Monaco DYNASTY 2006, Руководство пользователя

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DYNASTY 2006 CHASSIS INFORMATION — SECTION 10 • 329
U-Joint Angles, Phasing & Drive Shaft Balance
Correct U-joint working angles, U-joint phasing, and drive shaft balance is vital to maintaining a quiet running
drivetrain and long life of drivetrain components (including drive shaft components).
When in phase, the slip yoke lugs (ears) and tube yoke lugs
(ears) are in line. Normally this is the ideal condition and gives
the smoothest running shaft. There may be an alignment arrow
stamped on the slip yoke and on the tube shaft to assure proper
phasing when assembling these components. If there are no
alignment marks, they should be added before disassembly of
the shaft to assure proper reassembly.
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 bisects 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.
TAG AXLE
The switch for the tag axle is located on the roadside switch panel. Two lights are located on the switch: The
tag axle icon will illuminate with the park lights. The lower bar light will illuminate when the tag axle switch is
on and the transmission is in neutral, reverse or fi rst gear. When the transmission is in second through sixth gear
and the tag axle is lowered, the light will be off. Raise the tag axle when performing severe or tight maneuvering
under 5 mph to prevent scuffi ng the tag axle tires. A beeping alarm sounds when the switch is on.
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