Autoquip PLTC-6050B, PLTC-6050S, PLTC-6050, PLTC-6050K, PLTC-6060A Installation, Operation And Service Manual

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INSTALLATION, OPERATION

AND SERVICE MANUAL

PLTC SCISSORS DOCK LIFT

1058 West Industrial Avenue  Guthrie, OK 73044-1058  888-811-9876

405-282-5200  FAX: 405-282-3302  www.autoquip.com

Item # 830PLT Version 6.0

10/2017

1. Introduction And Warranty ............................................................................................................ 4

1.1 Introduction ................................................................................................................................. 4

1.1.1 Identification .......................................................................................................................... 4

1.1.2 Inspection .............................................................................................................................. 4

1.1.3 Planned Maintenance Program ............................................................................................. 4

1.2 Responsibility Of Owners/Users .................................................................................................. 4

1.2.1 Deflection ................................ .............................................................................................. 4

1.2.2 Inspection & Maintenance ..................................................................................................... 5

1.2.3 Removal From Service .......................................................................................................... 5

1.2.4 Repairs ................................................................................................................................. 5

1.2.5 Operators .............................................................................................................................. 5

1.2.6 Before Operation ................................................................................................................... 5

1.2.7 During Operation ................................................................................................................... 5

1.2.8 Modifications Or Alterations................................................................................................... 5

1.3 Warranty ..................................................................................................................................... 6

2. Specifications ................................................................................................................................. 7

2.1 Model Specifications ................................................................................................................... 7

2.2 Lift Specifications ........................................................................................................................ 8

2.3 Load Capacity ................................ ............................................................................................. 8

2.4 Unbalanced Loading ................................................................................................................... 8

2.5 Pump Pressure ........................................................................................................................... 8

2.6 Lift Duty ...................................................................................................................................... 8

3. Safety ................................................................................................ .............................................. 9

3.1 Safety Signal Words ................................................................................................................... 9

3.2 Installation ................................................................................................................................... 9

3.3 Operation .................................................................................................................................... 9

3.4 Hydraulics ................................................................................................................................. 10

3.5 Maintenance ............................................................................................................................. 11

3.6 Modifications ............................................................................................................................. 11

3.7 Labels ....................................................................................................................................... 12

4. Installation .................................................................................................................................... 15

4.1 Remote Power Unit Installation ................................................................................................. 15

4.2 Power Unit Wiring ..................................................................................................................... 15

4.2.1 Contractor Remote Power Unit ............................................................................................ 15

4.2.2 Heavy Duty Remote Power Unit .......................................................................................... 15

4.3 Pit Installation ........................................................................................................................... 16

4.4 Surface Installation ................................................................................................................... 21

4.5 Shimming And Anchoring Lift To Concrete ................................................................................ 21

4.6 Bridge Lifting Chain Installation – Steel Bridge .......................................................................... 22

4.7 Bridge Lifting Chain Installation – Aluminum Bridge .................................................................. 23

4.8 Bridge Winch Installation – Steel Bridge ................................................................................... 24

4.9 Bridge Winch Installation – Aluminum Bridge ............................................................................ 25

4.10 Pit Modification & Installation for Mechanical Wheel Chock ...................................................... 26

4.11 Accordion Skirt Installation ........................................................................................................ 27

5. Operation ...................................................................................................................................... 28

5.1 Raise And Lower Lift ................................................................................................................. 28

5.2 Raise And Lower Bridge (hydraulic) .......................................................................................... 28

6. Maintenance ................................................................................................................................. 29

6.1 Maintenance Device ................................................................................................................. 29

6.2 Routine Maintenance ................................................................................................................ 31

6.2.1 Every Day Or 10 Hours Of Operation .................................................................................. 32

6.2.2 Every Month Or 100 Hours Of Operation............................................................................. 32

6.2.3 Every Year Or 1000 Hours Of Operation ............................................................................. 32

6.2.4 Oil Requirements ................................................................................................................ 33

6.2.5 Oil Capacity ......................................................................................................................... 33

6.3 General Maintenance ............................................................................................................... 33

6.3.1 Hydraulic Cylinder Repair ................................................................................................... 33

6.3.2 Bleeding Air From System .................................................................................................. 36

6.3.3 Hydraulic Velocity Fuse and Flow Control (VF/FC) Replacement ........................................ 36

6.3.4 Hose Orientation ................................................................................................................. 37

6.3.5 Schematics and Field Wiring Details ................................................................................... 38

6.3.6 Troubleshooting .................................................................................................................. 50

7. Parts Lists .................................................................................................................................... 54

1. INTRODUCTION AND WARRANTY

1.1 Introduction

Please read and understand this manual prior to installation or operation of this lift. Failure to do so could lead to property damage and/or serious personal injury. If you have any questions, call a local dealer or Autoquip Corporation at 1-888-811-9876 or 405-282-5200.

Please record the following information and refer to it when calling your dealer or Autoquip. Model Number:________________Serial Number: ___________________ Installation Date _____/_____/_____

1.1.1 Identification

When ordering parts or requesting information or service on this lift, PLEASE REFER TO THE MODEL AND SERIAL NUMBER. This information is on a nameplate attached to the leg assembly. Replacement parts are available from a local Autoquip distributor.

1.1.2 Inspection

Upon receipt of lift, perform a visual inspection to determine whether the lift has been damaged in transit. Any damage found must be noted on delivery receipt. In addition to this preliminary inspection, carefully inspect lift for concealed damage. Any concealed damage found that was not noted on delivery receipt must be reported in writing to the delivering carrier within 48 hours.

Use the following checklist for inspection of lift:

1. Examine entire unit for any signs of mishandling. Carefully check power unit and controls.

2. Thoroughly examine all connections, making sure they have not vibrated loose during transit, and inspect wiring for any signs of damage.

3. After installation, raise lift and inspect base frame, platform, scissors assembly, and cylinder plumbing connections.

1.1.3 Planned Maintenance Program

A local Autoquip representative provides a Planned Maintenance Program (PMP) for this equipment using factory-trained personnel. Call a local representative or Autoquip Corporation at 1-888-811-9876 or 405282-5200 for more information.

1.2 Responsibility Of Owners/Users

1.2.1 Deflection

It is the responsibility of user/purchaser to advise manufacturer where deflection may be critical to the application.

1.2.2 Inspection & Maintenance

Lift must be inspected and maintained in accordance with Autoquip’s operating/maintenance (O&M) manual and with other applicable safe operating practices.

1.2.3 Removal From Service

Any lift not in safe operating condition such as, but not limited to, excessive leakage, missing parts or fasteners, any bent or cracked structural members, cut or frayed electric, hydraulic, or pneumatic lines, damaged or malfunctioning controls or safety devices, etc. shall be removed from service until it is

repaired to the original manufacturer’s standards.

1.2.4 Repairs

All repairs must be made by a qualified technician in conformance with Autoquip’s instructions.

1.2.5 Operators

Only trained personnel and authorized personnel shall be permitted to operate lift.

1.2.6 Before Operation

Before using lift, operator must:

 Read and/or had explained, and understood, manufacturer’s operating instructions and safety

rules.

 Inspect lift for proper operation and condition. Any suspect item must be carefully examined and a

determination made by a qualified person as to whether it constitutes a hazard. All items not in conformance with Autoquip’s specification must be corrected before operating lift.

1.2.7 During Operation

Use lift in accordance with Autoquip’s O&M manual.

 Do not overload lift.  Verify all safety devices are operational and in place.  Autoquip warrants this lift for 60,000 cycles each warranty year. This number of cycles represents

normal, single shift duty. Exceeding this number of cycles shortens life of lift and length of your warranty.

1.2.8 Modifications Or Alterations

Modifications or alterations to this equipment may be made only with written permission of Autoquip. Unauthorized modification or alteration will void warranty.

AUTOQUIP CORP P.O. Box 1058, Guthrie, OK 73044-1058 Telephone: (888) 811-9876 ∙ (405) 282-5200 Fax: (405) 282-3302

www.autoquip.com

1.3 Warranty

The user is solely responsible for using this equipment in a safe manner and observing all of the safety

guidelines provided in the Owner’s Manual and on the warning labels provided with the lift. If you are

unable to locate either the manual or the warning labels, please contact Autoquip or access

www.autoquip.com for replacement downloads or information.

Autoquip Corporation expressly warrants that this product will be free from defects in material and workmanship under normal, intended use for a period of Two (2) Years for Labor and all electrical, mechanical, and hydraulic components, parts or devices, and warrants the structure of the lift against breakage or failure for a period of Five (5) years. The warranty period begins from the date of shipment. When making a claim, immediately send your dealer or Autoquip notice of your claim. All claims must be received by Autoquip within the warranty time period. The maximum liability of Autoquip, under this Limited Warranty, is limited to the replacement of the equipment.

This warranty shall not apply to any Autoquip lift or parts of Autoquip lift that have been damaged or broken in transit/shipping, or due directly or indirectly to misuse, abuse, vehicle impact, negligence, faulty installation, fire, floods, acts of God, accidents, or that have been used in a manner contrary to the

manufacturer’s limitations or recommendations as stated in the manual, or that have been repaired,

altered or modified in any manner outside of Autoquip Corp’s manufacturing facility or which have not

been expressly authorized by Autoquip. Autoquip Corporation makes no warranty or representation with respect to the compliance of any

equipment with state or local safety or product standard codes, and any failure to comply with such codes shall not be considered a defect of material or workmanship under this warranty. Autoquip Corporation shall not be liable for any direct or consequential damages resulting from such noncompliance.

Autoquip Corporation’s obligation under this warranty is limited to the replacement or repair of defective components at its factory or another location at Autoquip Corp’s discretion at no cost to the owner. This is owner’s sole remedy. Replacement parts (with exception of electrical components) will be warranted for a period of ninety (90) days. Except as stated herein, Autoquip Corporation will not be liable for any loss, injury, or damage to persons or property, nor for direct, indirect, or consequential damage of any kind, resulting from failure or defective operation of said equipment. All parts used to replace defective material must be genuine Autoquip parts in order to be covered by this Limited Warranty.

2. SPECIFICATIONS

Model

Travel

(inches)

Capacity

(lbs)

Platform

Width

(inches)

Platform

Length

(inches)

Lowered

Height

(inches)

Shipping

Weight

Approx.

(lbs)

Axle Load Capacity

Clevis End

(Bridge)

(lbs)

Roller End

(lbs)

Sides

(lbs)

PLTC-6050

5000

100

2800

3000

2500

6050A

5000

100

3300

3000

2000

6050S

5000

120

3400

2000

2500

6050B

5000

120

3400

2000

2250

6050K

5000

120

3600

2000

PLTC-6060

6000

100

3000

2500

6060A

6000

100

3400

3000

2000

6060S

6000

120

3400

2000

2500

6060B

6000

120

3500

2000

2250

6060K

6000

120

3600

2000

PLTC-6070

7000

4600

6400

6070A

7000

4780

6400

5400

6070S

7000

120

4800

6400

6070B

7000

120

4900

6400

6000

6070K

7000

120

5100

6400

5400

PLTC-6080

8000

4700

6400

6080A

8000

4890

6400

5400

6080S

8000

120

4800

6400

6080B

8000

120

5100

6400

6000

6080K

8000

120

5300

6400

5400

PLTC-60100

10000

100

4800

8000

6400

60100A

10000

100

4990

8000

5400

60100S

10000

120

4900

6400

60100B

10000

120

5200

6400

6000

60100K

10000

120

5400

6400

5400

PLTC-58120

12000

100

12.5

4900

10000

8000

58120A

12000

100

12.5

5100

10000

6400

58120S

12000

120

12.5

5300

8000

58120B

12000

120

12.5

4950

8000

7200

58120K

12000

120

12.5

5500

8000

6400

PLTC-58150

15000

100

12.5

4900

10000

8000

58150A

15000

100

12.5

5100

10000

6400

58150S

15000

120

12.5

5300

8000

7200

58150B

15000

120

12.5

4950

8000

58150K

15000

120

12.5

5500

8000

6400

2.1 Model Specifications

NOTES:

 All PLTC Models have a rollover capacity equal to twice the lifting capacity when in the fully lowered

position.

 All PLTC Models have (2) lifting cylinders.

2.2 Lift Specifications

There are many custom designs whose specifications may vary from those published for standard models. Please consult the specific General Arrangement (GA) Drawing to obtain the specifications for applicationspecific designs.

2.3 Load Capacity

Load capacity rating is stamped on a metal nameplate attached to lift. This figure is a net capacity rating for a lift furnished with a standard platform. If optional items are installed on lift after leaving manufacturer, deduct weight of these from load rating to obtain net capacity.

Do not exceed rated capacity of lift. Loading lift beyond its rated capacity is unsafe, will shorten operational life of lift, and will void warranty.

2.4 Unbalanced Loading

The stabilization provided is basically for balanced loads. If special attachments extend beyond the length and/or width dimensions of platform, end and/or side load capacity is reduced 2% for each one-inch extension from edge of platform. If load is rolling onto platform (in any but fully-lowered position) end and/or side load capacity is reduced by dividing the rated end/side load by 1.50 to establish an available “axle” load.

2.5 Pump Pressure

This lift incorporates a unique, positive displacement pump. Therefore, standard factory models of same manufacture cannot replace it.

Pump can operate efficiently at intermittent pressures up to 3200 PSI and continuous duty to 2500 PSI. The factory installed safety relief valve is factory-set to stay within parameters of pump and lift requirements.

2.6 Lift Duty

Autoquip warrants this lift for 60,000 cycles each warranty year. This number of cycles represents normal, single shift duty. Exceeding this number of cycles shortens life of lift and length of your warranty

It is the responsibility of the user to notify Autoquip whenever a specific application is likely to demand “above normal” duty from lift. Above normal duty typically requires supplemental design features to enhance serviceable life of lift and to avoid loss of warranty.

i DANGER

i WARNING

i CAUTION

NOTICE

i WARNING

3. SAFETY

3.1 Safety Signal Words

This Owner’s Manual covers PLTC lift models produced by Autoquip. Before installing, operating or servicing lift, you must read, understand and follow the instructions and safety warnings in this manual. Your lift may not be equipped with some optional equipment shown in this manual.

The safety information in this manual is denoted by the safety alert symbol: i

The level of risk is indicated by the following signal words.

DANGER – Indicates a hazardous situation, which, if not avoided, will result in death or serious injury.

WARNING – Indicates a hazardous situation, which, if not avoided, could result in death or serious injury.

CAUTION – Indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.

NOTICE – Indicates a situation that could result in damage to

the lift or other property.

3.2 Installation

Do not install lift in a pit unless lift has a bevel toe guard or other approved toe protection. A shear point can exist which can cause severe foot injury. Lift platforms traveling below floor levels may create a toe hazard as load passes top edge of pit. This may require guarding in accordance with Federal Regulations. Guarding must be installed prior to operating lift.

Prevent serious injury or death. Depending on model, standard weight of lift ranges from 2800 – 5500 lbs. Use a properly rated lifting device to move and install lift.

3.3 Operation

i WARNING

i CAUTION

i WARNING

Prevent serious injury or death. Scissor lifts are designed for a specific load and application. Do not

change load or application from original design. Overloading, or uneven loading, could result in load instability and cause

serious personal injury. Stay clear of lift while lift is in motion. Never stand, sit or ride on lift unless equipped with OSHA-compliant

personnel guarding on the platform.

Prevent serious injury or death. Lifts which travel to an elevation above floor level where distance between

floor and the underside of lift platform exceeds 66" must have the scissors mechanism guarded per ANSI MH29.1.

3.4 Hydraulics

Fluids can be hazardous. Before servicing lift, check Material Safety Data Sheet (MSDS) to understand the product, safe handling procedures, and first aid measures relating to product. Follow this information when servicing or repairing lift.

Do not drain or pour any fluids or lubricants into ground. Check with local environmental agencies, recycling centers, or your Autoquip dealer for correct disposal information.

Any time velocity fuses have been tripped, investigate cause of trip and verify necessary corrective actions have been taken prior to operation of lift.

Prevent serious injury or death. Do not attempt to remove Hydraulic Velocity Fuse (HVF) until maintenance

device securely supports lift and all hydraulic pressure has been relieved. HVF is attached to elbow fitting in pressure port of cylinder. Do not use a

swivel fitting between HVF and cylinder. If HVF is installed improperly, it will not lock up in event of a hydraulic line failure.

i WARNING

Pressurized fluids can penetrate the skin. Hydraulic hoses can fail from age, damage and exposure. Do not search for hydraulic leaks without body and face protection. A tiny,

almost invisible leak can penetrate the skin, thereby requiring immediate medical attention.

Use wood or cardboard to detect hydraulic leaks, never your hands.

Spilled fluids and lubricants may be slippery and may also present a fire hazard.

Clean up spilled fluids and lubricants.

3.5 Maintenance

Prevent serious injury or death. Disconnect and/or lock out electrical supply to power unit prior to any

maintenance being performed.

Prevent serious injury or death. Never go under lift platform until load is removed and scissors

mechanism is securely blocked in raised position with maintenance devices.

3.6 Modifications

Prevent serious injury or death. Do not modify lift. Autoquip cannot foresee and is not responsible for

injury or damage which results from unauthorized modifications or misuse of lift.

3.7 Labels

i WARNING

To protect against death or serious injury, all labels must be on lift and must be legible.

If any of these labels are missing or cannot be read, call Autoquip for replacement labels.

1 – DECAL_CAPACITY

2 – 36430050

3 – 36401487

4 – 36401560

5 – 06100010

6 – 36403225

7 – 36400265

8 – 36400257

9 – 36403720

10 – 36433670

Motor Details

Full Load Amps

RPM

Time Rating

115V

208V

230V

460V

60 1 1725

2 Min.

33.6

16.8

60 1 1800

2 Min.

25.2

23.0

5 (Contractor )

60 3 3450

2 Min.

15.8

14.8

7.4

5 (Vertical HD)

3475

2 Min.

16.0

15.2

7.6

5 (Continuous)

1760

Continuous

13.6

12.6

6.6

4. INSTALLATION

4.1 Remote Power Unit Installation

1. The remote power unit is to be located in an area protected from the elements and should be installed prior to the lift to facilitate lift operation during installation into the pit.

2. The remote contractor power unit is equipped with power unit mounting brackets and can be wall or floor mounted using these brackets. If equipped with a vertical power unit, optional power unit mounting brackets must be used for wall mounting.

3. The electrical work is to be done in accordance with local codes by a qualified electrician. See the “Maintenance” section for the standard wiring diagram.

4. If permanent electrical work is not complete, some means of temporary power with an on/off device for the motor will be required.

5. Fill the reservoir with oil per instructions in the "Maintenance” section.

4.2 Power Unit Wiring

4.2.1 Contractor Remote Power Unit

1. The Contractor Power Unit utilizes a 5 HP / 208-230-460 Volt / 60 hertz / 3 phase “Super-Torque” intermittent duty motor with (one full lift cycle per 2 minute period) driving a high pressure positive displacement pump assembly with an internal relief valve, check valve and down solenoid valve.

2. Because an Autoquip "Super-Torque" motor actually delivers substantially more horsepower than the nameplate rating, it must always be wired for heavier current-draw than standard motors of the same nameplate rating. However, because of the "Super-Torque" motor’s starting efficiency and superior running characteristics, circuit components do not have to be as large as for standard motors of equal delivered horsepower.

4.2.2 Heavy Duty Remote Power Unit

1. The Vertical 'HD' Power unit utilizes a 5 HP/ 208-230-460 Volt / 60 hertz / 3 phase Heavy Duty motor, (with a 30 minute continuous duty rating). The power unit is coupled with a high-pressure positive displacement gear pump, and Autoquip Corporation’s patented Deltatrol valve assembly.

2. The motor connection diagram should be referenced in connecting the motors to a power source. Remember that heavy wire must be used all the way to the power source.

NOTE: For larger horsepower motors, consult factory.

Prevent serious injury or death.

i WARNING

Electrical service installation must be performed by a licensed electrician and conform to all local and national electrical codes.

4.3 Pit Installation

Do not install lift in a pit unless lift has a bevel toe guard or other approved toe protection. A shear point may exist which can cause severe foot injury.

Lift platforms traveling below floor levels may create a toe hazard as load passes top edge of pit. This may require guarding in accordance with ANSI MH29.1. Guarding must be installed prior to operating lift.

1. Check pit dimensions (Reference drawing 82600431 below). Pit should be 2" longer and 2” wider than lift platform to allow a 1” gap between platform and pit. Pit depth should allow ½” for shims or grout.

2. Conduit diameter must be a minimum of 3" with long radius sweeps for necessary hydraulic hosing and field wiring.

3. Verify installation area is clean before starting. Check mounting surface of pit floor with a level or straight edge. If floor is not level, add shims or grout under entire perimeter of base to achieve a level and flat base installation. A level base is essential for proper wheel tracking and smooth lift operation.

Prevent serious injury or death. Depending on model, standard weight of lift ranges from 500 – 4700 lbs.

Use a properly rated lifting device to move and install lift.

PLT Pit Detail

See Pit Installation Notes

Up to 25 feet

½” ID

26 feet to 50 feet

¾” ID

Over 50 feet

1” ID

4. Make temporary hose connections with high-pressure hose (see chart below) to allow the lift to be operated when it is set in the pit.

5. Temporarily connect electrical service and hydraulic hoses. The hose connection on the end of the base frame is 1/2" female NPT.

Hydraulic Piping/Hose Size

6. Fittings have been provided to extend the hose connection outside the bevel toe guard. Point the elbow toward the pipe chase in the pit.

7. Check the routing of the temporary hydraulic lines to assure that the hose is clear of legs, base frame, and platform when lift is in the lowered position.

8. Using 3/4-10 UNC eyebolts and a chain spreader, place the lift into the pit as illustrated below.

Lifting and Installation

i CAUTION

i WARNING

9. Check for proper height. Lift must be solid and flush with pit curb angle framing (D). If needed, shim to desired height. DO NOT “spot” shim. Shim along full length of frame. This will prevent frame from sagging under load.

10. Remove the shipping bolt and eye bolts from the lift and hydraulically raise the platform.

Failing to remove the shipping bolts before operation will cause permanent damage to the lift.

11. Fill hydraulic reservoir with proper type and volume of fluid.

12. Press “UP button and raise lift one foot.

13. Press “DOWN” button to fully lower lift. Continue to hold down button for 60 seconds. Repeat procedure five to seven times to bleed air out of hydraulic system.

14. Raise and lower lift as needed to make positioning adjustments.

15. Adjust platform to a clearance of 1” minimum around perimeter between platform and pit angle.

NEVER go under a raised lift platform until load is removed and lift is securely blocked in raised position with maintenance devices.

See "Maintenance Device" section of this manual. Lock-out/tag-out power source.

16. Base frame of lift has pre-drilled holes for anchoring to the floor. Anchor lift to floor. Lifts with oversize platforms have minimum pull out requirements of 2,000 lbs. for each anchor. See “Shimming And Anchoring Lift To Concrete”.

17.

18. Make permanent electrical and hydraulic connections and operate lift through a few cycles.

19. Clean up debris and spilled oil from area. Dispose of oil in an environmentally safe manner.

20. Touch-up paint is available from Autoquip for repair of damaged paint surfaces.

21. Train personnel on lift operation, all safety features and procedures.

NOTICE

4.4 Surface Installation

Surface installation procedures are the same as for pit installation instructions with the following consideration:

The surface area where the lift will be set must be flat and level

and be of sound concrete of sufficient thickness to support the lift while loaded at full capacity. Asphalt is not sufficient support for the lift.

22.

4.5 Shimming And Anchoring Lift To Concrete

Recommended concrete anchor bolts are: HILTI “Kwik-Bolt”, Molly Parabolt or similar.

1. Verify lift is positioned correctly.

2. Raise the platform and install the maintenance leg (see “Maintenance Device Instructions” section).

3. Drill holes in concrete as specified by anchor bolt manufacturer.

4. Install and tighten anchors as specified by anchor bolt manufacturer.

5. Each lag bolts should be able to withstand 2000lbs. minimum upward pull.

6. After lift has been aligned, leveled and shimmed, and anchors have been installed, pour grout under entire base frame.

7. When grout has set and cured, tighten nuts on anchor bolts.

8. Route hydraulic hose or electrical cord through conduit in pit wall.

4.6 Bridge Lifting Chain Installation – Steel Bridge

4.7 Bridge Lifting Chain Installation – Aluminum Bridge

4.8 Bridge Winch Installation – Steel Bridge

4.9 Bridge Winch Installation – Aluminum Bridge

4.10 Pit Modification & Installation for Mechanical Wheel Chock

4.11 Accordion Skirt Installation

1. Position platform in raised position. Engage maintenance device (see “Maintenance Device”

section). Remove the handrails. Position accordion with weight rod pocket at bottom and mounting collar at top. The breathable material when provided must be positioned at top of skirt with mounting collar.

2. Slip skirt over end of platform. Turn skirt as required to slide over other end of platform and leg

assembly. The skirt should be in position under platform while enveloping base assembly.

3. Select from the following mounting configurations.

Raise one side of skirt along with a skirt-mounting bar (1/8” x 1”) to side of bevel toe guard. When possible, center skirtmounting collar and skirt-mounting bar (1/8” x1”) on platform.

Align pre-drilled holes in platform with skirt-mounting bar holes and punch holes in skirt-mounting collar.

Push a nylon drive rivet through each hole in skirt-mounting bar. Hammer aluminum pin into rivet until flush with rivet head. Repeat mounting process for remaining sides of accordion skirt.

Bevel Toe Guard (Typical)

Platform Side Under Platform

4. Install weight rods into weight rod pockets at bottom of accordion skirt. Install spring tempered wire

rods into pocket of black convolutions.

i WARNING

NOTICE

5. OPERATION

5.1 Raise And Lower Lift

Prevent serious injury or death. Before operating lift, all personnel interacting with lift must read, understand

and follow instructions and safety warnings in this manual.

Personnel must maintain a safe operating distance of at least 36” any time

lift is operated.

Adjusting safety relief valve may result in premature motor failure. Do not adjust safety relief valve. Raising loads exceeding rated capacity of lift may result in excessive wear and

damage to lift. For lifts supplied with throw-over bridges, make sure bridges are in the stored

(raised) position prior to raising or lowering the lift, and when backing up trucks for loading/unloading - to ensure that the bridges will clear all possible obstructions and contact with a moving truck.

1. Verify all personnel are clear of lift.

2. Press “UP” button to raise lift. Release button when lift reaches desired position.

Do not operate lift on relief for more than a few seconds. When on relief, valve will make a squealing sound.

3. Press "DOWN" button to lower lift. Release button when lift reaches desired position.

5.2 Raise And Lower Bridge (hydraulic)

If your lift has a hydraulically operated throw over bridge (TOB), it is equipped with UP/DOWN buttons and a FLOAT switch. The FLOAT switch must be set to “LOCK” for the UP/DOWN buttons to work. The UP/DOWN operate just as the lift UP/DOWN. The FLOAT switch is to be used when the bridge is resting on the truck bed. The “FLOAT” mode allows the bridge to float up or down with the truck. This prevents damage to the equipment when loads are being moved across the bridge.

Note: Bridges that hang below 45 degrees are in violation of ANSI Standard MH29.1-2012 paragraph

4.12.2 which states “When a hinged bridge is in its fully lowered position and not resting on a truck bed or landing, it should hang down at an angle not to exceed approximately 45 degrees from horizontal.…”

Autoquip’s standard is to allow 20° of drop below horizontal.

i WARNING

6. MAINTENANCE

6.1 Maintenance Device

NEVER go under a raised lift platform until load is removed and lift is securely blocked in raised position with maintenance device.

Lock-out/tag-out power source.

This procedure describes the only factory-approved method of working under a lift. Follow these instructions EVERY time you plan to reach or crawl beneath the lift to perform service or maintenance – no matter how momentary that might be.

If the factory-provided maintenance device is damaged or missing, stop immediately and consult the factory for assistance. The manufacturer is not liable for your failure to use the approved maintenance device and procedures that have been provided.

1. All loads must be removed from the lift prior to engaging the maintenance device. These devices are designed to support an unloaded lift only. Failure to remove the load from the lift prior to blocking could cause the failure of the maintenance device and allow the lift to fall unexpectedly. This can result in personal injury or death.

2. Raise the lift to its fully raised position. If you do not, the maintenance device may not be able to be placed properly in its designed blocking position.

3. The lift will be provided with one (1) maintenance device stored at the clevis end of the lift (either under the platform or between the legs). The device must be securely placed inside the leg socket on the base frame. (See Figure 6.1).

4. Lower the lift platform until it comes down and makes contact with the maintenance leg. The maintenance leg should be centered in maintenance leg collar located underneath the platform on the clevis end. Re-check to ensure that the maintenance leg device is inside the maintenance collar and in contact with the platform deck surface. If the maintenance leg is not fully engaged the lift could fall unexpectedly, resulting in permanent damage to the device or the lift.

Figure 6.1

i DANGER

i WARNING

i DANGER

i WARNING

If for any reason you are unable to lower the lift completely onto the maintenance devices, stop immediately and consult the factory. Failure to properly use the factory approved maintenance devices could result in severe injury or death.

5. Once the maintenance device is properly and securely engaged, continue to press the down button, valve or switch for an additional 5-10 seconds to relieve all pressure in the hydraulic system (it could take longer in a pneumatic system).

Failure to relieve operating system pressure could result in the sudden and unexpected release of high-pressure fluids (or air) during maintenance and/or repair of the lift, resulting in severe injury or death.

6. Follow OSHA electrical lock-out/tag-out procedures. Disconnect and tag all electrical and/or other power sources to prevent an unplanned or unexpected actuation of the lift.

7. Once inspection or work is complete, reverse the performance of the steps above to raise the lift off the maintenance locks and place the locks back into the designated storage position.

HIGH VOLTAGE!! – Disconnect and/or lock out the electrical supply to the power unit per OSHA regulations prior to any installation or maintenance being performed.

6.2 Routine Maintenance

Prevent serious injury or death. Lock-out/tag-out power source prior to any maintenance

being performed.

Prevent serious injury or death. Never go under lift platform until load is removed and scissors

mechanism is securely blocked in raised position with maintenance devices.

See Maintenance Device section.

Pressurized fluids can penetrate the skin.

i WARNING

Hydraulic hoses can fail from age, damage and exposure. Do not search for hydraulic leaks without body and face protection. A tiny, almost invisible leak can penetrate the skin, requiring immediate medical attention.

Use wood or cardboard to detect hydraulic leaks, never your hands.

Spilled hydraulic fluid is slippery and may also present a fire hazard.

Clean up spilled hydraulic fluid.

Normally, scissor lifts will require very little maintenance. However, a routine maintenance program could prevent costly replacement of parts and/or downtime.

6.2.1 Every Day Or 10 Hours Of Operation

 Check reservoir fluid level.  Check for fluid leaks.  Check all hoses and electrical cords for cracks, abrasions, twisting, etc. Small leaks at connections

can be remedied by tightening connections or replacing faulty component.

 Check that oil pressure does not exceed 3,000 psi.  Check all pivot joints & roller bearings for noise and wear.  Check overall condition of unit (i.e. bends, breaks, loose or missing screws, etc.). 

6.2.2 Every Month Or 100 Hours Of Operation

 Check quality of oil. Replace if discolored (oxidized), cloudy, or otherwise contaminated. Do not

overfill reservoir. Always use clean fluid.

 Inspect lift cylinder rods for scoring and leaking, wipe away any foreign material.  Inspect all structural and mechanical components for cracked or broken welds and any distortion

caused by collision, overloading, or other misuse.

 Inspect snap rings/bolts at rollers & pivot points for proper retention & tightness.  Inspect cylinder trunion pin for proper retention.

When all checks have been completed, start unit and operate through all functions. Inspect all components for signs of noise, vibration, erratic movement, and any other abnormal behavior.

6.2.3 Every Year Or 1000 Hours Of Operation

 Change oil and clean reservoir. Always use clean fluid. Never return fluid from drip pans, pit, etc.

back to reservoir. Dispose of and handle used fluid as a hazardous material.

 If noise or vibration has been noticed, remove lift cylinder pins, pivot pins, and roller bearings.

Inspect for wear and replace as necessary.

 Inspect all hydraulic hoses. Replace any that show signs of wear or leaking.  Replace all filters.  Check for permanent mechanical deformation.

Environment (Ambient Temperature)

Recommended Oil

Indoor locations with variable temperatures: 30 - 100 degrees F.

5W 30 or 5W 40 Multiviscosity Motor Oil

Indoor locations with constant temperatures: 60 - 80 degrees F.

SAE 20 Motor Oil

Outdoor locations: 30 - 120 degrees F.

5W 30 or 5W 40 Multiviscosity Motor Oil

Outdoor locations: 10 degrees F below 0 to 100 degrees F.

5W 20 or 5W 30 Multiviscosity Motor Oil

Cold Storage Warehouse: 10 - 40 degrees F.

Contact local Autoquip Service Rep.

NOTICE

6.2.4 Oil Requirements

Follow recommendations below that apply to your application.

Note: All oils are detergent type.

6.2.5 Oil Capacity

*Contractor Polyethylene Tank: Oil capacity is approximately: (5.5) gallons or (22) quarts. *Vertical Steel Tank: Oil capacity is approximately: (10) gallons or (40) quarts. *Large Vertical Steel Tank: Oil capacity is approximately: (12) gallons or (48) quarts. Steel Tube Tank for Internal Power Units: Oil capacity is approximately (2) gallons or (8) quarts.

* Oil level should be 1" to 1-1/2" below the top of the reservoir.

Use approved fluids only. Use of unauthorized fluids may

Do Not Use:

 Automatic Transmission Fluid (ATF)  Hydraulic Jack Oil  Brake Fluids

cause damage to seals and hosing.

6.3 General Maintenance

6.3.1 Hydraulic Cylinder Repair

6.3.1.1. Cylinder Removal

1. Raise lift to its full height and engage maintenance device. See “Maintenance Device” section.

2. Disconnect electrical power to lift. Follow lock out-tag out procedure.

3. Disconnect cylinder hose at the tee connection on the Base assembly.

Place the open end of the hose in a container to receive oil spillage.

4. Remove the setscrew or hex bolt in the cylinder upper leg clevis

(otherwise known as the Trunnion clevis).

5. Secure the cylinder from dropping on the floor. Remove the cylinder pin

from the upper leg clevis.

6. Lift the cylinder out of the leg assembly.

7. Push the piston rod into the cylinder to eject as much oil as possible into a container.

6.3.1.2. Replace Cylinder Seals

1. Insert spanner wrench and turn upper bearing assembly clockwise until tip of retainer appears in slot.

2. Place a small screwdriver under retainer and turn retainer to remove.

3. Be sure hose port is open to allow air into cylinder. Pull piston rod out to remove upper bearing.

4. After all internal components have been removed, inspect inner walls of barrel. Use a cylinder hone to remove any apparent nicks or scratches. Clean and flush barrel after honing.

5. Remove piston head nut from rod. Upper clevis and pin may be used to prevent rotation of rod while loosening. Remove old piston.

6. Inspect groove for nicks or scratches that could affect seal or barrel walls; remove as necessary.

Figure 6.3 – Cylinder Seals

NOTICE

7. Install new piston, seals, and rod wiper.

8. Install and tighten piston head nut to 325 ft•lb of torque. Upper clevis and pin may be used to prevent rotation of rod while tightening.

9. Liberally lubricate piston and seal with clean grease or oil.

10. Insert piston into barrel, taking care not to damage seal.

11. Slip bearing assembly into place and align retainer hole with slot in barrel.

12. Turn bearing with spanner wrench until retainer is reinserted completely.

6.3.1.3. Placing Cylinder Back Into Service

Loctite PST #567 pipe thread sealant or equivalent is recommended.

Do not use Teflon tape on hydraulic threaded connections.

Tape fragments may damage hydraulic system.

Autoquip recommends replacing any NPT fittings that have been disassembled due to their inherent design for sealing.

1. Check that lift anchors are tight (when used). Check all pins and other mechanical and hydraulic connections.

2. Restore oil level. See oil recommendations in “Oil Requirements” section.

3. Turn on electrical power and press “UP” button. Loosen bleeder plug at the top end of ram casing and operate pump to remove trapped air from ram. When clear oil appears, tighten plug and raise lift slightly to disengage maintenance locks.

4. Lower lift completely and hold “DOWN” button for 60 seconds to allow air in cylinders to bleed back into reservoir.

5. See “Bleeding Air From System” section

6.3.2 Bleeding Air From System

1. Bleed air from system by raising lift 25-50% of full travel, then lower completely.

2. Hold “DOWN” button for 60 seconds.

3. Repeat procedure 8-10 times. If this does not bleed all air from system, contact Autoquip.

4. Clean up any spilled oil. Dispose of spilled oil in an environmentally safe manner.

6.3.3 Hydraulic Velocity Fuse and Flow Control (VF/FC) Replacement

i WARNING

NOTICE

Prevent serious injury or death. Never go under lift platform until load is removed and scissors

mechanism is securely blocked in raised position with maintenance devices and hydraulic pressure is relieved.

The VF/FC is attached to elbow fitting in rod port of cylinder. Do not use a swivel fitting between VF/FC and cylinder. If VF/FC is installed improperly, it will not protect in the event of a hydraulic line failure.

1. Arrow on VF/FC indicates direction of oil flow restriction. VF/FC must be installed with arrow pointing away from cylinder.

Do not use Teflon tape

on hydraulic threaded connections. Tape fragments may damage hydraulic system. Autoquip recommends replacing any NPT fittings that have been disassembled due to their inherent design for sealing.

2. Apply Loctite PST #567 pipe thread sealant or equivalent to threads and install fuse to cylinder with arrow pointing away from cylinder. Tighten fuse.

3. Fill reservoir to full mark if necessary with proper oil.

4. Check all fitting connections for hydraulic leaks and tighten as necessary.

5. Bleed air from system. See “Bleeding Air From System” section.

6.3.4 Hose Orientation

To prevent damage to cylinder hoses, it is necessary to establish a correct hose shape and pattern of movement as follows:

1. Raise lift to its full height and block securely. See “Maintenance Device”.

2. Install one end of new hose to cylinder fitting.

3. Since hose is fixed at both ends, it is possible to put a twist in hose that will allow it to follow the same pattern each time lift is operated. This twist will allow hose to travel about half way between cylinder on right side and inner leg on right side.

4. Lower lift carefully and verify hose is free and clear of cylinder and inner leg assembly. If not, twist hose in direction necessary to clear any obstruction and tighten swivel fitting.

6.3.5 Schematics and Field Wiring Details

Electric Schematic; 5HP/ 3Ph Contractor or Vertical Power Unit

Electric Schematic; 5HP/ 3Ph Continuous Running Vertical Power Unit

Electric Schematic; 5HP/ 1Ph/230V Vertical Power Unit

Electric Schematic; 3HP/ 1Ph/115V Vertical Power Unit

Hydraulic Schematic – Contractor Power Unit

Hydraulic Schematic – Vertical Power Unit

Hydraulic Schematic – Continuous Running Vertical Power Unit

Push Button Wiring Diagram

Guarded Foot Switch Wiring Diagram

Guarded Foot Switch Assembly

Optional Limit Switch Mounting Diagram – PLTC-6050 to 6060

Optional Limit Switch Mounting Diagram – PLTC-6070 to 58150

6.3.6 Troubleshooting

i WARNING

Prevent serious injury or death. Disconnect and/or lock out electrical supply to power unit prior to any

maintenance being performed.

Prevent serious injury or death. Never go under lift platform until load is removed and scissors

mechanism is securely blocked in open position. Follow OSHA lock-out/tag-out procedure.

See "Maintenance Devices" section.

Pressurized fluids can penetrate the skin. Hydraulic hoses can fail from age, damage and exposure. Do not search for hydraulic leaks without body and face

protection. A tiny, almost invisible leak can penetrate the skin, thereby requiring immediate medical attention.

Use wood or cardboard to detect hydraulic leaks, never your hands.

Spilled hydraulic fluid is slippery and may also present a fire hazard.

Clean up spilled hydraulic fluid.

PROBLEM

POSSIBLE CAUSE AND SOLUTION

Lift Does Not Raise.

Motor rotation for a 3-phase motor may be reversed. Reverse two motor electrical leads.

Check for line or hose leak. Check for low oil in reservoir. Add specified oil as necessary. Load may exceed rating. See the Specifications section. Remove excess load. Suction screen may be clogged, starving pump. Remove and clean screen. Drain

and replace oil. Suction line may be leaking air due to a loose fitting. Tighten as needed.

Breather holes in reservoir fill plug may be clogged. Remove and clean. Voltage may be too low to run pump with existing load. Check by measuring

voltage at motor terminals, or as near as possible, while pump is running under load. Inadequate or incorrect wiring can starve motor when source voltage is ample. Correct as necessary.

Down valve may be energized by faulty wiring or stuck open. Remove solenoid and check.

Motor may be single phasing. Check wiring, fuses, etc. Pump may be seized if motor is humming or blowing fuses on overload protection

devices. Remove pump. Pump can be rotated by hand unless seized. Check for cracks in housing.

Down solenoid valve stem may be bent, causing valve to stick open. Replace down solenoid valve.

Lift Raises, Then Lowers Slowly.

Down solenoid may not be seating. Remove solenoid coil and check. If lift does not hold with solenoid coil removed, remove and clean down valve cartridge or replaced as necessary.

Oil line, hose, or fitting may be leaking. Check and repair if necessary.

Check valve in pump assembly may not be seating. This is indicated by pump shaft and motor turning backward on their own with no power applied. Generally, this condition can be heard. Replace pump assembly.

Lift Lowers Slowly.

Down solenoid is not operating properly due to debris or damage.

Check for pinched tubing or hose. Where pipe is used, check for obstruction in line.

Thick oil due to low ambient temperatures. Add or replace with lower weight oil that stays thin in cold conditions (5W-15, etc.)

If foam is visible in tank oil, check for loose connection in suction line between pump and tank. Tighten connections.

PROBLEM

POSSIBLE CAUSE AND SOLUTION

Lift Does Not Raise,

Continued.

PROBLEM

POSSIBLE CAUSE AND SOLUTION

Lift Won’t Lower.

Solenoid coil may be incorrectly wired, burned out, not rated for the

voltage, or line voltage may be excessively low. Check voltage near

coil.

Velocity fuse may be locked. Do not attempt to remove the velocity

fuse. The following steps should be followed:

1. Remove load from lift. Inspect all fittings, hoses, and other hydraulic components for leaks or damage.

2. If no leak or damage is noticed, attempt to pressurize lifting cylinder by pressing “UP” button on controller for a few seconds. Immediately

release “UP” button and press “DOWN” button. If lift starts to lower,

continue pressing “DOWN” button until lift is fully lowered.

3. If lift does not lower after trying Step 2, wait approximately 10 – 15

minutes for pressure in hydraulic system to equalize. Then, press

“DOWN” button until lift is fully lowered.

4. Once lift is fully lowered, hold “DOWN” button for approximately 60

seconds to bleed air from system. This step may need to be repeated

several times to fully remove air in system by raising the lift to 50% of

its travel and lowering.

If above steps do not correct problem, contact Autoquip to obtain

instruction for further action.

PROBLEM

POSSIBLE CAUSE AND SOLUTION

Lift Seems Bouncy During

Operation.

Lower lift to closed position and continue to hold “DOWN” button an

additional 10-30 seconds to bleed air from cylinder. Do not confuse

spongy or jerky operation with small surges that may occur when

operating on rough or uneven floors.

Check for oil starvation.

Motor Labors Or Heats

Excessively.

Voltage may be low. Check voltage at motor terminals while pump is

running under load, not at line source or while pump is idling. Inadequate

wiring can starve motor even when source voltage is ample.

Most of Autoquip’s standard motors are rated for intermittent duty. If a

single-phase motor is being run more than 15 – 20 motor starts per hour,

or a 3-phase motor more than 200 starts per hour, the problem may be

motor over-heating.

Running against relief pressure unnecessarily due to over loaded lift or

hitting physical stops.

Failure to observe wiring diagram on nameplate for proper voltage

connections.

Pump may be binding from oil starvation, which develops high internal

heat. Check for low oil level or clogged breather holes in reservoir fill

plug. Pump can be damaged by oil starvation.

7. PARTS LISTS

Contractor Power Unit

Vertical Power Unit

Continuous Running Vertical Power Unit

Autoquip PLTC-6050B, PLTC-6050S, PLTC-6050, PLTC-6050K, PLTC-6060A Installation, Operation And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual