For an example of a
122SD and Coronado 132 Maintenance Manual
page, see
f020185
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B
F
D
A
08/13/2013
41−01 Driveline Inspection
1.
Park the vehicle on a flat, level surface, apply
the parking brakes, and chock the tires.
WARNING
Self−locking bearing−cup or bearing−strap cap−
screws must not be reused; replace the cap−
screws with new ones. Also, do not undertighten
or overtighten any bearing−cup or bearing−strap
capscrews. A loose or broken fastener at any
point in the driveline weakens the driveline con−
nection, which could cause serious vehicle dam−
age, or could result in a driveshaft separating
from the vehicle, possibly causing loss of vehicle
control that could result in serious personal injury
or death.
2.
Check the torque of the bearing−cup or bearing−
strap capscrews; see Table 1 for installed torque
values.
Remove and discard any loose capscrews. Do
not reuse any loosened self−locking capscrews;
they are designed for one−time installation only.
Replace all loosened and removed capscrews
with new ones. Tighten the new capscrews as
specified in Table 1.
F
or half
−round yokes with bearing straps
, tighten
the bearing−strap capscrews following the tight−
ening sequence shown in Fig. 1, in increments
of 20 lbf·ft (25 N·m) to the torque specifications
listed in Table 1.
Bearing Cap or Bearing Strap Capscrew Torque
Specifi cations
U−Joint Type
Torque: lbf·ft (N·m)
Half−Round Yokes with Bearing
Straps and 3/8−inch Capscrews
(see Fig. 2, Ref. 8)
45−60 (60−80)
Half−Round Yokes with Bearing
Straps and 1/2−inch Capscrews
(Fig. 2, Ref. 8)
130−135 (175−185)
Full−Round Yokes with Bearing
Cups (Fig. 3)
43 (58)
RPL Series U−Joints with
Bearing Cups (Fig. 4)
125 (169)
Table 1, Bearing Cap or Bearing Strap Capscrew
Torque Specifi cations
3.
Check the driveline yokes for cracks, and check
end−yokes for looseness; see Fig. 2.
Replace cracked yokes.
If any end−yoke can be moved in or out on its
shaft, or can be rocked on its shaft, disconnect
the driveshaft and U−joint from the yoke, then
check the drive component’s shaft seal for leak−
age or other visible damage that may have been
caused by the loose yoke. Replace the seal if
needed, then tighten the yoke nut. Refer to Sec−
tion 41.00, Specifi cations 400 of the
122SD
and Coronado Workshop Manual
for torque
specifications. If the yoke is still loose after tight−
ening the yoke nut, replace the end−yoke and
yoke nut.
Replace the prevailing torque locknut (end−yoke
nut) if it was removed for yoke replacement, seal
replacement, or any other reason.
4.
Check U−joint assemblies for wear by moving the
driveshaft up and down, and from side to side. If
any movement of the U−joint cross in the bear−
ings can be felt or seen, replace the U−joint as−
sembly.
5.
Check if the midship bearing and mounting are
loose or have deteriorated, by attempting to
move the driveshaft up and down, and from side
to side. If the bearing is loose on its shaft, or
rattles, replace it. If the bearing mount is loose
on the frame, tighten the mounting fasteners to
the proper torque value. See Section 41.00,
12/16/2008
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1
2
1
Tighten the capscrews in a counterclockwise sequence,
starting with either number 1 position.
Fig. 1, Tightening Sequence, Half−Round Yoke Bearing
Strap Capscrews
Driveline
41
122SD and Coronado 132 Maintenance Manual, January 2010
41/1
E
A. Maintenance Operation Number consists of the Group Number followed by the Sequence Number
B. Group Title
C. Group Number
D. Vehicle Names
E. Release Date
F.
Group Number/Page Number
Fig. 1, Example of a 122SD and Coronado 132 Maintenance Manual Page
Introduction
Page Description
122SD and Coronado 132 Maintenance Manual, September 2013
I–3
