Department 1.viii
Crankshaft Oil Seals

An oil seal is fitted between each stop of the crankshaft and the bores of the flywheel housing and gear case embrace to retain the lubricating oil in the crankcase. In certain applications, the seal must also prevent manual oil from migrating into the engine. Seals are pressed into the bores later on the housing or cover is assembled to the engine. Run across Figures "Crankshaft Rear Oil Seal" and .‪

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Effigy ane. Crankshaft Rear Oil Seal

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Figure two. Crankshaft Forepart Oil Seal

Current seals feature a lay down sealing lip of low-friction PTFE with unidirectional screw pumping grooves. An outer dust-exclusion lip keeps airborne clay abroad from the chief sealing lip. The sealing lip does not touch the crankshaft, because an integral wear sleeve provides the running surface and protects the lip during installation. A separate replacement article of clothing sleeve is not needed. The wear sleeve and outer carrier are joined together, forming a unitized seal assembly.‪

Because of the spiral grooves on the sealing lip, a front crankshaft seal will leak if installed at the rear, and a rear crankshaft seal volition leak if installed at the front.‪

Wet-flywheel-housing applications require a double-lip rear seal to prevent transmission oil from migrating into the engine. This seal is similar to the single lip seals except for the extra lip, and the wearable sleeve and outer carrier are non joined together.‪

Notice:

Failure to use the correct seal according to location on the engine or according to flywheel housing type or application may issue in seal damage, oil leakage, or damage to the engine and the vehicle or equipment into which it is installed.‪

All engines may exist serviced with the current-product front seal. Notwithstanding, engines built before serial number 06R0491683 were built with a different design of rear crankshaft seal (dry flywheel housings only). This seal may not be serviced with the electric current rear seal because the current rear seal requires a cast-in rib on the flywheel housing and cake to direct additional oil to the seal for cooling. See Figures "Bandage-in-Rib Front end View" and .

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 i. Rib Location‪

Effigy 3. Cast-in-Rib Front View

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 1. Rib Location‪

Figure 4. Cast-in-Rib Rear View

‪

Service replacements of the old design rear seal are shipped as an assembly consisting of a seal installed over a dissever wear sleeve. The sleeve is pressed onto the crankshaft hub with the seal to provide a new running surface. This sleeve must be installed with replacement seals to forbid seal damage or oil leakage.‪

Section 1.8.1
Replacement of Oil Seal

To determine if replacement is necessary, perform the following procedure. See Figure "Flowchart for Replacement of Crankshaft Oil Seal" . To make up one's mind whether flywheel housing runout is excessive,refer to "1.eighteen.3.1 Test for Flywheel Housing Diameter Concentricity" .‪

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Effigy 5. Flowchart for Replacement of Crankshaft Oil Seal

Section 1.8.2
Removal of Front end or Rear Crankshaft Oil Seal (Gear Example Encompass or Flywheel Housing Removed)

Perform the following procedures to remove the crankshaft seal from the gear case cover or flywheel housing if the cover or housing has been removed from the engine.‪

Observe:

Due to the possibility of harm to the crankshaft oil seals, any time the gear case cover or flywheel housing is removed from the engine, the crankshaft oil seals must exist replaced.‪
  1. Support the outer face of the gear case housing or flywheel housing on woods blocks.
  2. Bulldoze the oil seal out with a contumely drift and hammer. Clean the seal bore in the gear case cover or flywheel housing and clean the surfaces of the crankshaft. See Figure "Crankshaft Oil Seal Removal" .

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    Figure vi. Crankshaft Oil Seal Removal

    Annotation: Crocus fabric may exist used to remove dirt and rust and to make clean up the high spots from the surface of the crankshaft and gear case embrace or flywheel housing bore. Clean the contact surfaces thoroughly.

  3. If the crankshaft oil seal wear sleeve remains installed on the hub of the crankshaft, reinstall the gear case cover or flywheel housing.
  4. Remove the wearable sleeve using wear sleeve remover (J–37075–A) . See Figure "Crankshaft Wear Sleeve Remover Tool" .Refer to "one.8.4 Removal of Wear Sleeve from Crankshaft Hub" .

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    Figure 7. Crankshaft Wear Sleeve Remover Tool

Section ane.8.iii
Removal of Front or Rear Crankshaft Oil Seal (Gear Case Cover or Flywheel Housing Still Installed)

The crankshaft oil seals may be taken out without removing the gear example cover or flywheel housing. This may be done by using crankshaft oil seal removal tool (J–41329) .‪

Note: To assist seal removal, thoroughly clean all rust and dirt from the crankshaft surface. Awarding of penetrating oil to the wear sleeve and crankshaft hub may as well aid seal removal.

Remove the seal as follows:‪

  1. Install the crankshaft oil seal removal tool (J–41329) over crankshaft and hold against seal. See Effigy "Removing Front Crankshaft Oil Seal from Gear Case Encompass or Flywheel Housing" .
  2. Using a variable speed drill motor and five/32 inch drill fleck, drill through outer and inner example of seal using the smallest hole "A" equally a guide.
  3. Without moving the removal tool (J–41329) , drill 5 additional "A" holes equally spaced. Run across Figure "Removing Front Crankshaft Oil Seal from Gear Instance Comprehend or Flywheel Housing" .

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    Figure eight. Removing Front end Crankshaft Oil Seal from Gear Instance Embrace or Flywheel Housing

    Note: Use all six holes to ensure removal is successful. Drive screws advisedly, the threads can strip easily when using an electric commuter.

  4. Remove any metal fries from the face of the seal, the crankshaft and the diameter surface.
  5. Rotate the removal tool (J–41329) clockwise until the "B" holes align with drilled holes and install sheet metal screws.
  6. Apply extreme pressure level lubricant (J–23444–A, part of tool set J–41329) to forcing screw and remove seal.

    Annotation: Seals may exist difficult to remove due to debris on the crankshaft preventing the wearable sleeve from passing over the crankshaft. Button the seal 1/viii inch, make clean the crankshaft surface thoroughly and repeat the removal procedure. Application of penetrating oil to the clothing sleeve and crankshaft hub may besides assistance seal removal.

  7. Remove the sheet metal screws from the tool. Discard the oil seal.
  8. If a crankshaft oil seal wear sleeve remains installed on the hub of the crankshaft, remove the article of clothing sleeve using the wear sleeve remover (J–37075–A) . Refer to "1.viii.4 Removal of Habiliment Sleeve from Crankshaft Hub" for removal instructions.
  9. Clean the seal bore in the gear case encompass or flywheel housing and clean the surfaces of the crankshaft.

    Annotation: Crocus cloth may be used to remove dirt, rust and to clean up the high spots from the surface of the crankshaft and gear case cover bore. Thoroughly make clean the contact surfaces.

Department 1.8.4
Removal of Wear Sleeve from Crankshaft Hub

If the seal that was removed used a separate wear sleeve, the old wear sleeve must also be removed. Employ the post-obit procedure to remove wear sleeve.‪

  1. Remove worn wear sleeve using crankshaft wear sleeve remover tool (J–37075–A) . See Figure "Rear Oil Seal Wear Sleeve Removal"
  2. Install the protective hardened steel sleeve removal tool into the diameter of the gear example cover or flywheel housing. Insert tool between protective sleeve and wear sleeve. Using a socket and breaker bar, rotate tool in three different locations, 2, 4 and 8 o'clock positions, to score the sleeve until sleeve stretches sufficiently enough to exist slipped off the end of the crankshaft.

    Annotation: Crocus fabric may be used to clean upward the loftier spots from the surface of the crankshaft.

  3. Thoroughly clean the crankshaft contact surface.

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    Figure ix. Rear Oil Seal Wear Sleeve Removal

Department one.8.5
Installation of Front and Rear Crankshaft Oil Seal and Wear Sleeve

All replacement oil seals provide a replacement vesture surface at the betoken of contact with the sealing lip. The oil seal assembly is installed using the crankshaft oil seal sleeve installation tool set (J–35686–B) .‪

See Effigy "Crankshaft Oil Seal and Sleeve Installation Tool Set (J–35686–B)" for the full general installation tool fix.‪

The collar and spacer usage is dependant on the part number of the seal to exist installed. Come across Table "Crankshaft Seal Tool Application" .‪

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 1. Thrust Bearing‪

 3. Guide Stud Retaing O-ring‪

 ii. Crankshaft Seal‪

Figure 10. Crankshaft Oil Seal and Sleeve Installation Tool Set (J–35686–B)

Crankshaft Seal Application ‪

Seal Part Number ‪

Collar ‪

Spacers ‪

Front‪

23518355‪

J–35686–20‪

J–35686–11‪

Rear, Dry Housing‪

23516969 (assembly contains seal role no. 23501544)‪

J–35686–10‪

J–35686–6 and J–35686–xi‪

Rear, Dry Housing‪

23519651‪

J–35686–20‪

J–35686–half-dozen and J–35686–11‪

Rear, Wet Housing‪

23513578‪

J–35686–10‪

J–35686–vi and J–35686–11‪

Table 7. Crankshaft Seal Tool Application

Discover: ‪

Ensure that the crankshaft hub and bolt surface, gear instance comprehend, flywheel housing diameter and contact surfaces of the installation tools are free of dirt, grit, rust or raised metal. Clean thoroughly with crocus cloth if needed. Ensure that an erstwhile wear sleeve is non installed onto the crankshaft hub. Refer to "one.8.4 Removal of Article of clothing Sleeve from Crankshaft Hub" for clothing sleeve removal instructions.‪

Detect: ‪

The incorrect installation of the oil seal volition crusade immediate seal leakage, or will reduce the life of the seal significantly.‪

Perform the followings steps to install the front end and rear oil seals and sleeves:‪

  1. Lubricate the rubber outer diameter of the oil seal with clean engine oil. Lubricate the gear case comprehend or flywheel housing bore with clean engine oil.

    Discover: ‪

    Failure to lubricate the outside of the seal and the inside of the bore prior to installation may damage seal causing seal to leak.‪
  2. Install two guide studs (J–35686–2, part of tool set J–35686–B) through the holes provided in the center guide associates (J–35686–1, office of tool ready J–35686–B) and into ii of the tapped holes in the crankshaft 180 degrees apart. Tighten the guide studs using the advisable wrench on the flats of the studs. The base of operations must exist tight against the cease of the crankshaft. See Figure "Crankshaft Oil Seal and Sleeve Installation Tool Set (J–35686–B)" .
  3. Install the spacers to the center screw of the base. Refer to Table "Crankshaft Seal Tool Application" and Figure "Spacer Installation" .

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    Effigy 11. Spacer Installation

  4. Slide the oil seal assembly over the installer base equally far onto the crankshaft hub as possible. Slide collar with the stepped side contacting the seal. Slide the installer cup over the guide studs and installer base. See Figure "Oil Seal and Sleeve Installation" and Table "Crankshaft Seal Tool Application" .

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    Effigy 12. Oil Seal and Sleeve Installation

  5. Lubricate the center screw of the base of operations with extreme force per unit area lubricant (J–23444–A, role of tool set J–41329) . Install the thrust bearing with the case side toward the installer cup and install the hex nut to the center spiral of the base of operations. See Effigy "Thrust Begetting Installation" .

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    Figure xiii. Thrust Bearing Installation

  6. Finger tighten the hex nut until snug.
  7. Install a ratchet and socket onto the hex nut.
  8. Tighten the hex nut until the oil seal and wear sleeve are pressed into the flywheel housing or gear case comprehend.
  9. When the inside surface of the housing is seated firmly against the base and spacers the seal and sleeve are properly installed. Remove tools.
  10. Measure out the face squareness of the outside diameter of the crankshaft seal using a runout gage installed on the crankshaft. If the total indicator reading is more and then 0.762 mm (0.030 in.) the seal must exist removed and a new seal installed.