Service parts for the Guardian Liquid-cooled 40 kW Generator
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredElectrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 40 kW |
| Controller | Solid-state engine circuit board |
| Oil capacity | 4.25 L |
| Alternator | N/A (2-pole) |
| Voltage options | 120/240 V |
| Phase | single-phase |
| Rated current | 167 A |
| Circuit breaker | 200 A |
| Battery group | 27F |
| Battery cranking | 600 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
Maintenance & consumables
for the Generac 004373-2| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter | 0A4637 | Amazon eBay $49.95 NAPA $13.61 | ||
| Fuel filter | N/A | — | 100 hr | ||
| Oil filter | Oil Filter | 0A37970001 | Amazon eBay $16.00 NAPA $9.09 | ||
| Battery | Group 27F | 058665 | Amazon eBay | ||
| Belt | N/A | — | 3 hr | ||
| Oil | SAE 15W-40 | 4.5 quarts | 0A37970001 | 9 hr | Amazon eBay $16.00 NAPA $9.09 |
| Spark plug | 0.045 inch (1.1 mm) | — | 500 hr |
Common questions
What size generator is the Generac Guardian Liquid-cooled 40 kW Generator?
The Generac Guardian Liquid-cooled 40 kW Generator is rated 40 kW standby.
What engine is in the Generac Guardian Liquid-cooled 40 kW Generator?
The Generac Guardian Liquid-cooled 40 kW Generator is powered by the Generac 004373-2 engine.
What kind of fuel does the Generac Guardian Liquid-cooled 40 kW Generator run on?
The Generac Guardian Liquid-cooled 40 kW Generator runs on Diesel.
How much oil does the Generac Guardian Liquid-cooled 40 kW Generator take?
The Generac 004373-2 engine in the Generac Guardian Liquid-cooled 40 kW Generator has an oil capacity of 4.25 liters.
What voltages is the Generac Guardian Liquid-cooled 40 kW Generator available in?
The Generac Guardian Liquid-cooled 40 kW Generator is offered in 120/240 V, single-phase-phase.
What battery does the Generac Guardian Liquid-cooled 40 kW Generator use?
The Generac Guardian Liquid-cooled 40 kW Generator uses 1 battery, 12 V each, 600 CCA, group 27F, per the manufacturer specification sheet.
What alternator does the Generac Guardian Liquid-cooled 40 kW Generator use?
The Generac Guardian Liquid-cooled 40 kW Generator uses a N/A alternator. It has 2 poles.
What oil filter fits the Generac Guardian Liquid-cooled 40 kW Generator?
The Generac Guardian Liquid-cooled 40 kW Generator uses oil filter part number 0A37970001.
Which air filter part number does the Generac Guardian Liquid-cooled 40 kW Generator take?
The Generac Guardian Liquid-cooled 40 kW Generator uses air filter part number 0A4637.
Troubleshooting
4Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| The engine will not crank. | 1. Fuse blown 2. Loose, corroded or defective battery cables 3. Defective starter contactor 4. Defective starter motor 5. Dead Battery | 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace defective starter contactor. 4. Replace defective starter motor. 5. Charge or replace battery. |
| The engine cranks but will not start. | 1. Out of fuel 2. Defective fuel solenoid (FS) 3. Open #14 wire from engine control board 4. Defective spark plug(s) 5. Dirty/Blocked air filter | 1. Replenish fuel. 2. * 3. * 4. Clean, re-gap or replace plug(s). 5. Clean or replace as required. |
| The engine starts hard and runs rough. | 1. Air cleaner plugged or damaged 2. Defective spark plug(s) 3. Dirty/Blocked air filter | 1. Check, clean or replace air cleaner. 2. Clean, re-gap or replace plug(s). 3. Clean or replace as required. |
| The engine starts, but then shuts down. | 1. Engine oil level low 2. Defective low oil pressure switch 3. Defective high temperature switch 4. Defective control board 5. Low coolant | 1. Check oil and add oil as needed. 2. * 3. * 4. * 5. * |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
6| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 057522 | SENSOR COOLANT LEVEL | 1 | Sensor | Amazon eBay |
| 0A37970001 | FILTER OIL | 1 | Oil filter | Amazon eBay $16.00 NAPA $9.09 |
| 0A4637 | Air Cleaner | 1 | Air filter | Amazon eBay $49.95 NAPA $13.61 |
| 0D2244M | ASSY MAGPICKUP (3/8-24 MALE) | 1 | Sensor | Amazon eBay $127.65 FridayParts $18.08 |
| 058665 | BATTERY 12VDC 90-AH 27F | 1 | Service part / kit | Amazon eBay |
| 0A3852 | CASTING ADAPTOR | 1 | Service part / kit | Amazon |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 720.0 | 7.9 |
Available documents
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.