{"product_id":"castair-replacement-pump-motor-kit-mkp75","title":"Castair Replacement Pump Motor Kit MKP75","description":"\u003cp\u003eThe Castair MKP75 Preventative Maintenance Kit covers the P75 air end on 5–15HP rotary screw compressors. This is the entry-level PM kit in Castair''s maintenance kit lineup — the right service bundle for smaller rotary screw units running the P75 air end. Like all four Castair PM kits, it ships as a complete service package: two air filters (20DP), four oil filters (ROFD62-P75), one separator filter (RSFLD3-4-6-G11-P75), and five gallons of CAST-LUBE synthetic compressor oil. That covers one full service interval for a P75-equipped unit, at a 10% savings versus buying the same parts individually.\u003c\/p\u003e\n\n\u003ch3\u003eP75 Air End — Platform Context\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir end designation:\u003c\/strong\u003e P75, used in Castair rotary screw compressors in the 5–15HP range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHP range covered:\u003c\/strong\u003e 5HP, 7.5HP, 10HP, and 15HP Castair rotary screw models with P75 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame oil filter as D62:\u003c\/strong\u003e The MKP75 and MKD62 share the same oil filter part number — ROFD62-P75. That part number encompasses both air end platforms. The air filter (20DP for P75 vs. RAFD6-62 for D62) and separator (RSFLD3-4-6-G11-P75 vs. RSFD62) are different. Confirm your air end before ordering if your unit is near the 15HP boundary between these two kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared separator with G11 kit:\u003c\/strong\u003e The separator filter (RSFLD3-4-6-G11-P75) in this kit is also used in the MKG11 kit and fits the D3, D31, D4, D6, G11, and P75 air ends. If you run multiple Castair platforms, this separator covers a broad range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy a Kit Instead of Individual Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10% discount vs. individual parts:\u003c\/strong\u003e All four Castair PM kits are priced at 10% below individual part purchases. The savings accrue every service cycle — if you service your compressor on schedule (which you should), the kit pricing adds up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete service interval, one shipment:\u003c\/strong\u003e Two air filters, four oil filters, one separator, and five gallons of CAST-LUBE. Nothing to chase down separately, no partial-service situations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM parts, not aftermarket substitutes:\u003c\/strong\u003e Every filter in the MKP75 is a Castair-spec part matched to the P75 air end. Aftermarket rotary screw filters sometimes have dimensional differences that affect sealing — with an OEM kit, that variable is eliminated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect oil in the box:\u003c\/strong\u003e CAST-LUBE is Castair''s own synthetic formulation for rotary screw air ends. Running the wrong oil in a rotary screw — incorrect viscosity, incompatible additive package — accelerates bearing and rotor wear. The kit removes any ambiguity about which oil to use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Filters (qty 2):\u003c\/strong\u003e Part number 20DP. Sized for the P75 air end. The 20DP is the P75-specific air filter — do not substitute filters from the D62 (RAFD6-62) or G11 (RAFG11) kits, which have different dimensions and configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filters (qty 4):\u003c\/strong\u003e Part number ROFD62-P75. Spin-on design. Shared with the D62 air end — the same physical filter covers both the P75 and D62 platforms. Four filters in the kit supports one service interval.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Filter (qty 1):\u003c\/strong\u003e Part number RSFLD3-4-6-G11-P75. Spin-on design. A broadly-shared separator — compatible with D3, D31, D4, D6, G11, and P75 air ends. The separator removes entrained oil from compressed air downstream of the air end; replacing it on schedule prevents oil carry-over into your air lines and tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAST-LUBE Synthetic Compressor Oil (5 gallons):\u003c\/strong\u003e Castair''s own synthetic oil for rotary screw air ends. Provides oxidation and thermal stability through operating cycles. Five gallons covers one oil change for a unit in the 5–15HP range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2x Air Filter 20DP (P75 air end)\u003c\/li\u003e\n\u003cli\u003e4x Oil Filter ROFD62-P75 (spin-on, also fits D62 air end)\u003c\/li\u003e\n\u003cli\u003e1x Separator Filter RSFLD3-4-6-G11-P75 (spin-on, multi-platform)\u003c\/li\u003e\n\u003cli\u003e5 gallons CAST-LUBE synthetic compressor oil\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Castair Preventative Maintenance Kits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKP75 — P75 Air End, 5–15HP (this kit):\u003c\/strong\u003e Two air filters (20DP), four oil filters (ROFD62-P75), one separator (RSFLD3-4-6-G11-P75), five gallons CAST-LUBE. Entry-level PM kit for smaller Castair rotary screw units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKG11 — G11\/C11 Air End, 5–15HP:\u003c\/strong\u003e $628.47. Two air filters (RAFG11, ID: 2 5\/8\", OD: 3 7\/8\", HGT: 3 1\/8\"), four oil filters (ROFD3-4-G11), one separator (RSFLD3-4-6-G11-P75), five gallons CAST-LUBE. For G11\/C11 platform units. Shares the separator with MKP75 but uses different air and oil filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKD62 — D62 Air End, 15–25HP:\u003c\/strong\u003e $704.70. Two air filters (RAFD6-62, ID: 4 3\/4\", OD: 6 1\/8\", HGT: 2 7\/8\"), four oil filters (ROFD62-P75 — same as MKP75), one separator (RSFD62 — different from MKP75), five gallons CAST-LUBE. For mid-range 15–25HP units. Shares the oil filter with MKP75 but uses a different air filter and D62-specific separator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKG30R — G30 Air End, 15–30HP:\u003c\/strong\u003e Two air filters (32DP, ID: 5 3\/4\", OD: 9 1\/4\", HGT: 5 3\/16\"), four oil filters (ROFD16-G30), one separator (RSFD10-16-G30), five gallons CAST-LUBE. Largest PM kit in the lineup, for 15–30HP G30 platform units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll four kits save 10% vs. individual parts. If you are not certain which air end your compressor has, call 866-217-0063 with your model number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eFilter Reference — P75 Air End Individual Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Filter:\u003c\/strong\u003e 20DP — P75 air end specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter:\u003c\/strong\u003e ROFD62-P75 — spin-on, also fits D62 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Filter:\u003c\/strong\u003e RSFLD3-4-6-G11-P75 — spin-on, fits D3\/D31\/D4\/D6\/G11\/P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil:\u003c\/strong\u003e CAST-LUBE synthetic, available in 5-gallon jugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou have a 5–15HP Castair rotary screw unit with a P75 air end\u003c\/strong\u003e coming up on its service interval. This is the correct PM kit. The 20DP air filter is P75-specific — do not use a different kit''s air filter on a P75 unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou are setting up a PM program for a small shop compressor:\u003c\/strong\u003e A 5–15HP rotary screw is often a shop''s primary or only air source. Scheduled PM prevents the kind of filter neglect that leads to oil carryover, dirty air, and accelerated air end wear. The MKP75 makes it easy to have everything ready when service is due.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou run both P75 and D62 units:\u003c\/strong\u003e The oil filter (ROFD62-P75) in this kit is shared with the D62 platform. If you have both P75 and D62 units, you can stock the oil filters from either kit to cover both machines. The air filters and separators are different — those stay platform-specific.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou run multiple Castair platforms and want to minimize separator SKUs:\u003c\/strong\u003e The separator (RSFLD3-4-6-G11-P75) in this kit covers D3, D31, D4, D6, G11, and P75 air ends. If your shop has a mix of smaller Castair units, this separator is a useful common stocking part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to MKD62 instead\u003c\/strong\u003e if your unit is a 15–25HP machine with a D62 air end. D62 and P75 share an oil filter but have different air filters and separators — the kits are not interchangeable at the air filter level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to MKG30R instead\u003c\/strong\u003e for 15–30HP G30 air end units. The G30 uses significantly larger filters across the board — nothing from the MKP75 kit carries over to a G30 unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIf you are unsure whether your unit has a P75 or G11 air end:\u003c\/strong\u003e Both are 5–15HP platforms with different filter requirements. The air filters are different (20DP for P75, RAFG11 for G11). Call 866-217-0063 with your model number and we will confirm which kit is correct.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Part Number:\u003c\/strong\u003e MKP75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir End:\u003c\/strong\u003e P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHP Range:\u003c\/strong\u003e 5–15HP rotary screw compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Filter P\/N:\u003c\/strong\u003e 20DP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Filter Type:\u003c\/strong\u003e P75 air end specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Filter Qty in Kit:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter P\/N:\u003c\/strong\u003e ROFD62-P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter Type:\u003c\/strong\u003e Spin-on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter Also Fits:\u003c\/strong\u003e D62 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter Qty in Kit:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Filter P\/N:\u003c\/strong\u003e RSFLD3-4-6-G11-P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Filter Type:\u003c\/strong\u003e Spin-on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Also Fits:\u003c\/strong\u003e D3, D31, D4, D6, G11 air ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparator Filter Qty in Kit:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Type:\u003c\/strong\u003e CAST-LUBE synthetic compressor oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Qty in Kit:\u003c\/strong\u003e 5 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSavings vs. Individual Parts:\u003c\/strong\u003e 10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Cast Air)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor parts specialists:\u003c\/strong\u003e The P75 and G11 kits are both 5–15HP kits and easy to mix up if you do not know your air end designation. We know which kit matches which Castair air end, and we confirm compatibility before the order ships.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping:\u003c\/strong\u003e The MKP75 ships free. Five gallons of synthetic oil plus multiple filters is not a lightweight order — free shipping is meaningful on parts purchases of this type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support:\u003c\/strong\u003e Call 866-217-0063 before ordering if you are not certain whether your unit has a P75, G11, or D62 air end. We will confirm the correct PM kit for your specific compressor before you spend money on the wrong parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty:\u003c\/strong\u003e Castair OEM filters and oil carry the full Castair warranty. No aftermarket substitutes, no gray-market parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest recommendations:\u003c\/strong\u003e If the MKP75 is not the right kit for your machine, we will tell you which one is. We do not sell kits that do not fit your equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342572249301,"sku":"MKP75","price":1239.66,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-replacement-pump-motor-kit-mkp75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}