3) Measure worm shaft starting torque from its
position in the straightforward state in 2),
using a spring balance and string as shown in
below figure.
String
I
Joint rubber
Spring balance (Use one with a maximum
measurement of around 5 kg (11lb.)
Fig. 18-21
Worm shaft (including
sector shaft) starting
torque (with torque
wrench)
Right-hand steering vehicle
7.5
-
13.0 kg-cm
(0.54
-
0.94 lb-ft)
6.0
-
10.0 kg-cm
(0.43
-
0.72 lb-ft)
Right-hand steering vehicle
Worm shaft (including
1.97
-
3.42 kg
sector shaft) starting
(4.34
-
7.53 lb)
torque (with spring
I----
balance)
-
-
If measured torque is not within the specifi-
cation, carry out adjustment with adjusting
bolt
@
to meet specification and check to
confirm it again.
4) If worm shaft starting torque is checked all
right, another check should be carried out on
worm shaft operating torque in its entire
operating range (turning the worm shaft all
the way to the right and left) as shown in
Fig. 18-21.
Right-hand steering vehicle
Worm shaft (including
Under 13.0 kg-cm
sector shaft) operating
(Under 0.94 lb-ft)
torque (with torque
Left-hand steering vehicle
wrench)
Under 12.0 kg-cm
(Under 0.86 lb-ft)
,
Right-hand steering vehicle
Worm shaft (including
Under 3.42 kg
sector shaft) operating
(Under 7.53 lb)
torque (with spring
l-----i
balance)
6.96lb)
If measured torque does not conform to
specification, readjust worm shaft starting
torque in straightforward state by means of
adjusting bolt
0,
and then recheck worm
shaft operating torque.
If the specified value is not attained even
after readjustment, it is advisable to replace
the gear box with a new gear box ass’y.
Fig. 18-22
18-10