248 • Section 10 — Chassis Information Cayman 2006
Phasing is relatively simple on a two-joint set, be sure that the slip yoke lugs and the tube yoke lugs are in line.
The U-Joint working angle is the angle formed by the intersection of the drive shaft centerline and the
extended centerline of the shaft of any component to which the U-joint connects. Because the double oscillating
motion of a U-joint that connects angled shafts causes a fl uctuating speed difference between the shafts, the effect
created by the U-joint at one end of the shaft must cancel the effect created by the U-joint at the other end. This
is done by making U-joint working angles at both ends of the drive shaft approximately equal, with the U-joints
in phase. If the yoke lugs at both ends of the shaft are lying in the same plane (a plane which bi-sects the shaft
lengthwise), the U-joints will be in phase.
Any condition which allows excessive movement of a drive shaft will cause imbalance: loose end yoke nuts,
loose U-joint bearing cap retaining capscrews, worn U-joint trunnions, bearings and worn slip-joint splines.
Among the most common causes of U-joint and slip joint damage is lack of lubrication. To keep the
motorhome operating smoothly and economically, the drive shaft must be carefully checked and lubricated at
regular intervals.
Lubrication Maintenance
The slack adjuster and camshaft need to be lubricated periodically to ensure proper brake operation. Lubricate
every 10,000 miles or three months.
090336 modifi ed
090350c
Rear Drum Brake: Lubricate until new
grease appears at exit points. Use NLGI #2
Lithium Soap base grease.
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