The Hyster S1.5-UTS operator manual PDF (OEM ID 4245859, 58 pages) settles how the S1.5-UTS and SS1.5R-UT electric platform trucks, A3B3 and A3B7 series, are charged, inspected and run day to day. Controller fault signals, from motor speed encoder and motor overcurrent to accelerator voltage, main contactor and controller temperature, are listed with their troubleshooting steps, and separate charts work through start failure, brake, steering and lifting faults. Hydraulic and electric principle diagrams show the system layout around the main motor and solenoid valve. On the S1.5-UTS, plan for a 24V/300Ah battery weighing 260 kg and measuring 675×254×540 mm. Your task may be the pre-operation check of brakes, steering, hydraulic oil and storage battery, or the periodic brake clearance check. Bookmarks take you straight to the fault signal tables or the equalizing charge section. Text search finds any fault by name.
What's Inside This Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Configuration Diagram | 5-8 | S1.5-UTS Configuration, SS1.5R-UT Configuration, Main Technical Parameters, Wheel Chassis, Performance Data, Motor |
| Brief Introduction of Structure | 9-14 | Frame, Mast, Fork, Lifting Oil Cylinder, Steering Device, Hydraulic Power Unit |
| Initial Operation | 15 | Emergency Parking Plug, Electromagnetic Brake |
| Use and Operation Instruction | 16-18 | Electric Energy Meter, Electric Door Lock, Accelerator Knob, Emergency Reverse Button, Lifting Button, Lowering Button |
| Use, Maintenance and Charge of the Storage Batteries | 19-22 | Fixed Charger, Built-In Charger, Sulfuric Acid Electrolytic Solution, Initial Charge, Equalizing Charge, Suction Type Densimeter |
| Inspection Before Operation | 23 | Hydraulic Oil, Lifting Oil Cylinder, Instrument |
| Periodic Maintenance and Repair | 24-28 | Brake Clearance, Contactor, Motor, Hydraulic System, Fork Wheel, Gear Box |
| The Store, Transportation and Loading of Truck | 29 | Storage, Transportation, Loading and Unloading |
| Common Faults and Trouble Shooting | 30-32 | Stacker Start Failure, Contactor Failure, Brake System, Steering System, Lifting System |
| Common Fault Signal and Troubleshooting | 33-39 | Motor Speed Encoder, Motor Overcurrent, Accelerator Voltage, Main Contactor, Brake Fault, Controller Temperature |
| Lists of Accessories, Spare Parts and Vulnerable Parts | 40 | Electric Lock Key, Fuse, Sealing Rings |
| Structure Diagram (Explosion Diagram) and Principle Diagram of the Major Parts | 41-43 | Hydraulic System, Electric System, Explosion Diagram, Main Motor, Solenoid Valve |
| Packing List | 44-45 | Electric Platform Stacker, Accessory Box, Operation Manual, Qualification Certificate, Charging Plug, Fuse |
| Appendix 1 | 46-58 | Driver Qualification, Battery Charging, Elevator Operation, Stability, Traffic Rules |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery voltage/rated capacity | 24V/300Ah | p. 6 |
| Battery voltage/rated capacity | 24V/300Ah | p. 6 |
| Battery weight | 260kg | p. 6 |
| Wheel dimension, front | φ250×70mm | p. 6 |
| Wheel dimension, rear | φ80×84mm | p. 6 |
| Brake clearance | 0.2mm to 0.8mm | p. 23 |
| Driving motor power | 1.2kW | p. 6 |
| Driving motor power | 1.2kW | p. 6 |
| Lifting motor power | 3kW | p. 6 |
| Charger output voltage | 24V | p. 22 |
| Charger output current | 30A | p. 19 |
| Rated load | 1500kg | p. 6 |
Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7 Common Problems This Manual Covers
Hyster S1.5-UTS stacker will not start and the contactor does not work when the key is switched on
Check the control circuit fuse and the main circuit fuse, and replace any that are burnt out, following the start failure chart on page 30. Tighten storage battery connections that are loose or have fallen off, and keep tools and metal off the open battery (page 47). Inspect the power switch and electric lock switch for poor connection or damage, then repair or replace them.
Manual Section: Common Faults and Trouble Shooting p. 30Forks will not lift at all when the lifting button is pressed
Reduce the load first, since overload is the first cause listed on page 31. Check the hydraulic oil and add filtered hydraulic oil if it is low (system charge is 12L per page 25). Charge the battery if voltage is low, and confirm the electric lock is unlocked. If overflow valve pressure is suspected, do not adjust it yourself. Page 32 says users shall not adjust safety valve pressure; have professional personnel do it.
Manual Section: Common Faults and Trouble Shooting p. 31Electromagnetic brake does not work or holds weakly while the stacker is traveling
Stop operating at once, as page 19 requires, and display an OUT OF ORDER sign on the truck (page 11). Check the fine motion switch erection bolt and the side-magnet brake connecting wire, then tighten or replace them following page 30. Measure the brake plate to magnetic steel clearance with an insert ruler. If it is over 0.5mm, adjust it to 0.2 to 0.3mm per page 27. Replace worn braking plates.
Manual Section: Common Faults and Trouble Shooting p. 30Storage battery end voltage stays low even after a full charge cycle
Check the electrolyte level in each cell and add electrolytic solution if it is low, but never use industrial sulfuric acid or running water (page 20). Replace electrolyte that contains foreign matter, per page 31. Inspect the terminals for corrosion, which is a listed cause of the Battery Under voltage code 4,2 on page 34. Repair or replace any damaged individual battery. Charge at 24V and 30A (page 22) in a ventilated area with no flame (page 19).
Manual Section: Common Faults and Trouble Shooting p. 31Truck shakes while traveling even on a hard, flat indoor floor surface
Check the driving wheel locating nuts and screw down any that are loose or have come off, following the chart on page 31. Verify that the balance wheel, the driving wheel and both front wheels sit in the same plane. Adjust the balance wheel bolts until all four wheels line up. Measure wheel diameters and replace any wheel worn down by 5% (page 20).
Manual Section: Common Faults and Trouble Shooting p. 31Fork keeps rising after the lifting button is released and will not stop
Turn off the general power supply switch immediately to cut power, as page 19 directs. Drive the stacker to a safe position, lower the fork manually, and have the lifting circuit repaired before further use. Keep every part of your body out from under the forks and load (page 9). Do not put a faulty truck back into service (page 16).
Manual Section: Abnormal situation handling during operation p. 19Frequently Asked Questions
What are the replacement specifications for the 24V traction battery on the Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7?
The stacker uses a 24V/300Ah storage battery with dimensions of 675x254x540mm and a weight of 260kg. During initial charging, the electrolyte density should be 1.260±0.005 at 25°C, and the liquid surface should be 15-25mm higher than the protective board. p. 6
What is the procedure for adjusting the brake clearance on the Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7?
First, use an insert ruler to check the clearance between the brake plate and magnetic steel; if it exceeds 0.5mm, it must be adjusted. Loosen the fitting screw, adjust the adjustment screws, and ensure the final clearance is kept between 0.2mm and 0.8mm. p. 27
What is the required hydraulic oil pressure for the Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7 1500kg rated load truck?
The stipulated system pressure for a truck with a rated load of 1500kg is 16Mpa. If the pressure is not in accordance with this value, a professional must adjust the overflow valve using a pressure meter with a capacity over 20Mpa. p. 32
What is the maintenance interval for replacing the fork wheel bearings on the Hyster S1.5-UTS, SS1.5R-UT, A3B3, A3B7?
The bearings of the fork wheel should be replaced every 1200 hours of operation. This is part of the scheduled maintenance for consumables and partial parts. p. 28
What is the required oil charge for the hydraulic system?
When performing a daily inspection of the hydraulic oil level, the fork should be lowered to the lowest position, and the oil charge is 12L. p. 25
How quickly can I access this Hyster S1.5-UTS manual after buying?
All 58 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Can I print just the pages I need from this Hyster S1.5-UTS manual?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
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