A crane-equipped service truck lives or dies by how well its power source matches the job. The two most
common setups on mechanics trucks and service bodies are a self-contained 12V electric-over-hydraulic crane
and a PTO-driven crane that pulls power directly off the truck’s transmission. Both lift heavy loads reliably,
but they get their hydraulic pressure very differently — and that difference matters when you’re speccing a
new service body or
Tiger crane
build at Star Truck Equipment in Wharton, TX.
How a 12V Hydraulic Crane Works
A 12V crane runs its own electric hydraulic pump off the truck’s battery, completely independent of the
engine or transmission. That means the crane can operate with the engine off, which is valuable for crews doing
quiet residential work or running the crane during a longer job without idling the truck. 12V cranes are
typically rated for lighter to mid-duty lifts — commonly up to a few thousand pounds at the hook depending on
boom extension — and they install without any driveline modification, which keeps upfit costs and lead time
down.
How a PTO-Driven Crane Works
A power take-off (PTO) crane taps directly into the transmission to drive a hydraulic pump, giving it access
to much higher continuous hydraulic flow and pressure than a battery-powered unit can produce. That translates
to higher lift capacities and faster cycle times on heavy, repetitive lifting — the kind of duty cycle you see
on oilfield service trucks, heavy equipment mechanics trucks, and crane bodies moving compressors, pump jacks
components, or engine blocks all day. The tradeoff is that the engine has to be running (and the transmission
in the correct gear/mode) whenever the crane is in use, and the PTO installation itself adds cost and
complexity to the upfit.
Which Crane Fits Your Trade?
- Light-duty utility and delivery work — a 12V crane covers most occasional lifts without the added driveline cost
- Heavy equipment and oilfield mechanics trucks — PTO cranes handle the higher capacities and duty cycles these jobs demand
- Crews doing quiet or engine-off lifts — 12V systems don’t require the truck to be running
- High-frequency, heavy daily lifting — PTO systems cycle faster and sustain pressure better under repeated use
- Budget-conscious upfits on lighter chassis — 12V cranes are simpler and less expensive to install
Both crane types can be built into a new STI
mechanics or service body, and our team can help match crane capacity to chassis rating and daily lift
requirements. Browse our
Tiger Cranes lineup or our full service
body inventory to compare options.
Get the Right Crane on Your Next Truck
Star Truck Equipment builds and outfits crane-equipped service trucks for fleets and owner-operators across
Texas and Louisiana from our shop in Wharton, TX. Call us at (979) 532-1486 or browse our
STI service bodies and
Tiger
Cranes to get started.
