Alfa Laval Rotary Lobe Displacement Pump GHPD-422P

Warning: The pump will NOT be supplied oil filled.

Enter the current hours of operation

Has the pump been operated for 150 hours?

If yes, proceed to oil replacement. If no, stop the procedure.

Upload a photo of the oil level in the sight glass.

Sign off on the oil replacement

Check the oil level in the gearcase (if applicable)

Check the mechanical seals for leakage and replace as necessary

Adjust the packed glands to control leakage

Check the oil seals for leakage

Sign off on the weekly pump maintenance

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.

Gland significantly hotter than other parts of the pump?

Gland temperature stable and gland slightly weeping?

Leak at an acceptable rate after tightening the gland follower nuts?

Sign off on the gland adjustment

Select the condition of the air

Enter the date of the next grease change

Was the grease successfully pumped into the rear of the gearcase?

Sign off on the grease replacement

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

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

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

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

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

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

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

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

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)