Hendrickson HXL5 - Checking End Play; Checking for Seal Leaks; Checking for Smooth Rotation

7
T72007 A
HXL5
®
HUB MAINTENANCE PROCEDURES
CHECKING FOR SEAL LEAKS
The HXL5 hub assembly is lled with Chevron Delo®
Synthetic Grease SF at the factory during the
manufacturing process� The grease is contained in the
hub by the hub seal where leakage can occur (Figure 1
on page5)�
Figure 2: Check back side of hub for grease seal leak
To check for leaks, look at the inboard side of the hub,
(Figure 2)� A small amount of grease may be visible at
the hub seal� This is a normal occurrence and does
not necessarily indicate a seal leak� Wipe clean�
Hub seal
Spindle seal
journal
Hubcap
gasket
Outboard
side
Inboard
side
Figure 3: Areas where leaks may occur
A small amount of grease may also appear at the
spindle bearing shoulder to hub joint (Figure 3) This
is also normal and does not necessarily indicate a
seal leak� It should be wiped clean to minimize any
accumulation of dirt�
NOTICE: Pressure or steam washing should be
avoided in this area as water could
be forced past the seal and degrade
lubricant performance and corrode
bearings.
If the hub seal is leaking, a large quantity of grease will
be present in the areas of the hub, spindle hubcap and
wheel� If you see this condition, refer to CONTACTING
HENDRICKSON Technical Services for guidance on how
to proceed�
CHECKING FOR SMOOTH ROTATION
Many factors can effect smoothness of rotation� Primary
causes include:
• Bearing wear
• Damaged hub seal
• Debris
NOTE: A reasonable assessment can be performed
without removing tires and rims� However, this
procedure is best performed with hub only as
shown in Figure 5 on page8�
1� Ensure trailer is secure per PREPARING TRAILER FOR
SERVICE on page5�
2� Disengage brakes and remove brake drum
(recommended)�
3� While maintaining physical contact, slowly rotate
hub in both directions at least ve revolutions�
4� During rotation, ensure smooth and quiet rotation�
The bearings should move smoothly� Feel for any
resistance in movement� Any debris in bearings
should be felt as it moves over rollers in bearings�
IMPORTANT: If bearings feel rough, sound noisy or
DO NOT rotate freely, DO NOT place the
suspension back into service� Refer to
CONTACTING HENDRICKSON Technical
Services for guidance�
CHECKING END PLAY
This procedure must be performed:
• After CONTACTING HENDRICKSON Technical Services,
before removing the hubcap (as stated on hubcap
label), for guidance relative to suspected wheel end
play movement�
• As part of INSPECTING HUB INSTALLATION on
page13�
1� If not already done so:
A� Perform PREPARING TRAILER FOR SERVICE on
page5�
B� Remove wheel (tires and rims)�
C� Disengage brakes�
D� If drum brake, remove drum (recommended)�
If ADB, remove brake pads per manufacturer’s
recommended procedures�
E� Remove hubcap and discard gasket�