Helio O Series Owner's Manual page 35

Bearing replacement chart
Brakes size Hub size Bearings
Inside
7" x 1 1/4" 5 studs
Outside
* If the dust cap is damaged or lost, it's important to clean the bearing
and completely change the grease.
Bearing adjustment and hub replacement
If the hub has been removed or bearing adjustment is required,
the following adjustment procedure must be followed:
1. After placing the hub (1), bearings (2), washers (3) and spindle
nut (4) back on the axle spindle in reverse order as detailed
in the previous section (page 10) on hub removal the hub
assembly slowly while
approximately 50 lbs/ft (12" wrench or pliers with full hand
force);
2. Then loosen the spindle nut to remove the torque (don't rotate
the hub);
3. Back the spindle nut out slightly until the first castellation lines
up with the cotter key hole and insert the cotter pin. Note that
you should never reuse the old cotter pin;
4. Bend over the cotter pin legs to secure the nut;
5. Nut should be free to move with only restraint being the cotter
pin (or locking tang);
6. Lubricate the gauge with 100g (1/4 of tube) of lubricant (GADUS
220 (#XHP222) or equivalent);
7. Install the dust cap.
34
Industry
part (cup Seal Dust cap*
and cone)
L44610
1789 (1") 1445
/ L44649
2267E 1446
L44610
(1" 1/16") (standard)
/ L44649
tightening the spindle nut
Electric brakes features
Electrically actuated brakes have several advantages over other
brake actuation systems:
1. They can be manually adjusted to provide the correct braking
capability for varying road and load conditions;
2. They can be modulated to provide more or less braking force,
this easing the brake load on the towing vehicle;
3. They have very little lag time from the moment the towing
vehicle's brakes are actuated until the trailer brakes are
actuated;
4. In an emergency situation, they can provide some braking
independently of the towing vehicle.
Electric brake adjustment
Brakes should be adjusted (1) after the first 300 km of operation
when the brake shoes and drums have ''seated'', (2) at 4500 km
intervals, (3) or as use and performance require. The brakes
should be adjusted in the following manner:
to
1. Jack up trailer and secure on adequate capacity jack stands. Fol-
low manufacturer recommendations for lifting and supporting
the unit. Check that the wheel and drum rotate freely;
2. Remove the adjusting hole cover from the adjusting slot on the
bottom of the brake backing plate;
3. With a screwdriver or standard adjusting tool, rotate the
starwheel of the adjuster assembly to expand the brake shoes.
Adjust the brake shoes out until the pressure of the linings
against the drum makes the wheel very difficult to turn;
4. Then rotate the starwheel in the opposite direction until the
wheel turns freely with a slight lining drag;
5. Replace the adjusting hole cover and lower the wheel to
the ground;
6. Repeat the above procedure on all brakes.