Hummer H3. Manual — part 917

CLUTCH PEDAL HARD TO PUSH

Clutch Pedal Hard to Push

The clutch hydraulic fluid for
contamination of water

The reservoir cap for being faulty
if water is present

The clutch hydraulic fluid for dirt
or debris

2. Flush and bleed the clutch hydraulic

system if the above conditions are found.
Refer to Hydraulic Clutch Bleeding.

Cause

Action

DEFINITION: The clutch pedal requires high effort to operate.
Review the Symptoms - Clutch and perform the necessary inspections.
Incorrect hydraulic fluid

1. Inspect for the correct fluid in the

master cylinder. Refer to Hydraulic
Clutch Bleeding.

2. Flush the hydraulic system and fill with

the correct fluid.

Contaminated hydraulic fluid

1. Inspect the hydraulic fluid for water.

2. Inspect the hydraulic fluid for dirt or

debris.

3. Flush the hydraulic system and fill with

the correct fluid. Refer to Hydraulic
Clutch Bleeding.

Clutch pedal binding

1. Inspect the pedal for binding.

2. Repair or replace the pedal. Refer to

Clutch Pedal Replacement.

Kinked or damaged clutch hydraulic pipe

1. Inspect for a kinked or damaged

hydraulic hose.

2. Repair or replace the clutch hydraulic

hose. Refer to Clutch Master Cylinder
Replacement.

Clutch disc worn too thin

Replace the clutch assembly. Refer to Clutch

2007 Hummer H3

2007 TRANSMISSION Clutch - H3

CLUTCH VIBRATION

Clutch Vibration

REPAIR INSTRUCTIONS

CLUTCH PEDAL REPLACEMENT

Removal Procedure

Assembly Replacement.

Cause

Action

DEFINITION: Vibration from the clutch components during disengagement or engagement.
Review the Symptoms - Clutch and perform the necessary inspections.
Excessive driveline torsional activity

Review the Vibration Analysis - Driveline .

Clutch incorrectly installed

Remove the clutch and install it correctly.
Refer to Clutch Assembly Replacement.

Pilot bearing worn or damaged

1. Replace the pilot bearing. Refer to

Clutch Pilot Bearing Replacement.

2. Inspect the input shaft pilot bearing

journal for wear or damage.

3. Replace the input shaft if damaged or

worn. Refer to Transmission
Disassemble .

Transmission input splines worn or damaged

1. Inspect the clutch disc to input splines

for wear or damage.

2. Replace the input shaft if the splines are

excessively worn. Refer to
Transmission Disassemble .

Clutch disc facings damaged

Replace the clutch assembly. Refer to Clutch
Assembly Replacement.

Flywheel housing to clutch housing
excessively misaligned

Replace the faulty transmission front case.
Refer to Transmission Disassemble .

Clutch out of balance

Replace the clutch assembly. Refer to Clutch
Assembly Replacement.

2007 Hummer H3

2007 TRANSMISSION Clutch - H3

Fig. 1: View Of Clutch Release Switch Electrical Connector
Courtesy of GENERAL MOTORS CORP.

1. Disconnect the electrical connectors (2, 4) from the following components:

The clutch pedal position switch (1)

The cruise control release switch (3)

2007 Hummer H3

2007 TRANSMISSION Clutch - H3

Fig. 2: View Of Clutch Pedal & Clutch Master Cylinder Push Rod
Courtesy of GENERAL MOTORS CORP.

2. Complete the following in order to disengage the retainer (3) from the clutch pedal pin.

1. Insert a flat-bladed tool (4) between the clutch master cylinder push rod (1) and the

clutch pedal (2).

2. Pry the clutch master cylinder push rod (1) away from the clutch pedal assembly (2).

Discard the retainer (3).

IMPORTANT: A new retainer (3) is required after removal.

2007 Hummer H3

2007 TRANSMISSION Clutch - H3