Here are many of the key things that industry experts recommend you check before purchasing a pre-owned / second-hand Toyo TM-245H2 injection molding machine. Some are general used-machinery inspections; others are more specific to this model and its class.

---

What is the Toyo TM-245H2 — key basics

To put the checks in context, here are some spec “anchors” (what you typically expect):

• 245 ton clamp force.
• Shot size ~20.8 oz.
• Tie bar spacing ~24.02″ × 24.02″; platen size ~32.28″ × 32.28″; clamp stroke ~20.47″.
• Control system: Toyo’s PLCS-11.

Knowing these helps to assess wear vs expected use, and makes verifying seller claims easier.

---

What to check / inspect closely

Here are expert-recommended aspects to verify, grouped by categories:

Category	What to check & why
General condition and history	• Age & usage hours: How many hours has the machine run? What was the duty cycle (light, heavy)? High hours under heavy use increase chances of component wear. • Usage / application history: What kind of materials, molds, cycles was it doing? (High temperature resins, corrosive materials, fast cycling etc.) • Service / maintenance history: Are there records? Regular maintenance (hydraulic oil, heater bands, cooling, safety, etc) matters. • Environment: Was it used in a clean dry factory or in rough dusty/humid environment? That affects condition.
Mechanical & structural components	• Clamping unit (platen / tie bars / platen alignment): Check for twist, warp, scoring, or damage on platens. Tie bars should be straight, nuts and ends in good shape. • Hydraulic system: Pumps, valves, hoses, seals, cylinders. Look for leaks, seepage, slow response under load, noises, and overheating. Shot unit / Injection unit: Barrel wear (look for pitting, corrosion, excessive wear), screw condition, check for degraded heater bands, thermocouples. • Clamping stroke & safety interlocks: Ensure safety devices work (door lock, safety guards etc); clamp opens/closes fully without problems. • Core pull, knock-out mechanisms, mold mounting: If equipped, check these operate smoothly and without misalignment.
Electrical / Control / Automation / Interface	• Controller (PLCS-11 in many units): Check if it’s functioning well, any error logs, replacement/repair history. • Sensors, limit switches, thermocouples, heat control: Are they accurate? Do they drift or fail? • Servo motors / drives: If the machine has electric components (servo / all-electric versions, or motors for movement), check motor health, cables, connectors. • Robot interface / automation: If included, test communication, wiring, alignment. • Power supply compatibility: Voltage, phases (3-phase), quality, any issues with spikes / stability.
Hydraulic / Cooling / Auxiliary systems	• Hydraulic oil condition: colour, contamination, smell. Look for signs of water ingress or thermal damage. • Coolant / cooling system: Check cooling pumps, heat exchangers, filters. Overheating history is destructive. • Clamps / tie-bar lubrication: These large machines need good lubrication on moving parts. • Temperature control (barrel heaters, platen heaters) – ability to reach required setpoints, stability.
Performance under test / running condition	• Run it under power / test cycle: If possible, do a trial mold / test a run under real load. • Cycle time, consistency, stability: Heat up times, injection consistency, shot size accuracy, repeatability. • Noise, vibration, smoke: Unusual noise or vibrations can indicate wear or misalignment. • Warm-up behaviour: Sometimes faults show up only when machine is hot. • Startup behaviour: How it starts cold; ease of startup; any delays or misfires.
Wear / replacement parts availability & cost	• Screw/barrel replacement: These are wear parts; find out cost and lead time. • Controller / electronics spares: Older models might have obsolete parts. • Hydraulic seal kits, valve spools, heaters, etc: How easy/hard are they to get; cost and shipping. • Mold compatibility: The machine’s platen dimensions, tie-bar spacing etc must match your molds or those you intend to use.
Operational cost & Localization	• Power consumption: Older hydraulic machines tend to be less efficient. Estimate ongoing electricity (or hydraulic oil) usage. • Potential modifications needed: If local voltage, safety standards, environmental regulations differ, what retrofits needed? • Transportation / installation / foundation: This machine is heavy (~23,000 lbs or more), needs proper foundation, power, crane, installation. • Spare parts, service support locally: Are there Toyo / third-party service centres in your area? How fast can spares be delivered?
Documentation & legal / warranties	• Serial #, model #, specification plate: Confirm identity with paperwork to avoid surprises. • User / maintenance manuals: Helpful for future maintenance, troubleshooting. • Warranty or “as is” condition: Most used machines are “as is” — clarify returns or guarantees. • Safety / regulatory compliance: Does machine meet current safety / local regulatory codes? Guards, emergency stops etc.

---

Specific red flags for a Toyo TM-245H2

Here are some issues or warning signs specific to this model, or seen commonly in machines of its size & age:

• Platen warpage during long clamping phases or high clamp force — check platen flatness.
• Tie bar & clamp wear (thermal distortion, scoring) especially in older machines or where molds are large or heavy.
• Worn screw or barrel due to abrasive materials — may need early replacement.
• Heater bands and thermocouple failures — drift over time.
• Hydraulic oil contamination / breakdown; leaking seals in hydraulic cylinders.
• Control unit (PLCS-11) reliability; older firmware or parts may be less supported.
• Issues in mold mounting plate area: damaged bolt holes, misalignment due to crash or improper mold insertion.

---

Checklist you can use on site

Here’s a condensed checklist you can bring with you:

1. Check serial number / dataplate & verify model / year.
2. Ask for and review maintenance / service records.
3. Visually inspect machine (platens, tie bars, guards, frame) for wear, damage, corrosion.
4. Run the machine (cold start). Listen for unusual sounds, check control responses.
5. Heat up & run a test cycle; verify shot size, consistency, temperature stability.
6. Inspect hydraulic system for leaks, hose condition, oil quality.
7. Inspect electrical / sensors / automation interfaces.
8. Verify auxiliary systems (cooling, safety devices, core pull, robot / interface if present).
9. Check parts availability & ask supplier for estimates on key parts (screw, barrel, heaters).
10. Check infrastructure needed locally (power, foundation, lifting, shipping).