line be used as far as possible.
The advantages of using the 2 -1/2” line are improved
pumpability, less pumping pressure and less wear on the
pump.
Over-greasing any
Mayco pump will not damage the
bearing.
bearing
on your
B. If the
MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12) — PAGE 29
shutdown
the engine so the vibration does not separate the mix in
the hopper which can cause a blockage in the manifold
when the pump is started.
period exceeds 2 to 3 minutes, turn off
C-30HDNI (PRECISION) PUMP — OPERATING INFORMATION
WARNING - Hose Blockage Hazard
If you repeatedly pull the throttle all the way out and try to force
your pump to push through
material in the hose or manifold, you will soon have
breakdowns and costly repairs which are not covered under
warranty.
If a blockage occurs, find where it is and clear it before further
pumping. DO NOT increase the engine speed to clear the
blockage. Increasing the engine speed will only compound
the problem.
WARNING -
It will be necessary at times to move your pump from one job
site location to another. Before moving the pump, make sure to
pump the remaining concrete out of the hopper. Moving the
pump with a
or breakage of the axle and axle springs, excess strain and
pressure on the hub and bearing assembly.
New Pumps
All new pumps are “
shipment. This procedure permits a thorough inspection of the
entire drive system and valving under simulated full load conditions.
The pump owner can do the same by attaching an adaptor couple
to the end of the discharge cone; e.g., the use of a standard 2 in.
pipe cap with a 3/8 in. hole drilled in the center, screwed on to the
end of the hinged cone or reducer at the pump.
Fill the hopper with water after making sure that all sand and rock
have been removed from the manifold. Operate the pump at full
throttle and the 3/8 in. diameter hole restriction will create sufficient
back-pressure to make a thorough inspection of all moving parts.
Pumping Tips
1. The effects of heat and excessive time on concrete: Hot
concrete, commonly referred to as a hot load, is concrete that
has been in the redi-mix truck in excess of 2 to 3 hours. On a
hot day, this amount of time is even less. A brief explanation
of why heat and time affect concrete:
Concrete starts setting by drying up through a chemical
reaction. The catalyst to this reaction is heat. When pumping
a hot load, it is important to remember that when you have to
stop pumping for any reason, add water to the concrete in the
hopper and hand mix and move concrete in the hose every
5 minutes. If the shut down time becomes too long, wash out
immediately.
full hopper
Moving The Pump On The Job Site
water pressure tested
blockages
of concrete can cause severe damage
due to separation of
” at the factory before
2. ADMIXTURES
Remixtures that are designed into the concrete mix by the
redi-mix company or an architectural engineering company.
This section lists common admixtures and a brief explanation
of their functions:
A. Pozzolith 300 – or the equivalent acts as a water
B. MBVR – air entraining, acts as a lubricant.
C. Calcium Chloride – commonly referred to as C.C., is
D. Super Plasticizers – acts as an accelerator. The
E. Red Label – acts as a water retarder and an accelerator.
F. Fly Ash – is used to help increase the strength of the
NOTE
3. When pumping long distance or pumping stiff mixes, you can
expect a drop in volume compared to shorter lines and wetter
mixes due to the change in valve efficiency or cavitation.
4. Leaking manifold seals or hose coupling gaskets which leak
water can cause separation and subsequent jamming at that
point.
5. Damaged hoses with internal restrictions can cause blockages.
retarder and a lubricant. On a lean mix, long pushes, stiff
mixes, and vertical pushes, Pozzolith 300R helps
pumpability.
used as an accelerator. When pumping a load with
calcium chloride, it is recommended that you wash out
if the waiting time between delivery trucks becomes too
long.
concrete will look very wet after the super plasticizer is
added, but will begin to set up very fast. Wash out
immediately if you do not have a truck waiting. Super
plasticizers are used mainly on commercial jobs.
Red label will be used mainly on commercial jobs.
concrete and decrease the cement content per yard. This
is one of the most common admixtures used.
All admixtures will be shown on the
redi-mix concrete ticket. Before starting the pumping job, ask the driver of
the redi-mix truck to see the concrete
ticket and note the admixtures that
exist and take the proper action.
PAGE 30 — MAYCO C-30HDNI (PRECISION) PUMP — OPERATION AND PARTS MANUAL — REV. #7 (04/03/12)
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