Forklift operating condition and maintenance study guide
Paragraphs (p) and (q) of 29 CFR 1910.178, OSHA's powered industrial truck standard for general industry, cover the operation of the truck and the maintenance of industrial trucks. This guide sets out what the federal rule text states on taking unsafe trucks out of service, fueling, fuel leaks and open flames, who makes repairs and where, replacement parts, alterations and conversion to LP gas, the examination before trucks are placed in service, mufflers, and cleaning. These two paragraphs are short, so this guide has fewer points than others. Under paragraph (l) of the standard, the employer must make sure its operators are trained and evaluated and must certify that they were; goraedu does none of that, and this is not a certification or operator evaluation. Your State may run its own OSHA-approved plan with its own rules, so check them too. Every point links to the regulation and quotes its exact words.
Removing unsafe trucks from service
Under 1910.178(p)(1), if at any time a powered industrial truck is found to be in need of repair, defective, or in any way unsafe, it shall be taken out of service until it has been restored to safe operating condition.
“If at any time a powered industrial truck is found to be in need of repair, defective, or in any way unsafe, the truck shall be taken out of service until it has been restored to safe operating condition.”
Under 1910.178(q)(1), any power-operated industrial truck not in safe operating condition shall be removed from service.
“Any power-operated industrial truck not in safe operating condition shall be removed from service.”
A vehicle that emits hazardous sparks or flames from the exhaust system shall immediately be removed from service. It is not returned to service until the cause for the emission of such sparks and flames has been eliminated.
“that emits hazardous sparks or flames from the exhaust system shall immediately be removed from service, and not returned to service until the cause for the emission of such sparks and flames has been eliminated.”
When the temperature of any part of any truck is found to be in excess of its normal operating temperature, thus creating a hazardous condition, the vehicle shall be removed from service.
“When the temperature of any part of any truck is found to be in excess of its normal operating temperature, thus creating a hazardous condition, the vehicle shall be removed from service”
An overheated vehicle is not returned to service until the cause for such overheating has been eliminated.
“not returned to service until the cause for such overheating has been eliminated.”
Fueling, fuel leaks and open flames
Fuel tanks shall not be filled while the engine is running.
“Fuel tanks shall not be filled while the engine is running.”
Spillage shall be avoided.
“Fuel tanks shall not be filled while the engine is running. Spillage shall be avoided.”
Spillage of oil or fuel shall be carefully washed away or completely evaporated, and the fuel tank cap replaced, before the engine is restarted.
“Spillage of oil or fuel shall be carefully washed away or completely evaporated and the fuel tank cap replaced before restarting engine.”
No truck shall be operated with a leak in the fuel system until the leak has been corrected.
“No truck shall be operated with a leak in the fuel system until the leak has been corrected.”
Open flames shall not be used for checking the electrolyte level in storage batteries or the gasoline level in fuel tanks.
“Open flames shall not be used for checking electrolyte level in storage batteries or gasoline level in fuel tanks.”
Repairs: who and where
All repairs shall be made by authorized personnel.
“All repairs shall be made by authorized personnel.”
No repairs shall be made in Class I, II, and III locations.
“No repairs shall be made in Class I, II, and III locations.”
Repairs to the fuel and ignition systems of industrial trucks which involve fire hazards shall be conducted only in locations designated for such repairs.
“Those repairs to the fuel and ignition systems of industrial trucks which involve fire hazards shall be conducted only in locations designated for such repairs.”
Trucks in need of repairs to the electrical system shall have the battery disconnected prior to such repairs.
“Trucks in need of repairs to the electrical system shall have the battery disconnected prior to such repairs.”
Not covered here
The meaning of Class I, II and III locations is not set out in paragraphs (p) and (q) and is not described here. We only write what an official source states, so study these parts with your certifying program's materials.
Parts, alterations and LP conversion
Parts requiring replacement shall be replaced only by parts equivalent as to safety with those used in the original design.
“All parts of any such industrial truck requiring replacement shall be replaced only by parts equivalent as to safety with those used in the original design.”
Industrial trucks shall not be altered so that the relative positions of the various parts are different from what they were when originally received from the manufacturer.
“Industrial trucks shall not be altered so that the relative positions of the various parts are different from what they were when originally received from the manufacturer”
Nor shall they be altered by the addition of extra parts not provided by the manufacturer or by the elimination of any parts, except as provided in paragraph (q)(12).
“nor shall they be altered either by the addition of extra parts not provided by the manufacturer or by the elimination of any parts, except as provided in paragraph (q)(12) of this section.”
Additional counterweighting of fork trucks shall not be done unless approved by the truck manufacturer.
“Additional counterweighting of fork trucks shall not be done unless approved by the truck manufacturer.”
Under (q)(12), trucks originally approved for the use of gasoline for fuel may be converted to liquefied petroleum gas fuel, provided the complete conversion results in a truck which embodies the features specified for LP or LPS designated trucks.
“Industrial trucks originally approved for the use of gasoline for fuel may be converted to liquefied petroleum gas fuel provided the complete conversion results in a truck which embodies the features specified for LP or LPS designated trucks.”
Such conversion equipment shall be approved.
“Such conversion equipment shall be approved.”
The description of the component parts of the conversion system and the recommended method of installation on specific trucks are contained in the "Listed by Report."
“The description of the component parts of this conversion system and the recommended method of installation on specific trucks are contained in the “Listed by Report.””
Not covered here
The contents of the "Listed by Report" are not described here. We only write what an official source states, so study these parts with your certifying program's materials.
Examination before service
Industrial trucks shall be examined before being placed in service.
“Industrial trucks shall be examined before being placed in service”
A truck shall not be placed in service if the examination shows any condition adversely affecting the safety of the vehicle.
“shall not be placed in service if the examination shows any condition adversely affecting the safety of the vehicle.”
Such examination shall be made at least daily.
“Such examination shall be made at least daily.”
Where industrial trucks are used on a round-the-clock basis, they shall be examined after each shift.
“Where industrial trucks are used on a round-the-clock basis, they shall be examined after each shift.”
Defects, when found, shall be immediately reported and corrected.
“Defects when found shall be immediately reported and corrected.”
Not covered here
The rule text does not list the items to be examined; no checklist is given here. We only write what an official source states, so study these parts with your certifying program's materials.
Mufflers, cleaning and solvents
Water mufflers shall be filled daily or as frequently as is necessary to prevent depletion of the supply of water below 75 percent of the filled capacity.
“Water mufflers shall be filled daily or as frequently as is necessary to prevent depletion of the supply of water below 75 percent of the filled capacity.”
Vehicles with mufflers having screens or other parts that may become clogged shall not be operated while such screens or parts are clogged.
“Vehicles with mufflers having screens or other parts that may become clogged shall not be operated while such screens or parts are clogged.”
Industrial trucks shall be kept in a clean condition, free of lint, excess oil, and grease.
“Industrial trucks shall be kept in a clean condition, free of lint, excess oil, and grease.”
Noncombustible agents should be used for cleaning trucks (the rule says "should").
“Noncombustible agents should be used for cleaning trucks.”
Low flash point (below 100 °F.) solvents shall not be used.
“Low flash point (below 100 °F.) solvents shall not be used.”
High flash point (at or above 100 °F.) solvents may be used.
“High flash point (at or above 100 °F.) solvents may be used.”
Precautions regarding toxicity, ventilation, and fire hazard shall be consonant with the agent or solvent used.
“Precautions regarding toxicity, ventilation, and fire hazard shall be consonant with the agent or solvent used.”
Not covered here
Paragraph (q)(11) is reserved. We only write what an official source states, so study these parts with your certifying program's materials.
Sources
- eCFR: 29 CFR 1910.178, Powered industrial trucks (as of Nov 4, 2026)Checked November 6, 2026
Other Forklift operator study guides: Operator training and evaluation, Truck approval, types and designated locations, Fuel, batteries, lighting and loading docks, Truck operations, traveling and loading, Forklifts in construction