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MAINTENANCE
Crusader
MC-8
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MANUAL
The groove of the cam is cut shallow, and
therefore, narrower in the mid-position range of stud
travel to provide close adjustment where the straight
ahead driving action usually takes place.
Adjust through mid-position to the high spot. Do
not adjust in an end position. Backlash in the end
positions is normal and not objectionable.
Turn gear I to 2 cam turns off mid-position. Push
and pull lever shaft endwise alternately to check for
excessive play in the adjusting stud assembly.
If
more
than .003" end play exists, proceed with adjustment
as follows:
Bre.ik stake of plug (C) to permit rotation in
retamt:r (D) .• End play may be none (zero) to .003".
Screw plug (C) clockwise to reduce end play of ad-
juster stud. Re-stake the flange of plug (C) to lock
plug to slot in retainer (D) and proceed with ad-
justment as described below:
Loosen lock nut (G ). Screw retainer (D) clockwise
into side cover until a slight drag is felt when turning
the taper studs through the high spot on the cam.
Back out (counter-clockwise) retainer (D) ap-
proximately 1 /16 turn to barely eliminate the slight
drag over the high spot. Turn cam from extreme left
turn to extreme right turn and reverse to check for
tight spots.
If
no tight spots exist, tighten lock nut (G)
tight. After adjustment is locked with lock nut, turn
gear through full travel (extreme left turn to extreme
right turn, or vice versa) to check adjustment.
After this adjustment, reconnect the gear at all
points loosened prior to making the adjustment. Also
check tightness of mounting flange bolts and nuts,
steering arm on lever shaft, and nut on the lever
shaft.
STUD
ROLLER
BEARING
UNITS:
The
foregoing adjustments will suffice in nearly every in-
stance, but in some cases it may be necessary to adjust
the stud roller bearing units in the lever shaft.
In order to make this adjustment the shaft must be
removed from the ·gear. The roller bearings should be
preloaded at all times. Adjust to a noticeable drag.
CAUTION: Use extra care in the following ad-
justment:
Factory adjustments on new units are set to
1
to 4
inch-pounds of torque to revolve stud. Used or
replacement units should also be set to the same
torque. Revolve stud several times before checking
torque.
NOTE: Operation of a correctly adjusted bearing
unit may feel rough to the hands but under steering
load it will be smooth. The preload will assure nor-
mal service life. The stud should be rotated several
full turns and reversed before checking rolling
torque.
Wash bearings in solvent and lubricate with oil
recommended for lubrication of gear. Should any
roller be damaged or lost, replace with a complete
new set. Do not make a partial replacement. Use a
new lockwasher. Tighten nut as required. (Hold stud
from turning by using spanner wrench on washer.)
Revolve stud several complete turns and reverse to
test adjustment.
Lock adjustment by bending over a lockwasher
prong that is at a right angle to a side of the nut. Do
not use the washer twice unless the prong used has
been removed.
VAL VE: (Centering) If steering leads to either
right or left, valve adjustment may be performed in
following manner:
1.
Loosen four capscrews mounting valve to gear
box.
2.
Allow valve to move on gear until centered bet-
ween springs, tighten capscrews carefully in-
suring that the valve does not move as bolts are
tightened.
3.
Jack front wheels off ground, start engine and run
at fast idle. Wheels should not move to eithei: left
or right if valve is centered correctly.
CAUTION: Before adjusting valve check steering
column to see if gear box slip joint is not applying
force on the worm shaft. If steering column is too
low, closing joint, coach will tend to lead right as
force will he applied in same manner as right turn. If
column is too high, joint will lift worm causing lead
to left as applied in left turn.
REMOVAL OF GEAR FROM
CHASSIS
Before removing the gear from coach, note the
hookup of hydraulic lines. Identify by tagging the
lines and noting the ports each 1s connected to.
CAUTION: Plug all ports and lines to keep out
dirt.
Remove the steering gear arm (49) from lever shaft
(14). Use an arm puller if possible. Do not hammer
the arm off without using a support against the end of
the shaft. Use light blows as they arc more effective.
Remove clamp bolt on lower universal to free gear
from steering column. Remove the flange bolts a_nd
remove the gear from the chassis. Clean the steenng
gear thoroughly but DO NOT STEAM CLEAN.
REMOVAL OF LEVER SHAFT: Remove the cap
screws holding the side cover ( I 7) to the housing
(I).
Remove the side cover and lever shaft as a unit. (En-
sure that the lever shaft has no burrs on the outer end
of the shaft that could cause damage to the housings,
bushings or oil seals).
REMOVAL OF CONTROL VALVE-TYPE Vl4:
Remove four screws holding control valve to ac-
tuator housing (25) and remove valve. Pull out ac-
tuator lever (30).
REMOVAL OF CAM: Remove the screws holding
lower cover (23) and actuator housing (25)
to
gear
housing (I). Unlock actuator retainer screw (26) and
remove the actuator housing.
Remove adjusting nut
(12)
after straightening bent
prong of lockwasher (II). Remove tongued spacer
washer ( I 0) and lower thrust washer and thrust
bearing (8,9).
Remove lower centering washer
(31)
from the end
of actuator ( 13) and remove the actuator taking care
not to lose springs (32) that are in the actuator.
Remove upper centering washer (31 ), upper thrust
washers and thrust bearing (8,9), spacer
(7),
and
gasket (28).
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