Crane Pumps & Systems Pump SE51HTAU

Use a flashlight to inspect the oil in the motor housing

Is the oil light amber in color?

Is the oil free from suspended particles?

Is the oil level just above the motor when pump is in vertical position?

Remove hex bolts and lockwashers

Lift motor and seal plate assembly from volute

Clean out volute body if necessary

Clean and examine impeller for pitting or wear

Inspect gasket and replace if cut or damaged

Replace impeller using screwdriver to hold shaft stationary while unscrewing jam nut and impeller

Disassemble volute and impeller to expose shaft seal

Examine all seal parts and contact faces for wear and damage

Remove retaining ring, spring, and rotating member from shaft if repair is needed

Remove stationary member by prying out with flat screwdriver if replacing seal

Clean and oil seal cavities in seal plates

Lightly oil outer surface of stationary member

Place pump on its side and remove pipe plug (39) from motor housing (6) to drain oil into a clean, dry container.

Check oil for contamination using an oil tester with a range to 30 Kilovolts breakdown.

Is the oil clean and uncontaminated?

If oil is clean and uncontaminated

Refill the motor housing as per section F-1.4.

If oil is dirty or contaminated

Drain oil from motor as outlined in paragraph F-1.1

Disassemble volute and impeller as outlined in paragraph F-2.1

Disassemble shaft seal as outlined in paragraph F-3.1

Position unit upright using blocks to avoid resting unit on shaft

Unscrew cable hex bolts and remove compression flange and power cord

Remove snap ring with a flat head screwdriver

Pull the terminal block out of the housing using a T-bolt or pair of pliers and a .25-20 screw

Leave slack on the motor leads connected underneath