Yazoo YHR Series User manual

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, Sold 8 ServIced By:
SCHUURMANSFARMSUPPLY
.~M~~.~: l'!'~i1.:~g
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&05-589-5909
SchuurmansFarm Supply
41111 303rd Street
Avon. SD 57315
YAZOO YHR-SERIES
COMMERCIAL MOWER SAFETYSUMMARY
OWNER'S MANUAL..
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YHR-SERIES MODELS INCLUDE: EQUIPMENTDESCRIPTIONAND DATA
. YHR~3,
. YHRLW20 \""'--
. YHRLK2\
i 0 OPERATINGPROCEDURES
" . YHRK20
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J8"'" ' .YHRLK18
tI. YHRK18. ,- TanllAI CQ nnTIM~ DDt"\I"CnIIDco
LTROUBlESHOOTING PROCEDU
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IllUSTRATED PARTSLIST
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Rev.Nov.20,1990 LITERATURE NUMBER 1301-098

SAFETYSUMMARY
i
t.OVERVIEW
I.
IThis manualcontains technical data on the following YAZOO YHR-SERIES 3-
wheel hydrostatic-drive mowers:
YHRLK23 YHRLK20 YHRLW20 .II
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YHRK20 YHRLK18 YHRK18 !
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Unlessspecificallydesignated otherwise, these units will be referred to as a
I mowers. These mowers are A.N.S.I. 871.4 1984approved. This chapter is
r designed to assistyou, the owner/operator, to become sufficientlyequipped to
Itsafely perform the following tasks as outlined inthis manualfor your particular'
, mower:
t . assembly
I . adjustments
"
.\ . safe operation
I! . basic operator maintenance,i.e., inspections, lubrications, servicing,
: . troubleshooting and simple remove and replace functions that do not require
1 specialtools,skillsorfacilities
.to correctly order partsto effect preventivemaintenance and/or repair when
necessary.
As the owner/operator, you should become closely associated with this manual.
Pleaseread and re-readthis SAFETYSUMMARY and always be aware of the
DANGER,WARNING, CAUTION, and NOTE signals placed in this manual.
\.. DANGER -indicates an IMMINENTLY HAZARDOUS
h situation which, if not avoided, WILL RESULT in
.. death or serious injury
WARNING -indicates a POTENTIALLY hazardous
h situation which, if not avoided, COULD RESULT
.. in death or serious injury
.1 YAZOO YHR-SERIES MOWERS
OWNER'S MANUAL
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SAFETY SUMMARY
CAUTION- indicates a potentially hazardoussituation .f
h which, if not avoided, MAY RESULTin minor or
.. moderateinjury
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: NOTE- relevant information to assist you in the perfor- f
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GENERALSAFETYPRECAUTIONS t
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Thefollowinggeneralsafetyprecautionsshouldbefollowedwheneverthecut- J
tingdecki,s,beingused.Ac~nstantstateof aw,areness',concern,pr~denceand L
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propertrainingshouldprevailoverallpersonsInvolvedIntheoperation, i
transport,maintenance,andstorageofthemower.Good judgementandcom-
monsenseshouldalwaysprevail.Takeeffortsto preventthepossibilityof un- ~
authorizedorunknownuse,oravailabilityofthismowertoanyoneoutsideyour ~
directsupervision.Alwaysremoveandstorekeywhenmowerisnotinuse. j
1 READANDTHOROUGHLYUNDERSTANDTHISMANUAL,andalldecalson t
unit,BEFOREattemptingtooperate ~
2 NEVERallowchildrento operatethemower.NEVERallowanyadultto operate .1 1' f
themowerwithoutproperinstruction.REMOVEKEYwhennotinuse. j
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t .1
! 3 NEVERattempttocarrychildrenoranyotherpassengers,Themowerwas ~
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f designedto carryONEOPERATORALONE.
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'. 4 NEVERmowwhenchildrenand/orbystandersarepresent.
SALWAYSWEARSUITABLECLOTHINGwhenoperatingmower,i.e.,proper
, boots,gloves,safetygogglesforeyeprotection,andearmuffsorearplugsto
'r protectagainstuncomfortableorobjectionablenoise.DONOTWEARLOOSE-
FITTINGAPPARELthatcouldgetcaughtinthemovingpartsof mower.
, 6 DONOTattempttooperatemowerifyouarenotsittinginoperator'sseat.
1, ALWAYSgetintooperator'sseatfromleftside(sittinginseatlookingforward)in !
... orderto avoidinadvertentcontactwithvariablespeeddirectionalcontrolpedal. I
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YAZOO YHR-SERIESMOWERS 2
OWNER'S MANUAL
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SAFETYSUMMARY
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.7 ALWAYS BE ALERT when operating mower. DO NOT let outside interests dis-
tract you.
8 ALWAYS CLEAR AREA to be mowed of any foreign objects (stones, wire, cans,
bottles, etc. that could be picked up and thrown by mower.
9 ALWAYS DISENGAGE ALL attachment levers BEFORE ATTEMPTING to start
mower.
10 ALWAYS DISENGAGE POWERTAKE-OFF (PTO) attachments, RETURN ALL
leversto NEUTRAL POSITION, STOP engine and REMOVE key PRIORto leaving
operator's seat FORANY reason. fj'
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11 ALWAYS DISENGAGE power, STOP engine, and REMOVE spark plug wire, ~
Jbefore attempting any inspection, adjustment,cleaning, or repair. ~
i12 When not mowing, DO NOT drive (transport)the mower with cutting deck
blades engaged.
:
13 USE CARE when mowing around fixed objects. NEVERdeliberately run over
foreign objects as damage to mower and/or injuryto others may result.
. 14 NEVER MOW on a surface angle greater than 15 degrees. ALWAYS MOW
ACROSSthefaceonslopesof15degreesorless-NEVERUPANDDOWN.DO
NOTATTEMPT sudden starts or stops when mowing on a slope. AVOID SUDDEN
TURNS and use EXTREME CAUTION when changing directions on any slope. =~
15 IF MOWER STOPS while going uphill, DISENGAGE BLADE and BACK
MOWER SLOWLY down hill.
16 Use CARE when operating near, or crossing roadways.
17 DISENGAGEcutting deck bladeswhen backing up. DO NOT MOW IN
REVERSEas a practice. IF ABSOLUTELY NECESSARYto mow in reverse,
ALWAYS OBSERVEAREA UNDERAND BEHIND YOU before mowing.
18 Mower and attachments SHOULD BE STOPPED AND INSPECTED AFTER
STRIKING ANY FOREIGN OBJECT. ANY DAMAGE should be repaired before
using mower again.
. 3 YAZOO YHR-SERIES MOWERS
OWNER'S MANUAL

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SAFETY SUMMARY
19 DONOTaltergovernorsettingonengine.Engineoverspeedcouldresultin ..
severedamageand/orinjury. . .
20 DO NOT OPERATE mower without a mufflerinstalled.
21 KEEPALL SHIELDS AND SAFETY DEVICES INTACT. NEVERtry to circum- f
vent or disablethese features. r22 NEVERmow at NIGHT, in LOW-LIGHT conditions, in RAIN or when GRASS IS \ ~~
WET. .
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23 In order TO PREVENT BREATHING of concentrated CARBON MONOXIDE I.
and other NOXIOUS FUMES, DO NOT operate engine in confined air space. \
\'" 24 ALWAYSallowtheengineto cooldownBEFOREATTEMPTINGto store (
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mower in any enclosed structure such as a garage or shed. :
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i 25ALWAYS keep mower cleanto prevent accumulation of grease, grass, leaves I
and dirt. This will reducethe chance of fire due to heat build-up. \
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26 KEEPALL NUTS, BOLTS AND SCREWSTIGHT. Keepyour cutting section in ..~ ~ .i good working condition by performing preventivemaintenanceas outlined in this !
\ manual. J
27 NEVERadd fuelto a running engine. ALWAYS WAIT at leastfive (5) minutes ;
before refuelingand REFUELWITH THE ENGINE OFF. KEEP FUELAWAY I
FROMSPARKSORFLAMES.WIPEAWAYanyfuelspillageBEFOREstarting 1
unit. !
28 ALWAYSSAFELYRELIEVEPRESSUREinhydraulicsystemorfuelsystem .1-Co" PRIORTO ANY ATTEMPT TO DISCONNECT LINES OR TO PERFORM WORK tON SYSTEMS.
l 29 ALWAYS KEEP BODY AND HANDS AWAY from pin holes, fittings, or nozzles i: ",,:~
that ejectfluid under high pressure. ALWAYS use cardboard or a piece of paper - I "c~
NEVER YOUR HANDS OR BODY PARTS - to search for leaks. Fluid escaping !
\ under high pressure CAN HAVE SUFFICIENT FORCETO PENETRATE SKIN 1
AND DO SERIOUS DAMAGE. IF THIS FLUID IS INJECTED INTO THE SKIN, IT lMUST BE SURGICALLY REMOVEDWITHIN A FEWHOURS BYA PHYSICIAN !'~
FAMILIAR WITH THIS FORM OF INJURY OR GANGRENE MAY RESULT. "
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YAZOOYHR-SERIES MOWERS 4 I
OWNER'S MANUAL
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.i EQUIPMENT DESCRIPTION AND DATA
a 8 DESCRIPTION OF MAJOR COMPONENTS.
This table has been divided into three (3) columns. The first column, "KEY", is
the key reference number on the associated illustration to aid in identification.
i The second column, "MAJOR COMPONENT", is the name, and the third
~ column, "FUNCTION", is a brieffunctional description of that major component. ;;,l~;
i KEY MAJOR COMPONENT FUNCTION
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1 Tractor Provides mount and operating power for
cutting deck
. . 2 Cutting deck Performsmowing function.
I3 Hood Provides enclosure for engine and drive
train components.
4 Hydrostatic Transmits motive force to transmission
transmission transaxle to propel tractor.
5 Transaxle Converts transmission energy to drive
I
i i wheels.
t ) . 6 CIS gearbox Transmits power from engine to deck :"";
j blades.
I 7 23 HP Kohler, .
20 HP Wisconsin,
! 20 HP Kohler, or ~
\ 18 HP Kohler Provides power to SUNDSTRAND/YAZOO ~
power pack and provides power for ~
I hydrostatic transmission and PTO shaft. , c-
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8 Fuel tank Storage for on-board fuel.
9 Hydraulic reservoir Storage for system lubricating/hydraulic
. fluid.
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OWNER'S MANUAL
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EQUIPMENT DESCRIPTIONAND DATA
10 Transmissionfan Keepshydrostatic transmission within
specified operating temperature range. . ~
11 Tow valve button Allows unitto to be moved by de-clutching
hydrostatic transmission. Button is
disengaged when engine is started. (, 1
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EQUIPMENT DATA. ) ,
Includesdatafor the following YAZOO models: (
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YHRLK23 YHRLK20 i".
YHRLW20 YHRK20 )
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YHRLK18 YHRK18 "X, ,.
Theseabove-listedmodels may be combined with any of availablePSR-Series ; J
48/60/76-inch 3-blade cutting decks. #.
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ENGINE (as related by model) - j ,
. YHRLK23 - Kohler23 HP .i 4
. YHRLW20 - Wisconsin 20 HP I.,
.,.
. YHRLK20, YHRK20 - 20 HP Kohler ,,1
. YHRLK18, YHRK18 - Kohler 18 HP i
STEERING- f i
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. Rearwheel t 31'
TIRES - 1 '
f. I
. Front- 18X 9.5 pneumatic r '
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. Rear- 16X 6.5 pneumatic t
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VAZOO VHR-SERIES MOWERS 6 .'
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)EQUIPMENT DESCRIPTION AND DATA
, HYDRAULIC SYSTEM -
I . . SUNDSTRANDBDU-21hydrostatictransmissioncoupledto aYAlOO trans- 1
axle axle using SAE30 weight oil API service SG,SF/CC,CD ~'
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, ) AIR CLEANER - ,~
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~ . Dualelement replaceablefilter
, HYDRAULIC SYSTEM OIL FILTER - :~
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I. Spin-on disposable cartridge 1
ELECTRICAL SYSTEM - I
, . 12Volt, negativeground with starter,battery,and 15amp !
r alternator.
~ CUTTING SECTION -
l . 48/60/76-incheswidewiththreeblades.Manually-controlledandadjustable
.I from11/2-3 inches.PoweredfromPTOgearboxontractorto cuttingdeck.
Deadheadpulley powers beltsto each blade.
J . DRIVING SPEED - (Infinitely variable)
i
J . FORWARD,between0 - 9.5 mph
t . REVERSE,between0 - 4.5 mph
I DRYWEIGHTS (Approximately)-
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I . Tractors 750 Ibs. (340.2kg)
1 . 48-inch cutting section - 360 Ibs. (163.3kg)
I . 60-inch cutting section - 400 Ibs. (181.4kg)
. 76-inch cutting section - 470 Ibs. (213.1kg).
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I . 7 YAZOOYHR-SERIES MOWERS
OWNER'S MANUAL

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EQUIPMENT DESCRIPTION AND DATA
FLUID CAPACITIES - US gallons (liters)
. Fueltank 4.6 (17.4) Ii)
. Lubricating oil, engine (by model number)
YHRLK23 US pints (liters) 8.0 (3.8)
YHRLW20 US pints (liters) 7 (3.4)
YHRLK20, YHRK20 US pints (liters) 3.5 (1.7)
YHRLK18, YHRK18 US pints (liters) 3.5 (1.7)
f . Lubricating oil,SAE30 weight oil API service SG,SF/CC,CDfor
~ transaxle/hydraulic system
" US quarts (liters) 6.0(5.7).
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YAZOO YHR-SERIES MOWERS 8
OWNER'S MANUAL
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i j OPERATING PROCEDURES
t !.DESCRIPTION AND USE OF OPERATORS,
i CONTROLS AND INDICATORS.
I.
.1 This table has been divided into three (3) columns. The first column "KEY", is the
"
Ikey reference number on the associated illustration to aid in identification. Thesecond column, "CONTROL OR INDICATOR" is the name and the third column,
"FUNCTION", is a brief functional description of that control or indicator.
!
i J KEY CONTROL/INDICATOR FUNCTION
I! 1 1 3-Position Key Switch Switches current to ignition
! r system as follows:
t STOP -opencircuit,
f electrical system off.
1. RUN -currentto
if; electrical system. Ii START -ismomentary
1. contact switch to engage
r
t ;\'~i .starter motor
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1 2 Ammeter Indicates the rate of charge of alternator.
, 3 Hour Meter Measures and indicates the accumulative
,} timethatenginehasrun.
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; , 4 Throttle Control Manual engine speed
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I f control.
I i Full rear position is open
Full forward is closed position.
S Inclinometer Shows mower angle of incline
6 Manual Choke Allows easier start-up of cold engine when
the CHOKE is engaged.
7 Blade Control lever Engage/Disengage cutting deck blades.
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OPERATING PROCEDURES
8 VariableSpeedDirect- PermitsFORWARDor REVERSEdirection
ional Control Pedal with variablespeeds in either mode. t)(! t
Neutralcenter position provides braking'
action.
9 SteeringWheel Automotive-type steering.
10 Cutting Deck Control ProvidesUPor DOWN
Lever positioning of cutting deck.
11 Parking Brake Manuallylocks the service
brake when activated.
12 SeatSafetySwitch A passive,series control to ensure
that ENGINE CANNOT BE STARTED
AND MOWER CONTINUE TO RUN IF:
*operator is not seated in driver's seat
*cutting section blade control lever is
engaged
* transmission is in gear.
13 Cutting Section A passive, series control to ensure
SafetySwitch thatENGINECANNOTBESTARTED ",; .
AND MOWER CONTINUE TO RUN IF: ~J!. .
*cutting section blade control lever is
engaged
* transmission is in gear
* operator is not seated Indriver's seat.
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ASSEMBLY. ?i;".~_;
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Your YHR-SERIES mower comes as three separate items: Jc "I
. Cutting section (deck) l.
I,
. Tractor ,
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. Installationkit (matchedto cutting section) L
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VAZOOVHR-SERIES MOWERS 10 t,),-
OWNER'S MANUAL

I OPERATING PROCEDURES
t.This section is designed to aid you in the assembly of these three major com-
J ponents.Assemblyissimpleandisaccomplishedasfollows: ,"0;
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NOTE -ENGINE HAS NOT BEEN SERVICED PRIOR TO r.
DELIVERY. CONSULT ENGINE MANUAL TO SERVICE ~l'ENGINE PRIOR TO USE. cJ~
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'1" The o~ly ass~mbly o~ your.YHR-SERIES,m°v:'erist~e in~tallationof one of the '«
, following cutting sections with corresponding Installationkit: ;]1
;~ . PSR-48 KIT (EITHER PIN 1105-059OR PIN 1105-061) ti
,~ ');j
. PSR-60 KIT (EITHER PIN 1105-058 OR PIN 1105-060) :~
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. PSR-76 KIT (EITHER PIN 1105-062 OR PIN 1105-085) :,J
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\i, 1 Position cutting section (1) in front of mower (2).
, 2 Insert rod ends (3)with jam nuts (4) into lift arms (5 and 6). Tighten jam nuts
f (4).
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)~~ . 3 I.nstallcutting section liftarms (5 and 6) into brackets on rear of cutting section
Iusing bolts (7), star lockwashers (8), and nuts (9).
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OPERATING PROCEDURES
NOTE - Looking at tractor from cutting section, lift arm ~'\ .on right side of cutting section will go against wheel -)!J
side of tractor mounting bracket. Left lift arm will go
against inside of tractor mounting bracket.
4 Secureeach rod end (3)with each liftarm (5and 6) to tractor mounting brack-
ets (10 and 11)with bolt (12),washer (13),and nut (14).
GP5 ('jj) ~
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NOTE-Do not force halves of PTO shaft together.
Forcing themtogether indicates that they are not
properly aligned and will cause severedamage
to unit. Whensplines arealigned correctly, halves
will slide together easily.
5 Alignmarkson pro shaft(15)and join halves ofpro shaft(15) together.
6 Securecutting section halfof PTOshaft (15)to mower with roll pin (16) and
setscrew (17).
YAZOO YHR':SERIES MOWERS 12 (}) ~
OWNER'S MANUAL
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( OPERATING PROCEDURES ,
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i.NOTE-If you have a hyd~aulic lift model, go to STEP )1;'
: 7. IfYOUhave a manual 11ftmodel, go to STEP 1O. ,~
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f 7 Installspringextenders(1)withbolts(2)andnuts(3)to cuttingsectionlift
f bracket(4).Installsprings(5).
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:A:1: .8 Installhydrauliccylinder(1)asfollows:
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't;!!,II .Securecuttingsectionliftbracket(2)to cuttingsection(3)withtwo bolts(4),
lockwashers(5),andnuts(6).
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~ 13 YAZOO YHR-SERIES MOWERS
f OWNER'S MANUAL

OPERATING PROCEDURES
. Securetwobrackets(7)tocuttingsectionliftbracket(2)withclevispin(8) .~ .
and hairpin clip (9). ~ .
. Secure liftcylinder rod end (10)to cutting section lift bracket (2)with clevis
pin (11) , hairpin clip (12)and spacer (13).
9 Tighten nut (1) on idlertension rod to adjust tension of drive belt. Go to STEP
13.
Iii 10 Installdeck lift cable (1) around cable roller (2) and tighten cable (1) so that tJ}l..t
ii:j. thereisnoslackwhencuttingsectionislowered.
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VAZOO VHR-SERIES MOWERS 14
OWNER'S MANUAL
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I OPERATING PROCEDURES ~
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: ,:; ! e b1.Installsprings(1)tospringextenders(2)andtocuttingsectionliftbracket
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12 Tightennut(1)onidlertensionrodto adjusttensionofdrivebelt.
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15 YAZOO YHR-SERIES MOWERS
OWNER'S MANUAL
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II' OPERATING PROCEDURES
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'f 13 Connect spark plug wire (1)with rubber boot~to spark plug (3). ~)c
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(l)
I CUTTING SECTION HEIGHT ADJUSTMENT.
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j,IThis section is designed to explainthe procedure to adjust the cutting height of
:~!I the cutting deck. THIS IS ONLY TO BE DONEWHILE THE ENGINE IS OFF.
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i; !, 1 Disassembleparts (1) through (13)on front caster wheels (14).
~ ~:ij 2 Disassembleparts (15)through (25)on rear carriage wheels (26).
!~ 11
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YAZOOYHR-SERIES MOWERS 16 ..
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OPERATING PROCEDURES ~~J
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8NOTE- LOWERINGor RAISING cutting section RE- f!~1
QUIRES that REAR HEIGHT BE 1/8" HIGHER THAN ~c~
FRONTat any setting chosen to ensure proper cut. .!
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3 Adding/deletingspacers(4)through(6)atthefrontcasterwheels(14),or (15) I
through(20)attherearcarriagewheels(26)willchangeheight.
4 Re-assembleparts(1)through(13)andadjustbothfrontcasterwheels(14)to
desiredheightusingnecessarycombinationofspacers(4),(5)and(6).Measure
heightandrecordfor reference.
S Re-assembleparts(15)through(25)andadjustbothrearcarriagewheels(26)
to therecordedheightoffrontcasterwheels(14)PLUS1/8"usingthe necessary
combinationof spacers(15)through(20).
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~ 17 YAZOO YHR-SERIES MOWERS
OWNER'S MANUAL ~

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OPERATING PROCEDURES
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I. - PREVENTIVEMAINTENANCE. t\\~'f
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i Preventive maintenance (PM) tasks are scheduled owner-maintenance items ;,
~
1 used to ensure that your YHR-SERIES mower is ready to operate at all times.
i! . Careful inspection and servicing of the mower will aid in locating possible
: defects, correcting defects or preventing them. Perform these items as outlined
here to ensure the highest level of reliability and safety. OBSERVE THESE, AND
ALL OTHER DANGER, WARNING, AND CAUTION SIGNALS IN SAFETY
SUMMARY IN THE FRONT OF THIS MANUAL WHEN PERFORMING THESE
TASKS:
~~Ir... DANGER -NEVER PLACE HANDS OR FEET AROUND
.. OR UNDER CUTTING SECTION WHEN ENGINE IS
i RUNNING.
it. WARNING -THE FOLLOWING PM TASKS ARE TO BE
I. COMPLETED WITH THE ENGINE OFF UNLESS
I: OTHERWISE DIRECTED. EACH OF THE TASKS
. ,i: ! SHOULD BE PERFORMED IN SEQUENCE.
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"rlilll,W.ARNING -BEFORE YOU OPERATE MOWER: keep in
! .IIill h mind all DANGER, WARNING AND CAUTION signals
;~fII.\! .. to e~sure your safety and the proper care of your
IiI f1 equipment.
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j ii! it WARNING - WHILE YOU OPERATE MOWER - keep in
II [Ii \.~ h mind all DANGER, WARNING AND CAUTION signals
\.[1 r~ .. to e~sure your safety and the proper care of your
J III I! equipment.
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j 11: \i: CAUTION -WHENEVER NECESSARY -perform routine
1, Iii I: r... checks not covered specifically in PM such as clean-
Iii,,; t' .. ~ng,tighte.ning loose nuts and bolts and storing loose
1:*1 Items not In use.
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YAZOO YHR-SERIES MOWERS 18
OWNER'S MANUAL
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OPERATING PROCEDURES
c' '8NOTE -IF YOUR MOWER FAILS TO OPERATE -see
t)}:j. the TROUBLESHOOTING chapter of this manual to
determine the possible cause and any corrective
action. If the problem is not listed or is still not
resolved, see your YAZOO dealer immediately.
PERFORMBEFOREANDAFTEREACHUSE.
1 Checkengineaircoolingfins(1);ifdirty,clean.
i
..., 'TYPICAL I
PERFORM BEFORE EACH USE.
2 Check V-belts (1,2and 3) for cracks, cuts, peeling or abrasions.
,
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tl,. 19 YAZOO YHR-SERIES MOWERS
, OWNER'S MANUAL
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