Copy - M - Mechanical Inspection - Mech - Riblet EPU
This procedure outlines the monthly inspection tasks for Riblet style ski lifts, ensuring all components are checked and maintained for optimal performance and safety.
Hidden Valley - MO - Lifts
01/16/2026
Copy - M - Mechanical Inspection - Mech - Riblet EPU
This procedure outlines the monthly inspection tasks for Riblet style ski lifts, ensuring all components are checked and maintained for optimal performance and safety.
Drive Sheave Inspection
Primary Gearbox Inspection
EPU Run
Run EPU for 30 minutes coupled to lift per ANSI B77.1-2022 3.3.2.4.3
Enter the start and end time of the EPU run.
Meter Reading at End of Run (rounded UP to nearest whole number)
Meter name
Unit
Carrier Inspection and Maintenance
Tower and Line Inspection
Return Sheave Inspection
Tension Terminal Inspection
Fire Extinguisher Inspection
Fire extinguisher checks
Final Inspection
Notes:
Are both stations free of any employee or guest safety hazards?
Record lift hour meter reading
Meter name
Unit
I acknowledge that all inspections have been completed and meet all applicable standards
Click here to sign
Copy - M - Electrical Inspection - Elec - Riblet
This procedure outlines the steps for conducting a monthly electrical inspection of various components including the motor room, terminals, control cabinets, towers, and associated equipment. It ensures the proper functioning and safety of electrical systems by verifying the operation of lights, heaters, phones, and screens, as well as inspecting wiring and checking voltages.
Lift Safeties
Overspeed Safeties
Test the lift 110% overspeed safety
Rollback Safeties
Test the following: A-B Rollback Reversing Switch
Drive Safeties
Test available electric motor drive safeties. These may include phase loss, armature overcurrent, armature overvoltage, field loss, feedback loss, motor overspeed.
Drive Motor Room Inspection
Check that the terminal lights and heaters are in working condition.
Motor Room Controls
Perform a general inspection of electrical lift components in the motor room and terminal. This may include the following items: If equipped, verify that the HMI screen is operational. Verify that the PLC battery condition light is off. If on, flag and replace battery. Inspect low voltage controls cabinet for loose/broken components, proper operation of fans, cleanliness, presence of drawings, etc. Check control boxes for loose/broken buttons, missing panduit covers, loose/damaged wiring, worn labels and cleanliness. Check safety switches, pushbuttons, etc. for proper functioning, loose wires, worn wires, loose components, wear, and corrosion.
Commline
Inspect commline entrance points to terminal
Braking System
General inspection of brake system electronics. Inspect brake pump motor for excessive oil and dirt buildup, worn brushes. Check for correct operation of pump and motor. Check that wire connections, wires, and switches are securely fastened and in acceptable condition.
Electric Motor Inspection
Inspect the electric motor, while running, for abnormal bearing noise or vibration. If this is a DC motor, look for excessive sparking/arcing on the commutator.
Select Drive Motor Type
if the answer is "oneOf [AC]"
M - AC Motor Inspection - Elec - All
Monthly inspection of AC motor.
Safety
Ensure the following items have been completed before proceeding.
Verify that the appropriate PPE is being used.
Verify that the motor drive has been de-energized and is locked-out. This includes motor heaters if equipped.
Motor Exterior
Check Motor Heater
If applicable, verify that electrical connections are tight and conductors are in acceptable condition.
Check Motor Housing
Verify that the motor housing is free of excessive dirt, dust, and grease deposits.
Motor Greasing
If applicable record the hour meter reading or date on which the motor was greased.
if the answer is "oneOf [Hours]"
Motor Greased at:
Meter name
Unit
if the answer is "oneOf [Date]"
Motor Greased on:
Post Maintenance Check
Tool Check
Verify that all tools are removed from the motor.
Motor Covers
Reinstall all cover panels.
Remove lock-out.
if the answer is "oneOf [DC]"
M - DC Motor Inspection - Elec - All
Monthly inspection of DC motor internal components. Reference material is from Helwig Carbon's Brush Pocket Guide. https://www.helwigcarbon.com/wp-content/uploads/2025/07/2025-Carbon-Brush-Pocket-Guide-single-pages.pdf
Safety
Ensure the following items have been completed before proceeding.
Verify that the appropriate PPE is being used.
Verify that the motor drive has been de-energized and is locked-out. This includes motor heaters if equipped.
Motor Interior
Motor Interior
Inspect the interior of the motor for excessive dust and grease deposits. Use electrical motor cleaner and lint free (t-shirt) rag to clean carbon, dust, and grease deposits. Do not use motor cleaner on the commutator surface. Look for anything unusual. Verify that all fasteners are tight.
Commutator
Check motor commutator bars for uniformity, burning, slag, carbon buildup, etc. If there is a questionable condition, flag and attach a photo. Fail if there is an unacceptable condition and attach a photo. Leave a note on this field describing the condition. Use attached documents for reference.
Brush Bar Ring
Check that brush holders are securely attached to the ring. You should not be able to wiggle the brush holders or bars by hand. Remove excessive carbon buildup with a clean lint-free (t-shirt) rag.
Carbon Brush Inspection
Visually inspect the carbon brushes without removing them from their holders. Check that brush terminals are securely connected and that the shunt wires are not burned or damaged. Brushes in the same row should be of similar length. If any appear excessively uneven or too short, remove and measure them to confirm. For brushes with bevels, measure along the long side. If a brush has a red top, include the pad in the measurement. Refer to the attached documents for guidance. Replace any brushes that are at or below minimum length with suitable spares. Installed brushes must be properly seated on the commutator and match the length of others in the same row.
Motor Exterior
Check Motor Heater
Verify that electrical connections are tight and conductors are in acceptable condition.
Check Motor Fan Filter
Verify that the filter is present and in acceptable condition. Check that all fasteners are secure.
Motor Greasing
If applicable record the date and time on which the motor was greased.
Post Maintenance Check
Brush Springs
Double check that all brush springs are in place and that the brushes are correctly seated.
Tool Check
Verify that all tools (light, ruler, wrenches) are removed from motor.
Motor Covers
Reinstall all cover panels.
Remove lock-out.
Battery Chargers
Verify that all battery chargers are functioning properly. Check that leads are securely fastened to both the batteries and charger.
Drive Station Control Voltage
Measure and record the control voltage in the motor room.
Meter name
Unit
Check APU control voltage.
Make the appropriate selection for this lift's configuration.
if the answer is "oneOf [EPU Only]"
EPU Control Voltage
Record the Evacuation Power Unit battery voltage.
Meter name
Unit
if the answer is "oneOf [APU and EPU]"
APU Control Voltage
Record the Auxiliary Power Unit battery voltage.
Meter name
Unit
EPU Control Voltage
Record the Evacuation Power Unit battery voltage.
Meter name
Unit
Drive Station Lift Shack Inspection
Operator Controls
Perform a general inspection of electrical lift components. This may include the following items: If equipped, verify that the HMI screen is operational. Inspect low voltage controls cabinet for loose/broken components, proper operation of fans, cleanliness, presence of drawings, etc. Check control boxes for loose/broken buttons, missing panduit covers, loose/damaged wiring, worn labels and cleanliness. Check safety switches, pushbuttons, etc. for proper functioning, loose wires, worn wires, loose components, wear, and corrosion.
Check that the lift house lights and heaters are in working condition.
Verify area phones and sound powered phones are working and in good condition.
Return Station and Lift Shack Inspection
Operator Controls
Perform a general inspection of electrical lift components. This may include the following items: If equipped, verify that the HMI screen is operational. Inspect low voltage controls cabinet for loose/broken components, proper operation of fans, cleanliness, presence of drawings, etc. Check control boxes for loose/broken buttons, missing panduit covers, loose/damaged wiring, worn labels and cleanliness. Check safety switches, pushbuttons, etc. for proper functioning, loose wires, worn wires, loose components, wear, and corrosion.
Check that the lift house lights and heaters are in working condition.
Verify area phones and sound powered phones are working and in good condition.
Lift Line
Tower Inspection
Visually inspect all tower wiring while riding the lift both uphill and downhill. Check for the correct position and attachment of all derail detection circuit devices and cable position sensors. Look for and correct any loose wiring that may come in contact with sheaves or carriers. Flag or fail if an unsatisfactory condition exists.
Final Inspection Procedure - All
To be added to the bottom of every global procedure
Notes:
Are all stations free of any employee or guest safety hazards?
Record lift hour meter reading
Meter name
Unit
if the answer is "> 0 "
Hour Meter Reading
Verify that you have selected the correct meter, and that the hour meter reading is the current value.
Copy - M - Brake Torque Test - Mech - Riblet
This procedure outlines the monthly Brake Torque Testing and inspection.
Brakes Inspection
Torque Test all brakes using approved brake testing procedure and testing values
Service Brake
Torque test Service Brake
if the answer is "oneOf [Pass]"
Torque test Value
Meter name
Unit
if the answer is "oneOf [Fail]"
What action was taken
if the answer is "oneOf [Other]"
Torque Test Value after
Meter name
Unit
if the answer is "oneOf [Brake adjusted]"
Torque Test Value after adjustment
Meter name
Unit
Drive Train Backstop Brake
Torque test Drive Train Backstop Brake
if the answer is "oneOf [Fail]"
What Action was taken
if the answer is "oneOf [Pass]"
Torque Test Value
Meter name
Unit
Rollback Device(TRB) Brake
Torque Text Rollback device (TRB) Brake
if the answer is "oneOf [Fail]"
What action was taken
if the answer is "oneOf [Brake Adjusted]"
Torque Test Value after adjustment
Meter name
Unit
if the answer is "oneOf [Other]"
Torque Test Value after
Meter name
Unit
if the answer is "oneOf [Pass]"
Torque Test Value
Meter name
Unit
Measure the Rope travel in inches after pull
Drive Sheave Brake
Torque Test Drive sheave brake
if the answer is "oneOf [Fail]"
What action was taken
if the answer is "oneOf [Other]"
Torque Test Value after
Meter name
Unit
if the answer is "oneOf [Adjusted Brake]"
Torque Test Value after adjustment
Meter name
Unit
if the answer is "oneOf [Pass]"
Torque Test Value
Meter name
Unit
Measure the Rope Travel in inches after pull
Record the set time of brake in seconds
Meter Reading
Record lift hour meter reading
Meter name
Unit
Tech Signature
I acknowledge that all brake settings meet all applicable standards at this time
Click here to sign
Source: Hidden Valley - MO - Lifts (Community Member)