1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Gladiator 24V Brushless Alternator. Designed for durability and performance, this alternator is compatible with a wide range of agricultural and industrial applications from manufacturers such as Fiat-Allis, Allis Chalmers, Cat, Clark, Euclid, and IHC. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.
The Gladiator 24V Brushless Alternator is engineered to meet or exceed OEM specifications, offering reliable power generation for your equipment. It features a 24 Volt, 60 Amp negative ground system and is 100% computer load tested for reliability.
2. Product Features
- Voltage: 24 Volt
- Amperage: 60 Amp
- Ground Type: Negative Ground
- Meets or Exceeds OEM Specifications
- One Year Warranty
- 100% Computer Load Tested for Reliability
3. Compatibility Information
This Gladiator 24V Brushless Alternator is designed as a replacement for various models across several brands. Please verify your equipment's specifications and existing part numbers against the list below for compatibility.
Compatible Applications:
- Allis Chalmers:
- Crawlers: HD-16, 16DD, 16DP, 16PS (16000 Dsl 1969-1973), HD-21 (21000 Dsl 1971-1973), HD-6 (6000 Dsl 1970-1973), 945 (25000 Dsl 1973-1979)
- Med/Heavy Truck: 25000 Dsl Eng (1975-1978)
- Power Unit: 11000 Dsl Eng (1975-1981), 21000 Dsl Eng (1972-1978), 6138, 685 Dsl Eng (1979-1986)
- Scraper: 260B, 261B (25000 Dsl 1973)
- Clark:
- Dozer: 280 (Cummins NTA-855C 1979-1980), 280 IIIA (Cummins NTA-855C 1975-1978), 380 IIIA (Cummins KTA-1150 1975-1978), 380 IIIA (DD 16V-71N 1975-1978), 380C III (Cummins V-1710C 1973-1974)
- Tractor Shovel: 125 (DD 6V-71 Dsl 1973-1977), 125B-125C (Cummins VT-555 1973-1980), 275 IV (Cummins NTA-855C 1971-1974), 675 (Cummins VTA-1710C 1970-1972)
- Cummins Engine Med Duty:
- 855 Series (10.0L, 14.0L Eng 1983-1985), K Series (1983-1990), L Series (10.0L, 14.0L Eng 1983-1990), V Series (18.9L Eng 1983-1985)
- Euclid:
- Tractor: 206LDT (Cummins NTA-1710 1969-1972), 207LDT (DD 16V-71 Dsl 1969-1972), 208LDT (Cummins NTA-1710 1969-1972)
- Truck Unit: 201LDT (DD 16V-71 Dsl 1969-1972), 201TD (DD 12V-71 Dsl 1969-1971), 201XD (12V-149T Dsl 1971), 203FD (DD 6-71 Dsl 1971), 301ND (DD 16V-71 Dsl 1971), 302ND (Cummins NTA-1710 1971), R-35 (DD 12V-71 Dsl 1969-1970)
- Fiat-Allis:
- Crawlers: 945B (25000 Dsl 1974-1979)
- Grader: 100C, 150C, 200C (11000 Dsl 1974-1979)
- Tractor: HD-16DD / PS (16000 Diesel 1974-1978), HD-21 (21000 Diesel 1974-1978), HD-31 (Cummins KT-1150 1976-1979), HD-41 (Cummins VT-1710 1978-1979)
- Tractor Scraper: 260B, 261B (25000 Dsl 1974-1979)
- Wheel Loader: 12G (11000 Dsl 1974-1978), 645B (3500), 745B (11000), 945 (25000 Dsl 1974-1979)
- IHC:
- Loader: TD-250, 250C (DT-573B Dsl 1970-1974)
- Payloader: 560 (DTI-817C Dsl 1975-1982), 560B (DTI-817C, KT-1150C Dsl 1980-1985), H-400C (Cummins VT-1710C 1975-1979)
- Tractor: TD-25B (DT-817 Dsl 1968-1971), TD-25C (DT-817 Dsl 1968-1976)
- Windrower: 175 (DT-407 Dsl 1971-1974)
- Cat:
- Track Loader: 941B (Cat. 3304 1969-1983), 943 (Cat. 3204 1980-1992), 951C, 955L (Cat 3304 1971-1981), 953B (Cat. 3116 1993-1996), 973 (Cat. 3306 1982-1993), 983 (D-343 Dsl 1969-1979)
Replaces Part Numbers:
This alternator replaces numerous OEM and aftermarket part numbers, including but not limited to: 1117236, 5S9088, 9S6693, 100-5047, 203176, 203179, 1117248, 1117250, 1117253, 1117258, 10459006, 10459064, 3603848RX, R0459137, E820112X, 70699268, 672901C91, V1114265, 1005047, 321-602, 321-698, 101-25201, 13-4056, 13-4057, 90-01-3030N, 1117254, 10459245, SE501345, 321-752, A-1193, 90-01-3158, 1117229, 1117243, 90-01-3032, 1117282, 19010001, 19010006, 19010020, 19010023, 10459061, 10459100, 10459137, 0R3614, 1125041, 3E7578, 3675212RX, 0R5206, 101-26201, 90-01-4171N, 10459072, 0R3667.
4. Setup and Installation
Proper installation is crucial for the performance and longevity of your alternator. If you are unsure about any step, it is recommended to consult a qualified mechanic or technician.
Safety Precautions:
- Always disconnect the vehicle's battery (negative terminal first) before beginning any electrical work.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure the vehicle is stable and secured before working underneath it.
Installation Steps (General Guide):
- Preparation: Disconnect the battery. Locate the existing alternator.
- Remove Old Alternator: Loosen and remove the serpentine belt. Disconnect all electrical connections (battery cable, field wire, ground wire). Unbolt the old alternator from its mounting brackets.
- Inspect Components: Check the condition of the serpentine belt, tensioner, and pulleys. Replace any worn components.
- Install New Alternator: Position the new Gladiator alternator into the mounting brackets. Secure it with bolts, but do not fully tighten yet.
- Connect Electrical Wires: Reconnect the electrical wires to the new alternator. Ensure connections are clean and secure. The main battery cable connects to the large output stud, and smaller wires connect to the regulator terminals.
- Install Belt: Route the serpentine belt correctly around all pulleys. Use the tensioner to apply the correct tension.
- Tighten Mounts: Fully tighten the alternator mounting bolts.
- Reconnect Battery: Reconnect the vehicle's battery (positive terminal first, then negative).
- Test System: Start the engine and check the charging system. Verify that the battery warning light is off and that the alternator is producing the correct voltage (typically 13.8-14.8V).

Image 1: Main view of the Gladiator 24V Brushless Alternator. This image shows the overall design and primary connections of the unit.

Image 2: Side view of the alternator, highlighting the pulley shaft where the serpentine belt connects.
5. Operating Instructions
Once installed, the alternator operates automatically to maintain the vehicle's electrical system and recharge the battery. No manual intervention is typically required during normal operation.
- The alternator begins charging as soon as the engine starts.
- It converts mechanical energy from the engine's crankshaft (via the serpentine belt) into electrical energy.
- The internal voltage regulator controls the output to ensure a stable voltage for the electrical system and proper battery charging.
- Monitor your vehicle's dashboard for any battery warning lights, which may indicate a charging system issue.
6. Maintenance
Regular inspection and maintenance can extend the life of your alternator and prevent unexpected failures.
- Belt Inspection: Periodically check the serpentine belt for cracks, fraying, or excessive wear. Ensure it has proper tension. A loose belt can cause insufficient charging.
- Wiring Connections: Inspect all electrical connections to the alternator for corrosion or looseness. Clean and tighten as necessary.
- Battery Health: A weak or failing battery can put extra strain on the alternator. Ensure your battery is in good condition.
- Cleanliness: Keep the alternator free from excessive dirt, oil, and debris, which can hinder cooling and operation.

Image 3: Rear view of the alternator, showing the electrical connection points. Ensure these are clean and securely fastened.
7. Troubleshooting
If you experience issues with your charging system, consider the following common problems and solutions:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Battery warning light on | Loose or worn belt, faulty alternator, wiring issue, dead battery | Check belt tension and condition. Inspect wiring. Test alternator output. Test battery. |
| Dim headlights or interior lights | Low alternator output, weak battery | Check alternator voltage output. Test battery charge and condition. |
| Battery not charging | Alternator failure, open circuit in charging system, blown fuse | Verify all connections. Check fuses. Test alternator. |
| Squealing noise from engine bay | Loose or worn serpentine belt | Inspect and adjust belt tension or replace belt. |
If troubleshooting steps do not resolve the issue, it is recommended to seek professional assistance.
8. Specifications
| Attribute | Detail |
|---|---|
| Brand | Gladiator |
| Voltage | 24 Volts |
| Amperage | 60 Amps |
| Ground Type | Negative Ground |
| Item Weight | 28 pounds |
| Product Dimensions | 12.5 x 8.5 x 7.5 inches |
| Manufacturer Part Numbers | 1117226, 1117230, 1117236, 1117239, 3T1888 |
| Replaces OEM Part Numbers | 1117236, 5S9088, 9S6693, 100-5047, 203176, 203179, 1117248, 1117250, 1117253, 1117258, 10459006, 10459064, 3603848RX, R0459137, E820112X, 70699268, 672901C91, V1114265, 1005047, 321-602, 321-698, 101-25201, 13-4056, 13-4057, 90-01-3030N, 1117254, 10459245, SE501345, 321-752, A-1193, 90-01-3158, 1117229, 1117243, 90-01-3032, 1117282, 19010001, 19010006, 19010020, 19010023, 10459061, 10459100, 10459137, 0R3614, 1125041, 3E7578, 3675212RX, 0R5206, 101-26201, 90-01-4171N, 10459072, 0R3667 |
9. Warranty and Support
This Gladiator 24V Brushless Alternator comes with a One Year Warranty from the date of purchase, covering defects in materials and workmanship. For warranty claims or technical support, please contact the seller or manufacturer directly with your purchase details.
For additional product views:

Image 4: Front view of the alternator, showing the pulley and mounting points.

Image 5: Side profile of the alternator, illustrating its compact design.





