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21
T51002 E
InstallatIon, servIce and troubleshootIng Procedures
HUBCAP INSTAllATION
IMPORTANT:
Once installed,
DO NOT remove
hubcap
. To protect warranty on
Hendrickson dressed axles, skip
Technical Services before removing any
Hendrickson assembled wheel-end
components.
Three basic hubcap types, table below, are available.
Hubcap installation is the same for each (refer to
HUBCAP on page 11 for more hubcap options).
SPINDlE TyPE
HUBCAP
HN
HN
HP
HP
HP with castle nut system
HP extended
Table 4:
Basic hubcap types
3/8 in wrench
7/16 in torque wrench
Axle hose
fitting
Rotary union
Figure 19:
Hubcap to axle hose connection
To install the hubcap:
1. Draw just enough axle hose out from center of
spindle to
attach
axle hose fitting to the rotary
union inside the hubcap (Figure 19).
2.
Place
hubcap gasket over axle hose for later
positioning.
NOTE:
Shaft has pre-applied dry thread locker.
Loctite
®
or other thread locking compound is
not required.
3.
Hand thread
rotary union onto axle hose fitting.
DO NOT rotate axle hose fitting
.
4. Similarly to Figure 19, applying an inch-pound
torque wrench on the 7/16 inch flats on rotary
union shaft and 3/8 inch wrench on the flats
of the axle hose fitting,
tighten
connection to
50±5 in. lbs. (5.7±0.6 N•m).
NOTICE: for clocking of tire hose positioning,
before proceeding.
5.
Place
two opposing bolts in hubcap and
align
gasket to bolts.
6.
Orient
hubcap for best tire hose positioning
(Figure 22 on page 22) and
align
holes with
hub face threaded holes.
Hand-tighten
the two
bolts.
7.
Install
remaining four hubcap bolts and
hand-tighten
.
TIREMAAX
TIREMAAX
PRO
Figure 20:
6-bolt hubcap torque pattern
8.
Torque
hubcap bolts in the order shown in above
figure. Torque is 15±3 ft. lbs. (20.3±4.1 N•m).
Repeat
procedure for each wheel end.
NOTE:
If oil lubricated wheel-end,
oil can be
added after hubcap is installed
and
before installing tire hoses. For details on
wheel-end lubrication, refer to L496 or OE
documentation.
The
oil-fill plug comes loosely installed
from
the factory in the hubcap port. This plug must
be tightened to prevent wheel end lubricant
from leaking out of the hub.
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2
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4
5
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