Power transmissionGeneral repair instructions
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| When installing a new rear final drive unit, check the oil level in the final drive and top up if necessary → Chapter. |
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| When installing mounting brackets as well as other waxed components, the contact surfaces must be cleaned. The contact surfaces must be free of wax and grease. |
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| Thoroughly clean all joints and connections and the surrounding areas before dismantling. |
| Environmental and waste disposal regulations for oil |
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| Gear oil and any other type of oil must be handled with care. |
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| Dispose of drained oil properly. |
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| Always adhere to statutory environmental and waste disposal regulations. |
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| Observe the information shown on the packaging of the oil. |
| O-rings, oil seals and gaskets |
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| Always renew O-rings, oil seals and gaskets. |
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| After removing gaskets and seals, always inspect the contact surface on the housing or shaft for burrs resulting from removal or for other signs of damage. |
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| Thoroughly clean housing joint surfaces before assembling. |
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| Before installing oil seals, lightly oil the outer circumference of the seal and fill the space between the sealing lips -arrow- about half full with grease -G 052 128 A1-. |
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| The open side of the oil seal should face the side containing the fluid. |
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| Lightly lubricate O-rings before installation to prevent them from being trapped and damaged during assembly. |
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| After renewing gaskets and oil seals, check and, if necessary, top up oil level in final drive → Chapter. |
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| Do not over-stretch circlips. |
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| Always renew circlips which have been damaged or over-stretched. |
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| Circlips must be properly seated in the base of the groove. |
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| Renew spring pins. Position: the slit -A- should be in line with the line of force -arrow-. |
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| Nuts and bolts for securing covers and housings must be slackened and tightened in diagonal sequence. |
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| Loosen and tighten particularly sensitive parts in diagonal sequence and in stages, taking care to keep them straight. |
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| The tightening torques stated apply to non-oiled nuts and bolts. |
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| Always renew self-locking bolts and nuts. |
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| Clean the threads of bolts which are secured with locking fluid using a wire brush (does not apply to propshaft bolts: these must be renewed). Then apply locking fluid -AMV 185 101 A1- to bolt threads before installing. |
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| Threaded holes which take self-locking bolts or bolts coated with locking fluid must be cleaned (using a tap or similar). Otherwise there is a danger of the bolts shearing off the next time they are removed. |
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04 Transmission
