10 • 391
CHASSIS INFORMATION
DIPLOMAT 2004
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 bisects the shaft lengthwise), the U-joints will be in phase.
Any condition which allows excessive movement of a driveshaft 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.
090336
090337
Slip Yoke
Tube Yoke
U-Joint Angles
Phasing &
Driveline Balance
Summary of Contents for DIPLOMAT 2004
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Page 88: ...DIPLOMAT 2004 2 88 DRIVING SAFETY Weight Label...
Page 92: ...DIPLOMAT 2004 2 92 DRIVING SAFETY...
Page 95: ...2 95 DRIVING SAFETY DIPLOMAT 2004 020254...
Page 97: ...2 97 DRIVING SAFETY DIPLOMAT 2004 020255b...
Page 98: ...DIPLOMAT 2004 2 98 DRIVING SAFETY...
Page 99: ...2 99 DRIVING SAFETY DIPLOMAT 2004 VIEWS Front Rear 010770 010771...
Page 100: ...DIPLOMAT 2004 2 100 DRIVING SAFETY Roadside Curbside 010769 010768...
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Page 325: ...8 325 ELECTRICAL SYSTEMS HOUSE DIPLOMAT 2004 060191B Electrical Layout...
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Page 432: ...DIPLOMAT 2004 10 432 CHASSIS INFORMATION...
Page 434: ...DIPLOMAT 2004 10 434 CHASSIS INFORMATION Lubrication Service Record...
Page 435: ...10 435 CHASSIS INFORMATION DIPLOMAT 2004 Battery and Tire Record...
Page 437: ...INDEX Diplomat...
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