MULTIQUIP MC-42S Guide

OPERATION AND PARTS MANUAL
MC-42S
CONCRETE MIXER
Revision #9 (03/07/17)
FINAL REVISION
Go to Discount-Equipment.com to order your parts

Discount-Equipment.com is your online resource for quality parts & equipment.
Florida: 561-964-4949 Outside Florida TOLL FREE: 877-690-3101
Need parts?
Click on this link: http://www.discount-equipment.com/category/5443-parts/ and
choose one of the options to help get the right parts and equipment you are looking
for. Please have the machine model and serial number available in order to help us
get you the correct parts. If you don’t find the part on the website or on one of the
online manuals, please fill out the request form and one of our experienced staff
members will get back to you with a quote for the right part that your machine needs.
We sell worldwide for the brands: Genie, Terex, JLG, MultiQuip, Mikasa, Essick, Whiteman,
Mayco, Toro Stone, Diamond Products, Generac Magnum, Airman, Haulotte, Barreto,
Power Blanket, Nifty Lift, Atlas Copco, Chicago Pneumatic, Allmand, Miller Curber, Skyjack,
Lull, Skytrak, Tsurumi, Husquvarna Target, Stow, Wacker, Sakai, Mi-T-M, Sullair, Basic,
Dynapac, MBW, Weber, Bartell, Bennar Newman, Haulotte, Ditch Runner, Menegotti,
Morrison, Contec, Buddy, Crown, Edco, Wyco, Bomag, Laymor, EZ Trench, Bil-Jax, F.S.
Curtis, Gehl Pavers, Heli, Honda, ICS/PowerGrit, IHI, Partner, Imer, Clipper, MMD, Koshin,
Rice, CH&E, General Equipment ,Amida, Coleman, NAC, Gradall, Square Shooter, Kent,
Stanley, Tamco, Toku, Hatz, Kohler, Robin, Wisconsin, Northrock, Oztec, Toker TK, Rol-Air,
APT, Wylie, Ingersoll Rand / Doosan, Innovatech, Con X, Ammann, Mecalac, Makinex, Smith
Surface Prep,Small Line, Wanco, Yanmar

Go to Discount-Equipment.com to order your parts

PAGE 4 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — TABLE OF CONTENTS
Component Drawings
Nameplate and Decals.......................................34-35
Mixer Assembly (Steel Drum) ............................36-37
Mixer Assembly (Plastic Drum)..........................38-39
Main Frame Assembly .......................................40-41
Axle Assembly....................................................42-43
Cabinet Assembly ..............................................44-45
Gas Engine Mounting Plate Asasembly............46-47
Electric Motor Mounting Plate Asasembly ........46-47
Specification and part number
are subject to change without
notice.
NOTE
Multiquip MC-42S Concrete
Mixer
Here's How To Get Help............................................ 3
Table Of Contents ..................................................... 4
Parts Ordering Procedures ....................................... 5
Specifications ............................................................ 6
Dimensions (Mixer)................................................... 7
Safety Message Alert Symbols................................. 8
Rules For Safe Operation ....................................9-10
Operation and Safety Decals.................................. 11
General Information................................................ 12
Mixer Basic Components ........................................ 13
Basic Engine Components...................................... 14
Handwheel Assembly.............................................. 15
Towing Guidelines ................................................... 16
Safety Chain Connection ........................................ 17
Electric Motor .....................................................18-19
Pre-Inspection (Gasoline Engine)........................... 20
Initial Start-up (Gasoline Engine)............................ 21
Initial Start-up (Electric Motor)................................ 22
Operation ................................................................ 23
Maintenance (Engine)........................................24-25
Maintenance (Mixer)..........................................26-28
Troubleshooting (Engine)........................................ 30
Troubleshooting (Engine/Mixer).............................. 31
Explanation Of Code In Remarks Column.............. 32
Suggested Spare Parts........................................... 33
HONDA GX120K1QX2 ENGINE
Air Cleaner Assy.................................................48-49
Camshaft Assy. ..................................................50-51
Carburetor Assy. ................................................52-53
Control Assy. ......................................................54-55
Crankcase Cover Assy.......................................56-57
Crankshaft Assy. ................................................58-59
Cylinder Barrel Assy...........................................60-61
Cylinder Head Assy............................................62-63
Fan Cover Assy. .................................................64-65
Flywheel Assy.....................................................66-67
Fuel Tank Asssembly .........................................68-69
Ignition Coil Asssembly ......................................70-71
Muffler Asssembly..............................................72-73
Piston Rings Asssembly.....................................74-75
Recoil Starter Asssembly...................................76-77
Gasket Kit Assembly ..........................................78-79
Labels Asssembly ..............................................80-81
Terms and Conditions of Sale - Parts ................... 82
Go to Discount-Equipment.com to order your parts

PAGE 6 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — SPECIFICATIONS
)rotoMcirtcelE/enignE(snoitacificepS.1elbaT
cirtcelE/enignE rotoM
ledoM2XQ1K021XGADNOH6955-423F43rodlaB
epyT elgniS,ekorts4delooc-riA tfahSlatnoziroH,VHO,rednilyC enignEenilosaG
511esahp-elgniS,PH2/1 rotoMcirtcelE,CAV
ekortSXeroB .ni7.1X.ni7.2 )mm24xmm06( A/N
tnemecalpsiD)cc911(.ni.uc3.7A/N
tuptuOxaMmpr006,3/.P.H9.3.M.P.R5271/PH2/1
yticapaCknaTleuF)sretiL06.0(snollaG.S.U36.0A/N
leuFenilosaGelibomotuAdedaelnUA/N
yticapaCliOebuL)retil6.0(.tq36.0A/N
lortnoCdeepS dohteM epyTthgiew-ylFlagufirtneCA/N
dohteMgnitratStratSlioceRcirtcelE
egatloVtupnIA/NesahPelgniSCAV511
noisnemiD )HxWxL( .ni5.21X4.31x7.11 )mm813X143X792( .ni26.8X65.7x78.31 )mm912X291X253(
thgieWteNyrD ).gK0.31(sbl7.82).gk4.5(sbl21.xorppA
snoitacificepSrexiMS24-CM.2elbaT
thgieH )mm525,1(.ni06
htdiW )mm692,1(.ni15
htgneL )mm776,1(.ni66
yticapaCmurDmumixaM )sretil081(.tf.uc53.6
yticapaCgnixiMmumixaM )sretil311(.tf.uc0.4
yticapaCgaB )gab2/1ot3/1(
rotoMcirtcelE/enignEhtiW-thgieW ).gK422(.sbl594
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 7
MC-42S CONCRETE MIXER — DIMENSIONS (MIXER)
SeeTable 2 for mixer dimensions
Figure 1A. Mixer Dimensions
Go to Discount-Equipment.com to order your parts

PAGE 8 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
Accidental Starting
ALWAYS place the circuit breaker or power
ON/OFF switch in the OFF position when the
pump is not in use.
Respiratory Hazard
ALWAYS wear approved respiratory
protection.
Equipment Damage Messages
Other important messages are provided throughout this manual
to help prevent damage to your mixer, other property, or the
surrounding environment.
ALWAYS wear approved eye and hearing
protection.
Sight and Hearing hazard
MC-42S CONCRETE MIXER — SAFETY MESSAGE ALERT SYMBOLS
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.
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!
This Owner's Manual has been
developed to provide complete
instructionsforthesafeandefficient
operation of the Multiquip Model
MC-42S (Steel) Concrete Mixer.
Before using this mixer,
ensure that the operating
individual has read and
understands all instructions in
this manual.
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
theoperator, andare precededbyoneof threewords: DANGER,
WARNING, or CAUTION.
DANGER: You WILL be KILLED or
SERIOUSLY injured if you do not follow
directions.
WARNING: You CAN be KILLED or
SERIOUSLY injured if you do not follow
directions.
CAUTION: You CAN be injured if you
do not follow directions.
HAZARD SYMBOLS
Potentialhazardsassociated withthe MultiquipMC-42S concrete
mixer operation will be referenced with Hazard Symbols which
appear throughout this manual, and will be referenced in
conjunction with Safety Message Alert Symbols.
Rotating Parts
NEVER operate equipment with covers, or
guards removed. Keep fingers, hands, hair and
clothing away from all moving parts to prevent
injury.
NOTE
This mixer, other property, or the
surrounding environment could
be damaged if you do not follow
instructions.
NOTE
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 9
MC-42S CONCRETE MIXER — RULES FOR SAFE OPERATION
■ ALWAYS refuel in a well-ventilated area, away from sparks
andopenflames.
■ ALWAYS useextremecautionwhenworkingwithflammable
liquids.Whenrefueling,stop the engineandallowitto cool.
DONOT smokearoundornearthemachine.Fireorexplosion
could result from fuel vapors, or if fuel is spilled on a hot
engine.
■ NEVERoperatethemixerinanexplosive
atmosphere or near combustible
materials.Anexplosionorfirecouldresult
causing severe
bodily harm or even
death.
■ Topping-off to filler portisdangerous,as it tends to spill fuel.
■ Refer to the Engine Owner's Manual for engine technical
questions or information.
■ NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to
theequipmentand/orinjuryto user may result.
■ Manufacturerdoes notassumeresponsibilityforanyaccident
duetoequipmentmodifications.
■ NEVERtouchthehotexhaustmanifold,
mufflerorcylinder.Allowthesepartsto
coolbeforeservicingengineormixer.
■ The engine of this mixer requires an adequate free flow of
cooling air.
NEVER! operate the mixer in any enclosed or
narrow area where free
flowoftheairisrestricted.If
the air flow is restricted it
willcauseserious damage
to the mixer or engine and
maycauseinjurytopeople
and property. Remember
the mixer's engine
(gasoline models only)
givesoff DEADLY gases.
■ HighTemperatures –Allowtheengine tocoolbeforeadding
fuelorperformingserviceandmaintenancefunctions.Contact
with
hot componentscancauseserious burns.
DANGER:Failuretofollowinstructions inthismanualmay
lead to serious injury or even death! This
equipment is to be operated by trained and
qualifiedpersonnelonly!Thisequipmentis for
industrial useonly.
The following safety guidelines should always be used when
operating the MultiquipMC-42S ConcreteMixer:
GENERAL SAFETY
■ DO NOT operate or service this equipment before
readingthisentiremanual.
■ This equipment should not be operated by
personsunder18yearsofage.
■ NEVER operate this equipment without proper
protectiveclothing,shatterproof glasses, steel-
toedbootsandotherprotective devicesrequired
bythejob.
■ NEVERoperatethisequipmentwhennotfeeling
welldue tofatigue, illnessor takingmedicine.
■ NEVER operate this equipment under the
influenceor drugs or alcohol.
■ Whenever necessary, replace nameplate, operation and
safetydecalswhen they becomedifficultread.
■ ALWAYS check the machine for loosened threads or bolts
beforestarting.
■ ALWAYS wear proper respiratory (mask) hearing and eye
protectionequipmentwhenoperatingthemixer.
■ NEVER! place hands inside the drum while the drum is
rotating.
Go to Discount-Equipment.com to order your parts

PAGE 10 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
■ In emergencies 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.
■ 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.
■ If mixer is equipped with an electric motor, operate electric
motoronlyatthespecifiedvoltageindicatedonthenameplate.
■ Makesurethe OFF/ON powerswitchonthe electricmotoris
always inthe OFF positionbeforeinsertingthemixer'spower
plugintoanACreceptacle(electricmodelonly).
Maintenance Safety
■ NEVERlubricatecomponentsorattemptserviceonarunning
machine.
■ ALWAYS allowthe machine aproperamountof time tocool
beforeservicing.
■ Keepthemachineryinproperrunningcondition.
■ Fixdamageto themachineimmediately andalwaysreplace
brokenparts,ormissing decals.
■ Disposeofhazardouswasteproperly.Examplesofpotentially
hazardouswasteareusedmotoroil,fueland fuel filters.
■ DO NOT use food or plastic containers to dispose of
hazardouswaste.
■ DO NOT pour waste, oil or fuel directly onto the ground,
downadrainor into any water source.
Emergencies
■ ALWAYS know the location ofthenearest fire extinguisher
andfirst aid kit.
MC-42S CONCRETE MIXER — RULES FOR SAFE OPERATION
■ NEVER runenginewithoutaircleaner.Severeengine damage
may occur.
■ 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 roller.
■ 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.
■ NEVER leave the mixer unattended, turn off engine or electric
motor when unattended.
■ CAUTION mustalwaysbe observedwhileservicing thismixer.
Rotating parts can cause injury if contacted.
■ Unauthorized equipment modifications will void all
warranties.
■ Ensurethatanyextensioncableisprotectedagainstdamage
and not liable to be tripped over or trapped underneath the
mixer.
■ DONOT allowextensioncordtocomeintocontactwithwater
orfluids.
■ DO NOT spraywateronto electricmotor.
■ Thismixerisintendedforthe production of concrete. Mixer
mustbeusedonlyforitsintendedpurpose.
■ This mixer is not suitable for the mixing of flammable or
explosive substances.
■ NEVER operatethemixerinan explosive atmosphere.
■ Beforestartingthemixer,checkthatall guards areinposition
andcorrectlyfitted.
■ Keep area around the mixer clear of obstructions which
could cause persons to fall onto
moving parts .
■ ALWAYS ensure mixer is on level ground before mixing.
■ Become familiar with the controls of the mixer before
operating.
■ ALWAYS replace any worn or damaged warning decals.
■ Ensure the drum is rotating while filling and emptying the
drum.
■ ALWAYS disconnect AC power plug from power source
beforemovingmixer(electricmodel only).
■ High Temperatures – Always stop engine and allow the
engine to cool before adding fuel, oil or performing service
and maintenance functions. Contact with
hot components
cancauseseriousburns.
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 11
MC-42S CONCRETE MIXER — OPERATION AND SAFETY DECALS
Machine Safety Decals
TheMultiquipMC-42S mixerisequippedwitha number ofsafety decals(Figure1A).Thesedecals are providedforoperatorsafety
and maintenance information.The illustration below and on the next page shows these decals as they appear on the machine.
Shouldanyof these decals become unreadable,replacements can be obtained from yourdealer.
Figure 1A. MC-42S Mixer Decals
Go to Discount-Equipment.com to order your parts

PAGE 12 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — GENERAL INFORMATION
Application
This mixer is only intended for the production of concrete .
The mixer must be used for its intended purpose and is not
suitable for the mixing of
flammable or explosive
substances. The mixer must not be used in an explosive
atmosphere. Use Table 4 (Mixing Hints) as a guide when
mixing concrete for various applications.
Power Plants
TheMQWhiteman mixercanbe poweredbyeitheraHonda
GX120K1QX2 air-cooled, 4-stroke gasoline engine or a 1/2
HP electric motor. Refer to Table 1 to for specific engine or
electric motor data information.
Electrical
If mixer is equipped with an electric motor , make sure that
the power being supplied to the motor corresponds to the
voltage ratinglabelonthemotor.Supplyingthewrongvoltage
to the electric motor will cause severe electrical damage to
the motor.
Always make sure the OFF/ON switch on the electric motor
is in the OFF position before applying power.
It is strongly recommended when inserting the mixer's
power cord into a receptacle, that a G.F.C.I.( Ground Fault
Current Interrupter ) receptacle be used (115 VAC
applications).
Extension Cables
The extension cable should be a 3-wire configuration that
includes a ground wire that conforms to UL code.The wire
cross section must be a minimum of 2.5 mm2. Choose an
extension cord of adequate current carrying as Referenced
in Table 6. Remember distance affects the wire size of the
extension cable.
Ensure that the extension cable is carefully laid out avoid-
ing
wet areas , sharp edges and locations where vehicles
might run over it. Avoid allowing the extension cable to be
trappedunderneaththe mixer.
Unroll the extension cable fully or it will overheat and could
catch fire. Make sure that all extension cable connections
are dry and safe. Replace any defective or badly worn ex-
tension cable immediately.
Hardware
Check all hardware on the mixer before starting. Periodically
inspect all hardware. Loose hardware can contribute to early
componentfailureandpoorperformance. UseTable3asgeneral
guideline when the torqueing of mixer hardware is required.
Remembertokeepallmixer hardware components tight.
Engine Maintenance
Forbasicengine maintenance,refertotheenginemaintenance
sectionin thismanual.Foramoredetailedenginemaintenance,
refer to the
Honda Engine Owner's manual furnished with the
engine.
euqroTerawdraH.3elbaT noitadnemmoceR s
erawdraH retemaiD )sbl-tf(euqroT
81xhcni-61/541
61xhcni-8/342
42xhcni-8/373
31xhcni-2/193
31xhcni-2/1 )8edarG( 09
STNIHGNIXIM.4elbaT
SNOITACILPPA XIM SOITAR
SEITITNAUQHCTAB HCTAB.XORPPA TUPTUO
.sbl211TNEMEC ).sgK05( gaB DNASENOTS
.TF.UCRTL.TF.UCRTL.TF.UCRTL
yranidrOtsoM 4:2:1GAB2/14/1-1532/1-2173 58
s
noitadnuoF 6:3:1GAB3/14/1-1532/1-2174/3-287
ssaMhguoR etercnoC 8:4:1GAB4/14/1-1532/1-2174/3-287
,sroolFthgitretaW .ctE,stiP,sknaT 3:2/1-1:1GAB3/24/1-1533173 58
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 13
MC-42S CONCRETE MIXER — MIXER BASIC COMPONENTS
Figure 2. Mixer Major Components
1. Steel Mixing Drum — The Multiquip MC-42S uses a 4
cu.ft
steel mixingdrum.Thisdrum istobeusedformixing
of concrete. Always clean the drum after each use. DO
NOT usethismixing drum forthemixingofvolatile liquids.
2. Dump Latch —Torotate the mixing drum,this latch must
bein theupposition.Tolockthedrum,placethelatchin the
downposition.
3. Dump Gear Guard —NEVER operatethemixer with this
guard removed. Its purpose is to prevent dirt and debris
fromentering the dumpgear.In additionoperatorclothing
couldbecomeentangledinthe dumpgear,causingsevere
injury and bodily harm.
4. Handwheel — Turn this wheel clockwise or counter-
clockwisetorotate the mixingdrum.Rememberthedump
latch must be in the
up position in order for the mixing
drumtobe rotated.
5. Zerk Fittings —There is, at the bottom and engine side
of the yoke, and center of the
handwheel grease zerk
fittings. Lubricate these fittings as referenced in the
maintenancesectionofthis manual.
6. Safety Chain — This mixer uses a 3/16-inch thick, 72-
incheslongzinc-platedsafteychain.
ALWAYS connectthe
safetychainwhentowing.
7. Tow Bar — This mixer uses various towing bars, please
referencetheframe assemblydrawingand partslistinthis
manual to determine which tow bar meets your
requirements.
8. Leaf Suspension — This mixer uses a leaf type
suspension. Check the mounting hardware for bolt hole
elongationandtightness. See maintenancesectionofthis
manualforrecommendedmaintenance.
9. Chock Blocks — Place these blocks (not included as
part of the mixer package) under each mixer wheel to
prevent rolling, when mixer is not connect to the towing
vehicle.
10. Tires Ply —The tire ply(layers)numberisratedin letters;
This mixer uses 13-inch 2-ply tires. Replace with only
recommendedtypetires.
11. ON/OFFSwitch(gasoline only)—Thisswitchisprovided
on
mixerwithgasoline enginesonlyandislocatedonthe
side of the mixer frame. When activated it will shut down
theengine.Pulloutwhenstartingthe engine.
12. Cabinet/Latch — Encloses engine and electric motor.
NEVER run mixer with cabinet removed. Use latches to
secureenginecompartment cabinet.
13. MixingBlades(Steel) —Used forthemixingof concrete.
Whenblades showsignsofwear,entiresteelmixingdrum
assembly must be replaced. See steel mixing drum
assemblyinthepartssection of this manual.
Go to Discount-Equipment.com to order your parts

PAGE 14 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — BASIC ENGINE COMPONENTS
Figure 3. Engine Controls and Components
INITIALSERVICING
Theengine(Figure3)mustbecheckedforproperlubricationand
filledwithfuelpriortooperation. RefertothemanufacturersEngine
manualfor instructions&detailsofoperationandservicing.
1. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely.DO NOT over fill.
Addingfueltothetankshouldbeaccomplishedonly
when the engine is stopped and has had an
opportunitytocooldown. Intheeventofafuelspill,
DONOTattempttostarttheengineuntilthefuelresiduehasbeen
completelywipedup,and theareasurroundingtheengineisdry.
2. Throttle Lever – Used toadjustengineRPM speed(lever
advanced forward
SLOW , lever back toward operator
FAST ).
3. Engine ON/OFF Switch – ON position permits engine
starting,OFFpositionstopsengineoperations.
4. Recoil Starter (pull rope) – Manual-starting method. Pull
thestartergripuntilresistanceisfelt,thenpullbrisklyand
smoothly.
5. FuelValve Lever – OPEN to let fuel flow, CLOSE to stop
theflowoffuel.
6. Choke Lever – Used in the starting of a cold engine,orin
cold weather conditions. The choke enriches the fuel
mixture.
7. Air Cleaner – Prevents dirtandotherdebris from entering
the fuel system. Remove wing-nut on top of air filter
cannistertogainaccess to filter element.
8. Spark Plug – Provides spark to the ignition system. Set
sparkpluggapto0.6 - 0.7 mm (0.028 -0.031inch).Clean
sparkplugonceaweek.
9. Muffler – Used to reduce noise and emissions.
Enginecomponentscangenerateextremeheat.
To prevent burns, DO NOT touch these areas
whiletheengineisrunningorimmediatelyafteroperating.NEVER
operatetheenginewiththemufflerremoved.
10. Fuel Tank – Holds unleaded gasoline. For additional
informationrefertoengine owner's manual.
WARNING
WARNING NOTE
Operating the engine without an air filter,
witha damagedairfilter,or afilterinneedof
replacement will allow dirt to enter the
engine, causing rapid engine wear.
WARNING
Honda GX Series Engine Shown
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 15
MC-42S CONCRETE MIXER — HANDWHEEL ASSEMBLY
Assembly
The Multiquip MC-42S concrete mixer is shipped with the
handwheel detached. Attach the handwheel to the mixer as
shown in Figure 4.
Figure 4. Handwheel Assembly
Go to Discount-Equipment.com to order your parts

PAGE 16 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER —TOWING GUIDELINES
To reduce the possibility of an accident while transporting
the mixer on public roads, always make sure that the mixer
towing components and the towing vehicle are in good
operating condition and both units are mechanically sound.
Thefollowinglistofsuggestionsshouldbeused when towing
the mixer:
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION:
Towing Safety Precautions
■ Check with your county or state safety
towing regulations department before
towingyour
mixer .
■ Make sure that the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer "gross vehicle
weightrating"(GVWR).
■ ALWAYS inspect the hitch and coupling for wear. NEVER
towthemixerwith defective hitches, couplings,chainsetc.
■ CHECK thetireairpressureonboththetowing vehicle and
thetrailer.Also checkthetiretreadwearon both vehicles.
■ ALWAYS make sure the mixer is equipped with a "Safety
Chain".
■ ALWAYS attach trailer's safety chain to the frame of towing
vehicle.
■ ALWAYS make sure that the towing vehicle's directional,
backup, and brakelightsareworkingproperly.
■ Remember in most cases the maximum speed unless
otherwise posted for highway towing is 45 MPH, however
before towingyourmixer,checkyourlocalstate,andcounty
vehicletowingrequirements. Recommendedoff-roadtowing
isnot toexceed10 MPHor lessdependingontypeofterrain.
■ Place chockedblocks underneathwheels toprevent rolling,
whileparked,ifdisconnectedfromtowingvehicle.
■ Inflate tires to correct pressure, inspect tires for cuts, and
excessive wear.SeeTable 16 (TireWearTroubleshooting).
■ When towing of the mixer is required, place the drum in the
upposition(mouthfacing upwards).
■ ALWAYS make sure that the fuel valve lever is in the OFF
position(gasolinemodelsonly).
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION:
If the mixer tow bar is deformed or damaged
replace entire tow bar.NEVER tow the mixer
with a defective tow bar. There exist the
possibility of the trailer separating from the
towing vehicle.
Tow Bar to Vehicle Connection (Coupler Only)
1. Check the vehicle hitch ball, and mixer's coupler for
signs of wear or damage. Replace any parts that are
wornor damaged beforetowing.
2. Use only a 2-inch ball diameter (towing vehicle), this
will match the mixer's 2-inch coupler. Use of any other
balldiameterwillcreateanextremelydangerouscondition
which can result in separation of the coupler and ball or
ball failure.
3. After tow bar has been connected to mixer (see next
page), attach mixer's coupler to the hitch ball on the
towing vehicle securely and make sure the lock lever
is in the down position (locked).
Mixer Tow Bar Vehicle Connection (Pentile and Loop)
1. Makesurethebumperonthetowingvehicleis equipped
to handle either a pentile or loop type tow bar
configuration.
2. After tow bar has been connected to mixer (see next
page),secureeithertypeof tow bartothetowingvehicle,
following state and county towing regulations.
3. As a minimum, use a 1/2-inch bolt and nylock nut grade
5 when securing either tow bar to the towing vehicle,
■ Check wheel mounting lug nuts with a torque wrench.
Torque wheel lug nuts as described in the maintenance
sectionofthismanual.
■ Check tightness of U-clamp nuts, torque suspension
hardware as referenced in the maintenance section of this
manual.
■ Avoid sudden stops and starts.This can cause skidding, or
jackknifing. Smooth, gradual starts and stops will improve
gasmilage.
■ Avoidsharpturnstopreventrolling.
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 17
MC-42S CONCRETE MIXER — SAFETY CHAIN CONNECTION
NEVER ! towthemixerwiththe safety chain
removed. The safety chain is intended to
prevent completeseparationofthemixerfrom
the towing vehicle in the event of a tow bar
failure.
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION:
ReferenceFigure5fortheinstallationofthe Saftey Chain .
Tow Bar to Mixer Connection
1. Insert the tow bar through the round opening at the
bottom of the mixer stand.
Align the hole on the tow bar with the hole on the mixer
frame,andinsert1/2-inch boltthroughtowbarandframe.
Securetowbar to framewith1/2-inchnylock nut.Tighten
to 40 ft.-lbs.
2. Route the safety chain through the holes just above the
tow bar, located on each side of the mixer stand.
Loop the chain together and place under the tow bar.
Secure the loop with the connector link.
3. Extend the safety chain along the length of the tow bar,
looping it through the tow bar's connector link. Remove
any excess chain slack.
4. Connectthe free end of (connectorlink)the safety chain
to the towing vehicle. Remember it is critical that the
length of the chain be properly adjusted , to prevent
the draw bar and the front of the mixer stand from
dropping to the the ground (contact) in the event the
drawbarbecomesdisconnected fromthetowingvehicle.
Figure 5. Tow Bar and Safety Chain Installation
Go to Discount-Equipment.com to order your parts

PAGE 18 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — ELECTRIC MOTOR
Electric Motor
Formaintenancecareandoperationof the electricmotor,refer
toyourelectricmotorinstructionbookletfurnishedwiththeelectric
motor.
Protect the electric motor from dust as much as possible and
keepventilatingopeningsclean.
The electric motor used in this mixer is a single-phase 1/2 HP
motor. Theinputvoltage requirementfor this motor is115VAC.
Electric Motor Connection
A12-inchpowercable (Figure 6)witha3-prong grounding type
male plug is provided with the electrical motor for hookup to a
powersource.
ALWAYS , make certain that the power source required for the
electricmotoris
correct . Failure tosupplythecorrectvoltage
to the motor can severely damage the motor.Always read the
nameplate on the electric motor to determin the proper input
voltage.
The electric motor supplied with the mixer is configured from the
factory for 115VAC grounded operation.
ALWAYS, make certain
thatthecorrectsize,groundedextensioncord(3-wires)isused.See
Table 5.
Motors can burn out when the line voltage falls 10% below the
voltage rating of the motor. Length of the extension cord can
greatlyaffecttheoperatingvoltageof themotor.ReferenceTable
5for recommendedextensioncordsizewithrecpecttodistance.
Failure to operate electric motor at correct voltage will cause
motortooverheatand actuate the overloadswitch.
Ifoverloadprotectionshouldactuatebecauseofimpropervoltage
oranyothermalfunction, turnthemainswitchonthemotortothe
"OFF" position and correct the problem, press the reset switch
button,andturnthe main switchtothe"ON"position.
CAUTION:
■ DO NOT spray water at any time on the
electric motor .
■ DO NOT operate electric motor in a
explosiveenvironment.
NOTE NEVER!
disable or disconnect the
ON/OFF switch on the electricmotor.
Itisprovidedforoperatorsafety.Injury
mayresultifitisdisable,disconnected
orimproperlymaintained.
seziSdroCnoisnetxEdednemmoceR.5elbaT
cirtcelE rotoM tupnI egatloV .tf05 )m42.51( .tf57 )m68.22( .tf001 )m84.03( .tf002 )m69.06(
PH2/1CAV51121.oN01.oN8.oN6.oN
CAUTION:
ALWAYS makecertaintheelectricmotor'sON/
OFFswitchisworkingproperly.Whenthemixer
is not in use, place the ON/OFF switch in the
"OFF"position anddisconnectthepower cord
fromthepower source.
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 19
Figure 6. Single Phase Electric Motor with 12 inch Pigtail Cable
MC-42S CONCRETE MIXER — ELECTRIC MOTOR
Go to Discount-Equipment.com to order your parts

PAGE 20 — MC-42S CONCRETE MIXERS — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17)
MC-42S CONCRETE MIXER — PRE-INSPECTION (GAS ENGINE)
Figure 7. Engine Oil Dipstick (Removal)
3. Insert and remove the dipstick without screwing it into the
fillerneck.Check the oillevelshownon the dipstick.
4. If the engine oil level is low (Figure 8), fill to the edge of
theoilfillerholewiththerecommendedoiltype(Table6).
SeeTable 2 for the oil capacity of your type engine.
Figure 8. Engine Oil Dipstick (Oil Level)
Fuel Check
Ifyourmixer has agasolineengine,determineif the enginefuel
islow. Iffuelislow,removethefuelfillercapandfillwith
unleaded
gasoline.Motorfuelsarehighlyflammableandcanbedangerous
ifmishandled.DO NOTsmoke whilerefueling.DO NOT attempt
to refuel the trowel if the engine is
hot! or running .
1. Remove thegasolinecaplocatedon top offueltank.
2. Visuallyinspecttoseeiffuellevelislow.Iffuelislow,replenish
withunleadedfuel.
3. When refueling, be sure to use a strainer for filtration. DO
NOT top-offfuel.Wipeup any spilled fuel.
V-belt Check
AwornordamagedV-beltcanadverselyaffecttheperformance
ofthemixer.IfaV-belt is defective orwornsimply replace theV-
beltasoutlinedinthemaintenancesectionofthismanual.
Blade Check
Check for worn blades. If using a steel tub and the blades are
worn, replace the entire tub assembly. Remember the blades
areweldedtotub.
Ifusingaplastic tub, replacethebladesusingthe part numbers
referencedinthepartssection of this manual.
Start/Stop Switches
This mixer has been equipped with a start/stop switches for both
the gasoline and electric motor mixers.These switches should be
tested every time the engine or motor is started.
Grease Fittings (Zerk)
Check the zerk grease fittings (Figure 27) as shown in the
maintenancesectionofthismanual.Thesegreasefittingslubricate
the
handwheel and the yoke mechanism .
Explosive Fuel
Before Starting
1. Read safety instructions at thebeginningofmanual.
2. Clean the
mixer , removing dirt and dust, particularly the
engine cooling air inlet, carburetor and air cleaner.
3. Check theairfilterfor dirtanddust.Ifairfilterisdirty,replace
air filter with a new one as required.
4. Check carburetor for external dirt and dust. Clean with dry
compressedair.
5. Checkfasteningnutsandboltsfortightness.
Engine Oil Check
1. To check the engine oil level, place the mixer on
secure level ground with the engine stopped.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 7) and wipe it clean.
epyTliO.6elbaT
nosaeS erutarepmeT epyTliO
remmuS rehgiHroC°52 03-W01EAS
llaF/gnirpS C°01~C°52 02/03-W01EAS
retniW rewoLroC°0 01-W01EAS
Go to Discount-Equipment.com to order your parts

MC-42S CONCRETE MIXER — OPERATION AND PARTS MANUAL — REV. #9 (03/07/17) — PAGE 21
MC-42S CONCRETE MIXER — INITIAL START-UP (GAS ENGINE)
Starting the Engine (Gasoline Only)
Thefollowing stepsoutlinetheprocedureforstartingtheengine.
Depending on the type of engine employed in the mixer the
steps may vary slightly. If your mixer has an electric motor
disregardthissection.
1. Move the fuel shut-off lever (Figure 9) totheON position.
Figure 9. Fuel Shut-OFF Lever
2. Tostartacold engine,movethechokelever(Figure 10)to
theCLOSED position.
Figure 10. Choke Lever
3. Move the throttle lever (Figure 11) away from the slow
position,about1/3of the waytowardthefastposition.
Figure 11.Throttle Lever
4. Turn the engine switch (Figure 12) to the ON position.
Figure 12. Engine ON/OFF Switch
5. Located at the rear of the mixer frame is the main
start/
stop
button (Figure13).Pullthisbuttonoutwardtostartthe
engine.
Figure 13. Engine Start/Stop Button
Figure 14. Starter Grip
6. Pull the
starter grip (Figure 14) lightly until you feel
resistance,thenpullbriskly.The drumshould berotatingat
thistime.
Go to Discount-Equipment.com to order your parts