Arctic Cat M 8000, Service Manual

Page: 135 / 210

134
1. Rotate the control rod until the setting for oil pump at
wide open throttle is 1 to 1.5 lines lean. Return the
control rod/throttle cable to the Idle position.
2. Open and close the throttle lever to verify proper
operation and that the throttle linkage returns to the
fully CLOSED position. Do not adjust the oil
pump at idle, only at WOT.
TESTING

NOTE: These tests must be made with the snowmo-
bile and oil at a “room” temperature of 20°-30° C
(68°-86° F).
1. Disconnect the oil pump cable/control rod from the
control rod on the pump.
2. Clamp off the oil-supply hose between the oil reser-
voir and oil pump; then remove the supply hose from
the pump.
3. Attach a suitable length of clear oil-supply hose to
the oil pump; then using Oil Injection Usage Tool,
fill the hose with Arctic Cat Synthetic APV 2-Cycle
Oil.

NOTE: Do not fully insert the usage tool into hose.
There must be enough room around the tip of the tool
and the hose to allow air in the hose to escape.
4. Fill the tool to the 0 line.
5. Wipe the tip of the tool to remove excess oil; then
attach the tool to the oil-supply hose and remove the
bulb.
6. Secure the tool to the oil reservoir by twisting the
rubber strap one half turn and placing the rubber
strap around the tool and the oil reservoir filler neck.

NOTE: To access the oil pump, the air intake boot
must be removed.
 NOTE: The control rod must be secured in the Idle
position. Secure the rod away from any moving parts
to prevent misalignment of the control rod due to
engine/chassis movement.
7. With the control rod secured in the Idle position, start
the engine and run the engine at recommended RPM
for 3 minutes. Compare the amount of oil used
against the specifications listed.

NOTE: Before starting the engine, make sure that
no air is present in the testing equipment.
8. With the control rod secured in the Full-Open posi-
tion (line-to-line), run the engine at recommended
RPM for 2 minutes. Compare the amount of oil used
against the specifications listed.
9. If the oil-injection pump output does not meet the
specifications, see TESTING CHECK VALVES in
this sub-section.
10. Disconnect the oil usage tool, remove the plug from
the reservoir, and attach the oil-supply hose to the oil
reservoir.

NOTE: After testing the oil pump, the oil pump
must be correctly synchronized with the carbure-
tors/throttle bodies (see SYNCHRONIZING in this
sub-section).
TESTING CHECK VALVES
If an engine problem occurs due to lack of lubrication,
the check valves should be tested using a vacuum pump
to make sure they are operating properly.
1. Remove the check valves from the oil-injection
pump.
2. Attach the Vacuum Test Pump hose to the check
valve.
3. Squeeze the vacuum pump handle and watch the
pump gauge. The check valve should release at 4.5-5
lb and again reset itself at 3.5-4 lb. If “release” and
“reset” are not within specifications, replace the
check valve.
4. Record the “release” and “reset” readings for the
valve; then perform the test on the other valve. The
“release” and “reset” readings must fall within speci-
fications and must be within 1.5 lb of each other. If
either or both are not met, replace the check valves.
5. If the check valves are within specifications but
oil-injection usage is not, replace the oil-injection
pump.
Electric Oil Pump (6000)
REMOVING
1. Remove the right-side access panel; then remove the
torx screw securing the right-side skid plate and
secure it out of the way.
2. Using a handlebar stand, carefully tip the snowmo-
bile onto the left side.

NOTE: When removing the oil pump assembly,
make sure the oil level is low enough so when the
pump is removed that oil does not leak out of the oil
tank.
CAUTION
Assure the throttle cable/linkage has returned to the
fully closed (idle) position and has not remained par-
tially open and moves freely from the open position to
the closed position.
! WARNING
Always wear safety glasses when performing this test.
! WARNING
Keep hands and clothing away from all moving or rotat-
ing parts.
Model RPM Full-Closed (Idle) 3 Minutes
8000 1833 1.32-3.48 cc
4000 1833 1.0-2.5 cc
Model RPM Full-Open 2 Minutes
8000 1833 8.74-10.8 cc
4000 1833 7.4-10.3 cc