A thorough inspection protects your investment and prevents expensive surprises on day one. Use this checklist whether you're inspecting in person or reviewing a dealer-provided video walkthrough.
1 — Frame & Chassis Critical
Structural issues here are expensive or impossible to safely repair. These are absolute deal-breakers.
- Frame rails — no cracks or fracturesInspect both rails full length. Pay close attention near sub-frame mounts and rear suspension brackets.
- No unauthorized welds or repairsWeld repairs to main frame rails are a serious red flag and may violate manufacturer safety standards.
- Sub-frame integrityThe drum mounting sub-frame must be straight, solid, and free of cracks or corrosion damage.
- No structural rust beyond surface oxidationSurface rust is normal. Scaling, pitting, or holes in frame rails or cross members is not acceptable.
- All cross members present and undamagedMissing or bent cross members indicate impact damage or neglect.
2 — Engine Critical
The most expensive component to replace. A cold-start inspection reveals problems a warm engine hides.
- Cold-start — no excessive smokeA small puff at cold start is normal. Persistent blue smoke means oil burning; white smoke may indicate coolant intrusion.
- Blow-by test at exhaust stackHold a cloth near exhaust at idle. Minimal carbon, no oily residue = good. Excessive blow-by suggests worn rings or a failing engine.
- No oil leaks at engine, turbo, or gasketsInspect the underside while running. Seeping gaskets are manageable; heavy active leaks are a concern.
- Engine oil — correct color & no contaminationDark but clean oil is fine. Milky or frothy oil signals coolant contamination — a serious problem.
- Coolant — clean and at proper levelBrown or rusty coolant points to neglected maintenance or possible head gasket issues.
- Engine runs smooth at idle and under throttleListen for knocking or ticking. Should respond crisply to throttle with no hesitation or smoke.
- Maintenance records or rebuild documentationTrucks with documented engine replacements offer far greater confidence. A fresh long block is a significant value-add.
A truck with a newer engine installed in an older chassis can be an excellent value — the engine is the most expensive component, and a fresh long block adds years of service life.
3 — Drum & Mixing System Critical
The drum is the core of a mixer truck. Repairs or replacement are costly and time-consuming.
- Drum exterior — no cracks or major damageSmall operational dents are normal; cracks or deep structural gouges are serious concerns.
- Internal fins (flights) — above 50% heightShine a light inside and inspect the spiral fins. Fins worn below 50% of original height reduce mixing efficiency significantly.
- Drum spins smoothly in both directionsRun in both charge and discharge directions — smooth, quiet, and consistent at varying RPMs.
- Drum rollers and track — no wear or misalignmentMisaligned or worn rollers cause early drum failure and are expensive to address.
- Discharge chute — complete and functionalAll sections present, intact, and able to fold and lock correctly.
- Water system — pump, tank, and meter all workTest fill, metering, and discharge. A non-functional water system can cause immediate operational issues.
4 — Hydraulic System Important
Hydraulics drive the drum and chute. Leaks and worn components indicate deferred maintenance and lead to downtime.
- No leaks at pump, motor, or fittingsInspect all hydraulic lines, fittings, pump body, and drum motor for seepage or active leaks.
- Hydraulic fluid — clean and at proper levelDirty, dark, or foamy fluid suggests neglected service intervals or contamination.
- Hoses — no cracking, abrasion, or improper routingDry-rot and abrasion points are common failure sources. Hose failures are sudden and cause immediate downtime.
- Drum speed consistent under loadWith water or concrete in the drum, speed should stay consistent — no sluggishness or surging.
5 — Transmission & Drivetrain Important
- Smooth shifting through all gearsAllison automatics should shift without jerking, slipping, or hesitation. Rough shifts can indicate hydraulic or clutch pack wear.
- No leaks at transmission or differentialCheck for gear oil seepage from transmission output, rear axle differentials, and any transfer case.
- Driveshaft u-joints — no rotational playWorn u-joints create vibration and can fail catastrophically under load.
- No unusual drivetrain noise when movingClunks on acceleration/deceleration, vibration at speed, or grinding are all warning signs.
6 — Brakes & Air System Critical
Safety-critical. Air brake issues can result in DOT out-of-service violations on day one.
- Air system builds to full pressure quicklyShould reach 120–130 psi within a few minutes of startup. Slow build indicates compressor or governor issues.
- No audible air leaks with engine offShut engine off at full pressure and listen. Any hissing must be traced and repaired before use.
- Brake chambers and slack adjusters intactNo damage or oil contamination. Confirm auto slack adjusters are functional.
- Brake test — even, straight, responsiveTest at low speed on a safe surface. Should stop straight and evenly, no pulling, grabbing, or spongy feel.
Do not drive on public roads if the truck pulls under braking, has weak brakes, or fails to hold air pressure. The brake system must be inspected and repaired by a certified technician first.
7 — Cab & Controls Standard
- All gauges functional and reading correctlyOil pressure, temp, air pressure, fuel, and voltage gauges should all operate.
- All exterior lights operationalNon-functional lights are a DOT violation and must be fixed before operating on public roads.
- HVAC — heat and A/C both functionalDriver comfort directly affects safety. Both should be confirmed operational.
- Windshield — no cracks in driver's sight lineCracks in the primary sight line are a DOT violation in most jurisdictions.
- Wipers, horn, seatbelt all functionalAll required for DOT compliance on public roads.
8 — Tires & Wheels Important
- Tread depth — min 4/32" on steer axleDOT requires 4/32" on steer axle tires, 2/32" on drives. Factor replacement cost into your total acquisition budget.
- Sidewalls — no bulges, cuts, or exposed cordsSidewall damage is a DOT out-of-service violation and a safety hazard.
- Wheel ends — no leaking hub sealsOil on the inside of the wheel/tire indicates a leaking hub seal — a safety issue and sign of neglect.
- All lug nuts present and tightMissing or loose lug nuts are a serious and immediate safety concern.
How to Read Your Results
Minor items noted and priced in — proceed.
Use repair estimates to adjust the offer.
Frame, engine, or brake failures — not worth the risk.
How Cement Trucks Inc. Handles Inspections for You
Can't travel to inspect in person? Cement Trucks Inc. provides detailed video walkthroughs of every truck — cold-start recordings, blow-by checks, clear stack tests, drum rotation, and full frame walkarounds. You get the inspection data you need before you ever arrange transport.
Every truck is sourced from fleets with documented maintenance programs — not random auction pickups. That provenance matters, and it's reflected in every truck sold.
See Our Trucks Before You Commit
Every listing includes video documentation — inspect from anywhere in the country before you buy.
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