Crane and diesel repair questions
Answers on crane repair, semi and diesel repair, and how to request service.
Getting service
What do you repair?
Cranes, boom trucks, semis and diesel equipment. See Crane Repair and Diesel & Semi Repair for more detail, then tell us what you have when you request service.
Where do you work?
We serve the Denver metro and the rest of Colorado. Tell us where the equipment is when you call or send a request.
What are your hours?
We're open 24 hours a day, 7 days a week. Call (720) 233-1081 or request service anytime.
How do I get a price?
Send a request or call. We'll call back with questions before quoting, and you approve the work before it starts.
What should I have ready?
Make, model, year if you know it, where the equipment is, what it's doing, and any fault codes or photos. Photos can be emailed to office@omnicranediesel.com after you send the request.
Crane repair
What crane equipment do you repair?
Truck-mounted cranes, boom trucks, knuckle-booms and service-truck cranes, including the hydraulics and controls that run them. Tell us the make, model and what's going wrong when you request service.
What should I have ready when I request service?
The equipment type, make and model, year if you know it, serial or unit number, where it is, whether it can move, what it's doing, and any fault codes.
Do you also work on the truck under the crane?
Diesel and semi truck repair is a separate service line. If the carrier, engine or brakes are part of the problem, say so on the request form or see Diesel & Semi Repair.
The PTO light is on but nothing moves. Where do we start?
Write down what you see: whether the PTO engaged, whether you hear the pump, and whether any function moves at idle or at higher RPM. Share the make, model and any fault codes so we can ask the right follow-up questions.
Why does the boom only work at high idle?
That often points to a supply or pump-drive problem, but other issues can look the same. Note whether every hydraulic function is slow or only the boom, and whether it started suddenly or got worse over time.
Outriggers won't set or won't release.
That can be a valve, hose, cylinder or control issue. Note whether you hear the pump, whether one side is affected or both, and whether the crane functions still work.
The remote works sometimes.
Intermittent remote problems can be the transmitter, receiver, wiring or a weak battery. Tell us whether the truck-side controls work when the remote does not.
The crane hums but won't lift.
That can be a motor, solenoid, hydraulic or mechanical bind. Note whether you hear the motor or pump, whether the winch or boom tries to move, and any recent work or impact.
Winch slips under load.
Slipping under load can be wear, adjustment or a hydraulic or brake issue, depending on the crane. Tell us when it started, about how much weight was on the hook, and whether it happens in both directions.
Rotation is jerky.
Jerky rotation can come from the turntable, a valve, a motor or low or contaminated oil. Note whether it happens through the full swing or only in one area, and whether other functions feel the same.
A cylinder drifts down when parked.
Drift can come from the cylinder, a holding valve or a control leak. Tell us which function moves, how fast it drifts, and whether it happens only when the engine is off.
Everything is slow when it's cold.
Cold, slow functions often involve oil viscosity, a bypassing pump or a relief valve, but those are starting points, not a diagnosis. Note the air temperature, how long it takes to warm up, and whether one function stays slow after the rest recover.
A control function stopped working after a hose was replaced.
A function that dropped out after hose work can be a crossed line, a fitting issue or air in the system. Tell us which hose was changed, which function failed, and whether anything else changed at the same time.
Diesel and semi repair
What diesel and truck work do you handle?
Engine, brakes and air, electrical and cooling work on semis, work trucks and diesel equipment. See the pages below, and tell us what the unit is doing when you request service.
What should I send so you can call back with a plan?
Make, model, year if you know it, serial or VIN, where the equipment is, whether it can move, what's going wrong, and any fault codes.
How do I get a price?
Send a request or call. We'll call back with questions before quoting, and you approve the work before it starts.
The truck won't start, or it starts hard.
No-start and hard-start problems can be fuel, electrical, air or a mechanical issue. Note whether it cranks, any warning lights, the last fault codes if you have them, and whether it died while running or sat and then would not start.
It won't build air, or I can hear a leak.
Write down whether the compressor runs, how high the pressure gets, and where you hear or feel a leak if you can. That helps us ask the right questions about brakes and air.
A warning light is on and the truck is derated or down.
If you can, jot down the fault codes and when the light came on. Send those with the unit number, location and whether the truck can still move.
It overheats or is losing coolant.
Note the temperature, whether there is a visible leak, whether the overflow tank is rising or falling, and when it started. Those details help us plan the next questions.
It runs rough or has no power.
Tell us whether it happens at idle, under load or both, any smoke or unusual noise, and any fault codes. Include the make, model and year if you know them.
There's a fuel or oil leak.
If you can do so safely, note where the leak appears, whether it shows up at idle or under load, and about how fast it drips or sprays. Do not crawl under a unit that is not supported.
The truck won't build or hold air.
Note how high the pressure gets, whether you hear a leak, and whether the dryer or compressor was recently worked on. That helps us narrow the follow-up questions.
Brakes feel weak or pull to one side.
Tell us whether it happens when the brakes are applied, going down a grade, or at low speed, and whether a warning light or buzzer is on.
The batteries keep going dead, or lights and gauges are acting up.
Electrical faults can be the batteries, charging system or wiring. Note whether it happens after a short sit or overnight, and any recent jump-starts or parts changes.