Hummer H2. Manual — part 1143

J 43679

Panasonic Battery Removal Tool (HP2)

J 46093

Rotor and Flexplate Holding Tool (HP2)

Panasonic Battery Test Terminals (HP2)

2004 Hummer H2

2004 ELECTRICAL Engine Electrical - Hummer H2

2004 STARTING & CHARGING SYSTEMS

Starters - H2

DESCRIPTION & OPERATION

The PG-260L is an non-repairable starter motor. It has pole pieces that are arranged around the armature within
the starter housing. When the solenoid windings are energized, the pull-in winding circuit is completed to
ground through the starter motor. The hold-in winding circuit is completed to ground through the solenoid. The
windings work together magnetically to pull in and hold in the plunger. The plunger moves the shift lever. This
action causes the starter drive assembly to rotate on the armature shaft spline as it engages with the flywheel
ring gear on the engine. At the same time, the plunger closes the solenoid switch contacts in the starter solenoid.
Full battery voltage is then applied directly to the starter motor and it cranks the engine.

As soon as the solenoid switch contacts close, current stops flowing thorough the pull-in winding as battery
voltage is now applied to both ends of the windings. The hold-in winding remains energized; its magnetic field
is strong enough to hold the plunger, shift lever, starter drive assembly, and solenoid switch contacts in place to
continue cranking the engine. When the engine starts, the pinion gear overrun sprag protects the armature from
excessive speed until the switch is opened.

When the ignition switch is released from the CRANK position, voltage is removed from the starter solenoid S
terminal. Current flows from the motor contacts through both windings to ground at the end of the hold-in
winding. However, the direction of the current flow through the pull-in winding is now in the opposite direction
of the current flow when the winding was first energized.

The magnetic fields of the pull-in and hold-in windings now oppose one another. This action of the windings,
along with the help of the return spring, cause the starter drive assembly to disengage and the solenoid switch
contacts to open simultaneously. As soon as the contacts open, the starter motor is turned off.

STARTER MOTOR USAGE

Vehicle uses starter model PG-260L.

BATTERY USAGE

BATTERY SPECIFICATIONS

COMPONENT LOCATOR

Application

Rating

Cold Cranking Amperage (CCA)

880 Amps

Reserve Capacity Rating

115 Minutes

Replacement Battery Number

79-6YR

2004 Hummer H2

2004 STARTING & CHARGING SYSTEMS Starters - H2

2004 Hummer H2

2004 STARTING & CHARGING SYSTEMS Starters - H2

Fig. 1: Locating Battery Cable Junction
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2004 STARTING & CHARGING SYSTEMS Starters - H2

Fig. 2: Locating Park/Neutral Switch (A/T)
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2004 STARTING & CHARGING SYSTEMS Starters - H2