Terex TS14G, Maintenance Manual

Page: 85 / 376

Section 140-0060
7
SM 1778 3-99
Front Axle - Differential
noticable drag or preload on the pinion bearings when
yoke nut (32) is tightened to the torque specified.
Note:
The preload should be held within a torque
range of 2 -4 Nm (15 - 35 lbf in), lubricated.
11. To check pre-load torque, place pinion gear (28)
in a soft-jawed vice, yoke (33) up. Wrap several
turns of soft wire around body of cage (39) and form
a small loop at the free end. Insert the hook of a
suitable spring scale into the wire loop and pull on a
line tangent to the outer flange face. Refer to Fig. 10.
The scale reading should be taken while cage (39) is
being rotated. The starting torque may be higher and
therefore misleading, depending upon the tightness of
the bearings.
The pull in Newtons (lbf) as indicated by the scale,
multiplied by the cage body radius in metres (inches)
(measured at the point where wire was wrapped)
equals the Newton metres - Nm (lbf in) of torque.
For example: if the cage body radius is 0.103 18 m
(4.0625 in) and the scale pull registered 40.03 N
(9 lbf), then 0.103 18 x 40.03 = 4.13 Nm
(4.0625 x 9 = 36.5625 lbf in) torque. This is 0.18 Nm
(1.56 lbf in) over the high limit. The bearing preload
would be too great.
Fig. 10 - Checking Bearing Preload
SM - 2180
If the preload is too much, use a combination of two
washers (31) that is thicker. If the preload is not
enough, use a combination of two washers that is
thinner.
Continue checking the preload and changing washers
as required until the proper fit of 2 - 4 Nm (15 - 35 lbf
in) is obtained, with the bearings and washers under
the full torque specified for nut (32).
12. Remove nut (32) and remove yoke (33) from
pinion gear (28). If any difficulty is experienced
removing the yoke use a suitable puller, DO NOT
hammer the yoke.
13. Install seal (34) into bearing cage (39).
14. Install yoke (33) on pinion gear (28) shaft.
15. Install nut (32) on pinion gear (28) and torque
tighten nut to 1 140 - 1 380 Nm (840 - 1 020 lbf ft).
16. Remove wire from shim (40) pack and set shims
in place against flange of bearing cage (39).
17. Position bearing cage (39) and pinion gear (28)
assembly to carrier housing (26) assembly and
secure with bolts (37) and lockwashers (38). Torque
tighten to 230 - 260 Nm (170 - 190 lbf ft).
Fig. 9 - Installing Yoke
SM - 2179
Courtesy of Machine.Market