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Aftermarket Thermo King® Drive Parts for Reefers & APUs

Thermo Engine Supply stocks aftermarket Thermo King® drive parts for transport refrigeration and APU systems — belts, clutches, idlers, pulleys, bearings, and bushings. Browse by component type below or call (800) 966-3105 for fitment help.

Drive Belts

Select the correct belt by verifying your model, drive configuration, and belt profile. Cross-reference using your unit data plate or a Thermo King® belt guide before ordering. Engine and compressor belts connect the engine to the compressor and are available in V-belt (A, B, C sections), serpentine (K sections), and cogged profiles. Standard fitments cover SB-III, SB-IV, SL-100, SL-200, SL-400, MD-II, MD-III, and Precedent series. Tripac Evolution belts are stocked separately for APU configurations. Alternator and water pump accessory belts maintain charging and engine cooling.

Clutches

Clutches engage and disengage the compressor in response to temperature demand. Electromagnetic clutches use a 12V or 24V signal to engage the compressor pulley. Assemblies include coil, pulley, bearing, and hub. Coil resistance: 3.0 to 4.5 ohms (12V) or 6.0 to 9.0 ohms (24V). Air gap when disengaged: 0.015 to 0.030 inches. Centrifugal clutches engage mechanically at 1,800 to 2,200 RPM and are found in older models. Replace when engagement RPM increases more than 200 RPM or friction material falls below 0.125 inches.

Idlers & Pulleys

Idlers and tensioners maintain belt alignment and tension. Thermo Engine Supply stocks spring-loaded tensioners, fixed idlers, and flat idlers sized by diameter (2.5 to 6 inches) and bore (0.625 to 1.0 inches). Pulley kits bundle drive pulleys for engine, compressor, alternator, and water pump — useful for full system refreshes. Verify pulley diameter, bore size, and keyway dimensions before ordering. Groove wear should not exceed 0.030 inches.

Bearings & Bushings

Sealed ball bearings and durable bronze or composite bushings support rotating shafts, reduce friction, and help maintain proper alignment during operation. These components are designed to withstand repeated movement, heavy loads, vibration, and changing operating conditions while promoting smooth, reliable performance. Regular inspection and timely replacement can help prevent excessive wear, noise, overheating, and damage to surrounding components.

Request Help or Get a Quote

Need help? Call (800) 966-3105 with your unit model and serial number. Our specialists cross-reference fitment for models back to 1998. Phone support available during business hours. Expedited shipping available for urgent breakdowns.

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FANSHAFT REBUILD KIT

Part #: 10-77-2613 KIT

$60.50

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FANSHAFT REBUILD KIT MD'S

Part #: 10-77-2621 KIT

$88.75

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FANSHAFT REBUILD KIT TS RD

Part #: 10-77-2620 KIT

$77.25

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FANSHAFT REBUILD KIT

Part #: 10-77-2617 KIT

$73.75

Out of Stock

IDLER, NYLON, GROOVED

Part #: 10-77-2936

$203.75

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BUSHING KIT, 8 PIN

Part #: 10-70-208

$128.00

Out of Stock

CLUTCH WITH BUSHING, C&S UNITS

Part #: 10-107-396

$2,250.00

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BEARING, SANITARY, SBI, SPRII (2 PACK)

Part #: 10-77-889

$22.75

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BUSHING, DRIVE

Part #: 10-77-2760

$6.75

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CLUTCH, 8PV/12V

Part #: 10-107-262

$151.25

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CLUTCH ASSEMBLY

Part #: 10-107-344

$824.75

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BELT, IDLER TO FANSHAFT

Part #: 10-78-1489

$34.50

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FAN, 255 MILLIMETERS, 12 VOLT DRAW

Part #: 10-78-1185

$167.25

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IDLER ASSEMBLY, TENSIONER

Part #: 10-78-1843

$109.00

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COIL, CONDENSER AUXILIARY POWER UNIT

Part #: 10-67-3184

$159.50

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-1106

$27.25

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IDLER PULLEY KIT, TS MODELS

Part #: 10-70-201

$160.25

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BELT, ENGINE TO MOTOR

Part #: 10-78-1668

$96.25

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BELT, ENGINE TO MOTOR

Part #: 10-78-1688

$56.00

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BELT, MOTOR TO JACKSHAFT

Part #: 10-78-1085

$41.50

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BELT, ALTERNATOR (SET OF 2)

Part #: 10-78-617

$48.50

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BELT, ENGINE TO JACKSHAFT

Part #: 10-78-1089

$37.50

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BELT, CLUTCH (1273)

Part #: 10-78-1485

$58.75

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BELT, ENGINE TO MOTOR (SLX100 ENGINE)

Part #: 10-78-1626

$64.25

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BELT (SET OF 2)

Part #: 10-78-924

$73.50

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BELT, MOTOR TO JACKSHAFT (1266)

Part #: 10-78-1486

$74.75

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BELT, ENGINE TO MOTOR

Part #: 10-78-1669

$93.25

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BELT

Part #: 10-78-1690

$63.00

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BELT

Part #: 10-78-1664

$19.75

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BELT, ALTERNATOR - SMX / SL

Part #: 10-78-336

$8.00

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BELT

Part #: 10-78-1744

$72.50

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BELT, ENGINE TO JACKSHAFT

Part #: 10-78-890

$34.50

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BELT

Part #: 10-78-1692

$86.50

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BELT, MOTOR TO JACKSHAFT

Part #: 10-78-928

$29.00

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BELT, ALTERNATOR, C&S UNIT

Part #: 10-78-1878

$15.50

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BELT, ENGINE TO MOTOR (SLX200 ENGINE)

Part #: 10-78-1624

$51.75

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BELT, MOTOR TO COMPRESSOR, T SERIES

Part #: 10-78-1997

$68.00

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BELT, MOTOR TO COMPRESSOR

Part #: 10-78-1686

$60.00

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BELT, ENGINE / IDLER / COMPRESSOR

Part #: 10-78-897

$54.00

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BELT, IDLER TO FANSHAFT

Part #: 10-78-983

$39.75

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IDLER PULLEY, BACKSIDE

Part #: 10-77-2003

$189.50

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FAN EVAPORATOR COMPRESSOR SIDE (BLACK)

Part #: 10-78-1306

$65.75

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FAN EVAPORATOR ENGINE SIDE (WHITE)

Part #: 10-78-1307

$65.75

Out of Stock

CLUTCH - 2A PULLEY, 12V

Part #: 10-107-241

$139.00

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CLUTCH - 2A PULLEY, 24V

Part #: 10-107-242

$132.00

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BELT, IDLER TO FANSHAFT (1272)

Part #: 10-78-1488

$26.25

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BELT, MOTOR TO COMPRESSOR

Part #: 10-78-1681

$64.50

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BELT, ENGINE TO JACKSHAFT

Part #: 10-78-1487

$23.75

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BELT, IDLER TO FANSHAFT

Part #: 10-78-978

$24.50

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BELT

Part #: 10-78-1691

$59.00

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BELT

Part #: 10-78-1833

$16.00

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BEARING, TENSIONER

Part #: 10-77-3124

$21.25

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BOSS PULLEY, C-201 ENGINE

Part #: 10-77-1366

$32.00

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BELT, ENGINE TO MOTOR T1090

Part #: 10-78-2038

$67.50

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BELT, MOTOR TO COMPRESSOR

Part #: 10-78-1263

$53.00

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BELT, COMPRESSOR TO ALTERNATOR

Part #: 10-78-1655

$22.75

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BELT, FAN

Part #: 10-78-835

$41.00

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BELT, ENGINE TO MOTOR

Part #: 10-78-1350

$84.25

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BELT, MOTOR / JACKSHAFT / COMPRESSOR

Part #: 10-78-899

$63.50

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BELT, WATER PUMP

Part #: 10-78-1011

$15.50

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BELT, COMPRESSOR

Part #: 10-78-1543

$24.00

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-1083

$53.25

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BELT, ENGINE TO MOTOR AND JACKSHAFT

Part #: 10-78-1724

$91.25

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BELT, ALTERNATOR - SLE

Part #: 10-78-809

$7.75

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IDLER PULLEY, V-GROOVE

Part #: 10-77-2004

$185.75

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COUPLING ASSEMBLY STANDARD (8 PACK)

Part #: 10-77-2358

$162.50

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BELT

Part #: 10-78-1866

$15.25

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BELT, MOTOR / JACKSHAFT / COMPRESSOR

Part #: 10-78-689

$14.75

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BELT, ENGINE

Part #: 10-78-1484

$26.50

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-977

$50.25

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BELT

Part #: 10-78-1858

$23.75

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BELT

Part #: 10-78-1857

$24.75

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BELT, ENGINE TO ALTERNATOR

Part #: 10-78-1876

$30.75

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BELT

Part #: 10-78-1875

$22.25

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BEARING, COMPRESSOR SHIELD C5

Part #: 10-77-2872

$158.00

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COUPLING ASSEMBLY 2.2 DIESEL INJECTION LARGE SHAFT

Part #: 10-77-2509

$162.00

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COUPLING ASSEMBLY 2.2 DIESEL INJECTION

Part #: 10-77-2504

$151.25

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BELT, ENGINE / COMPRESSOR / IDLER

Part #: 10-78-900

$58.75

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-1031

$36.75

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BELT, ENGINE TO MOTOR (TS-600 MODELS)

Part #: 10-78-1353

$87.75

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BELT MOTOR TO COMPRESSOR T1000R/1280

Part #: 10-78-1946

$82.75

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BELT, ENGINE TO COMPRESSOR (X430)

Part #: 10-78-1051

$37.00

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BELT

Part #: 10-78-1720

$20.25

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BELT

Part #: 10-78-1859

$31.75

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BELT

Part #: 10-78-1865

$15.00

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BELT

Part #: 10-78-1863

$15.25

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BELT

Part #: 10-78-1862

$34.00

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BELT FAN DRIVE SLX

Part #: 10-78-1945

$71.00

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BELT, WATER PUMP

Part #: 10-78-767

$11.75

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BEARING, SEALED X214 MOTOR

Part #: 10-77-2311

$93.00

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BELT, FAN DRIVE

Part #: 10-78-1000

$49.75

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BELT, COMPRESSOR TO EVAPORATOR FAN

Part #: 10-78-800

$24.50

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BELT, ENGINE TO COMPRESSOR, SLX

Part #: 10-78-1831

$43.50

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BELT, T-680S AND T-880S

Part #: 10-78-1883

$90.00

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BELT, MOTOR TO COMPRESSOR 3.95

Part #: 10-78-1067

$64.50

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BELT, ENGINE / IDLER / COMPRESSOR

Part #: 10-78-896

$64.75

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BUSHING ISOLATOR-DRIVE

Part #: 10-77-3169

$10.25

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BELT, AUXILIARY POWER UNIT

Part #: 10-78-1918

$20.25

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BELT, EVAPORATOR FAN

Part #: 10-78-766

$19.75

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BELT, MOTOR / JACKSHAFT / COMPRESSOR

Part #: 10-78-898

$45.00

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BELT

Part #: 10-78-1860

$32.75

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CLUTCH - 8-GROOVE POLY-V PULLEY, 24V

Part #: 10-107-261

$159.25

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BELT, WATER PUMP

Part #: 10-78-679

$11.25

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BELT, ENGINE

Part #: 10-78-1634

$20.50

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BEARING, COMPRESSOR SHIELD C5

Part #: 10-77-2872AM

$114.25

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BELT, WATER PUMP (376)

Part #: 10-78-1736

$13.50

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PULLEY ASSEMBLY, NYLON

Part #: 10-77-3037

$87.00

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BELT, ALTERNATOR TO WATER PUMP

Part #: 10-78-471

$11.75

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FAN, CONDENSER, 12 INCHES

Part #: 10-78-1560

$219.25

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BELT, COMPRESSOR TO EVAPORATOR FAN

Part #: 10-78-698

$21.50

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BELT, ENGINE TO IDLER

Part #: 10-78-604

$26.50

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BELT, MOTOR TO COMPRESSOR 374

Part #: 10-78-1129

$54.50

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BELT, MOTOR TO COMPRESSOR

Part #: 10-78-1689

$72.50

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BELT, ALTERNATOR

Part #: 10-78-751

$29.75

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-1366

$42.50

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BELT

Part #: 10-78-1877

$36.50

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BELT, MOTOR / JACKSHAFT / COMPRESSOR

Part #: 10-78-936

$15.00

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IDLER PULLEY KIT, TS MODELS

Part #: 10-70-200

$207.50

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BELT, ENGINE TO MOTOR 374 / 395

Part #: 10-78-1351

$69.75

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CENTRIFUGAL CLUTCH

Part #: 10-107-341

$884.25

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COUPLER ASSEMBLY, X430P

Part #: 10-77-3045

$260.25

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BELT, ALTERNATOR - MULTI TEMPERATURE

Part #: 10-78-1360

$22.50

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IDLER PULLEY KIT

Part #: 10-70-199

$162.50

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BELT, ENGINE TO COMPRESSOR

Part #: 10-78-1367

$42.75

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BELT, ALTERNATOR TO EVAPORATOR FAN

Part #: 10-78-700

$18.50

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EVAPORATOR FAN WITH CLAMP

Part #: 10-78-558

$27.25

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BELT, FAN

Part #: 10-78-844

$42.75

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BELT, COMPRESSOR DRIVE (SET OF 2)

Part #: 10-78-785

$67.50