Engine Mounts 01.01 Rear Engine Mount Replacement Replacement For MBE4000 engines: tighten the bolts 175 lbf·ft (237 N·m). 1. Apply the parking brakes, chock the tires, and (if applicable) drain the air brake system. 6. Inspect the engine mount rubber isolators for wear or damage and replace them if necessary. WARNING CAUTION The jack used to lift the engine must be capable of safely lifting and supporting two metric tons. Once the engine mount is disconnected, do not get under the engine until it is securely sup- ported on engine stands. An unsecured engine may fall, causing personal injury or death, and component damage.
Do not lubricate the components with oil, grease, or silicone lubricants; they will deteriorate the rubber isolators. 7. Install the upper isolator in the engine mount. If applicable, place the snubber on the isolator. 2. Disconnect the right rear engine mount from the right rear frame mount. WARNING The jack used to lower the engine must be ca- pable of safely lifting and supporting two metric tons. Once the engine is removed from the en- gine stands, do not get under the engine until it is securely installed on the engine mount. An un- secured engine may fall, causing personal injury or death, and component damage.
2.1 Place a jack under the rear of the engine and raise the jack until it’s braced against the engine. 2.2 Remove the bolt from the right rear en- gine mount. Save the fasteners, rubber isolator cushions, and snubbers. 8. Secure the engine to the frame mount. 2.3 Lift the engine slightly to take its weight off the right rear engine mount. Place en- gine stands under the engine to keep it off the engine mount. 8.1 If not in place, set a jack under the rear of the engine and raise the jack until it is braced against the engine. 3. Remove the bolts that secure the mount to the frame rail. Remove the mount from the frame rail. 8.2 Lift the engine slightly to remove the en- gine stands.
Remove the stands, and carefully lower the engine onto the engine mount. If necessary, remove the four bolts that secure the right engine leg to the flywheel housing, and remove the engine leg. 8.3 Holding the lower isolator and snubber in place, install the bolt in the right rear en- gine mount, and secure it with the nut and hardened washer. Tighten the nut 241 lbf·ft (327 N·m). 4. Place a new engine mount against the inside of the frame rail, and secure it with bolts, washers, and nuts. Tighten the nuts 45 lbf·ft (61 N·m). 5. If removed, install the engine leg on the right side of the flywheel housing.
Apply thread lock compound to the bracket mounting bolts and tighten the bolts as follows: WARNING The jack used to lift the engine must be capable of safely lifting and supporting two metric tons. Once the engine mount is disconnected, do not get under the engine until it is securely sup- ported on engine stands. An unsecured engine may fall, causing personal injury or death, and component damage. For Caterpillar 3126 and C-7 engines: tighten the bolts 100 lbf·ft (136 N·m). For Caterpillar C-9, C-10 and C-12 engines: tighten the bolts 190 lbf·ft (258 N·m). For MBE900 engines: tighten the bolts 92 lbf·ft (125 N·m). 9. Disconnect the left rear engine mount from the left rear frame mount.
Business Class M2 Workshop Manual, Supplement 5, September 2003 100/1