Truck/Trailer Refrigeration Unit - Sunbelt Transport Refrigeration

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4.5.2 Servicing and Adjusting V-belts (TruckUnits)Table 4-1. Belt Tension (Truck Units)(See Figure 4-5)BELTSTensionCT3-44TV engine (D722) Water pump 30 to 40Engine to Compressor 30 to 50Alternator 30 to 50Standby Motor to Compressor 30 to 50Standby Motor to 1ph Alternator / Gen 30 to 50Engine1 2 3StandbyMotor4CompressorSingle PhaseAlternator (Generator)1. Engine to Compressor V-Belt2. Alternator V-Belt3. Standby Motor to Compressor V-Belt4. Standby Motor to Single Phase Alternator(Generator) V-BeltFigure 4-6. V-Belt Arrangement (Truck Units)a. Alternator V-Belt (Truck Units)1. Make sure negative battery terminal isdisconnected.2. Place V-belt on alternator sheave and drivingpulley.3. Pivot alternator to place tension on belt usinghand force only. Do not use pry bar or excessive force as itmay cause bearing failure. For correct belt tension seeTable 4-1. Tighten pivot and adjustment bolts.b. Water Pump Belt Tensioner (Truck Units)Water pump belt is driven by the diesel enginecrankshaft pulley. The automatic belt tensioner ensuresthe correct tension.To change the water pump belt, proceed as follows:1. To compress the tensioner spring, place athreaded bolt or rod into hole and turn clockwise. Thiswill draw the spring up and slacken V-belt for easyremoval.2. After replacing V-belt, remove the bolt torelease the spring to return the idler to the correcttension.c. Standby Motor--Compressor V-Belt (TruckUnits)1. Remove alternator V-belt.2. Loosen the V-belt idler securing bolt (22mm).3. Replace V-belt and alternator V-belt. Position theidler to correct belt tension. Tighten the idler retaining bolt.d. Single phase Alternator (generator) V-Belts(Truck Units)1. Loosen single phase alternator bolts.2. Replace V-belt and check belt tension. Tightenthe alternator bolt.e. Engine--Compressor V-Belts (Truck Units)1. To allow for easy removal, installation andadjustment of the V-belts, it is recommended that themuffler be disconnected from the muffler bracket andmoved.2. Remove alternator V-belt.3. Remove the standby motor---compressor V-belt.4. Loosen belt idler bolt (24 mm). Move idler toremove V-belts.5. Replace V-belts. Position the idler to the correctbelt tension. Tighten the idler retaining bolt.4.5.3 Servicing and Adjusting V-belts (Trailer Unit)Table 4-2. Belt Tension (Trailer Unit)(See Figure 4-5)BELTSTensionWater pump 35 to 40Condenser Fan 35 to 40Generator 50 to 55Alternator 80 to 90Standby Motor 50 to 551StandbyMotor2CondenserMotorGenerator4Alternator1. Condenser Fan V-Belt2. Standby Motor V-Belt Set3. Generator V-Belt4. Alternator V-BeltFigure 4-7. V-Belt Arrangement (Trailer Unit)3Change 09/954-7 62-02884
a. Alternator V-Belts (Trailer Unit)1. Make sure negative battery terminal isdisconnected.2. Remove generator V-belt and then alternatorV-belt (see Figure 4-7).3. Place V-belt on alternator sheave and theninstall alternator with two bolts loosely in position.4. Check the center alignment of the generatordriving pulley and alternator pulley to ensure properdrive. Pulley misalignment will create excess belt wearand limit alternator bearing life. The center line of thealternator sheave and the driving sheave must be in line.5. Pivot alternator to place tension on belt usinghand force only. Do not use pry bar or excessive force as itmay cause bearing failure. For correct belt tension, seeTable 4-1. Tighten pivot and adjustment bolts.6. Replace generator V-belt.b. WaterPumpV-Belt(TrailerUnit)The water pump V-belt is driven by a sheave on theengine crankshaft. Frayed, cracked or worn belts must bereplaced. Adjustment is achieved by altering the positionof the front side idler.When replacing V-belt, avoid excessive force whenapplying tension to the V-belt to prevent damage to thewater pump bearings. (Refer to Table 4-1)c. Condenser Fan V-Belt (Trailer Unit)1. Disconnect negative battery cable.2. Through top of the unit, loosen condenser fanidler pulley.3. Remove old belt and replace with new belt. (SeeFigure 4-7)4. Using a belt tension gauge (Figure 4-5) on thebelt, rotate idler pulley so that the gauge reads the correcttension (refer to Table 4-1).5. Tighten idler and carriage bolt.6. Operate unit for 5 to 10 minutes. Repeat steps 4and 5.d. GeneratorV-Belt(TrailerUnit)1. Disconnect negative battery cable and removeV-belt guard. Loosen idler bolt.2. To remove generator V-belt from drive shaft,follow instructions for standby motor V-belt.3. Replace belt using a belt tension gauge(Figure 4-5) on the belt, rotate idler pulley so that thegauge reads the correct tension (refer to Table 4-1).4. Tighten idler and carriage bolt.5. Start unit and run for 10 minutes to allow for beltstretch.6. Turn unit off and recheck belt tension.e. Standby Motor V-belts (Trailer Unit)NOTEThe standby motor V-belts are a matched set.Always replace both belts.1. Remove V-belt guard.2. Remove six bolts on rear face of clutch flange(see Figure 4-8).3. Slide clutch flange forward inside clutch sheaveuntil holes line up, and press forward for ease of beltremoval.4. Remove and replace V-belt through opening.5. Adjust belt tension as indicated in Table 4-1.Install V-belt guard. DO NOT START UNIT UNTILV-BELT GUARD IS INSTALLED.6. Start unit and run for 10 minutes to allow for beltstretch.7. Turn unit off and recheck belt tension.Figure AFigure BFigure 4-8. Removing V-Belt from Clutch (Trailer)62-028844-8
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TABLE OF CONTENTS (CONT’D)Section
Page 7 and 8:
LIST OF ILLUSTRATIONSFigurePage4-18
Page 9 and 10: 61 2 3 4 57 811 1091. Muffler2. Eng
Page 11 and 12: 213 4 58 106793 41. Run-Stop Switch
Page 13 and 14: 113214345678910151617111812191. Mai
Page 15 and 16: 1231. Fault Light2. Standby Power L
Page 17 and 18: e. EvaporatorsThe compartments of t
Page 19 and 20: 1.2 ENGINE DATAEngine Model CT4-134
Page 21 and 22: 1.7 SAFETY DEVICESSystem components
Page 23 and 24: 2 3 4 5 6 7 8 9 101FUNCTIONO ISETPO
Page 25 and 26: 1.8.6 FUNCTIONAL PARAMETERSThe func
Page 27 and 28: Engine HoursThe number of diesel en
Page 29 and 30: Coolant Temperature Sensor AlarmThe
Page 31 and 32: g. Minimum On-TimeThe engine is all
Page 33 and 34: 1.12.3 Hot Gas Bypass Unloadera. Ma
Page 35 and 36: 1.14 REFRIGERANT CIRCUIT DURINGCOOL
Page 37 and 38: 1614513LSV31715HGV31614513LSV21715H
Page 39 and 40: 1614513LSV3 (NC)1715HGV3 (NC)161451
Page 41 and 42: 2.2.2 MANUAL STARTINGa. Starting In
Page 43 and 44: 2.6 CONTROL CIRCUIT OPERATION --STA
Page 45 and 46: FALLING TEMPERATURERISING TEMPERATU
Page 47 and 48: 62-028842-8Table 2-3. 3 Compartment
Page 49 and 50: INDICATION/TROUBLEPOSSIBLE CAUSESRE
Page 55 and 56: 4.2 MAINTENANCE SCHEDULE (TRAILER)U
Page 57 and 58: 1105432shaft). Energize solenoid fo
Page 59: . Electrical Pump (See Figure 4-4)T
Page 63 and 64: 4.7 PUMPING THE UNIT DOWN ORREMOVIN
Page 65 and 66: 1. Suction Line2. Equalizer Line3.
Page 67 and 68: k. Slide compressor enough to clear
Page 69 and 70: . Solenoid Coil ReplacementNOTEThe
Page 71 and 72: 4.18.2 Solenoid Valve -- Sporlana.
Page 73 and 74: 4.22 CONFIGURATION OF MICROPROCESSO
Page 75 and 76: 4.25 5KW GENERATOR -- TRAILERThe 5K
Page 77 and 78: 4.27 SERVICING PHASE SEQUENCEWARNIN
Page 79 and 80: 4.30 THERMOSTATIC EXPANSION VALVETh
Page 81 and 82: Table 4-7. R-404A Pressure -- Tempe
Page 83 and 84: 62-028845-2Figure 5-1. Truck Units
Page 85 and 86: 5-4Figure 5-2. Truck Units --- Elec
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Truck/Trailer Refrigeration Unit - Sunbelt Transport Refrigeration

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