Hendrickson HXL5, Maintenance Procedures

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�