Alfa Laval Rotary Lobe Displacement Pump GHPD-832P

CAUTION! DRIP LEAKAGE IS ESSENTIAL TO PREVENT OVER HEATING OF THE GLAND AREA WHICH WILL CAUSE SEAL FAILURE.

IMPORTANT! Stop and remove gland guard for checking temperature of housing and observing leakage. ALWAYS REPLACE THE GUARD BEFORE RESTARTING.

1. Lightly tighten up the gland follower.

2. Flood the pumphead and determine if the gland leakage is acceptable. Tighten the gland follower nuts until an acceptable leakage is achieved.

3. Start the pump and allow to run for 10 minutes. If the gland becomes significantly hotter than other parts of the pump, the gland is too tight.

4. Stop the pump and allow it to cool then repeat the above until the gland temperature is stable and gland slightly weeping.

5. Run the pump at 10 minute intervals tightening the gland follower nuts by a ½ of a turn until the leak is at an acceptable rate.;

CAUTION! COMPLETE DISASSEMBLY IS ONLY REQUIRED IF THE 'O' RINGS OR SPRINGS ARE TO BE REPLACED.

- The relief valve should not be disassembled while the plug is in operation. Always observe the safety precautions detailed at the front of this manual.

- Take extreme care when removing the springs as they have been compressed.

2. Release and remove the notched nuts) with the spring adjuster.

3. Take off the springs, release the socket head cap screws and remove the valve guide.

4. Access to the pneumatic piston 'O' rings is achieved by releasing the circlip which locates in the valve shaft.

5. The hydraulic piston with the shaft may be lifted out of the front cover once the backstop disc is removed.

1. Firmly press on the o-rings (15) to the rear stationary faces (14) and locate them within the rear flush housing (16,17).

2. Carefully fit the rear seal housings (16,17) with the stationary face onto the shaft (22). (Caution: do not chip stationary face).

3. Push outboard rotary assembly (10,11) onto pump shaft (22) to the setting dimension (A) indicated on the assembly drawing and tighten set screws.

4. Locate o-rings on the shaft (5, rotary) and within the rotorcase bore (1, stationary).

5. Press washer (7) underneath the inside drive pin into the rotary face (6) and gently slide onto the shaft, locating the pin in the shaft slot.

6. Position the wave spring (3) over the stationary face (2), push into the rotorcase.

7. Position front seal housing (9) onto rotorcase and hex head tighten screws (8). Be sure not to over tighten.

8. Refit the rotorcase, using the shaft sleeve to ensure stationary seal is not chipped during assembly.

9. Fit rear seal housings (16,17) and o-rings (12) to front flush housings (9) and tighten the hex nuts (18). (Caution: Be sure not to overtighten the hex nuts).;

1. Checking the oil level in the gearcase (if applicable).

2. Checking the mechanical seals for leakage and replacing as necessary.

3. Adjusting the packed glands to control leakage.

4. Checking the oil seals for leakage.

1. Pump supplied grease filled.

2. Change - every two years (dusty air conditions)

* Change - every six years (clean air conditions)

3. Fill with grease by pumping grease into the rear of the gearcase.;