Description
Freightliner Heavy-Duty Trucks Factory Service Repair Manual
Installation
1. Check all of the front and rear engine support components for damage and extreme wear. Replace the components as needed.
2. Install the isolator tubes and the top isolators in the engine front cross member. Coat the rubber mounts with soapy water, and install them in the rear engine mounts.
PRECAUTION:
Don’t lubricate the components with oil, grease, or silicone lubricants, because they will soften the rubber and damage the mounts.
3. Attach the lifting device to the engine lifting eyes. Attach the A-frame or overhead crane to the lifting device.
4. Lift the engine and transmission high enough to clear the chassis. Lower the engine and transmission into position on the front and rear engine-support mounts. Freightliner Heavy-Duty Trucks Factory
5. Using a floor jack, raise the transmission high enough to allow insertion and alignment of the rear engine-support upper isolators and bearing washers. Support the transmission on a safety stand, just in front of or just behind the floor jack.
Install and align the upper isolators and bearing washers, and install the rear engine-support bolts. Remove the safety stand, lower the transmission, and remove the floor jack.
Freightliner Heavy-Duty Trucks Factory Service Repair Manual
6. Position the cab-mount (over slung) cross-member against the back of the frame-mounted cab support brackets. Using new bolts, install the longer attachment bolts with washers in the upper holes, and the shorter bolts with washers in the lower holes. Install new nuts, and progressively tighten them to 70 lbf·ft (95 N·m).
7. Install the lower, rear engine-support isolators, lower bearing washers, and locknuts on the bottom of the rear engine-support bolts. Tighten the locknuts 160 lbf·ft (217 N·m).
8. Position the bearing washers on the front engine support bolts. Install the bolts upward through the front engine-support bracket and the engine front cross member. Install the flanged locknuts; progressively tighten the locknuts to 210 lbf·ft (285 N·m).
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