Blackmer Liquified Gas Pump RC20

Warning: This procedure requires trained personnel with PPE!

Enter the operational hours of the machine

Inspect both Ball Bearings for wear

If a major overhaul is required, replace the Ball Bearings

Sign off on the Ball Bearing replacement

NOTICE: Follow all hazard warnings and instructions provided in the “Pump Maintenance” section of this manual

Drain and relieve pressure from the pump and system as required

Remove Motor, Coupling Guards, Pump Coupling half and Pump Shaft Key

Remove Cover, Impeller and Impeller Key. The Coupling Guard retaining screws (37A) may be screwed into the Impeller to aid removal

Unscrew four setscrews from Cartridge

Insert setscrews into the two extraction holes and screw in evenly to extract the Shaft Assembly

Remove Circlip from end of Shaft Assembly. Remove Mechanical Seal Assembly. The Coupling Guard retaining screws may be screwed into the Impeller and/or Seal Assembly to aid removal

Remove Carbon Seal Seat and Lip Seal from Cartridge

Remove Circlip and press Bearings from Shaft

Impeller and Seal Zone of Body checked for damage or wear

Impeller blades damaged or wear exceeds minimum recommended

Shaft checked for wear, damage or run-out

Mechanical Seal components checked for wear or damage

Mechanical Seal components need replacement

All O-Rings replaced at every overhaul or when any disassembly is conducted

Sign off on the Liquified Gas Pump Inspection

NOTICE: Maintenance shall be performed by qualified technicians only, following the appropriate procedures and warnings as presented in this manual

If any abnormal condition is discovered, cease operation of pump immediately and take action to rectify the problem. Record observations from these inspections in Pump Run Log

Inspect the Pump for LPG leaks, vibration, abnormal noises, signs of overheating, discoloration, etc

Inspect Coupling Assembly for signs of wear, overheating, discoloration, etc

Check Pump differential pressure

Inspect motor for vibration, abnormal noises, signs of overheating, discoloration, etc

Sign off on the pump inspection

Cover, Impeller and Impeller Key removed

Four setscrews from Cartridge unscrewed

Circlip from end of Shaft Assembly removed

Mechanical Seal Assembly removed

Carbon Seal Seat and Lip Seal from Cartridge removed

Relevant components inspected and repaired or replaced as required

All parts cleaned and any burrs removed

Impeller maintains an accurate free sliding fit on Shaft and key

O-Rings, Lip Seals and Mechanical Seal Faces lightly lubricated with a compatible good quality detergent-free light oil before assembly