1. Scope and purpose
This technical manual is dedicated to the inspection and restoration of the electric chair. This approach is performed regularly to ensure safety, stable performance, and longevity. This includes diagnosing the drive box, measuring the brake disc and checking the link tension. Regular maintenance is critical to avoid outages and outages.
2. Preventive measures
Important: Block and mark energy sources before work. Use special equipment for working with high voltage. Use personal protective equipment, including work gloves, eye protection, and a mask.
3. Necessary tools and materials
| Tool/material | Specification | Quantity |
|---|---|---|
| Torque screwdriver | The minimum rotation is 10-150 Nm | 1 |
| Micrometer | 0-25 mm | 1 |
| Ruler | 0-300 mm | 1 |
| Torque screwdriver | The range is 10-150 Nm | 1 |
| Manometer | 0-100 bar | 1 |
| Tester | 0-1000 V | 1 |
4. Inspection before service
| Point | Verification | Acceptance/rejection criteria | Notes |
|---|---|---|---|
| 1 | Power supply connection | Power is off | Use blocking and tagging |
| 2 | Condition of the chair surface | No peeling | Remove old peelings |
| 3 | Brake disc condition | No cracks | Measure the thickness |
| 4 | Link status | No stretching | Measure the length |
| 5 | The condition of the drive box | No leaks | Measure the pressure |
5. Step by step procedure
- Disconnecting the power supply
Disconnect the power supply to the chair. Perform blocking and tagging of all energy sources. Check the absence of voltage at the terminals.
Value: The voltage should not be more than 24 V.
Visual indicator: No glow on the display.
Error: Improper disconnection can cause injury.
- Opening the drive box
Open the box using the appropriate tools. Check the condition of the gears, bushings and suspension.
Value: The pressure in the drive box must not exceed 50 bar.
Visual indicator: No leaks, no thick setting layer.
Bug: Improper opening can lead to a leak.
- Measuring the brake disc
Measure the thickness of the brake disc from the edge to the center. Use a micrometer.
Value: Thickness from 8 mm to 12 mm.
Visual indicator: The thickness is appropriate.
Error: Incorrect measurements can cause a crash.
- Checking chain tension
Measure the length of the chain. Use a ruler.
Value: The length should not exceed 10 mm.
Visual indicator: The length is appropriate.
Error: Incorrect measurements can cause a crash.
- Installing the drive box
Install the drive box in the appropriate position. Tighten the nuts to the appropriate torque.
Value: Torque wrench 10-150 Nm.
Visual indicator: Nuts are tightened.
Bug: Insufficient clamping torque can cause failure.
6. After service check
| Test | Expected result | Actual result | Pass/Fail | |
|---|---|---|---|---|
| 1 | Electricity supply | Lack of tension | ||
| 2 | Pressure in the drive box | 50 bar | ||
| 3 | Brake disc thickness | 8-12 mm | ||
| 4 | The length of the chain | 10 mm |
7. Diagnosis of problems
| Symptom | Reasons | Corrective actions |
|---|---|---|
| The chair does not move | Lack of tension | Check the power supply |
| Increased noise | Leaks in the drive box | Check the pressure |
| Unstable movement | Chain tension | Measure the length |
| The brakes don't work | Disc thickness is insufficient | Measure the thickness |
8. Recommended maintenance schedule
| The task | Frequency | Estimated duration | Skill level |
|---|---|---|---|
| Overview of the drive box | monthly | 30 min | Average |
| Measuring the brake disc | Quarterly | 20 min | Average |
| Checking the tension of the chain | monthly | 15 min | Average |
9. Sectional parts
| Description of the part | Typical specification | UNITEC-D category |
|---|---|---|
| Brake disc | 8-12 mm | UNITEC-D 2015 |
| Chain | 10 mm | UNITEC-D 2016 |
| Nut | 10-150 Nm | UNITEC-D 2017 |
Visit our catalog for details: https://www.unitecd.com/e-catalog/
10. Links
OKP 18101-2010, EN 13411-2, ISO 12100, DSTU 2968-2006, manufacturer's documentation.
