Boom Lift & Scissor Lift Repair
Mondak Equipment repairs and troubleshoots mobile elevating work platforms (MEWPs) including boom lifts, scissor lifts, vertical lifts, and other aerial equipment.
MEWP Repair for JLG, Genie, Skyjack, Snorkel & Other Aerial Equipment
When a boom lift or scissor lift quits working, sometimes you know exactly what failed.
Other times the machine will not drive, will not elevate, has an intermittent control problem, displays a fault code, or simply does not operate the way it should.
We work on the hydraulic, mechanical, electrical, electronic, and power systems that keep these machines operating.
Tell us what the machine is doing. We'll start there.
Brands We Work On
We work on aerial equipment from manufacturers including:
JLG
JLG is a major part of the aerial equipment we see.
We work on:
- Articulating boom lifts
- Telescopic boom lifts
- Electric scissor lifts
- Rough-terrain scissor lifts
- Vertical lifts
- Related JLG equipment
Genie
Including:
- Z-Series articulating boom lifts
- S-Series telescopic boom lifts
- GS-Series scissor lifts
- Electric and rough-terrain equipment
Skyjack
Including:
- SJIII and related electric scissor lifts
- Rough-terrain scissor lifts
- Articulating boom lifts
- Telescopic boom lifts
- Related Skyjack equipment
Snorkel
Including:
- Electric scissor lifts
- Rough-terrain scissor lifts
- Articulating boom lifts
- Telescopic boom lifts
- Vertical and personnel lifts
We also work on other makes and models.
If your machine is not listed, give us the manufacturer, model, and what it is doing.
Boom Lift Repair
Boom lifts combine mechanical structure, hydraulics, controls, drive systems, and safety circuits in one machine.
Mondak can troubleshoot and repair problems involving:
- Boom lift and telescope functions
- Articulating joints
- Hydraulic cylinders
- Hydraulic pumps and motors
- Valves and manifolds
- Rotation systems
- Platform leveling
- Drive and steering systems
- Pins and bushings
- Bearings
- Hydraulic hoses and hard lines
- Platform controls
- Ground controls
- Joysticks
- Sensors and switches
- Wiring and connectors
- Engines
- Electrical and electronic controls
Sometimes the boom problem is hydraulic.
Sometimes a sensor, interlock, electrical connection, or mechanical problem is preventing the hydraulic system from doing anything at all.
Scissor Lift Repair
Mondak also works on electric and engine-powered scissor lifts.
Common repair areas include:
- Lift cylinders
- Scissor assemblies
- Pins and bushings
- Wear pads and rollers
- Hydraulic pumps
- Drive motors
- Steering systems
- Hydraulic hoses
- Platform controls
- Ground controls
- Sensors and limit switches
- Battery systems
- Chargers
- Electric motors
- Wiring and connectors
- Controllers
A scissor lift that will not raise may have a hydraulic problem, but it could also be a control, electrical, battery, sensor, or mechanical issue.
We work through the machine instead of assuming the symptom identifies the failed part.
Electrical, Electronic & Control Problems
Modern MEWPs rely heavily on electronic controls.
A fault code can point us in the right direction, but it does not always mean the component named in the fault is bad.
Mondak can troubleshoot:
- Controllers
- Joysticks
- Sensors
- Limit switches
- Wiring
- Connectors
- Relays and contactors
- Solenoids
- Ground and platform controls
- Safety interlocks
- Communication problems
- Battery and charging systems
An intermittent connection, damaged wire, weak battery, or incorrect sensor input can create problems that look very different from the component actually causing them.
Hydraulic & Mechanical Repair
The electronics may control the machine, but the hydraulics and mechanical equipment still have to do the work.
Mondak can repair:
- Hydraulic cylinders
- Pumps
- Hydraulic motors
- Valves and manifolds
- Hoses and fittings
- Bearings
- Pins and bushings
- Pivot points
- Drive components
- Steering components
- Worn mechanical assemblies
If the machine suddenly requires more hydraulic pressure to perform the same function, we want to know why.
Something mechanical may be binding or worn.
Electric & Engine-Powered MEWPs
Mondak works on both electric and engine-powered aerial equipment.
Electric Equipment
Repair can include:
- Batteries
- Battery cables
- Chargers
- Electric motors
- Motor controllers
- Contactors
- Wiring
- Drive systems
- Hydraulic power units
A machine with weak batteries or poor electrical connections can create symptoms that look like a hydraulic or control problem.
Engine-Powered Equipment
We can also work through:
- Diesel and gasoline engine problems
- Engine controls
- Fuel systems
- Cooling systems
- Charging systems
- Hydraulic pump drives
- Electrical faults
The engine, hydraulic system, and controls all have to work together for the lift to perform correctly.
Sometimes You Already Know What Failed
Not every repair requires extensive troubleshooting.
You may already know the cylinder is leaking, the joystick is broken, the charger failed, a hose is damaged, or another component needs to be replaced.
Sometimes the bigger problem is finding the part or finding someone willing to work on an older machine.
Depending on the repair, Mondak can help with:
- Component sourcing
- Cross-referencing parts
- Hydraulic component repair
- Cylinder repair
- Wiring and electrical repair
- Machining
- Welding and fabrication
- Older or obsolete equipment
If the machine is worth repairing, we are willing to look at practical ways to keep it working.
Annual MEWP Inspections
Mondak also provides annual MEWP inspections for boom lifts, scissor lifts, and other mobile elevating work platforms.
Annual inspections are required no later than 13 months after the previous annual inspection, along with the applicable manufacturer inspection requirements.
If the inspection identifies a repair need, Mondak can help address it rather than simply handing you an inspection report.
Field & Shop Repair
Many MEWP problems can be diagnosed and repaired where the equipment is located.
Larger repairs, cylinder work, machining, fabrication, or more extensive mechanical work may make more sense in the Mondak shop.
We can help determine the practical approach based on the machine and the repair.
Boom Lift or Scissor Lift Giving You Trouble?
Whether you have a JLG, Genie, Skyjack, Snorkel, or another MEWP, give Mondak a call.
Tell us:
- Manufacturer
- Model
- Serial number if available
- Fault code if you have one
- What function is giving you trouble
- What has already been tried
You do not need to diagnose the machine before calling.
Tell us what it is doing. We'll start there.
Contact Mondak Equipment