Inspection Guide

Used Bucket Truck Inspection Checklist What To Check
Before You Buy

A used bucket truck is a major investment and a safety critical piece of equipment. Use this checklist to evaluate any unit before signing. Know what is normal wear, what needs repair, and what is an absolute deal breaker.

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In This Guide
Before You InspectChassis And DrivetrainHydraulic SystemBoom And Aerial DeviceBucket And ControlsOutriggers And StabilizersElectrical And PTOCertificationsRed FlagsAfter The Inspection

Bucket trucks work hard. By the time a unit hits the used market, it may have tens of thousands of operating hours on the aerial device, far more than the chassis mileage suggests. A thorough physical inspection, not just a test drive, is non negotiable. Work through each area below in order.

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Before You Inspect

Bring a flashlight, a notepad, and a mechanic or aerial device technician if possible. Plan for at least 2 to 3 hours on site. Request that the seller have the truck warmed up and ready to operate when you arrive.

1

Before The In Person Inspection

Do this research remotely before you make the trip. It can save time and reveal issues the seller may not have disclosed.

Remote Pre Check
✓Request VIN and run a Carfax or commercial vehicle history report.Do First
✓Ask for photos of the boom, bucket, outriggers, and undercarriage.
✓Confirm the make and model of the aerial device, not just the chassis.
✓Ask for the most recent annual inspection certificate.
✓Ask for the maintenance log and how often the truck was serviced.
✓Confirm working height, side reach, and load rating match the listing.
✓Verify the CDL requirement, meaning GVWR, for your drivers.
✓Ask if the truck has been in an accident or had a boom incident.
✓Ask if the insulation rating, if applicable, is current.
✓Confirm all controls are functional before traveling to inspect.
2

Chassis And Drivetrain

The aerial device can be refurbished or replaced. The chassis is harder and more expensive to fix. Evaluate it as you would any used commercial truck.

Chassis Inspection
✓Walk the frame rails and look for cracks, welds, or bends.Critical
✓Check cab and body for rust, especially door sills and cab corners.
✓Look under the cab for rust on the subframe.
✓Inspect tires for tread depth, sidewall cracking, and uneven wear.
✓Check brake condition, including pads, drums or rotors, and air system pressure.
✓Start the engine cold and listen for knocking or excessive smoke.
✓Check for oil leaks at the engine, transmission, and differentials.
✓Test all lights, including headlights, turn signals, brake lights, and work lights.
✓Check the transmission for smooth shifts with no slipping or hard engagement.
✓Inspect the exhaust for leaks or excessive corrosion.
✓Verify the mileage on the odometer matches service records.
✓Check battery condition and the starting system.
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Watch For Rust In The South

Florida trucks see less road salt corrosion than northern units but are exposed to humidity and coastal air. Check inside frame channels and under body panels for rust that is not visible at first glance.

3

Hydraulic System

The hydraulic system powers the boom, outriggers, and on some units, the rotation. Hydraulic repairs can be expensive, so inspect carefully.

Hydraulic System
✓Check hydraulic fluid level and condition, confirming it is clean and not milky.High Priority
✓Inspect the hydraulic reservoir for cracks, corrosion, or damage.Critical
✓Look for leaks at all hose connections and fittings.
✓Inspect all hydraulic hoses for cracking, fraying, or abrasion.
✓Operate all boom functions and confirm cylinders move smoothly with no jerking.
✓Hold the boom extended under load and watch for drift, meaning slow descent.
✓Check the hydraulic pump for noise or vibration during operation.Critical
✓Inspect all hydraulic cylinders for scoring or pitting on the rods.
✓Test outrigger cylinders for leaks when extended under weight.
✓Verify all hydraulic control valves respond correctly.
4

Boom And Aerial Device

The boom is the heart of the unit. Inspect it thoroughly both at rest and through full range of motion. This section takes the most time, so do not rush it.

Boom Structure
✓Visually inspect all boom sections for cracks, bends, or repairs.High Priority
✓Look for welded patches or unauthorized repairs on structural members.Critical
✓Check all pivot points and pins for wear, looseness, or corrosion.Critical
✓Inspect the turntable and rotation bearing for play or grinding.
✓Operate rotation through a full 360 degree turn and confirm it is smooth and controlled.
✓Check all cable sheaves and rollers on telescoping sections.
✓Look for wear pads in good condition on telescoping sections.
✓Inspect the jib, if equipped, for cracks and proper operation.
✓Test upper and lower controls independently.
✓Verify the emergency or manual lowering system is present and functional.
✓Check the boom rest or travel lock, which must engage securely for road travel.Critical
✓Look for any missing safety decals or load capacity charts.
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Operate Through Full Range

Do not just extend the boom halfway. Run it through maximum elevation, maximum extension, and full rotation in both directions. Problems that do not appear at 50 percent travel often surface at the limits of range.

5

Bucket And Controls

The bucket is where your crew works. Structural integrity and control reliability are safety essentials, not optional checks.

Bucket And Upper Controls
✓Inspect the bucket liner and shell for cracks, holes, or repairs.Critical
✓Check bucket mounting hardware and confirm all bolts are present and tight.
✓Test the bucket leveling system, which should stay level through the boom range.
✓Test all upper controls, checking every function from inside the bucket.
✓Verify the upper and lower control override works correctly.Critical
✓Check safety bar, gate, and footrest integrity.
✓Confirm the liner capacity label is present and legible.
✓Test bucket rotation, if equipped, for smooth operation with no binding.
✓Check the tool tray and attachment points for damage.
✓Verify the communication system between the bucket and ground, if equipped.
6

Outriggers And Stabilizers

Outriggers are what keep the truck stable when the boom is extended. Any issue here is a safety issue.

Outriggers
✓Deploy all outriggers fully and check for smooth, equal extension.Safety Critical
✓Inspect outrigger pads to confirm they are present, undamaged, and the correct size.Critical
✓Look for hydraulic leaks at outrigger cylinders when extended.
✓Check outrigger float locks and pins for proper engagement.
✓Inspect outrigger beams for bends, cracks, or weld repairs.
✓Verify outrigger indicator lights or level indicators function correctly.Critical
✓Check that the interlock prevents boom operation without outriggers set.
✓Inspect outrigger storage latches to confirm they hold securely during travel.Critical
7

Electrical System And PTO

Electrical issues are common in aging commercial equipment and can range from minor nuisances to serious hazards. The power take off, or PTO, drives the hydraulic pump and must engage cleanly.

Electrical And PTO
✓Test PTO engagement, which should engage smoothly without grinding.
✓Listen for unusual noises when the PTO is engaged under hydraulic load.
✓Inspect all wiring harnesses for chafing, exposed wires, or repairs.
✓Check work lights, confirming both upper boom and lower cab lights function.
✓Test the hour meter or PTO meter and verify the reading matches service records.
✓Inspect all ground straps and bonding connections.
✓Check any auxiliary outlets or power ports in the bucket.
✓Test warning lights and alarms for overload, tilt, and outriggers.
✓Verify the aerial device has a working load moment indicator, if equipped.
✓Check the condition of all control switches, with no missing or taped over controls.
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Insulated Booms, Verify The Dielectric Rating

If you are buying an insulated, dielectric, bucket truck for utility line work, confirm that the insulation has been tested within the required interval, typically annually. Look for a test sticker on the boom or in the documents. An expired test means the truck cannot legally be used on energized lines until retested, so budget for that cost.

8

Certifications And Documentation

Paper matters as much as physical condition. Missing documentation can prevent you from using the truck legally and creates liability exposure.

Documents To Request
✓Current annual inspection certificate, meeting ANSI A92.2 and OSHA standards.Required
✓Dielectric test certificate for insulated units.Critical
✓Operator's manual for the aerial device.Critical
✓Load chart or capacity chart, which should be posted on the unit.
✓Service and maintenance records.
✓Clear title with no liens.
✓Manufacturer's serial number plate on the aerial device.Critical
✓Vehicle registration and prior registration history.
✓Any refurbishment records showing what was replaced and when.
✓Warranty documentation, if applicable.
9

Red Flags That Should Kill The Deal

Some issues are repairable and negotiating points. These are not. Walk away if you find any of the following.

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Structural cracks or unauthorized welds on the boomNo repair makes a cracked boom safe.
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Boom drift under loadThis indicates failed hydraulic seals or control valves, a safety hazard aloft.
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Missing or bypassed safety interlocksIncluding outrigger interlocks and overload protection.
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Cracked or compromised bucket linerEspecially on insulated units where the bucket is a dielectric barrier.
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No clear title or liens on the unitYou could lose the truck entirely.
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No annual inspection certificate and the seller will not provide oneThe truck may be out of compliance and unusable.
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Frame rail damage, cracks, or prior frame repairsStructural integrity of the chassis is non negotiable.
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Seller refuses to allow a third party inspectionLegitimate sellers have nothing to hide.
10

After The Inspection What To Do Next

If The Truck Passes

Document any minor issues you found and use them to negotiate price or require correction before closing. Confirm the annual inspection is current, secure financing if needed, and get everything in writing, including any representations the seller made about the condition of the unit.

If You Found Problems

Minor issues such as worn tires, a minor hydraulic hose replacement, or fresh fluids needed can be priced and deducted from the offer. Major structural, certification, or title issues are generally not worth pursuing unless the price fully reflects the cost of bringing the unit into compliance.

Consider An Extended Warranty

For units that pass inspection but will see heavy use, an extended warranty provides protection against unexpected major repair costs. Monster Equipment offers NTP warranty coverage on eligible trucks, with roadside assistance, low deductibles, and substantial coverage caps.

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Buying From A Reputable Dealer Simplifies This

When you buy from a specialist dealer like Monster Equipment, many of these inspection steps have already been done on the units we source and prepare ourselves. Monster Equipment refurbishes much of its inventory in house, maintains documentation, and stands behind what we sell, which is worth accounting for when comparing a dealer price to a private party listing with no history.

Shop Refurbished Utility Bucket Trucks And Sign Trucks

Monster Equipment sources and prepares much of its inventory in house, backed by specialists with over twenty years of combined industry experience. Browse current listings of bucket trucks, sign trucks, sign cranes, and more, or call our team, and we will match you to the right unit.

View Bucket Truck InventoryCall (941) 377 7225