The SANY STC800 is an 80 t truck crane built for heavy lifting, long-reach boom work and highway mobility. It uses a five-section U-type 12.96-50 m boom, 10.2 m / 17.5 m jib options, 15.65 t counterweight, H-type fully hydraulic outriggers, load-sensing hydraulics and SANY safety systems.
80 t
3,293 kN.m
12.96-50 m
67.5 m
276 kW @ 1900 rpm
1800 N.m @ 1000-1400 rpm
80 km/h
44%
8 x 6.43 m
15.65 t
8 x 4 x 4
130 m/min
50,000 kg
15.29 x 2.8 x 3.88 m
80 t / 30 t / 7.5 t
Detailed technical specifications for SANY STC800 80T Truck Crane
Daily pre-start checks · Service schedule by operating hours · Warning alert actions — SANY STC800 80-ton truck crane.
Complete all checks before every shift. Estimated time: 10–15 minutes.
With the boom fully stowed on level ground, check the hydraulic oil tank sight gauge.
Act if: below MIN or oil appears milky/foamy.
Check the cold, stopped engine dipstick.
Act if: below MIN, black/gritty, or smells of fuel.
Check the transmission level plug/dipstick; check the oil condition and level.
Act if: below minimum, discoloured, or burnt-smelling.
Check front and rear axle differential level plugs; check the oil condition and level.
Act if: below minimum or an axle housing leak is visible.
Check the reservoir with the engine cold; inspect the cooling system for leakage.
Act if: below MIN, discoloured, or leaking.
Check the fuel gauge and drain the fuel/water separator.
Act if: water/sediment is present or any fuel leak is found.
Check the Stage IV/V SCR-system tank gauge.
Act if: empty or contaminated.
Check the reservoir sight glass.
Act if: below the minimum mark.
Open each air-tank drain valve and release condensation.
Act if: excessive water/oil drains or air builds slowly.
Start the engine and confirm normal working pressure before moving.
Act if: pressure remains low or the warning stays on.
Test headlights, indicators, hazards and beacon; verify them during a walk-around.
Act if: any required lamp is inoperative.
Check steering-wheel free play and power-steering fluid level.
Act if: free play is excessive or steering feels heavy/notchy.
Test brake-pedal feel/travel and exhaust-brake operation.
Act if: pedal is soft/sinking or the vehicle pulls aside.
Check pedal free play and engagement.
Act if: slipping, chattering, or noisy.
Check both 12 V maintenance-free batteries, terminals, charge indicator and disconnect switch.
Act if: corroded/loose or charge warning remains on.
Inspect all tyres cold and check pressure with a gauge.
Act if: pressure is outside range, cut, cord-exposed, or unevenly worn.
Inspect full lengths for broken wires, kinks, corrosion and diameter loss. Main: 20 mm × 250 m; auxiliary: 20 mm × 145 m.
Act if: discard criteria are met or kinking/bird-caging appears.
Inspect for cracks/deformation and verify the latch closes and locks freely.
Act if: cracked, throat opening enlarged, or latch fails.
Inspect beams, jacks, pads and locking pins. Full span: 8 m transverse × 6.43 m longitudinal.
Act if: beams are bent, jacks leak, or pins will not seat.
Run the self-test for LMI, anti-two-block, third-wrap protection and boom-height limiter.
Act if: self-test fails, lamp/buzzer is inactive, or a fault code appears.
Use the hourmeter for scheduled service. Gearbox and axle oil changes are kilometre-based.
Oil pressure and coolant
Check oil pressure; inspect coolant level and condition
Fuel separator and DEF
Drain water separator; inspect DEF/SCR level
Hydraulic oil, hoses and fittings
Inspect level, oil condition and the complete system for leaks
Wire ropes
Visual inspection of main, auxiliary and visible telescoping ropes
Third-wrap and anti-two-block
Function-test both protection devices and the LMI
Batteries and terminals
Inspect both 12 V batteries and disconnect switch
CAN-bus instrument self-check
Confirm the cluster completes without faults
Air-filter element
Inspect for restriction, damage and contamination
Suspension and wheel nuts
Inspect steel plate springs; check/re-torque wheel nuts to approximately 575 ± 25 N·m
Air dryer
Inspect dryer and desiccant condition
Chassis grease points
Use No. 2 lithium-base grease; No. 3 for hot climates
Superstructure points
Grease boom pivots, telescoping sections and sheaves
Mounting and pins
Inspect the fixed/removable counterweight mountings and locking pins
Engine oil and filter
Change 23 L oil charge and filter; first fill is 25 L
Fuel and air filters
Replace fuel/water-separator and air-filter elements
Hydraulic return filter
Replace the return-line element
Front-axle toe-in
Inspect and adjust if required
Brake linings / pads
Inspect wear and investigate increased pedal travel
Swing bearing
Grease at 500 h or every six months, whichever occurs first
Wire ropes and telescoping ropes
Full discard-criteria inspection; adjust telescoping-rope tension
Winch/swing reducer and limit devices
Inspect reducer oil; adjust/calibrate third-wrap and anti-two-block protection
Common-rail injectors
Inspect the 160 MPa common-rail system and injector operation
Engine oil pressure
Verify 350–550 kPa normal pressure and at least 100 kPa at idle
Safety-device calibration
Confirm LMI, anti-two-block, third-wrap and boom-limit functions
Hydraulic oil
Change the complete hydraulic oil charge
Hoses, fittings and filter
Detailed inspection; replace damaged hoses and service filtration
Reducer oil
Change winch and swing reducer oil
Boom, hoist and swing structure
Detailed inspection and complete lubrication
Coolant
Change at 4,000 h or every 12 months, whichever occurs first
DEF / SCR system
Complete annual system service
Air-dryer desiccant
Replace annually
Gearbox and differential oils
Change after the initial 1,000 km, then every 20,000 km; do not use the hourmeter for these items
RED = stop the engine or crane motion immediately. AMBER = act before continuing.
Actual load/radius exceeds rated capacity.
Immediate action: stop hoisting, luffing or telescoping; lower the load or reduce radius until the LMI confirms a safe range.
Risk if ignored: boom failure, tip-over or structural overload.
The hook block is contacting or approaching the boom-nose sheave.
Immediate action: stop hoist/luffing motion; lower the hook or extend the boom to clear it.
Risk if ignored: snapped rope, dropped load or boom-nose damage.
Too few wire-rope wraps remain on the drum.
Immediate action: stop lowering and raise the hook back onto the drum.
Risk if ignored: rope pull-out and dropped load.
Coolant temperature is above the normal range.
Immediate action: stop the engine when safe; never remove the radiator cap while hot.
Risk if ignored: overheating, warped head/block and engine failure.
Pressure has dropped below the safe minimum.
Immediate action: stop the engine immediately and check the oil level before restarting.
Risk if ignored: bearing seizure or complete engine failure.
Reservoir level is low or oil temperature is excessive.
Immediate action: reduce load, stop non-essential hydraulic functions and check oil level/cooling.
Risk if ignored: pump cavitation and hydraulic damage.
The boom is near its preset height or angle limit.
Immediate action: ease off the triggering function and confirm overhead clearance; do not override.
Risk if ignored: obstruction strike or over-angle damage.
Brake-system pressure is below its normal working range.
Immediate action: stop safely and do not travel until pressure is restored.
Risk if ignored: loss of braking ability.
SCR-system fluid level is low.
Immediate action: refill DEF as soon as possible.
Risk if ignored: reduced-power derate mode.
Broken wires, diameter reduction, corrosion, kinking or bird-caging is present.
Immediate action: remove the rope from service and replace it before further hoisting.
Risk if ignored: sudden rope failure and dropped load.
Everything you need to know about the SANY STC800 Truck Crane