Arctic Cat 2014 SNO PRO 500, Operator'S Manual

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60
Testing Oil-Injection Pump

NOTE: These tests must be made with the snow-
mobile and the oil at a “room” temperature of 20°-
30° C (68°-86° F).
1. Disconnect the oil pump cable from the control
arm on the pump.
2. Clamp off the oil-supply hose between the oil res-
ervoir 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
(p/n 0644-007), fill the hose with Arctic Cat For-
mula 50 Oil.

NOTE: Use clear hose when performing this test
to simplify the detection of air in the testing equip-
ment.

NOTE: Use Arctic Cat Formula 50 Oil. Use of any
other oil will cause inaccurate oil consumption
readings.

NOTE: When filling the oil-supply hose with oil, 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 usage tool with recommended oil 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.
7. With the control arm secured in the FULL-
CLOSED (Idle) position, start the engine and run
the engine at recommended RPM for 3 minutes.
Compare the amount of oil used against the speci-
fications on the Oil Consumption Specifications
chart in Section 1.

NOTE: Before starting the engine, make sure that
no air is present in the testing equipment.
8. With the control arm secured in the FULL-OPEN
position (line-to-line), run the engine at recom-
mended RPM for 2 minutes. Compare the amount
of oil used against the specifications chart.
9. If the oil-injection pump output does not meet the
specifications, see Testing Oil-Injection Check
Valves in this section.
10. Disconnect the oil usage tool, remove the plug
from the reservoir, attach the oil-supply hose to the
oil reservoir.

NOTE: After testing the oil pump, the oil pump
must be correctly synchronized with the throttle
bodies (see Inspecting/Adjusting/Synchronizing
Oil-Injection Pump in this sub-section).
Testing Oil-Injection Check Valves
In the event an engine problem occurs due to lack of
lubrication, the oil-injection pump check valves should
be tested using a vacuum pump to make sure the check
valves are operating properly.
When testing the check valves, remove them from the
pump assembly.
1. Remove the check valves from the oil-injection
pump.
731-551A
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
specifications and must be within 1.5 lb of each
other. If either or both are not met, replace the
check valves.
! WARNING
Always wear safety glasses when performing this test.
! WARNING
Keep hands and clothing away from all moving or
rotating parts.
CAUTION
Whenever 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.
KEY
1. Gasket
2. Check Valve
3. Gasket
4. Union