Monarch Industries Water Pump AOT 4 – 5 – 6 Series End Suction Water Pump & Repair Parts
Monarch Industries Water Pump AOT 4, 5 & 6 Series, End Suction Repair Parts
Monarch Industries Water Pump AOT 4, 5 and 6 Series are frame-mounted, end suction, self-priming centrifugal pumps designed for belt drive or direct drive through a flexible coupling. These pumps may be used with appropriate electric motor or gasoline engine drive systems depending on the installation.
The Monarch Industries Water Pump AOT Series is designed for fluid transfer and pressure-boosting applications in commercial, industrial, and agricultural environments. Rugged cast gray iron construction provides durability for demanding pump installations, while the AOT-4, AOT-5, and AOT-6 models cover several discharge configurations within the series.
Open-face cast gray iron impellers support dependable flow through the AOT pump line. Ken’s Distributing supplies Monarch AOT repair parts including casings, impellers, transmission heads, shaft assemblies, seals, gaskets, washers, and related service components.
Monarch Industries AOT Series Models
| Model | Monarch Industries AOT Series | Code Number |
|---|---|---|
| AOT-4 | Monarch Industries End Suction Water Pump AOT-4 | 615111 |
| AOT-5 | Monarch Industries End Suction Water Pump AOT-5 | 615121 |
| AOT-6 | Monarch Industries End Suction Water Pump AOT-6 | 615131 |
Monarch Industries AOT Series Full Repair Parts List
AOT-4, AOT-5 & AOT-6 Parts by Reference Number
| Ref. # | Code # | Pump Model No. | Qty. | Description |
|---|---|---|---|---|
| 1 | 437711 | AOT-4 | 1 | Casing |
| 1 | 437721 | AOT-5 | 1 | Casing |
| 1 | 437732 | AOT-6 | 1 | Casing |
| 2 | 438110 | AOT-4 | 1 | Impeller |
| 2 | 438120 | AOT-5 | 1 | Impeller |
| 2 | 438150 | AOT-6 | 1 | Impeller |
| 3 | 437860 | AOT-4, AOT-5, Type A | 1 | Transmission Head |
| 3 | 437861 | AOT-4, AOT-5, Type B | 1 | Transmission Head |
| 3 | 437870 | AOT-6, Type A | 1 | Transmission Head |
| 3 | 437862 | AOT-6, Type B | 1 | Transmission Head |
| 8 | 438450 | Type A | 1 | Shaft Assembly |
| 8 | 438451 | Type B | 1 | Shaft Assembly |
| 14 | 119990 | All Models | 4 | Hex. Hd. Bolt |
| 22 | 191790 | All Models | 1 | Flinger |
| 23* | 175500 | All Models | 4 | Aluminum Washer |
| 25 | 185620 | All Models | 2 | Pipe Plug |
| 26* | 193900 | AOT-4, AOT-5 | 1 | Gasket |
| 26* | 193910 | AOT-6 | 1 | Gasket |
| 28 | 432010 | All Models | 1 | Key |
| 29 | 138230 | Type A | 1 | Spring Ring |
| 29 | 137930 | Type B | 1 | Spring Ring |
| 31* | 240250 | All Models | 1 | Seal 5/8 I.D., Type 6 |
* Suggested parts to stock
Monarch AOT Repair Parts
Common service and repair components for the Monarch AOT-4, AOT-5, and AOT-6 include:
- Pump casings
- Open-face impellers
- Transmission heads
- Shaft assemblies
- Mechanical seals
- Gaskets
- Aluminum washers
- Pipe plugs
- Keys and spring rings
- Mounting hardware
Always identify the exact Monarch AOT model and type before ordering service parts. Some components differ between AOT-4, AOT-5, and AOT-6 pumps, while others vary according to Type A or Type B construction.
How to Order Monarch AOT Parts
When ordering replacement parts, provide as much pump identification as possible. The most useful information includes:
- Pump model: AOT-4, AOT-5, or AOT-6
- Pump type: Type A or Type B when applicable
- Code number: The part code shown in the repair-parts list
- Part description: Casing, impeller, shaft assembly, gasket, seal, or other component
- Quantity required
If the pump identification plate is missing or difficult to read, photographs of the pump and existing part may help Ken’s Distributing identify the appropriate Monarch AOT replacement component.
Monarch AOT-4 Repair Parts
The Monarch AOT-4 uses model-specific components including casing 437711 and impeller 438110. Transmission-head selection depends on the pump type, so confirm whether the unit is Type A or Type B before ordering.
Monarch AOT-5 Repair Parts
The Monarch AOT-5 uses casing 437721 and impeller 438120. Like the AOT-4, transmission-head selection depends on whether the pump is a Type A or Type B configuration.
Monarch AOT-6 Repair Parts
The Monarch AOT-6 uses casing 437732 and impeller 438150. Its transmission-head part numbers differ from the AOT-4 and AOT-5, so confirm the AOT-6 type before ordering.
Frequently Asked Questions
Which Monarch pump models are covered on this page?
This page covers repair parts for the Monarch Industries AOT-4, AOT-5, and AOT-6 frame-mounted end suction pump series.
What information should I provide when ordering Monarch AOT parts?
Provide the pump model, pump type when applicable, part code number, part description, and quantity required. Photographs can also help when pump identification is incomplete.
Are all AOT-4, AOT-5, and AOT-6 parts the same?
No. Some components are used across multiple AOT models, while casings, impellers, transmission heads, gaskets, and other components can differ by pump model or type. Use the repair-parts table to identify the correct Monarch part.
What shaft assembly does the Monarch AOT Series use?
The parts information provided lists shaft assembly 438450 for Type A and 438451 for Type B. Confirm the pump type before ordering.
What seal is listed for the Monarch AOT Series?
The repair-parts information lists part number 240250, described as a 5/8 I.D. Type 6 seal, for the AOT models covered here.
Which Monarch AOT parts are suggested to keep in stock?
The supplied parts list marks the aluminum washer 175500, gaskets 193900 and 193910, and seal 240250 as suggested stock items.