SANY SY210C-9 Maintenance Checklist
Daily pre-start checks · Service schedule by hours · Warning alert actions — for the Cummins BT5.9-140C powered SY210C-9
Daily Pre-Start Checklist
Complete all checks before every shift. Do not start the engine until every item is verified — catching a fault in the yard is far cheaper than a breakdown on site.
Engine — Oil, Coolant & Belts
Pull dipstick — wipe, reinsert, remove. Oil must read between MIN and MAX (top up with Cummins-approved SAE 15W-40 API CI-4/CJ-4; capacity 14 L). Check coolant between LOW and FULL (24 L). Inspect drive and alternator belts for fraying/slipping and check for oil leaks.
Act if: oil below MIN, coolant low, any leak or unusual noise — do not start.
Engine Coolant
Inspect overflow reservoir — level between LOW and FULL. Add distilled water + coolant mix (30–50% ethylene glycol) only (24 L system). Check for leaks at hoses and clamps.
Do NOT open the radiator cap when hot.
Hydraulic Oil Level
With boom/arm retracted and bucket flat on the ground, check the sight glass — level must be in the green zone. Use SANY/Cummins-approved hydraulic oil (239 L tank / 180 L refill). Inspect hoses and cylinders for leaks.
Act if: below green zone or milky/contaminated oil — do not operate.
Fuel Level
Check the fuel gauge on the DOMCS display. Drain water from the fuel pre-filter sediment bowl daily — open the drain valve until clean fuel flows. Fuel tank capacity: 350 L.
Fill before the start of shift to prevent air entering the fuel system.
Air Filter Indicator
Check the restriction indicator on the filter housing — RED zone means clean or replace the primary element immediately. Tap the pre-cleaner to remove dust. The Cummins BT5.9 is sensitive to dust ingestion.
Do NOT operate with a clogged filter.
Battery & Electrical
Inspect both battery terminals (2 × 12V) for corrosion — clean with a dry cloth if needed. Check all cables are tight and undamaged. Verify the master switch. Confirm the DOMCS display powers on with no stored fault codes.
Act if: heavy corrosion, loose terminals or stored fault codes — resolve before starting.
Tracks & Undercarriage
Walk around both tracks — check sag (allowable 10–30 mm at mid-span). Remove mud, stone packing and debris from the frame, roller guards and between track shoes. Check for cracked or broken track shoes (45 per side).
Act if: sag out of range, stone packing or cracked shoes — clear/adjust before operating.
Attachment Controls
Test boom, arm and bucket controls in an open area — all must respond smoothly, without hesitation or spongy feel. Check bucket teeth for excessive wear or missing tips. Inspect the cutting edge and side plates.
Act if: spongy/hesitant response or worn teeth — repair before use.
Greasing
Apply EP-2 lithium grease to all boom foot, boom cylinder, arm cylinder, bucket and linkage pins. Check pin locking plates are secure. Inspect the swing bearing grease point.
In dusty or wet conditions, grease every 4–8 hours.
Machine Alerts (DOMCS)
Check the DOMCS intelligent controller display for active fault codes, warning indicators or alert messages. Verify all gauge readings are within normal range before starting the engine.
Note any codes — do not clear without diagnosing.
Cab & Safety Equipment
Check the lockout (safety lever). Fasten the seatbelt and confirm it is secure. Inspect mirrors and ROPS/FOPS cab guard condition. Test the horn and backup alarm. Check the fire extinguisher charge. Windscreen clean and undamaged.
Act if: any safety device fails — do not operate until repaired.
Service Schedule by Hourmeter
Select a service interval to see what is due for the Cummins BT5.9-140C. CHANGE = fluid/filter change CHECK = inspect or verify.
Engine oil & oil filter
Break-in change mandatory at 50h — SAE 15W-40 (14 L)
Air filter — primary element
Inspect element; check intake hose clamps for dust entry
Drive & alternator belt
Inspect for cracking, fraying and tension
Engine mounts & exhaust
Check mount bolts; inspect manifold and turbo for leaks
Hydraulic return filter
Check condition; replace only if required per SANY instruction
Hoses, cylinders & fittings
Inspect for swelling, chafing and weeping rod seals
Pump & control valve
Listen for abnormal noise; check for seepage
Fuel pre-filter / water separator
Drain water from sediment bowl daily before starting
Primary fuel filter
Inspect; replace only if required by commissioning checklist
Fuel tank & lines
Inspect exterior, lines and breather for chafing/seepage
Radiator fins & core
Clean fins with compressed air (blow from engine side outward)
Track tension
Sag 10–30 mm mid-span; adjust via grease tensioner
Rollers, idlers & sprockets
Inspect for seepage, cracking and uneven wear
Track shoe bolts & links
Check bolt torque (45 shoes/side); inspect link pins
Greasing — all attachment pins
EP-2 lithium grease on all boom/arm/bucket/linkage pins
Structural inspection
Boom, arm, bucket, frame and welds for cracks
Critical fasteners
Torque-check boom/arm/bucket pins and mounting bolts
Battery, DOMCS & lights
Check terminals/charging, DOMCS display, lights, horn and alarm
Engine oil & oil filter
Change every 250h — SAE 15W-40 (14 L)
Air filter — primary element
Clean with dry compressed air (max 30 psi); inspect clamps
Drive & alternator belt
Inspect tension and condition
Fuel pre-filter / water separator
Drain water from sediment bowl daily
Primary fuel filter
Inspect element and water separator
Hoses, cylinders & fittings
Inspect for swelling, chafing and weeping seals
Coolant level & quality
Level LOW–FULL; test concentration; check hoses/clamps
Radiator fins & core
Clean with compressed air
Swing gearbox oil
Check level; top up SAE 90 GL-4 if low (4 L)
Travel gearbox oil — both sides
Check level; top up SAE 90 GL-4 if low (5.5 L each)
Track tension
Sag 10–30 mm mid-span
Rollers, idlers & sprockets
Inspect condition
Greasing — all attachment pins
EP-2 lithium grease on all pins
Battery & lights
Check terminals/charging, lights, horn and alarm
Engine oil & oil filter
Change — SAE 15W-40 (14 L)
Air filter — primary element
Clean or replace depending on condition
Drive & alternator belt
Inspect tension and condition
Engine mounts & exhaust
Check mounts; inspect manifold and turbo
Hydraulic oil
Inspect colour/smell; take a sample if working in dust
Hydraulic return filter
Replace element; inspect magnetic drain plug
Hoses, cylinders & fittings
Inspect; tighten loose fittings
Pump & control valve
Inspect for noise and seepage
Fuel pre-filter / water separator
Drain water daily
Primary fuel filter
Replace; bleed/prime after — do not run dry
Fuel tank & lines
Inspect tank, lines and breather
Coolant level & quality
Level and concentration check
Radiator fins & core
Clean with compressed air
Swing gearbox oil
Check level (4 L SAE 90 GL-4)
Travel gearbox oil — both sides
Check level (5.5 L each)
Swing bearing ring gear
Grease full 360° with NLGI-2; check backlash and bolts
Track tension
Sag 10–30 mm mid-span
Rollers, idlers & sprockets
Inspect condition and alignment
Track shoe bolts & links
Check torque; inspect link pins
Greasing — all attachment pins
EP-2 lithium grease on all pins
Structural inspection
Boom, arm, frame and welds for cracks
Critical fasteners
Torque-check pins and mounting bolts
Battery, DOMCS & lights
Check terminals/charging, DOMCS, lights, horn and alarm
Engine oil & oil filter
Change — SAE 15W-40 (14 L)
Air filter — primary element
Replace regardless of condition
Air filter — safety element
Replace only — never clean
Drive & alternator belt
Replace if worn, glazed or cracked
Engine mounts & exhaust
Check mounts; inspect manifold and turbo
Hydraulic oil
Inspect condition; sample if contaminated
Hydraulic return filter
Replace element; check magnetic drain plug
Hydraulic pilot filter
Replace; inspect pilot pump inlet strainer
Hoses, cylinders & fittings
Full inspection of hoses, cylinders and fittings
Pump & control valve
Inspect for noise and seepage
Fuel pre-filter / water separator
Drain water daily
Primary fuel filter
Replace; bleed/prime after
Fuel tank & lines
Inspect tank, lines and breather
Coolant level & quality
Level and concentration check
Radiator fins & core
Clean with compressed air
Swing gearbox oil
Check level (4 L)
Travel gearbox oil — both sides
Check level (5.5 L each)
Swing bearing ring gear
Grease full circumference with NLGI-2
Track tension
Sag 10–30 mm mid-span
Rollers, idlers & sprockets
Measure wear; check idler alignment and sprocket teeth
Track shoe bolts & links
Check torque; inspect link pins for elongation
Greasing — all attachment pins
EP-2 lithium grease on all pins
Structural inspection
Full inspection of boom, arm, frame and welds
Critical fasteners
Torque-check pins and mounting bolts
Battery & charging
Check terminals, alternator voltage and starter cables
DOMCS diagnostics
Download fault history; review machine alerts log
Lights, horn & alarms
Check work lights, horn, backup alarm and wiring
Engine oil & oil filter
Change — SAE 15W-40 (14 L)
Air filter — primary & safety
Replace both elements regardless of condition
Drive & alternator belt
Replace
Engine mounts & exhaust
Full check of mounts, manifold and turbo
Hydraulic oil — full change
Drain fully, flush and refill — 180 L SANY-approved fluid
Hydraulic return filter
Replace element
Hydraulic pilot filter
Replace; inspect pilot pump strainer
Hoses, cylinders & fittings
Full inspection
Pump & control valve
Full inspection of pumps and valve block
Fuel pre-filter / water separator
Drain water daily
Primary fuel filter + injectors
Replace filter; inspect injectors and fuel lines
Fuel tank & lines
Full inspection
Radiator fins & core
Clean with compressed air
Coolant — full change
Flush system; refill 24 L ELC mix 30–50%; pressure-test cap/hoses
Swing gearbox oil
Drain, flush, refill — 4 L SAE 90 GL-4
Travel gearbox oil — both sides
Full change — 2 × 5.5 L SAE 90 GL-4
Swing bearing ring gear
Grease and inspect ring gear backlash and bolts
Track tension
Sag 10–30 mm mid-span
Rollers, idlers & sprockets
Full wear measurement
Track shoe bolts & links
Check torque and measure link pin elongation
Greasing — all attachment pins
EP-2 lithium grease on all pins
Structural inspection
Full inspection incl. counterweight mounting bolts
Critical fasteners
Torque-check all critical bolts
Battery & charging
Full check of battery, alternator and starter circuit
DOMCS diagnostics
Full controller diagnostic and fault-log review
Lights, horn & alarms
Check all lights, horn, backup alarm and harness
Warning Alerts & Immediate Actions
Indicators appear on the SANY DOMCS intelligent controller display. Every operator must know the correct response.
Engine Oil Pressure Low
Oil pressure has dropped below the minimum threshold and the DOMCS alarm sounds — can indicate oil pump failure, low oil level or a blocked oil passage.
Immediate action: STOP the engine immediately. Do not restart. Check oil level and add if below MIN (14 L). If the level is OK, do not start — call SANY / Cummins service.
Risk if ignored: running with low oil pressure destroys the engine bearings.
Engine Coolant Temperature High
Coolant temperature exceeds 105°C (Cummins BT5.9 limit) — can indicate a blocked radiator, coolant loss, failed thermostat or a broken water-pump belt.
Immediate action: STOP work. Idle at low speed 3–5 minutes to cool the turbocharger, then shut off. Do not open the radiator cap when hot. Check coolant (24 L) and clean the radiator fins.
Risk if ignored: warped cylinder head, blown head gasket, seized engine.
Engine Coolant Level Low
Coolant in the overflow reservoir has dropped below the LOW mark — indicates a slow leak or consumption (24 L system).
Immediate action: STOP at a safe position and let the engine cool completely. Check hoses, clamps and radiator for leaks. Top up with the correct 30–50% ethylene glycol mix.
Do NOT add plain water alone — it damages Cummins BT5.9 liner seals.
Hydraulic Oil Temperature High
Hydraulic oil temperature exceeds the safe limit (typically > 90°C), causing accelerated seal wear and oil degradation.
Immediate action: reduce cycle intensity — hold the boom raised and idle 5–10 minutes to let the oil cool. Check the oil cooler fins for blockage and check the oil level. If it persists, stop work and call service.
Risk if ignored: pump seal failure, cylinder seal damage, control-valve damage.
Fuel Level Low
Fuel is below the safe reserve in the 350 L tank. The Cummins BT5.9 common-rail system is sensitive — running dry causes an air lock and requires re-priming.
Immediate action: complete the current cycle and move to a safe refuelling location. Refuel from a clean, filtered source and drain the water separator afterwards.
Do NOT run dry — re-priming requires bleeding the fuel system.
Air Filter Restriction
The air-intake restriction indicator is in the RED zone. A clogged filter reduces Cummins BT5.9 power, increases fuel consumption and accelerates wear.
Immediate action: stop at a safe position. Remove the primary element — tap gently or clean with dry compressed air (max 30 psi, from inside out). Never wash with water. Replace if damaged or cleaned more than 3 times.
Risk if ignored: power loss, black smoke, overheating, injector damage.
Battery / Charging Fault
Charging-system fault or low battery voltage (2 × 12V system) — can indicate alternator failure, a loose belt or corroded terminals.
Immediate action: check and tighten battery terminal connections. Inspect the alternator drive belt tension and condition. If the fault persists, stop work — do not allow the batteries to fully discharge in the field. Contact a SANY electrician.
Risk if ignored: machine will not restart once batteries are flat.
Cummins Engine Fault Code
The Cummins BT5.9 ECM has logged a fault code on the DOMCS display. RED = active fault that may derate power; AMBER = logged but not currently critical.
Immediate action: note the fault code number exactly. Do not clear the code before diagnosis. RED codes: stop work immediately and contact Cummins / SANY service. AMBER codes: continue with caution and schedule service.
Risk if ignored: undiagnosed faults can escalate to component failure.
DOMCS Machine Alert
The SANY DOMCS intelligent controller has detected a system anomaly — may relate to pump pressure, a sensor reading or control-valve feedback.
Immediate action: note the alert description on the display. Check the corresponding system (hydraulic pressure, engine, electrical) per the DOMCS operator manual. Log the alert with the machine-hour reading and report to your SANY dealer at the next service.
Risk if ignored: a developing fault left unattended until it becomes a breakdown.
Dig. Depth
Dump Height