OTIS 508-XO Step chain complete for 12 steps(36 links left+36 links right,pins d=12,7mm)roller 76x22mm WITH 2 BUSHING and 1 bearing 6203,outer plates 4x26mm/inner plates 3x35mm 70KN
OTIS 508-XO Step chain 70KN
Installation
Escalator Step Chain Installation Instructions
- Core Safety Precaution
- Lock and tag out the escalator power supply before all operations, ensure the equipment remains stationary and powered off throughout the entire installation process.
- Wear certified personal protective equipment (PPE) including safety gloves, goggles, and anti-slip safety shoes.
- Set up safety barriers around the work area to block unauthorized access.
- Tools & Materials Preparation
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- Required tools: Wrenches, socket sets, chain cutters, lifting equipment, tension gauges, lubrication tools, and precision measuring tools.
- Required materials: New escalator step chain (matching the manufacturer’s model specifications), manufacturer-approved chain lubricant, and replacement fasteners (if needed).
- Step-by-Step Installation
- Step 1: Pre-Installation Inspection
- Inspect the new step chain for manufacturing defects, deformation, or damage; confirm the chain specifications fully match the escalator model.
- Inspect drive sprockets, tensioners, and guide rails for wear, damage, or misalignment; replace severely worn components before installation.
- Step 2: Dismantle Obstacles
- Remove escalator steps, inner/outer cover plates, and apron boards at the working section to fully access the chain assembly.
- Secure the unused chain section with professional fixtures or steel wires to avoid accidental displacement.
- Step 3: Remove Old Chain (for replacement scenarios)
- Loosen the chain tensioner to release all tension from the old step chain.
- Disconnect the old chain from drive sprockets and tension wheels, then lift it out from the escalator truss.
- Clean the drive system, sprocket teeth, and guide rails thoroughly to remove dust, debris, and residual old lubricant.
- Step 4: Install the New Step Chain
- Lay the new chain along the guide rails, ensure precise engagement with drive sprockets and tension wheels on both sides of the escalator.
- Align chain links with sprocket teeth accurately, avoid misalignment or tooth skipping.
- Connect the chain two ends with the manufacturer-specified connecting links, and secure with snap rings or locking fasteners.
- Step 5: Tension & Alignment Adjustment
- Adjust the chain tensioner to reach the manufacturer-recommended tension value, and verify with a tension gauge.
- Check the chain operation on both sides, ensure smooth running on sprockets and guide rails without lateral deviation.
- Confirm the chain transitions properly at the upper and lower reversing sections.
- Step 6: Lubrication
- Apply manufacturer-approved chain lubricant evenly to all chain links, rollers, and pins.
- Wipe off excess lubricant to prevent dust and debris accumulation.
- Step 7: Reassemble Dismantled Components
- Reinstall escalator steps, cover plates, apron boards, and other removed parts in reverse dismantling order.
- Adjust step positions to ensure smooth movement and consistent gaps between adjacent steps.
- Post-Installation Testing
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- First perform a no-load test run, check for abnormal noise, vibration, or chain skipping issues.
- Conduct a full-load test run per the escalator’s rated load, verify the chain runs smoothly and steps operate synchronously.
- Recheck chain tension and alignment after test runs, make minor adjustments if necessary.
- Confirm all safety protection functions work normally before putting the escalator back into formal service.
Common question
| Delivery time | About 7-14 days in peak season. |
| Warranty period | 12 months. |
| Product packaging | Carton or wooden box/pallet, depending on the different situations. |
