Since MR V1.2, you can add the "losses" feature to your combine harvester (you should not add this to a forage harvester, since this could not be realistic) :

First you need to activate the feature
Code:
<realCombineLosses allowed="true" />

Then, you should specifiy the "maxSqmBeingThreshedBeforeLosses" parameter.
This is the max "material quantity per time unit" that the combine threshing system can handle before starting having losses. Try to put a value close to what is set for the "default" combine converted and then adjust as you like.
Example :
Code:
<realCombineLosses allowed="true" maxSqmBeingThreshedBeforeLosses="90"

If you want to display the losses on the "hud" (on the screen in game while driving the combine), just add the "displayLosses" parameter and set it to "true".
Example :
Code:
<realCombineLosses allowed="true" displayLosses="true" />

Finally, there is also a "lossesFx" parameter to set the "increasing curve" for the losses. The higher the value, the faster the losses increase. (default value = 0.5)
Example :
Code:
<realCombineLosses allowed="true" lossesFx="0.3" />

The former "realThreshingScale" remains valid and now represents the minimum losses for this combine.

<?xml version="1.0" encoding="utf-8" standalone="no" ?>
<modDesc descVersion="9">
<author>Edit 2013: Silak_68, werik</author>
<title>
<en>Т 150К</en>
<ru>Т 150К</ru>
</title>
<description>
<en>
<![CDATA[Т 150К]]>
</en>
<ru>
<![CDATA[Т 150К]]>
</ru>
</description>
<multiplayer supported="true" />
<iconFilename>store.dds</iconFilename>
<version>1</version>
<l10n>
<text name="INTERACTIVE_CONTROL_SWITCH">
<en>Switch IC State</en>
<ru>Мышь вкл/выкл</ru>
</text>
<text name="InteractiveControl_Off">
<en>Disable IC</en>
<ru>Отключить управление мышью</ru>
</text>
<text name="InteractiveControl_On">
<en>Enable IC</en>
<ru>Включить управление мышью</ru>
</text>
<text name="ic_component_close">
<en>Left Mouse Button: close %s</en>
<ru>Лев.кн.мыши: закрыть %s</ru>
</text>
<text name="ic_component_open">
<en>Left Mouse Button: open %s</en>
<ru>Лев.кн.мыши: открыть %s</ru>
</text>
<text name="ic_button_on">
<en>Left Mouse Button: activate %s</en>
<ru>Лев.кн.мыши: включить %s</ru>
</text>
<text name="ic_button_off">
<en>Left Mouse Button: deactivate %s</en>
<ru>Лев.кн.мыши: выключить %s</ru>
</text>
<text name="leftDoor">
<en>Left door</en>
<ru>левую дверь</ru>
</text>
<text name="rightDoor">
<en>Right door</en>
<ru>правую дверь</ru>
</text>
<text name="leftWindow">
<en>Left window</en>
<ru>левое окно</ru>
</text>
<text name="rightWindow">
<en>Right window</en>
<ru>правое окно</ru>
</text>
<text name="Motor">
<en>Start the engine</en>
<ru>Клав. Num Enter: Двигатель пуск/стоп</ru>
</text>
<text name="Info_ON">
<en>Info ON</en>
<ru>Num 0: Показать информацию</ru>
</text>
<text name="Info_OFF">
<en>Info OFF</en>
<ru>Num 0: Скрыть информацию</ru>
</text>
<text name="Info_avto">
<en>- Т 150К -</en>
<ru>- Т 150К -</ru>
</text>
<text name="Lev_povorot">
<en>Key Num 1: Lev povorot</en>
<ru>Клав. Num 1: Левый поворот</ru>
</text>
<text name="Avarijka">
<en>Key Num 2: Avarijka</en>
<ru>Клав. Num 2: Аварийка</ru>
</text>
<text name="Prav_povorot">
<en>Key Num 3: Prav povorot</en>
<ru>Клав. Num 3: Правый поворот</ru>
</text>
<text name="Kapot">
<en>Key K: Kapot</en>
<ru>Клав. K: Боковины капота</ru>
</text>
<text name="Mirrors">
<en>Key Z: Rehotka</en>
<ru>Клав. Z: Решотка</ru>
</text>
</l10n>

<extraSourceFiles>
<sourceFile filename="TwinWheelsEvent.lua" />
</extraSourceFiles>

<specializations>
<specialization name="T150K" className="T150K" filename="T150K.lua" />
<specialization name="rpmLimiter" className="rpmLimiter" filename="rpmLimiter.lua" />
<specialization name="dynamicExhaustingSystem" className="DynamicExhaustingSystem" filename="DynamicExhaustingSystem.lua" />
<specialization name="interactiveControl" className="InteractiveControl" filename="InteractiveControl.lua" />
<specialization name="InteractiveDoors" className="InteractiveDoors" filename="InteractiveDoors.lua" />
<specialization name="InteractiveWindows" className="InteractiveWindows" filename="InteractiveWindows.lua" />
<specialization name="controlPanelAttacher" className="ControlPanelAttacher" filename="ControlPanelAttacher.lua" />
<specialization name="additionalLights" className="BEL3" filename="beleuchtungV31.lua"/>
<specialization name="TwinWheels" className="TwinWheels" filename="TwinWheels.lua" />
<specialization name="T150" className="T150" filename="T150.lua"/>
</specializations>
<vehicleTypes>
<type name="T150K" className="Vehicle" filename="$dataS/scripts/vehicles/Vehicle.lua">
<specialization name="realisticVehicle" />
<specialization name="motorized" />
<specialization name="steerable" />
<specialization name="hirable" />
<specialization name="aiTractor" />
<specialization name="bunkerSiloCompacter" />
<specialization name="honk" />
<specialization name="animatedVehicle" />
<specialization name="cylindered" />
<specialization name="articulatedAxis" />
<specialization name="T150K" />
<specialization name="rpmLimiter" />
<specialization name="dynamicExhaustingSystem" />
<specialization name="interactiveControl" />
<specialization name="InteractiveDoors" />
<specialization name="InteractiveWindows" />
<specialization name="controlPanelAttacher" />
<specialization name="additionalLights" />
<specialization name="TwinWheels" />
<specialization name="T150" />
<specialization name="realisticMotorized" />
<specialization name="realisticSteerable" />
</type>
</vehicleTypes>
<storeItems>
<storeItem>
<en>
<name>MR T150K</name>
<description>
<![CDATA[Modell,Textur: T150, alexey 1998
Edit 2013: Silak_68
Total edit: McPj_gandras MECHANIK karollic Justinas mtz_2l]]>
</description>
<specs><![CDATA[Max.power: 121.4 kW / 165 hp
Service: %s/day]]></specs>
</en>
<ru>
<name>MR T150K</name>
<description>
<![CDATA[Modell,Textur: T150, alexey 1998
Edit 2013: Silak_68
Total edit: McPj_gandras MECHANIK karollic Justinas mtz_2l]]>
</description>
<specs><![CDATA[Макс. мощность: 121.4 кВт / 165 л.с.
Обслуживание: %s/день]]></specs>
</ru>
<rotation>0</rotation>
<image active="store.dds" brand="Textures/logo.png"/>
<price>70000</price>
<xmlFilename>T150K.xml</xmlFilename>
<dailyUpkeep>18</dailyUpkeep>
<machineType>tractors</machineType>
<brand>ХТЗ</brand>
</storeItem>
</storeItems>
<inputBindings>
<input name="INTERACTIVE_CONTROL_SWITCH" category="VEHICLE" key1="KEY_space" key2="" button="" device="0" mouse="" />
<input name="BEL3LEFT" key1="KEY_KP_1" button="" />
<input name="BEL3WARN" key1="KEY_KP_2" button="" />
<input name="BEL3RIGHT" key1="KEY_KP_3" button="" />
<input name="Kapot1" key1="KEY_k" button="" />
<input name="HTWINS" category="VEHICLE" key1="KEY_8" key2="" button="" device="0" mouse="" />
</inputBindings>
</modDesc>

<?xml version="1.0" encoding="utf-8" standalone="no" ?>
<vehicle type="moreRealistic.tractor_articulatedAxis">
<annotation>Copyright © GIANTS Software GmbH, All Rights Reserved.</annotation>
<name>
<en>T 150K</en>
<ru>T 150K</ru>
</name>
<filename>T150K.i3d</filename>

<size width="3.5" length="7"/>

<wheels autoRotateBackSpeed="1">
<wheel rotSpeed="0" driveMode="1" repr="0>0" radius="0.7" deltaY="-0.02" suspTravel="0.1" spring="60" damper="30" mass="0.2" brakeRatio="1" />
<wheel rotSpeed="0" driveMode="1" repr="0>1" radius="0.7" deltaY="-0.02" suspTravel="0.1" spring="60" damper="30" mass="0.2" brakeRatio="1" />
<wheel rotSpeed="0" driveMode="2" repr="1>0" radius="0.7" deltaY="-0.02" suspTravel="0.1" spring="60" damper="30" mass="0.2" brakeRatio="1" />
<wheel rotSpeed="0" driveMode="2" repr="1>1" radius="0.7" deltaY="-0.02" suspTravel="0.1" spring="60" damper="30" mass="0.2" brakeRatio="1" />
</wheels>

<accelerationSpeed maxAcceleration="1" deceleration="1" brakeSpeed="3" />
<fuelCapacity>435</fuelCapacity>
<fuelUsage>0</fuelUsage>
<downForce>0</downForce>
<bunkerSiloCompacter compactingScale="2"/>

<waitForTurnTime>1600</waitForTurnTime>

<realMaxVehicleSpeed>59</realMaxVehicleSpeed>
<realBrakeMaxMovingMass>18</realBrakeMaxMovingMass>
<realBrakingDeceleration>6</realBrakingDeceleration> <!-- deceleration in m/s2. 2 = very bad. 3 = bad. 4 = average. 5 = good. 6/7 = trucks, cars braking system -->

<realSCX>5.5</realSCX>
<realPtoPowerKW>165</realPtoPowerKW> <!-- ECE R-120 max power 175 KW (194 with boost) -->
<realMaxFuelUsage>43</realMaxFuelUsage>

<realSpeedBoost minSpeed="20">25</realSpeedBoost> <!-- boost in KW, active at which speed ? (km/h) -->
<realImplementNeedsBoost minPowerCons="18">25</realImplementNeedsBoost> <!-- boost in KW, active at which power (KW) consumption from implements ? => example : pto tools, hydraulics... -->
<realMaxBoost>30</realMaxBoost> <!-- max boost in KW possible => when speed and pto boost are active together for example -->

<realDisplaySlip>true</realDisplaySlip>

<cameras count="2">
<camera1 index="1>2|0" rotatable="true" rotateNode="1>2" limit="true" useWorldXZRotation="true" rotMinX="-1.4" rotMaxX="0.1" transMin="5.8" transMax="35" >
<raycastNode index="0>7|0"/>
<raycastNode index="0>7|1"/>
<raycastNode index="0>7|2"/>
<raycastNode index="1>14"/>
</camera1>
<camera2 index="0>2|9" rotatable="true" limit="true" useWorldXZRotation="true" rotMinX="-1.25" rotMaxX="0.2" transMin="0" transMax="0" />
</cameras>

<lights>
<light realLight="0>2|11|0" fakeLight="0>2|11|1" decoration="0>2|11|2" lightType="0"/>
<light decoration="1>15" lightType="0"/>
<light realLight="0>2|12|0" decoration="0>2|12|1" lightType="1"/>
</lights>

<brakeLights>
<brakeLight index="0>2|16" />
<brakeLight index="1>16" />
</brakeLights>

<lightsaddon lightsStayOn="true">
<light type="dirLeft" index="0>2|17" />
<light type="dirRight" index="0>2|18" />
<light type="dirLeft" index="1>17" />
<light type="dirRight" index="1>18" />
<light type="work" index="0>2|13|12" inputName="Kapot1" stayOn="true"/>
<flashers soundfile="sound/blinktick.wav" lowPitch="0.6" highPitch="0.8" volume="0.8" autoreturn="false" tolerance="0.5" pitch="0.5" />
</lightsaddon>

<steering index="0>2|0|0" rotationSpeed="6"/>
<enterReferenceNode index="0>" />
<exitPoint index="0>2|15" />

<trailerAttacherJoints>
<trailerAttacherJoint index="1>7|0|2|0|0" maxRotLimit="15 85 85" ptoOutputNode="1>10" ptoFilename="$data/vehicles/steerable/powerTakeoff.i3d" rootNode="1>"/>
<trailerAttacherJoint index="1>7|0|2|0|0" maxRotLimit="15 85 85" low="true" ptoOutputNode="1>10" ptoFilename="$data/vehicles/steerable/powerTakeoff.i3d" rootNode="1>"/>
</trailerAttacherJoints>

<attacherJoints>
<attacherJoint index="1>6|0|0" rotationNode="1>6" rootNode="1>" minRot="30 0 0" maxRot="-15 0 0" rotationNode2="1>6|0" maxRot2="15 0 0" minRotDistanceToGround="1.022" ptoOutputNode="1>10" ptoFilename="$data/vehicles/steerable/powerTakeoff.i3d">
<bottomArm rotationNode="1>7" translationNode="1>7|0" referenceNode="1>7|0|0" zScale="-1" />
<topArm rotationNode="1>4" translationNode="1>4|0" referenceNode="1>4|0|0|0" zScale="-1" />
</attacherJoint>
</attacherJoints>

<movingTools>
<!-- attacher joint back bottom-->
<movingTool index="1>7">
<!-- cylinder 1 -->
<dependentPart index="1>3" />
<!-- cylinder 2 -->
<dependentPart index="1>5" />
</movingTool>
</movingTools>

<movingParts>
<!-- attacher joint back bottom cylinder 1 -->
<movingPart index="1>3" referencePoint="1>5|2" referenceFrame="1>" invertZ="false">
<translatingPart index="1>3|0" />
</movingPart>
<!-- attacher joint back bottom cylinder 2 -->
<movingPart index="1>5" referencePoint="1>7|0|1" localReferencePoint="1>5|0" referenceFrame="1>" invertZ="false" >
<dependentPart index="1>5|0" />
</movingPart>
<!-- attacher joint back bottom cylinder 2b -->
<movingPart index="1>5|0" referencePoint="1>7|0|1" referenceFrame="1>5|1" invertZ="false">
<translatingPart index="1>5|0|0" />
</movingPart>

<!-- left SteeringHydraulic -->
<movingPart index="0>2|3" referencePoint="1>8" referenceFrame="1>" isActiveDirty="true" playSound="false">
<translatingPart index="0>2|3|0" />
</movingPart>
<!-- right SteeringHydraulic -->
<movingPart index="0>2|4" referencePoint="1>9" referenceFrame="1>" isActiveDirty="true" playSound="false">
<translatingPart index="0>2|4|0" />
</movingPart>

<movingPart index="1>11" referencePoint="0>2|5" referenceFrame="1>11|0" isActiveDirty="true" playSound="false" />
</movingParts>

<animations>
<animation name="rightDoor">
<part node="0>2|1|0" startTime="0" duration="3" startRot="0 0 0" endRot="0 60 0"/>
</animation>
<animation name="leftDoor">
<part node="0>2|2|0" startTime="0" duration="3" startRot="0 0 0" endRot="0 60 0"/>
</animation>
<animation name="rightWindow">
<part node="0>2|1|0|1" startTime="0" endTime="1" startTrans="0.05341 0.49398 -0.48859" endTrans="0.05341 -0.15603 -0.48859"/> <!-- moveSupport -->
</animation>
<animation name="leftWindow">
<part node="0>2|2|0|1" startTime="0" endTime="1" startTrans="-0.05332 0.49136 0.48905" endTrans="-0.05332 -0.16476 0.48905"/> <!-- moveSupport -->
</animation>
</animations>

<characterNode index="0>2|8" cameraMinDistance="1.5" />
<aiTrafficCollisionTrigger index="0>3" />

<exhaustParticleSystems count="1">
<exhaustParticleSystem1 node="0>2|14" position="0 0 0" rotation="0 0 0" file="ExhaustParticleSystem.i3d" />
</exhaustParticleSystems>

<motorStartDuration>3500</motorStartDuration>
<attachSound file="$data/vehicles/steerable/deutz/attach.wav" pitchOffset="1" />
<motorStartSound file="sound/Start.wav" pitchOffset="0.92" volume="1" />
<motorSound file="sound/aiMotorSound.wav" pitchOffset="0.72" pitchScale="0.006" pitchMax="1.65" volume="1.5" />
<motorSoundRun file="sound/Leave.wav" pitchOffset="0.7" pitchScale="0.006" pitchMax="1.65" volume="1.5" />
<motorStopSound file="sound/Stop.wav" pitchOffset="1" volume="1" />
<compressedAirSound file="$data/vehicles/steerable/deutz/compressedAir.wav" pitchOffset="1" />
<honkSound file="$dataS2/sounds/hornBig.wav" volume="1" radius="80" innerRadius="35" />

<articulatedAxis componentJointIndex="0" anchorActor="0" rotSpeed="-42" rotMax="30" rotMin="-30">
</articulatedAxis>

<dynamicExhaustingSystem cap="0>2|7|0" maxRot="-81.5" minAlpha="0.1" maxAlpha="1.0" param="alphaScale" >
<startSequence>
<key time="0.0" value="0 0 0 0"/>
<key time="0.4" value="0 0 0 0.5"/>
<key time="0.58" value="0 0 0 0.2"/>
<key time="0.6" value="0 0 0 0.2"/>
<key time="0.75" value="0 0 0 1"/>
<key time="0.93" value="0 0 0 1"/>
<key time="1.0" value="0 0 0 0.2"/>
</startSequence>
</dynamicExhaustingSystem>

<controlPanels count="1" >
<controlPanel1 index="0>2|10" />
</controlPanels>

<interactiveComponents>
<doors>
<Door name="leftDoor" mark="0>2|2|0|4" size="0.07" animName="leftDoor" onMessage="ic_component_open" offMessage="ic_component_close"/>
<Door name="rightDoor" mark="0>2|1|0|4" size="0.1" animName="rightDoor" onMessage="ic_component_open" offMessage="ic_component_close"/>
</doors>
<windows>
<window name="leftWindow" mark="0>2|2|0|5" size="0.08" animName="leftWindow" onMessage="ic_component_open" offMessage="ic_component_close"/>
<window name="rightWindow" mark="0>2|1|0|5" size="0.1" animName="rightWindow" onMessage="ic_component_open" offMessage="ic_component_close"/>
</windows>
</interactiveComponents>

<fan index="0>2|13|18|2|0"/>
<motor1 index="0>2|13|18|2" minRot="0 0 -1" maxRot="0 0 1" rotTime="3" touchRotLimit="10" />
<crankshaft1 index="0>2|13|21|0"/>
<crankshaft2 index="1>11|0"/>
<crankshaft3 index="1>11|1"/>
<crankshaft4 index="1>12|0|0"/>

<components count="2">
<component1 centerOfMass="0 0 0" solverIterationCount="35" />
<component2 centerOfMass="0 0 0" solverIterationCount="35" />
<joint component1="0" component2="1" index="0>6" rotLimit="0 0 4" transLimit="0 0 0" />
</components>

<schemaOverlay file="$data/vehicles/schemas/vehicleSchema.png" fileSelected="$data/vehicles/schemas/vehicleSchemaSelected.png" width="0.5" height="0.5" attacherJointPosition="0.5 0">
<attacherJoint position="1 0" rotation="0" invertX="false" />
<attacherJoint position="1 0" rotation="0" invertX="false" />
<attacherJoint position="1 0" rotation="0" invertX="false" />
</schemaOverlay>

<twinWheels count="4">
<twinWheel1 index="0>0|2" />
<twinWheel2 index="0>1|2" />
<twinWheel3 index="1>1|2" />
<twinWheel4 index="1>0|2" />
</twinWheels>
<ventelator1 index="0>2|13|36|0"/>

</vehicle>