Generac Power Systems QT 5.4L User Manual

ENGINE COOLANT
Check coolant level in coolant recovery bottle. See the
“Specifications” section.
• Add recommended coolant mixture as necessary.
• Periodically remove radiator pressure cap to make
sure the coolant recovery system is functioning
properly. Coolant should be at bottom of radiator
filler neck. If coolant level is low, inspect gasket in
radiator pressure cap. Replace cap, if necessary.
To have pressure cap tested, contact an Authorized
Service Dealer. Inspect cooling system and coolant
recovery system for leaks.
MAINTENANCE OWNER/
OPERATOR CAN PERFORM
CHECK ENGINE OIL LEVEL
Refer to the “Checking Fluid Levels” section.
CHECK BATTERY
• Check battery fluid level each week as outlined
under “Check Fluid Levels”.
• Check battery cables for condition, tightness, cor-
rosion or damage. Clean, tighten or replace as
necessary.
EXERCISE SYSTEM
Start the generator engine at least once every seven
days and let it run at least 20 minutes. See the
“Weekly Exercise Cycle” section.
INSPECT COOLING SYSTEM
• Inspect engine cooling system at least once each
month.
• Check hoses for damage, deterioration, leaks, etc.
Correct any discrepancies found.
• Check hose clamps for tightness.
CHECK ENGINE COOLANT LEVEL
See the “Checking Fluid Levels” section.
PERFORM VISUAL INSPECTION
Complete a thorough visual inspection of the entire
engine-generator monthly. Look for obvious damage,
loose, missing or corroded nuts, bolts and other fas-
teners. Look for fuel, oil or coolant leaks.
INSPECT EXHAUST SYSTEM
Inspect the exhaust system at least once every three
months. Check all exhaust system pipes, mufflers,
clamps, etc. for condition, tightness, leaks, security,
damage.
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CHECK FAN BELT
• Inspect fan belts every three months. Replace any
damaged, deteriorated, worn or otherwise defec-
tive belt.
• Check fan belt tension. Thumb pressure, exerted
midway between pulleys, should deflect about 3/8
to 5/8 inch. Adjust belt tension as required.
INSPECT ENGINE GOVERNOR
Visually inspect electronic governor.
DANGER

Do not attempt to adjust the governor. Only
qualified service facilities should adjust the
governor. Excessively high operating speeds
are dangerous and increase the risk of personal
injury. Low speeds impose a heavy load on the
engine when adequate engine power is not
available and may shorten engine life. Correct
rated frequency and voltage are supplied only
at the proper governed speed. Some connected
electrical load devices may be damaged by incor-
rect frequency and/or voltage. Only qualified
service technicians should adjust the governed
speed.
CHANGING ENGINE OIL
Refer to maintenance performed by authorized ser-
vice facilities for engine oil and filter change frequen-
cies.
Drain the oil while the engine is still warm from run-
ning. This means warm up the engine, shut it down
and drain immediately as follows:
1. Remove OIL DRAIN HOSE from its retaining
clip.
2. Loosen and remove OIL DRAIN HOSE CAP. Drain
oil completely into suitable container.
3. When all oil has drained, install and tighten OIL
DRAIN HOSE CAP, and re-install into its retaining
clip.
4. Turn OIL FILTER (Figure 10.2) counterclockwise
and remove. Dispose of old filter.
5. Apply light coating of new engine oil to seal of new
oil filter.-Install FILTER and tighten by hand only.
DO NOT OVERTIGHTEN.
6. Remove OIL FILL CAP. Add recommended oil (see
SPECIFICATIONS). DO NOT FILL ABOVE THE
DIPSTICK “FULL” MARK. Crankcase oil capacity
is listed in the “Specifications”.

After refilling the crankcase with oil, always
check oil level on dipstick. NEVER OPERATE
ENGINE WITH OIL BELOW THE DIPSTICK “ADD”
MARK.
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Standby Generator Sets
Maintenance
10-2
Maint003 Rev. 0 08/05

Generac Power Systems QT 5.4L Specifications

General

Voltage	120/240 V
Displacement	5.4L
Fuel Type	Natural Gas / Liquid Propane
Engine	Generac
Engine Type	4-Cycle

Summary

Safety Rules

General Hazards

General safety precautions and responsibilities for operators and technicians.

Electrical Hazards

Warnings about high voltages, shock prevention, and proper grounding.

Fire Hazards

Precautions related to fire prevention, including extinguisher use.

Explosion Hazards

Safety measures to prevent explosive gas buildup and fuel handling.

Introduction

Read This Manual Thoroughly

Emphasizes understanding the manual before operation.

Operation and Maintenance

Operator's responsibility for safe use and timely maintenance.

How to Obtain Service

Guidance on contacting authorized dealers for service and parts.

Identification Record

Data Label

Locates and describes the unit's data label information.

Identification Code

Explains how to interpret the generator's identification code.

Voltage Codes

Lists and defines the voltage codes used in identification.

Groups and Assembly Numbers

Explains how to find assembly numbers for drawings.

Equipment Description

Engine Oil Recommendations

Details recommended engine oil types and grades by temperature.

Coolant Recommendations

Advises on correct coolant mixture and handling precautions.

Engine Protective Devices

Coolant Temperature Sensing

Describes coolant temp monitoring and shutdown trigger.

Low Coolant Level

Explains the low coolant sensor and shutdown mechanism.

Oil Pressure Sensing

Details the oil pressure sensor and shutdown mechanism.

Overcrank Shutdown

Describes shutdown for failed starting attempts.

Overspeed Shutdown

Explains engine shutdown due to excessive speed.

RPM Sensor Loss Shutdown

Covers shutdown due to loss of engine speed signal.

DC Fuse

Locates and explains the control panel DC fuse.

Fuel Systems

Fuel Requirements

Specifies fuel types, Btu content, and pressure requirements.

Natural Gas Fuel System

Details requirements for natural gas fuel.

Propane Vapor Withdrawal Fuel System

Explains vapor withdrawal systems and limitations.

LP Fuel System

Describes liquid propane systems and vaporizer use.

Specifications

Generator

Lists technical specifications for the generator.

Engine

Lists technical specifications for the engine.

Engine Lubrication System

Details oil pump, filter, and capacity.

Cooling System

Lists cooling system parameters like pump, fan, capacity, and temps.

Fuel System

Specifies fuel type, carburetor, regulator, and pressure.

Electrical System

Details battery charger, voltage regulator, and system voltage.

Installation

Preparation Before Start-Up

General steps to prepare the generator before initial operation.

Transfer Switch

Requirements and considerations for installing a transfer switch.

Fuel System

Ensures correct fuel supply, pressure, purging, and leak testing.

Generator Set Lubrication

Checks and fills engine oil and gearbox oil.

Prior to Initial Start-Up

Crucial pre-start checks for engine fluids and preparation.

Engine Coolant

Verifies proper coolant filling and system integrity.

Belt Tension

Checks fan belt tension and condition.

Electrical System

Ensures proper grounding, battery charge, and connections.

Initial Inspection for QT Genset Startup

Checklist of items to inspect before initial startup.

Operation

Generator Control and Operation

Refers to the control panel manual for detailed operation.

Operating Unit with Manual Transfer Switch

Procedure for manual transfer switch operation.

Engine Start-up and Transfer

Steps for starting the engine and transferring load manually.

Retransfer and Shutdown

Procedure to transfer load back to utility and shut down the generator.

Operating Unit with Automatic Transfer Switch

Notes on operating with an automatic transfer switch.

Maintenance

Maintenance Performed by Authorized Service Facilities

Lists maintenance tasks for authorized service.

Cooling System

Emphasizes keeping air intake/outlets clear for proper cooling.

Checking Fluid Levels

General guidance on checking engine oil and battery fluid.

Check Engine Oil

Detailed steps for checking engine oil level.

Battery Fluid

Instructions for checking battery electrolyte level.

Service Schedule

Service Maintenance Interval Information

Explains the different service levels and intervals.

Troubleshooting Guide

Notes

Warranty