Triumph TR4A - Front Hub Lubrication and Adjustment

ROUTINE
SERVICING
and
sDrins. Clean
the components
by
swillinA $em
in melhy-
lated ipiriis
(denatured
alcohbl).
Ensure that the
breather pipes
are clean
and serviceable.
Reverse
the dismantling
sequence
to
re-assemble.
NOTE.
When the
breather valve
is cleaned,
remove the oil
filler
cap and check
thal
the
breather
hole
(arrowed.
Fig. 27) is
unobstrucled
and
that the
joint
washer
is
serviceable.
Front Hub
Lubrication
and Adiustment
Check
and
if necessary adjust
the front hubs every
1 2,000
miles
If the
car is
being used for competition
work, re-Pack
the
front
hubs
with greaie every
12,000 hiles.
This period-
may be
extended
to 24,000
miles for normal
use.
To pack
the
hubs
wilh
grease
:-
Jack uD
the front of the car
and remove one
front road
wheel.
Without
disturbing the hydraulic
PiPe
unions,
unscrew
two bolts
securing
the calipei
to a plate screwed
to the
vertical link and
lift
the caliDer
from the disc, tving
it to a convenient
point
to
prevent
ir
hanging
by the attacbed
hidraulic pipe.
Note the
number of
shims
fltted
between the caliper
and vertical
link.
When wire-spoked
wheels are
fitted, remove
the splined
hub
extensions
by detaching the
nuts shown on
Fig. 28.
Remove
the hub grease
cap, withdraw
the sPlit
Pin
and remove
the slotted
nut and'1D" washer.
Detach the
hub assembly
and
outer
race
from the stub
axle. Wash all
trace of grease
from
the
hub
and bearings.
Pack the
hub and bearings
with new grease,
working
it well into
the rollels.
24
Re-assemble
th€ hub and
r.aces to the
stub ade, securing
theu
with the "D"
washer and
slotted
nut. SPin
the hub and tighter
the nut until
resistance
is felt
to hub
rotation, then
slacken of th(
nut one
half flat and
fit a new
split
Pin.
Re-assemble
the brakr
caliper
unit to
the vertical
link,
refitting any
shims
remove<
dudng
dismantling.
Re-assemble
the sPlined
hub extension
(i
fitted).
Reflt
the road whe€l
and
lower the
jack.
Se€
"Warning'
on page 32.
Repeat
the above
operations
with
the oPposite
wheel hub