Arctic Cat M 8000, Service Manual

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133
Oil-Injection Pump
(4000/8000)
REMOVING

NOTE: To service the oil-injection pump, the
exhaust system and the air silencer must be removed
(see the Engine-Related Items section).
1. Remove the throttle bodies and secure them out of
the way in an upright position.
2. Disconnect the oil-supply hose from the pump and
plug to prevent oil drainage.
3. Remove the oil-delivery hoses from the adapter
plates/intake flanges.
4. Disconnect the oil-injection cable/control rod.
5. Remove the two screws securing the oil-injection
pump and retainer to the crankcase; then pull the
oil-injection pump away from the retainer/crankcase
and account for a gasket/O-ring.
 NOTE: Remove the oil-injection pump from the
crankcase only if the O-ring or gasket need to be
replaced.
6. Turn the pump sideways; then remove the lower
union bolt (4). Account for two washer gaskets (1)
(3). Remove the pump.
731-551A
7. Remove the remaining union bolts securing the
check valves to the pump. Account for the washer
gaskets.
8. Remove the check valves. Account for two gaskets.
INSTALLING
1. In turn on each front union bolt, install a washer gas-
ket, check valve, and washer gasket; then install on
the oil-injection pump.
2. Place the gasket and oil-injection pump near the
engine; then install the lower union bolt through a
gasket, check valve, and gasket.
3. Position the oil-injection pump on the engine making
sure the oil-injection pump gear is correctly aligned
with the oil-injection pump drive gear.
4. Secure the pump with two screws (coated with blue
Loctite #243). Tighten screws to 96 in.-lb.
5. Connect the oil-delivery hoses to the adapter plates.
Secure with clamps.
6. Connect the oil-injection cable/control rod to the
pump and secure.
7. Connect the oil-supply hose to the oil-injection pump
inlet fitting. Secure with the clamp.
8. Bleed the oil-injection system.
9. Check the oil-injection system synchronization (see
SYNCHRONIZING in this sub-section). Tighten the
jam nuts securely.
10. Install the throttle bodies.

NOTE: Install the exhaust system and the air
silencer (see the Engine-Related Items section).
SYNCHRONIZING
0742-331
0746-376
CAUTION
When servicing the oil-injection system, use a 100:1
gas/oil mixture in the gas tank to ensure adequate
engine lubrication. Failure to use the 100:1 mixture to
the oil-injection system will result in severe engine
damage.
4000
8000