Drag Link; Center Link; Steering Spindles; Control Arm Bushings - Holiday Rambler Imperial 2008 Owner's Manual

CHASSIS INFORMATION — 10

Drag Link

The drag link connects the steering box
pitman arm to the steer axle. The movable joint
(ball joint) uses sealed boots to prevent water
intrusion. DO NOT rupture the boot when
applying grease. Grease interval is six months or
every 5,000 miles.
NOTE:
It will be necessary to start the
motorhome and turn the steering wheel
to access fitting(s).

Center Link

The center link is located on the backside of
the steer axle. The center link attaches the two
wheels together causing the right front to track
with the left front. Greasing interval is every six
months or 5,000 miles.
226

Steering Spindles

The steering spindles attach to the front
axle and pivot on the kingpin. The wheel end
assembly and brake system attach to the spindle.
There are upper and lower lubrication points
for the kingpin. The drag link attaches to the
roadside spindle. After initially lubricating
the roadside and curbside kingpins, rotate the
steering assembly lock to lock (full left to right)
then move assembly back to center. This purges
any remaining air pockets. Continue lubricating
the kingpins until new grease purges with no air
pockets. Greasing interval is every six months
or 5,000 miles.
090353c

Control Arm Bushings

Control arms align the axles perpendicular
with the frame. The panhard bar controls side
to side motion of the axles in the frame. Control
arm bushings and panhard bar bushings do not
090354b
require lubrication.
2 00 8 I MP E R I A L

STEERING GEAR

Maintain the grease pack behind the output
shaft's dirt and water seal as a general
maintenance procedure at least twice a year.
The grease fi tting is provided in the housing
trunnion. Use NLGI grade 2 multipurpose
chassis lube and use only a hand operated grease
gun on the fi tting. Add grease until it begins to
extrude past the sector shaft dirt and water seal.
Upper
Lubrication
Points
Steering Box - Back
Power steering is provided by using hydraulic
pressure to assist rotating the output shaft of
the steering gear. Located at the end of the
Lower
Lubrication
input shaft of the steering gear is poppet valve
Points
090414
and worm drive. The poppet valve directs the
hydraulic fl uid pressure to a type of spool.
The worm drive threads in the center of the
spool. When in the center position, pressurized
hydraulic fl uid bypasses the spool. When a turn
is made, the poppet valve shifts to one direction
or the other, directing the hydraulic pressure
to one side of the spool depending on turning
direction. The hydraulic fl uid is then cooled
before returning to the reservoir.
090403b
Zerk Fitting:
Located under
dust cap.