NAPCO Pump Parts Identification Chart
In addition to the NAPCO Spare Part Repair Kits and Gear Assemblies discussed above, a customer may also order specific spare parts from NAPCO. Please consult the blow-out diagram below to identify the specific part needed, including name and identification number. Many parts are available in ductile iron or stainless steel material. Ductile iron parts have a “C” letter in their part number. Stainless steel parts have an “S” letter in their part number.
| DESCRIPTION | PART NUMBER | REFERENCE NUMBER | NUMBER PER PUMP |
| 3" PUMP | PA300C or PA300S | ||
| 3" Service Kit | PK300C or PK300S | ||
| Idler Shaft | PM304C or PM304S | 4 | 1 |
| Drive Shaft | PM303C or PM303S | 3 | 1 |
| Pump Housing 3" | PM0301C or PM0301S | 1 | 1 |
| Driver Gear 3" | PM306N | 9 | 1 |
| Idler Gear 3" | PM306N | 9 | 1 |
| Port Bolt | 5/8-11 x 1.5" hex bolt C or S | 16 | 4 |
| Port Gasket | PB316 | 14 | 2 |
| 2" PUMP | PA200C or PA200S | ||
| 2" Service Kit | PK200C or PK200S | ||
| Idler Shaft | PM204C or PM204S | 4 | 1 |
| Drive Shaft | PM203C or PM203S | 3 | 1 |
| Pump Housing 2" | PM0201C or PM0201S | 1 | |
| Driver Gear 2" | PM206N | 9 | 1 |
| Idler Gear 2" | PM206N | 9 | 1 |
| Port Bolt | 5/8-11 x 1.5" hex bolt C or S | 16 | 4 |
| Port Gasket | PB216 | 14 | 2 |
| COMMON PARTS | |||
| Bearing Housing/Side COver | PM002C or S | 2 | 2 |
| Set Screw | NAP- 1/4-2.8 x .5snss | 5 | 2 |
| Gasket .016" | PM007G02 | 7 | 4 |
| Gasket .008" | PM007G01 | 7 | 3 |
| Roller Bearing | PM038 | 8 | 4 |
| Seal Low Pressure | PM037 | 10 | 4 |
| Seal High Pressure | PM036 | 11 | 4 |
| Side Cover Bolt | 3/8-16 x 1.25" hex bolt C or S | 17 | 24 |
| Grease Nipple ss | H1610S | 18 | 8 |
| Aligning Pin | PM42 | 19 | 2 |
| O-ring | PB43 | 25 | 4 |
| Backing Washer | PM226 | 27 | 4 |