Hendrickson HXL5 - Installing Precision Spindle Nut System

12
T72007 A
HXL5
®
HUB MAINTENANCE PROCEDURES
INSTALLING PRECISION SPINDLE NUT
SYSTEM
Available precision spindle nut systems for HXL5
®
include:
SPINDLE NUT SYSTEM TOOLS
HN PRECISION240
®
3
13
/
16
inch socket
5
/
32
inch hex key
HP PRECISION320
®
4
7
/
8
inch socket
3
/
16
inch hex key
Installation procedures are the same, but part and
tool sizes (Table 2 on page6 and above table)
are different due to the difference in spindle thread
diameters�
NOTICE: Failure to exactly follow the steps of
this procedure could cause improper
bearing seating, resulting in reduced
bearing life.
HP spindle shown
Cap
screw
(2)
Spindle
keyway
slot
Interlock
washer
PRECISION240
®
or
PRECISION320
®
spindle nut
Tang
Figure 11: Precision spindle nut system components
WARNING: FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD CAUSE WHEEL
TO COME OFF AND CAUSE BODILY
INJURY.
OVER-TIGHTENING NUT COULD
CAUSE BEARINGS TO RUN HOT AND
BE DAMAGED.
1� Install precision spindle nut (Figure 11) onto the
spindle, toothed side out, and hand-tighten�
2� Simultaneously rotate hub clockwise at least three
revolutions, while using a torque wrench to tighten
precision spindle nut to 200ft�lbs� (271Nm) of
torque�
3� Back off precision spindle nut 1 revolution�
4� Rotate hub clockwise at least one full revolution�
5� Tighten precision spindle nut to 50ft�lbs� (68Nm)
of torque�
6� Rotate hub clockwise three full revolutions�
7� Repeat Step5 and Step6 three more times�
IMPORTANT: DO NOT rotate the hub at this point�
Rotating the hub before installing
the interlock washer can dislodge
the precision spindle nut and cause
improper bearing seating�
60°
Figure 12: Back off nut
1
/
6
turn
8� Back-off nut
1
/
6
turn (Figure 12, one hubcap screw
hole)�
Spindle keyway slot
Fully
engaged
teeth
Tang
Interlock
washer
Cap
screw (2)
PRECISION240
®
or
PRECISION320
®
spindle nut
Figure 13: Interlock washer and precision spindle nut fully engaged
9� Install interlock washer into the precision spindle
nut with the tang aligned and inserted in the
spindle keyway as shown in Figure 13�