User Manual

200 ENGINE ASSEMBLY
Page 6-45
[211 SB] TIMING GEAR COVER
SEAL
Special Tool Required
앫 Crankshaft Front Seal Installer J 37715-A
Installation
Refer to Figure 6-52.
1. To install the lip-type seal, use crankshaft
front seal installer J 37715-A. Position the
seal on the tool, with the solid portion of the
seal outward (toward the tool).
2. Position the tool over hub and into the seal
opening.
Figure 6-52 — Timing Gear Cover Seal Installation
3. Insert the hub capscrew into the hole in the
seal installation tool and draw the seal in
until the tool bottoms out on the face of the
crankshaft.
4. Remove the tool and check the seal to make
sure it has been evenly installed.
[221 GP] FUEL INJECTION
PUMP INSTALLATION
Refer to SETUP AND ADJUSTMENTS section
under Fuel Injection Fixed-Timing Procedures for
pump installation procedure.
[212 RH] CRANKSHAFT HUB
Inspection
Inspect the crankshaft hub for scoring and
condition of flange, threaded holes and keyway.
Replace the hub if the seal shows signs of wear.
Mack Trucks, Inc. does not recommend the use
of a service sleeve to repair the crankshaft hub
when there is hub damage. When there is
damage to the hub, replace it.
Installation
Refer to Figure 6-53.
1. Insert hub key in keyway of the crankshaft.
2. Using a suitable grease-type lubricant, coat
the working surface of the seal in
preparation for crankshaft hub installation.
Teflon-type seals do not require greasing the seal
working surface of the crankshaft hub.
3. Heat hub to approximately 250°F (121°C)
prior to installation.
4. Using heat-resistant gloves, align keyway in
the hub with key in the shaft.
When engine has flywheel timing, the crankshaft
hub will not have a keyway slot.
5. In a quick, even motion, push the hub onto
to the crankshaft.
6. Install hub washer and capscrew. Tighten
capscrew to 330 lb-ft (447 N폷m) using torque
wrench J 23775-01 or equivalent.
1. Timing gear cover seal
2. Seal installer J 37715-A
3. Timing gear cover
5-101.bk Page 45 Friday, March 17, 2006 11:05 AM