Holiday Neptune 2004, Руководство пользователя

Страница: 373 / 416

CHASSIS INFORMATION --- SECTION 10 • 373
NEPTUNE 2004
10
Correct U-joint working angles U-joint phasing, and driveline balance is vital to
maintaining a quiet-running drivetrain and long life of drivetrain components
(including driveline 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
driveshaft 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 fluctuating 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 driveshaft 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
driveline 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
driveline must be carefully checked and lubricated at regular intervals.
U-Joint Angles,
Phasing & Driveline
Balance
090336 mod
090337
Slip Yoke Tube Yoke