Workshop Manuals Factory service & repair Hummer
01 Relays and Modules02 Sensors and Switches03 Maintenance04 Engine, Cooling and Exhaust05 Powertrain Management06 Transmission and Drivetrain07 Brakes and Traction Control08 Starting and Charging09 Power and Ground Distribution10 Steering and Suspension11 Heating and Air Conditioning12 Restraint Systems13 Accessories and Optional Equipment14 Body and Frame15 Cruise Control16 Instrument Panel, Gauges and Warning Indicators17 Lighting and Horns18 Windows and Glass19 Wiper and Washer Systems
Hummer H3 V8-5.3L (2008)03 · Maintenance
03 · Maintenance

Drive Belt: Technical Service Bulletins (page 3 of 4)

Make
Hummer
Model
H3
Engine
V8-5.3L
Year
2008
Section
Drive Belt
MaintenanceTechnical Service Bulletins · page 3 of 4
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Drive Belt: Description and Operation

Drive Belt System Description

The drive belt system consists of the following components:

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The drive belt

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The drive belt tensioner

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The drive belt idler pulley

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The crankshaft balancer pulley

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The accessory drive component mounting brackets

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The accessory drive components

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The power steering pump

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The generator

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The A/C compressor

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The engine cooling fan

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The water pump, if belt driven

The drive belt system may use 2 belts. The drive belt (1) is thin so that it can bend backwards and has several ribs to match the grooves in the pulleys.
The drive belts are made of different types of rubbers - chloroprene or EPDM - and have different layers or plies containing either fiber cloth or cords
for reinforcement.

Both sides of the drive belt may be used to drive the different accessory drive components. When the back side of the drive belt is used to drive a pulley,
the pulley is smooth.

The drive belt is pulled by the crankshaft balancer pulley across the accessory drive component pulleys. The spring loaded drive belt tensioner keeps
constant tension on the drive belt to prevent the drive belt from slipping. The drive belt tensioner arm will move when loads are applied to the drive belt
by the accessory drive components and the crankshaft.

The drive belt system has an idler pulley, which is used to add wrap to the adjacent pulleys.

A/C Compressor Drive Belt

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Parts & tools for this job For 2008 Hummer H3 5.3L

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