Generac 005222-0 / QT 3.9L 40kW — Preparation for Start-Up / Start-Up Checklist
Installation · Generator set
For the Generac 005222-0 / QT 3.9L 40kW, from the Generac owner's manual.
Applies to: Generac QT 3.9L 40kW, Generac V-type engine
Before you start
- Do not crank the engine continuously for longer than 30 seconds or the starter motor may be damaged.
Procedure
- Ensure the 120VAC circuit breaker to the battery charger is open.
- Remove the 15 Amp ATO fuse from the control panel (H-100 and R-100: lower left-hand corner of control box).
- Connect the battery cables to the battery; attach negative cable last.
- Close the 120VAC circuit breaker to the battery charger.
- Measure the voltage at the battery before and after the charger is turned on.
- Verify all AC electrical connections are tight at the circuit breaker and transfer switch.
- Visually inspect entire area for loose paper, plastic wrappings, leaves, etc.
- Check all hose clamps and fittings for leaks or damage.
- Check all electrical plugs; ensure each is seated correctly.
- Verify the AUTO/OFF/MANUAL switch is in OFF position.
- Open the valve to the engine fuel line and bleed the fuel system of air.
- Open the generator main line circuit breaker.
- Connect a manometer to the gas line and record static pressure.
- Insert the fuse into the control panel and move the AUTO/OFF/MANUAL switch to MANUAL; engine should crank and start.
Tools required
- manometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel static pressure must be as listed in the Specifications
Full service-parts list: Generac QT 3.9L 40kW →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.