Spicer Driveline Installation Service Manual - Manual (Page 20)

17
Installation Techniques
If there is more than one driveshaft between the device and the rear axle, install the driveshaft as outlined earlier with a 1 to
1-1/2 degree universal joint operating angle on the input end of each shaft. Then rotate the axle so it is on the same angle as the
last fixed shaft. The universal joint operating angle on each end of the last shaft will automatically be equal. (See Fig. 14)
Mounting a Remote-Driven Pump, Blower, or Similar Device
Remote mounted-pumps, blowers, or similar devices are usually driven by a side, top, or bottom-mounted PTO and use an aux-
iliary driveshaft.
Many times these devices are mounted to the vehicle frame or cross member. The usual method of mounting, where the driven
device is mounted parallel with the ground without regard to the mounted angle of the PTO, will produce a vibration that may cause
failure of the PTO, pump, blower, or other driven device.
Any remote driven device must be mounted parallel and in line, if possible, with the PTO.
To select the appropriate auxiliary driveshaft for these types of applications, you should consider proper torque, safe operating
speed (which is different than the critical speed for tubular driveshafts), and angularity. (See Maximum Safe Operating Speed Chart
on page 18).
An auxiliary driveshaft must be capable of transmitting the maximum torque and RPM required by the driven equipment. For most
low-torque applications operating at less than 1200 RPM, solid bar-stock constructed driveshafts are adequate. For applications
requiring additional torque or RPMs, tubular shafts should be fabricated.
Figure 14
Install at same angle
and in-line in top view
1 to 1-1/2 angle minimum
o o
Mount on same angle
rotate axle if necessary
Check these angles.
3 recommended
o
1/2 0 minimum
1 0 to 1-1/2 0 recommended
3 0 maximum
Equal within 1/2 0