Hummer H1 (2006+). Manual - part 189

4-36

Cooling System

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11. Remove the four bolts securing the fan case to the main case and remove the fan case assembly (Figure  4-33).

Figure 4-33:   Fan Case Removal and Installation

CAUTION: DO NOT impact the output shaft out of the housing, damage to the shaft, bearing or the housing may result.

12. Press the output shaft out of the fan case and remove the seal  (Figures 4-34 and 4-35).

O-RING SEAL

FAN CASE 

BOLT

OUTPUT SHAFT

BEARING

MAIN CASE

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 Cooling System  4-37

5745804

Figure 4-34:   Output Shaft Removal and Installation

NUT

FAN CASE

OUTPUT SHAFT

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4-38

Cooling System

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Figure 4-35:   Output Shaft Seal Removal and Installation

Assembly

1.

Using tool EN-48031 install the output shaft seal into the fan case and apply a light coat of gear oil on the seal lips (Figure
 4-35).

2.

Press the output shaft into the fan case bearing (Figure  4-34).

CAUTION: When installing the fan case assembly into the main housing, care must be taken not to knock the rollers out of the
bearing on the output shaft.

3.

Apply a light coat of gear oil on the output shaft bearing, install a new o-ring seal on the main case for the fan case and install
the fan case assembly. Apply medium strength thread locker to the bolts and torque to 25 lb. ft. (34 N•m) (Figure  4-33).

4.

Using tool EN-48031 install the input shaft seal in the rear case and apply a light coat of gear oil on the seal lips (Figure  4-36).

FAN CASE

OUTPUT SHAFT

SEAL

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 Cooling System  4-39

5745804

Figure 4-36:   Input Shaft Seal Removal and Installation

CAUTION: When installing the transfer shaft assembly in the rear case, the gerotor end of the shaft protrudes past the rear case
and may be damaged if the rear case is not properly supported.

5.

Install the transfer shaft assembly and the input gear into the rear case and install a new o-ring seal (Figure  4-32).

6.

Install the main case onto the rear case and torque the bolts to 18.5 lb. ft. (25 N•m).

CAUTION: When pressing the input shaft in, the bearing in the main case must be supported or the case and the snap ring may be
damaged.

REAR CASE

EN-48031

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