MCi Crusader II 1989 Maintenance Manual page 305

Date
1-1-89 Page __
8 _- 7 _ _ _
MC-9 MAINTENANCE MANUAL
14. Start the engine and check for normal operation.
15. Stop the engine and install a new locking wire. This
completes the procedure.
FAST I OLE OVERRULE AND ENGINE
SHUT-DOWN VALVES AND CYLINDERS
REMOVAL AND DISASSEMBLY
CAUTION: When removing air lines, loosen
connections slowly to vent air pressure.
1. Disconnect air pressure lines from valves and cylinders.
2. Remove quick-disconnect plug from valves.
3. Remove stud nuts retaining valves to mounting bracket
4. Remove screws retaining cylinder to governor cover.
5. Remove cap from piston rod.
6. Pull piston and rod assembly out of cylinder.
7. Reverse for assembly.
INSTALLATION
1. Mount valves and air cylinders as shown in figure 8-12.
2. Install bell cranks and adjust to have 1 /32" (.79 mm)
clearance with piston extended.
3. Install air supply lines. quick disconnect plugs, ground
· terminals and clip to left-hand cylinder head.
________
,.,,_
'
FAST IDLE OVERRULE
1
AIR CYLINDER
Figure 8-12. Engine Control System.
SENDING UNIT MANIFOLD
The sending unit manifold is mounted in the engine com-
partment upper frame to provide additional protection to send-
ing units.
Figure 8-13 shows the manifold with the 3 lb. oil tell-tale
sending unit, oil pressure gauge sending unit and the manual
oil pressure gauge.
I
SENUING UNIT MANIFOLD
Figure 8-13. Sending Unit Manifold.
COLD WEATHER ETHER START SYSTEM
DESCRIPTION
Cold weather starting is facilitated by the injection of
ether into the engine. Ether travels through a line from the
ether solenoid valve to an atomizer which is installed in the
engine blower housing. A replaceable ether bottle is con-
nected to the solenoid valve.
OPERATION
The coach must be in the start mode (main switch
"ON'1
and the ether switch at the driver's instrument panel must be
depressed before the ether injection process will occur. The
ether start switch is wired to the starting circuit and becomes
inoperative after the engine is running and fuel pressure
reaches 9 p.s.i., preventing ether injection during normal
engine operation. Additionally, the ether system thermostat,
which is surface mounted at the water pump housing, must
be sensing a temperature of 60° +6°F before the solenoid
valve will open and allow ether to flow to the engine. Refer to
the wiring diagram for the ether start system in Section 7 of
this manual.
- Figure 8-14. Pressurized Ether Starting System.