Centinel System – Repair Manual – 001-024   Crankshaft Seal, Rear

The rear crankshaft seal requires the rear crankshaft seal replacer kit, Part Number 3164780, for the seal removal and installation.

1. Replacer plate
2. Pilot drill
3. Replacer screw
4. Self-tapping screw x 10
5. Stud x 3
6. Hex nut x 3.

Use three flywheel mounting capscrews to secure the replacer plate (1) to the crankshaft.

Install a pilot drill (2) into one of the holes in the rear crankshaft seal tool and drill a hole through the seal casing.

Remove the pilot drill (2) and repeat the procedure for at least two more evenly spaced holes of the rear crankshaft seal tool. As many as six holes may be drilled to assist in removing the rear crankshaft seal.

NOTE: Three stud screws (3) and three hex nuts (4) are required for some engines with flywheel mounting capscrews that are too short to mount the replacer plate (1) to the crankshaft.

NOTE: Three guide pins, Part Number 3164765, are required on REPTO applications to support the REPTO crankshaft gear and the replacer plate.

Install at least three self-tapping screws (1) into the replacer plate (2).

Remove the flywheel capscrews from the rear crankshaft seal tool.

Install the replacer screw (3) into the center hole of the replacer plate and turn clockwise to remove the seal.

Measure the protrusion of the outer rubber portion (A) of the seal relative to the inner metal portion of the seal (B).

Set the dial indicator to zero on the inner metal portion of the seal.

Measure and record the protrusion of the outer rubber portion of the seal. Repeat the measurement in four locations equally spaced around the crankshaft seal.

The protrusion measurement at each location must be within +/- 1 mm [+/- 0.04 in]. The difference between any of the four protrusion measurements must be within +/- 0.5 mm [0.02 in].

If either of these conditions are not met, the rear crankshaft seal must be removed and a new seal installed.