stellar labs 5520 - User Manual

Other manuals for stellar labs 5520

Manual18 pages

Questions and Answers

A
April WadeAug 15, 2025
Why stellar labs 5520 crane will not operate?
- P
  peggy70Aug 15, 2025
  The crane may not operate because the parking brake is not engaged, or the PTO is not engaged. Ensure the transmitter batteries are fully charged. Also, ensure there is 12V power going to the radio receiver, and if not, trace back to the power source to check for a blown fuse or loose ground connection. Check that the hydraulic pump is operating at its rated flow (GPMs); if the pump is weak, contact Stellar Customer Service.
B
Brittney CrossAug 18, 2025
What to do if Stellar Labs Construction Equipment crane operates slowly?
- S
  Scott MorganAug 18, 2025
  If the crane operates slowly, ensure it is receiving the recommended hydraulic flow. Check the hydraulic fluid level in the reservoir and add fluid if needed. Also, check the hydraulic fluid temperature. Make sure the proportional valve is receiving 12V power when fully engaging the transmitter trigger; if not, check for loose connections inside the transmitter or replace the handle trigger assembly. The valve bank orifice may be plugged; if so, replace it and call Stellar Customer Service for instructions.
R
Rebecca JimenezAug 21, 2025
What to do if stellar labs 5520 Construction Equipment crane only operates at full speed?
- R
  Raven MendozaAug 22, 2025
  If the crane only operates at full speed, check to see if there is 12V power constantly going to the proportional valve. If 12 volts are present at the proportional valve without pulling on the transmitter trigger, the system handle/trigger assembly may be defective. Also, check if the manual override on the proportional valve is turned out; turn the manual override on the flow valve in. If 8 volts are present at the proportional valve, the valve may be stuck open and will not close; remove the valve, clean it thoroughly, and reinstall.
G
grace64Aug 25, 2025
How to troubleshoot Stellar Labs Construction Equipment crane that operates manually but not by radio remote?
- S
  Sara PenaAug 26, 2025
  If the crane operates manually but not by radio remote, first, ensure there is 12V power going to the radio receiver. If there is no power, trace back to the power source and check for a blown fuse or loose ground connection. Make sure that the parking brake is engaged and that the parking brake switch is working properly by performing a continuity test; if the switch is defective, replace it.
M
Miranda ParkAug 28, 2025
What to do if Stellar Labs Construction Equipment cylinder drifts outward or downward?
- C
  Christine RamirezAug 28, 2025
  If the cylinder drifts outward or downward, check to see if there is air in the hydraulic system by operating all cylinders connected to the hydraulic system. Also, make sure the holding valves are operating properly. Remember to relieve hydraulic oil pressure from all hydraulic circuits before performing any maintenance on hydraulic components.
C
Christopher ComptonAug 31, 2025
What to do if Stellar Labs Construction Equipment winch will not hold load?
- R
  Richard TrujilloAug 31, 2025
  If the winch will not hold a load, ensure the lifted object does not exceed the winch's rated capacity, referring to the capacity chart. Also, verify the limit switch is working correctly by disconnecting and tying together the two wires connected to it; if all functions then operate, replace the limit switch. Additionally, ensure the relief valve on the winch is set correctly and readjust it if necessary.
J
Jerry GoldenSep 4, 2025
What to do if not all Stellar Labs Construction Equipment crane functions operate using the radio remote transmitter or crane operates intermittently?
- M
  marysmithSep 4, 2025
  If not all crane functions operate using the radio remote transmitter, or if the crane operates intermittently, ensure the toggle switch is working properly and replace it if defective. Also, check that there is power going to the valve bank coil solenoid of the function that will not operate. If no power is going to the coil solenoid, check wiring connections on the wire harness plug connector for broken wires, loose connections, or poor crimps. If power is present, the solenoid valve may not be opening; remove the stem valve, thoroughly clean, lubricate, and reinstall it, being careful not to overtighten. Replace the valve if it will not close.
L
Lisa JohnsonSep 7, 2025
What to do if stellar labs 5520 two functions operate at the same time while only toggling one function?
- P
  Pamela MorrisSep 7, 2025
  If two functions operate simultaneously while only toggling one, make sure that the solenoid valves are all latched in the center position to prevent movement during crane operation. Determine the function operating on its own and check for power going to its solenoid valve from a function that should not be operating. If voltage is present without operating the function, the toggle switch has failed and is stuck in the 'on' position. If no voltage is present, the solenoid valve may be partially open; remove, clean, lubricate, and reinstall the stem valve, avoiding overtightening, and replace it if it does not close.
L
leekarlSep 12, 2025
Why stellar labs 5520 Construction Equipment winch brake will not hold?
- R
  Ryan FreemanSep 12, 2025
  If the winch brake will not hold, check to see if the back pressure on the return line of the winch is greater than 50 psi. Try operating a function other than the winch, operating the function both ways and then stopping.

Summary

Chapter 1 - Safety

Stability and Load Safety

Critical safety aspects regarding crane stability and load handling.

Electrical and Environmental Hazards

Operational and Training Hazards

Specific Hazard Warnings

Details on hazards related to boom movement, blocking, and stabilizers.

Operational Warnings and Instructions

Chapter 2 - Operation

Pre-Operation Inspection

Daily checks to ensure the crane is safe and ready for operation.

Positioning the Stabilizers

Detailed steps for extending and lowering stabilizers for stability.

Crane Operation Procedures

Comprehensive guide to operating the crane, including unstowing, load handling, and radio remote use.

Radio Remote Control Functions

Detailed explanation of buttons and toggles on the radio remote control unit.

Chapter 3 - Maintenance

General Maintenance Procedures

Crane Maintenance Schedule

Table outlining routine maintenance operations and their frequency.

Hydraulic Oil;Filter Maintenance

Rotation Gear Bearing Maintenance

Procedures for lubricating worm gear, open gear teeth, and inner gear bearing race.

Lubrication Recommendations

Detailed table of lubrication types and frequencies for crane components.

Chapter 4 - Troubleshooting

Common Operation Issues

Solutions for crane not operating, radio remote issues, and intermittent function problems.

Specific Functionality Problems

Troubleshooting tips for winch load holding, speed control, and cylinder drift issues.

Transmitter Status and Repairs

Receiver Troubleshooting Steps

The provided manual describes the Stellar Light-Duty Crane, specifically models 3315, 4420, and 5520. It serves as an owner's manual covering safety, operation, maintenance, and troubleshooting.

Function Description:

The Stellar Light-Duty Crane is designed to provide safe and dependable service for a variety of lifting operations. It is a telescopic crane, meaning its boom extends and retracts. The crane is operated via a radio remote control, which can be either non-proportional or fully-proportional, allowing for precise control over crane movements. Key functions include boom up/down, extension in/out, winch up/down, and rotation (clockwise/counterclockwise). The crane is typically mounted on a service truck and requires the vehicle's parking brake to be set and the Power Take-Off (PTO) to be engaged for operation. Stabilizers (outriggers) must be properly positioned on stable, flat ground to ensure stability during lifts.

Important Technical Specifications:

While specific load capacities are not detailed in the provided excerpts, the manual repeatedly emphasizes adherence to load capacity charts and warns against exceeding manufacturer's load ratings. It highlights that ratings are based on hydraulic, mechanical, and structural design, not solely stability. The crane utilizes a hydraulic system, with recommendations for specific hydraulic oils based on temperature (ISO 22, 32, or 46 AW hydraulic oil). The system includes a hydraulic reservoir and filters, with a first filter change recommended after 250 hours and subsequent changes every 1,000 hours. Hydraulic oil should be drained and replaced every 6,500 hours. The manual also specifies torque data for various bolt sizes (Grade 5, 8, and 9) in foot-pounds for both plain and plated bolts, emphasizing the use of Loctite Threadlocker sealant for new bolts.

Usage Features:

Radio Remote Control: The primary method of operation. It features an E-Stop button for immediate crane shutdown, optional speed control/compressor start/stop, engine start/stop, boom up/down, extension in/out, winch up/down, and rotation controls.
Proportional Control: Fully-proportional versions allow for variable speed control based on trigger engagement, enabling smoother and more precise movements.
Simultaneous Functions: The radio remote allows for multiple functions to be operated concurrently (e.g., Extension Out/Winch Down).
Power On Demand (P.O.D.): An optional feature where the crane controller automatically ramps the engine speed to high idle during active operation and returns to low idle during inactivity, optimizing fuel efficiency.
Backup Cord: In case of radio remote malfunction, a backup control cord can be connected directly to the transmitter and receiver for continued operation.
Manual Operation: A manual override system is available for troubleshooting or in case of remote control failure. This involves activating flow control and operating individual solenoid valves. However, a critical warning states that overload and anti-two block protection features are disabled during manual operation, and it should not be used for lifts.
Job-Site Setup: Emphasizes thorough planning, positioning the vehicle on stable ground free from overhead obstructions, and maintaining safe clearances from power lines (in accordance with ANSI B30.5: 5-3.4.5). Stabilizers must be fully extended and make solid contact with the ground, ensuring the truck is as level as possible.
Load Safety: Strict adherence to load capacity charts, knowing the load weight, using approved slings, and maintaining a minimum of 3 full wraps of wire rope on the winch drum are crucial. Warnings against side loads, dragging loads, and operating under suspended loads are provided.

Maintenance Features:

The manual outlines a comprehensive maintenance schedule and procedures:

Daily Inspections: Vehicle checks (tire inflation, fluid levels), parking brake, hydraulic reservoir oil level, hoses and gearboxes for leaks, crane controls for wear/cleanliness, decals for legibility, securing hardware, crane hook/loose parts for damage, wire rope for damage, and safety guards.
Scheduled Maintenance:
- Hydraulic Oil/Filter: First filter change at 250 hours, subsequent changes every 1,000 hours. Hydraulic oil replacement every 6,500 hours.
- Greasing:
  - Rotation gear inner race bearings: Weekly (alternating positions).
  - Rotation gear worm drive bearings: Every 3 months.
  - Rotation gear open gear teeth: Monthly (using heavy Moly Lube grease, Stellar PN 4460).
  - Cylinder pivot points: Monthly.
  - Extension booms: Monthly (using aerosol lubricant, Stellar PN 44512).
  - Winch gear grease level: Monthly.
  - PTO and hydraulic pump shaft splines: Every 6 months (using Stellar PN 20885).
- Other: Tighten all hydraulic lines every 6 months.
Washing: Important to cover the radio remote receiver on the crane mast to prevent water entry.
Wire Rope & Winch: Refer to ANSI B30.5 for wire rope maintenance and the winch manual for winch-specific maintenance.
Extension Boom: Lubricate if noisy during operation, especially due to the metal coating.
Gear-Bearing Bolt Maintenance: Any removed gear-bearing bolt must be replaced with an identical new bolt, secured with Loctite Threadlocker sealant.
General Procedures: Emphasizes performing maintenance only by qualified personnel, positioning the crane safely, lowering the boom, disengaging PTO, shutting off the engine, relieving hydraulic pressure, using Stellar® approved parts, and keeping the crane clean.

Safety Decals of Note:

The manual includes descriptions and locations of various safety decals, highlighting critical hazards:

Electrocution Hazard: Warnings about contact with power lines, lack of insulation, and maintaining safe clearances (PN: 4186, C1179, C4545).
Hoisting Personnel: Strict prohibition against lifting personnel (PN: 12451).
Operation Hazard: Warnings about improper maintenance, unauthorized modifications, overloading, and the need for proper training (PN: 4190, 4189, C4540).
Moving Boom Hazard: Warning to stand clear when stowing or unfolding the boom (PN: C4541).
Two Block Hazard: Warning against the hook block contacting the boom tip (PN: 12300).
Moving Outrigger/Foot Crushing Hazard: Warnings to ensure personnel are clear of stabilizers during operation (PN: C5918, C4795).
Movement Hazard: Warning if valve bank manual overrides are not returned to neutral (PN: 25159).
Overload Hazard: Warning against tampering with the overload device (PN: 28256).
Free Falling Manual Boom Extension(s): Warning about removing retention pins (PN: 12452).
Stow Hook Notice: Not to be used for lifting applications, only for hook stowage (PN: 24712).