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MAINTENANCE
Crusader
MC-8
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MANUAL
above
100
P.S.I. and raise the coach to the specified
height.
CAUTION: Always adjust on "fill cycle." If it is
necessary to lower coach height, release sufficient air
to be well below height and adjust to height on fill
cycle.
Refer to figures 12-4 and 12-5. NOTE: Ride height
should be rechecked after road testing.
When it is found that the coach is falling below the
correct level after being parked for a period of time,
the following procedure should be carried out.
Locate the suspension system height control valve
which is applicable to the side of the coach which is
low. One height control valve controls both front air
beams, the rear air beams are controlled by two
height control valve -
one left hand side and one
right hand side. Disconnect the air line (Inlet from
Air Tank).
·
Remove the
adapter assembly
(1)
and discard, refer Figure 12-SB.
Remove the two small filter screens located behind
the adapter assembly for cleaning (2), refer Figure
12-8B. Clean with solvent and air blast. Replace the
two small screens and install a new adapter
(1)
and
reconnect air line. Check height control valve for air
leaks.
LE XHAUST TUBE
Figure 12-8B: Height Control Valve
Dismounted
OVERTRAVEL LEVER CENTER
POSITION ADJUSTMENT
(1)
Clean the exterior of the height control valve.
(2) Remove delay piston snap ring retainer, cover.
and O-Ring from control valve assembly, then
drain off the silicone fluid.
(3) Remove exhaust fitting and exhaust screen from
valve.
(4) Referring to Figure 12-9, scribe a line 1-3/8 inch
from plug end of overtravel lever control body.
(5) Place valve assembly in vise as shown in Figure
12-9.
-----n;
MOUNT CONTROL
l . . ( ] '
VAL VE LEVEL
\-.·
~
__ :::-r~
Figure 12-9: Use of Dial Indicator
(6) If vacuum source is available. attach supply hose
to valve exhaust port using Sun Tester fitting Nc_i.
115-3 or equivalent. Do not apply vacuum at this
time.
• ·
1
(7) Attach air pressure supply ho_se to air m et port.
Do not apply pressure at this time.
(8) Locate dial indicator in position as shown in
Figure 12-9. Move overtravel lever to full air
exhaust position -
TOP OF DELAY PISTON
FLUSH WITH TOP OF BORE -
without over-
traveling (position "C" Figure
12-10).
Relo_cate
indicator push rod to just contact 1-3/8. mch
mark on control body and reset indicator cl
1
al to
zero at this point (position "C" Figure
12-10)
(9) Move overtravel lever to full air intake position
without overtraveling (position "A'' Figure
1_2-
10)
(delay piston at bottom of bore). Take
In-
dicator reading which may vary from
0.60"
to
0.190".
( I
0)
Repeat steps 8 and 9 above to recheck this
reading.
( 11)
Divide the total travel dimension by two (Exam-
ple:
0.170'"
2 equals
0.085).
the~i__move overtravel
lever back this amount
(0.08J·)
t()
the center
(position
'"B"
Figure
12-10)
IMPORTANT
Without disturbing lever center
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