Unimog U500, Инструкция по монтажу

Страница: 186 / 292

Body and Implement Mounting Guidelines U500 North America Mechanical drive of implements
August 2005 Page 189 of
294
5.11 Drive shafts for implements
5.11.1 General information on drive shafts
Drive shafts must be positioned in such a way to avoid uneven
rotation, misalignment and vibration in all implement-operating
positions.
The torque capacity and ease of movement of the sliding
parts (slip yoke), even during maximum torque transfer,
must be considered
. Ball track profiles should be used in the
case of high torque. The direction of rotation in the vehi-
cle/implement combination must be considered.
Caution: Risk of accident and serious injury!
The implement/body manufacturer must pro-
vide safeguards against rotating parts in the
vicinity of the drive shaft connection to the
vehicle. Drive shafts that are located in areas
in which personnel pass or work must be en-
cased or covered. Failure to do so can cause
property damage, personnel injury or death.
Installing of drive shafts
Pay attention to the installation guidelines of the drive shaft
manufacturers. If the application makes it necessary, use sev-
eral drive shafts with intermediate bearings. The flange sur-
faces must be completely flush. The joint shaft angle must be
the same at both ends of the shaft (
β
1
=
β
2
) and must not be
larger than 15
°
(except for N08 the drive shaft between the
PTO shaft and the front implement. Refer to section 5.9 for
details). Angle
β
must also be not smaller than 1
°
.
Relevant vehicle safety components (e.g. brake, hydraulic and
fuel lines) must be routed and protected in such a way that
they cannot get damaged in the event of a drive shaft failure.
At continuous operation the temperature at joints, splines and
bearings shall not exceed 176
°
F / 80
°
C in order to avoid dam-
ages to the plastic coating of the spline, (slip yoke) and also to
avoid leakage of grease from the universal-joints. It could be
necessary to install heat shields.
The splined portion of the shafts must not be painted. Drive
shafts must be balanced before they are installed. Existing
balancing weights must not be removed. The installation ar-
rangement in the vehicle must be identical to that used on the
balancing machine. The phasing of yokes on the splines must
not be changed. The specified grade of fasteners and the
tightening torque must be adhered to. The tightening of the
bolts must by happen cross-wise. Shaft assemblies with center
bearings must first be attached to the in- and output flange /
yoke / spline. Thereafter the intermediate (center) bearing can
be installed properly aligned and tension-free with consoles on
the chassis frame.
Correct design and installation of the drive shaft (length, tube
diameter, speed, etc.) prevents premature failure, damage,
noise and vibrations.
Fig. 5.24: Drive shaft, length compensation