MCi Crusader II 1989 Maintenance Manual page 389

Date
1-1-89
Page. ___
12 _- 9 _ _
MC-9 MAINTENANCE MANUAL
3. To adjust air exhaust valve lever gap, install valve cover
on the valve using a new gasket and four attaching screws. Be
careful not to disturb indicator setting.
4. Disconnect air supply from the air inlet port and connect it
to the air springs
port
5. Move overtravel lever slowly to open exhaust port while
observing the indicator dial. Air should start to escape from the
exhaust port when indicator registers 0.035-0.037"
(.889-.940 mm).
6. If adjustment is necessary, shut off air pressure supply
and remove valve cover. Bend exhaust valve lever to correct
setting. Then install cover and re-check valve opening
dimension.
TIME DELAY CHECK
After adjusting valve gaps check time-delay for opening and
closing of valves (1-6 seconds one valve to opening of the other
is recommended). Valves should close from full-open position
within one second.
1. Place new O-ring over delay plug and install plug. Tighten
to 20-30 inch-pO!Jnds (2.2-3.4 Nm) torque.
2. Pour 5.5 CC + 0.25 CC of Silicone fluid (750 centistokes
Viscosity at 25"C) into delay piston chamber. With valve body
tilted slightly as shown in Figure 12-12 carefully operate over-
travel lever fore and aft to vent air from fluid. When all. air has
11een expelled from piston pin cavity. check fluid level using
!pth gauge as shown in Figure 12-13.
NOTE: Uae only No. S F96-1000 centl-
atokea L-HF22 40 Iba. (5 gal.).
3. With valve assembly level take measurement from center
of bore only. Add or remove fluid to bring fluid 13/64" (5.1 mm)
from top of valve body. An eyedropper will serve this purpose.
4. Place new delay piston cover O-ring in groove of valve
body. Install cover with retaining ring.
5. Place valve assef'!lbly vertically in holding vise. Refer to
Figure 12-14.
6. Move overtravel lever up and down for approximately one
minute.
AIR INTAKE TIME DELAY CHECK
1. Connect pressure line to valve intake port (figure 12-15)
and open air pressure to 95 psi (655 kPa).
2. Move the overtravet lever upward quickly approximately
2" (50.8 mm) and simultaneously start counting the number of
seconds before air starts to escape from the bellows
ports.
A
delay of 1 -6 seconds should exist. Repeat this check.
AIR EXHAUST
TIME
DELAY CHECK
To time the delay for exhaust. two methods can b~ used: one
'ing vacuum source and one using air pressure. If vacuum
.urce is available, perfotm steps 1 thru 3. If not. proceed to
'.eps 4 thru 6. ·
Method Using Vacuum:
1. Install cover plate on height control valve using gasket.
2. Connect pressure line to air exhaust port and open air
pressure to 95 psi (655 kPa).
AIR BUBBLE
ACTUATE
OVERTRAVEL
LEVER
Figure 12-12. Venting Air From Silicone Fluid.
0-Ring ~•
L-'7.-r----------,.,....-t-'-,-1
l' " ' '
I
!_ _ - - - - - - - - - - - • _,
REAR
Body
S/64" = 1.9mm
1/8"
=
3.1 mm
13/64"
=
5.1 mm
Figure 12-13. Measuring Silicone Fluid Level.
Overtravel Lever
Vacuum
Une
AJrUne /
and ,
Fittin9 ,
Vin
I-
\
\
Figure 1.2-14. Valve Position for Time Delay Check.