Cat Pumps 8022 Electric Adapter Mount Assembly for 3 & 5 HP Hollow Shaft Motors
The Cat Pumps 8022 is the adapter mount that turns a hollow shaft electric motor and a Cat 5 frame plunger pump into a single, close-coupled direct drive unit. Instead of belts, pulleys, guards and a base plate, the pump slides onto the motor's hollow shaft and the 8022 flange bolts the two housings together. The result is a compact assembly with fewer wear points, less alignment fuss, and no belt tension to check every few months.
It is sized for the 3 HP and 5 HP hollow shaft motors used across the Cat BD motorized line, including the 8026ES, 8027ES, 8028ES and 8029ES, and it mates to the 5 frame pump end. That covers a wide range of everyday equipment: car wash bays and self-serve wands, industrial parts washers, misting and humidification systems, reverse osmosis and membrane feed skids, agricultural spraying, hydrostatic testing, and general plant washdown. Marine work is only one small slice of where these pumps end up, and the same adapter serves land-based installations just as well.
Because this is a genuine Cat Pumps component rather than a generic plate, the bolt pattern, pilot fit and material thickness match what the factory specified, so it drops into place without shimming or drilling. Anyone rebuilding a worn motorized unit, swapping a failed motor, or converting a belt-driven setup to direct drive will find the 8022 is the piece that makes the two halves talk to each other. At roughly three pounds it ships easily and installs with basic hand tools.
Key Features
- Genuine Cat Pumps OEM adapter mount assembly, part number 8022
- Couples 3 HP and 5 HP hollow shaft electric motors directly to Cat 5 frame plunger pumps
- Eliminates belts, sheaves, guards and separate base plates for a compact footprint
- Factory bolt pattern and pilot fit for correct concentricity and no field modification
- Reduces vibration and alignment drift compared with belt-driven arrangements
- Rigid one-piece flange construction for long service life under continuous duty
- Simple assembly with common hand tools; ideal for motor swaps and unit rebuilds
- Supports both single phase and three phase hollow shaft motor configurations
Applications
- Car wash and self-serve bay high pressure pump stands
- Industrial and commercial pressure washing equipment
- Parts washers and plant washdown systems
- Reverse osmosis, membrane feed and water treatment skids
- Misting, fogging, humidification and dust suppression systems
- Agricultural and horticultural spraying equipment
- Hydrostatic and pressure testing rigs
- Food processing sanitation and general OEM machinery builds
- Marine deck wash and freshwater systems, among many land-based uses
Specifications
- Part Number: 8022
- Product Type: Electric motor adapter mount / flange assembly
- Motor Horsepower Range: 3 HP and 5 HP
- Motor Shaft Type: Hollow shaft
- Pump Frame Compatibility: Cat Pumps 5 frame pump ends
- Compatible Motor Models: 8026ES, 8027ES, 8028ES, 8029ES
- Drive Configuration: Direct drive, close-coupled
- Typical Pump Speed Range: 1725 rpm nominal
- Mounting Style: Flange mount, motor-to-pump
- Product Weight: Approximately 2.92 lb (1.32 kg)
- Manufacturer: Cat Pumps
Frequently Asked Questions
Q: Will the 8022 work with a solid shaft motor instead of a hollow shaft motor?
A: No. The 8022 is built specifically for hollow shaft motors, where the pump's shaft slides into the motor. A solid shaft motor requires a different coupling arrangement or a belt drive setup.
Q: Does the 8022 include the mounting hardware and key?
A: The assembly ships as an adapter mount. Fasteners, keys and any shaft hardware supplied with your motor or pump should be reused, and it is worth confirming what you have on hand before starting the install.
Q: Can I use this adapter to convert a belt-driven pump to direct drive?
A: Yes, provided your pump is a Cat 5 frame end and you pair it with a compatible 3 HP or 5 HP hollow shaft motor. The 8022 is the mechanical link that makes that conversion possible.
Q: How long does installation typically take?
A: Most technicians complete the job in well under an hour. The pump shaft is fitted to the motor, the flange is aligned to the bolt pattern, and the fasteners are torqued evenly in a cross pattern.
Q: Is a 1.5 HP motor compatible with this adapter?
A: Not with the 8022. Smaller motors such as the 1.5 HP 56C frame units use a different flange assembly, so verify your motor frame and horsepower before ordering.
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