Oil Check Valve Testing (Ec25Pf); Oil Check Valve Testing (Ec28Pf) - Polaris Trail Blazer Service Manual

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EC25PF/EC28PF Engine

Oil Check Valve Testing (EC25PF)

The oil pump check valve on the EC25PF engine must be

tested by applying 2-7 PSI of pressure to the line spigot of

the check valve. Use a Mity Vac (PN2870975) or similar

tester. The valve should release between 2 and 7 PSI. The

check valve is located on the cylinder.

The oil pump check valve on the EC28PF engine must be

tested by applying 3-7 inches of mercury VACUUM to the

line spigot of the check valve. The valve should release be-

tween 3 and 7 inches of mercury.

(PN2870975) or similar vacuum tester. The check valve is

located on the oil pump.

Thrust Washer (3083428)

S Not used with plastic drive gear

S Must be used with metal drive gear

Plastic (3084825)

Metal (3083429)

Bushing end play

Use a Mity Vac

EC25PF - Apply 2-7 PSI pres-

sure to the line fitting

EC28PF - Apply 2-7 inches

of mercury VACUUM to the line

Engine oil check valve should release at 2 to 7 PSI

Pump Bleed Screw

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