Pinion Depth Measurement

Pinion depth measurement is taken with the pinion head and tail bearing cups pressed into the axle housing without the shim.

Fig 1: Installing Pinion Head Bearing Cup

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1. Press pinion head bearing cup into housing using Handle C-4171 (1) and Installer C-4310 (2).
   Fig 2: Installing Pinion Tail Bearing Cup

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2. Press pinion tail bearing cup into housing using Handle C-4171 (1) and Installer D-146 (2).
   Fig 3: L-Block, Gage Block & Bearing

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3. Assemble Pinion Height Block 6739 (3), Pinion Head Bearing Cone (1), Screw 6741 (all these can be found in a Pinion Gauge Set such as 6774), and Pinion Height Gage Block 9085 (2). Install assembly into axle housing and through bearing cups.
   Fig 4: Pinion Depth Gauge Tools - Typical

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4. Install pinion tail bearing and Cone 6740 (4). Tighten Cone 6740 by hand until 3.4 N.m (30 in. lbs.) of rotating torque is measured at Screw 6741 (5).
   Fig 5: Removing/Installing Arbor Discs

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5. Install Arbor Discs 9083 (1).
   Fig 6: Removing/Installing Arbor Bar

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6. Install Arbor Bar D-115-3 (1) from a Pinion Gauge Set such as 6774.
   Fig 7: Pinion Gage Setup

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7. Verify pinion depth setup is as shown.
   Fig 8: Indicator/Scooter Block Setup

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8. Install Dial Indicator 9524 (1) to Scooter Block D-115-2A (2) (from a Pinion Gauge Set such as 6774). Secure with set-screw (3).
   Fig 9: Zero Dial Indicator on L-Block

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9. Install Indicator/Block assembly to top of Height Block 6739 (1). Zero indicator on top surface.
   Fig 10: Measuring Arbor Bar

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10. Slide indicator probe off of height block and onto Arbor Bar D-115-3 (2). As indicator contacts Arbor Bar (2), indicator needle will rotate clockwise. Continue moving indicator probe to the crest of the arbor bar and record the highest reading.
    Fig 11: Pinion Gear Face Etchings

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11. Select a shim equal to the dial indicator reading plus the drive pinion gear depth variance number etched into the pinion face (1). For example, if the depth variance is -01, subtract 0.01 mm (0.0004 in.) from dial indicator reading.
    Fig 12: Removing Pinion Head Bearing Cup

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12. Using Handle C-4171 (2) and Remover 9084 (1), drive out pinion head bearing cup and insert specified shim.