The Castair MKD62 Preventative Maintenance Kit covers everything you need to service the D62 air end on 15–25HP rotary screw compressors in a single order. Instead of hunting down an air filter here, an oil filter there, and hoping the separator you ordered is the right spin-on type, this kit ships as a complete PM bundle: two air filters, four oil filters, one separator filter, and five gallons of Castair's own CAST-LUBE synthetic compressor oil. That's a full service interval in one box, and because Castair builds the kit, every part is spec'd to fit the D62 air end exactly.
Why Buy a Kit Instead of Individual Filters
- 10% savings vs. individual parts: Castair prices the MKD62 at a 10% discount compared to buying the same filters and oil separately. On a $700 purchase, that's real money back in your parts budget.
- One order, one shipment: PM kits eliminate the common problem of completing a service and realizing you forgot to order the separator filter or you're one oil filter short. Everything arrives together.
- OEM-matched components: Every filter in the kit is a Castair-spec part designed for the D62 air end. No cross-referencing aftermarket substitutes and hoping the dimensions match.
- Covers a full service interval: The kit includes enough filters for one complete preventative maintenance cycle plus the oil change. When your compressor hits its service hours, you pull this kit off the shelf and get it done.
Kit Components
- Air Filters (qty 2): Part number RAFD6-62. Paper element design. ID: 4 3/4", OD: 6 1/8", Height: 2 7/8". Fits D62 and D62 paper configurations.
- Oil Filters (qty 4): Part number ROFD62-P75. Spin-on design for quick no-mess changes. Shared spec with the P75 air end — one filter part number covers both platforms.
- Separator Filter (qty 1): Part number RSFD62. Spin-on design. The separator is the most critical filter in a rotary screw system — it pulls oil out of the compressed air stream before it reaches your downstream equipment. Using an OEM separator protects both the compressor and your air tools.
- CAST-LUBE Synthetic Compressor Oil (5 gallons): Castair's own formulation for rotary screw air ends. Synthetic base for extended drain intervals, oxidation resistance, and protection at operating temperature. Using the correct oil in a rotary screw air end is not optional — the wrong viscosity or additive package accelerates wear on the air end bearings and rotors.
Air End Compatibility
- Primary fit: D62 air end, 15–25HP rotary screw compressors
- HP range covered: 15HP, 20HP, and 25HP units equipped with the D62 air end
- Common units in this range: Castair's 15–25HP rotary screw models in both horizontal and vertical tank configurations
- Cross-reference note: The oil filter ROFD62-P75 is shared with the P75 air end (covered by the MKP75 kit). The air filter RAFD6-62 is specific to the D62 platform — verify your air end designation before ordering if you are unsure.
What's in the Kit
- 2x Air Filter RAFD6-62 (D62 / D62 paper, ID: 4 3/4", OD: 6 1/8", HGT: 2 7/8")
- 4x Oil Filter ROFD62-P75 (spin-on)
- 1x Separator Filter RSFD62 (spin-on)
- 5 gallons CAST-LUBE synthetic compressor oil
Available Castair Preventative Maintenance Kits
- MKP75 — P75 Air End, 5–15HP: Two air filters (20DP), four oil filters (ROFD62-P75), one separator (RSFLD3-4-6-G11-P75), five gallons CAST-LUBE. For smaller rotary screw units on the P75 platform.
- MKD62 — D62 Air End, 15–25HP (this kit): $704.70. For mid-range 15–25HP rotary screw compressors. The most common PM kit for shops running Castair units in the 20HP class.
- MKG11 — G11 Air End, 5–15HP: Two air filters (RAFG11), four oil filters (ROFD3-4-G11), one separator (RSFLD3-4-6-G11-P75), five gallons CAST-LUBE. For smaller G11 platform units.
- MKG30R — G30 Air End, 15–30HP: Two air filters (32DP), four oil filters (ROFD16-G30), one separator (RSFD10-16-G30), five gallons CAST-LUBE. For larger G30 platform units up to 30HP.
All kits save 10% compared to purchasing filters and oil individually. Call 866-217-0063 if you are unsure which kit matches your compressor.
Filter Reference — D62 Air End Individual Parts
- Air Filter: RAFD6-62 — ID: 4 3/4", OD: 6 1/8", HGT: 2 7/8" — fits D62 and D62 paper configurations
- Oil Filter: ROFD62-P75 — spin-on, shared with P75 air end
- Separator Filter: RSFD62 — spin-on, D62-specific
- Oil: CAST-LUBE synthetic, 5-gallon jugs available separately
When Does a Shop Need This Kit
- You have a 15–25HP Castair rotary screw compressor with a D62 air end and it is approaching its scheduled service interval. This is the correct kit — order it, put it on the shelf, and service the unit on schedule.
- You are setting up a PM program for a fleet of shop compressors and want to pre-stock service kits. The MKD62 is the right stocking unit for D62-equipped machines.
- You are stepping up from a smaller unit (P75 or G11 air end) to a 15–25HP machine. The D62 requires its own air filter — do not try to use G11 filters on a D62.
- You run a 20HP compressor hard — multiple shifts, high duty cycle — and want to ensure you have OEM-spec consumables on hand rather than scrambling when a filter check comes due mid-week.
- Consider the MKG30R instead if your unit is a 25–30HP machine with a G30 air end. The G30 uses larger filters (32DP air filter, OD: 9 1/4") and different oil and separator specs. Confirm your air end designation before ordering.
- Consider the MKG11 or MKP75 instead if your unit is under 15HP — those kits have the correct filter dimensions for their respective air ends.
Technical Specifications
- Kit Part Number: MKD62
- Air End: D62
- HP Range: 15–25HP rotary screw compressors
- Air Filter P/N: RAFD6-62
- Air Filter ID: 4 3/4"
- Air Filter OD: 6 1/8"
- Air Filter Height: 2 7/8"
- Air Filter Type: Paper element
- Air Filter Qty in Kit: 2
- Oil Filter P/N: ROFD62-P75
- Oil Filter Type: Spin-on
- Oil Filter Qty in Kit: 4
- Separator Filter P/N: RSFD62
- Separator Filter Type: Spin-on
- Separator Filter Qty in Kit: 1
- Oil Type: CAST-LUBE synthetic compressor oil
- Oil Qty in Kit: 5 gallons
- Kit Price: $704.70
- Savings vs. Individual Parts: 10%
- Manufacturer: Castair (Cast Air)
Why Buy From Air Compressor Factory Direct?
- Compressor parts specialists: We focus exclusively on air compressor parts and equipment. We know the Castair product line — which kits fit which air ends, which filters cross-reference, and what to do when the part number on your unit doesn''t match the catalog exactly.
- Free shipping: The MKD62 ships free. A 5-gallon oil kit with filters is not a light box — free shipping matters on parts orders like this.
- Free tech support: Call 866-217-0063 with your compressor model number before you order if you have any doubt about compatibility. We will confirm the correct kit for your air end before you spend $700 on the wrong parts.
- Full manufacturer warranty: All Castair parts and kits ship with the full Castair warranty. OEM parts, OEM coverage.
- Honest guidance: If the MKD62 is not the right kit for your machine, we will tell you. We would rather get you the correct part the first time than process a return.
Call 866-217-0063 for quick answers and help!
