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After the forklift has been running for 500 hours, routine maintenance is required. The efficiency, life and safety of 
the forklift depends on the routine maintenance. 
For  forklift  maintenance,  replacement  spare  parts  should  be  provided  by  our  company  to  ensure  quality.  It  is 
recommended to contact Kelvin Engineering Ltd or the company's after-sales service department. So that your 
forklift can operate more safely and economically. 

 

1. Maintenance Safety Rule 

Maintenance work can only be conducted by an authorized, fully qualified engineer. 
(1) Keep the maintenance site clean and hygienic. 
(2) During maintenance, do not carry loose objects or valuables on your body. 
 

Note! 

When repairing the electrical system of a forklift, if metal contacts the energized electronic components, it may 
cause a short circuit or burn. So, please take off your watch, earrings, or other accessories. 
(3) Before the forklift is repaired, unplug the power socket, and disconnect the power supply. 
(4) Before opening the left and right box covers or the electrical system, turn off the key switch of the forklift. 
(5) Before checking the hydraulic system, the fork should be lowered to release the system pressure. 
(6) When checking the oil leakage of the forklift body, please wipe it with paper or cardboard, and do not touch it 
directly with your hands. To avoid burns. 
(7) Please note that the oil temperature in the transmission or hydraulic system may be high. The forklift should be 
cooled first, and then the gear oil or hydraulic oil should be replaced to prevent high oil temperature from causing 
combustion. 
(8) The hydraulic system should be filled with new clean hydraulic oil that meets the requirements. 
 

Note! 

If the hydraulic oil is not clean, it will affect the precision hydraulic components and reduce the capacity of the entire 
hydraulic system or even collapse. 
If varied brands of hydraulic oil are used, it will damage the hydraulic components and affect the system capability. 
Therefore, when adding or replacing hydraulic oil, pay attention to the use of uniform grades. 
(9) Please abide by relevant laws and regulations, protect the environment, store and discharge oil in accordance 
with regulations, and do not discharge it into the sewer pipe. 
(10) When welding the forklift body, disconnect the battery power supply. Because the welding current may enter 
the battery during welding, to avoid this kind of situation, please cut off the battery. 
(11) When working under the forklift, the forklift should be supported by the bracket. 
 

Warning! 

Improper support may cause the forklift to tip over and injure people. If the forklift does not have lifting equipment 
or support protection, it is forbidden to work under the forklift. 

Chapter 10 Maintenance

Summary of Contents for Mini Series

Page 1: ...neering co uk W www kelvinengineering co uk A UK Headquarters Waterend Farm Epping Road Ongar Essex CM5 0DE Company Reg Number 08189288 Vat Reg 260080637 KELVIN Mini series electric counterbalance for...

Page 2: ...ictly abide by accident prevention regulations technical safety regulations and maintenance and repair guidelines The operator of the machine must ensure that they carefully read and fully understand...

Page 3: ...3 Chapter 8 Battery And Charger 15 1 Replace battery 15 2 Charge 15 3 Battery maintenance 16 4 Motor Maintenance 17 5 Electromagnetic brake maintenance 17 Chapter 9 Fault Analysis 18 Chapter 10 Mainte...

Page 4: ...tion of the controls or pedals 3 Workplace It can only run on a flat and hard ground such as concrete or asphalt ground Do not work in oily areas to avoid slipping Make sure that the ground can bear t...

Page 5: ...eful For larger cargo loads forklifts should be equipped with backrest Do not drive or tilt the mast when lifting goods 6 Parking precautions After the forklift stops the forks should be at the lowest...

Page 6: ...arning Nameplate and Symbols The Battery forklift has the following symbols Please read the related content on the labels 1 Lifting and lowering control 2 Safety marks nameplate 3 Load chart label 4 L...

Page 7: ...n such as slippery areas Using as tow tractor for other vehicles Using to transport or lift people Working on grass or sand Hanging the wire rope directly on the forks to hang the goods Using the fork...

Page 8: ...t truck is suitable for 5 to 40 in the working environment If the forklift needs to be used for a long time in the environment of great changes in temperature or humidity special equipment must be ins...

Page 9: ...6 3 3 Hydraulic schematic diagram Spare parts name above 1 Pump station or gear pump 2 Multi way valve 3 Block valve 4 Lift cylinder 5 Tilting cylinder...

Page 10: ...7 3 4 Electrical schematic diagram...

Page 11: ...8 4 Capacity chart 5 Safety signs Do NOT Stand on or off Caution nipping hand Lifting position No access to the back of the mast...

Page 12: ...ht switch 4 driver seat 5 Pedal horn switch 6 Counterweight 7 Driving boxes 8 Folder 9 USB Power Interface 10 Emergency Stop Switch 11 Driving direction switch 12 Lifting handle 13 Brake pedal 14 Tilt...

Page 13: ...e mast tilts forward and backward respectively The speed is controlled by the tilt angle of the handle the greater the angle the faster the speed Note Do not suddenly stop when lowering the forks and...

Page 14: ...ng wheel also reverses 3 2 When the forklift encounters an obstacle it should not be forced to pass and should pass by the obstacle Warning Do not allow wheels to slip If the operator s hands or shoes...

Page 15: ...Attachment Forklifts can be equipped with different accessories to further enhance safety 1 Load backrest When the height of the goods is too high you can add a load backrest to increase the stability...

Page 16: ...ce the braking time Do not force a steep slope 1 10 Before the forklift enters the elevator it shall be ensured that the elevator can withstand the entire load the weight of the forklift the weight of...

Page 17: ...to the desired position 3 3 Slowly move the forklift forward so that the goods are accurately positioned on the shelf 3 4 Lower the fork to remove the cargo 3 5 Slowly retreat the forklift 3 6 Lower t...

Page 18: ...ut into battery box 2 Connect joint between battery connector lug and cable 3 Close battery box 4 Keep key switch off 5 Plug the socket 2 Charge 2 1 No smoking or using fire Please do not charge too m...

Page 19: ...cover After full charge the comparison table between battery temperature and electrolyte proportion is as following Temperature Proportion g cm3 15 1 31 0 1 30 15 1 29 S 30 1 28 45 1 27 Please add dis...

Page 20: ...d do hot dry processing 3 Check whether motor outgoing connecting wire is correct and firm 4 Check whether commutator segment is clean whether electric brush can slide freely in the brush box 5 Check...

Page 21: ...n circuit 2 BB detection line open circuit 2 3 HPD HPD sequence fault 1 KSI Brake and accelerator input sequence is not correct 2 Wrong HPD type choice 3 Wrong accelerator potentiometer adjustment cho...

Page 22: ...rea the current decreases 1 Temperature 85 or 25 2 Vehicle is overloading 3 Wrong controller installation 4 Working in extreme environment For example LED display code 2 4 means LED light flash 2 time...

Page 23: ...or cardboard and do not touch it directly with your hands To avoid burns 7 Please note that the oil temperature in the transmission or hydraulic system may be high The forklift should be cooled first...

Page 24: ...nction is normal 5 Hydraulic device Check whether its function is normal 6 Meter Check whether its function is normal 7 Hydraulic system Oil level and leak oil or not 8 Drive device Noise and leak oil...

Page 25: ...ow clean motor dust Note Electrical components should not be flushed with high pressure flushing devices Do not destroy the electrical components on the circuit board To maintain the position of elect...

Page 26: ...tion inspection 6 2 Fix the cable connector tightly 6 3 Check the contactor contacts 7 Battery 7 1 Check the electrolyte level the level should be 10 15mm above the plate 7 2 Check whether the connect...

Page 27: ...axis L A 2 Hydraulic system H O B 3 Drive gear box H O C 4 Lifting chain L D 5 Bearing of lifting system L G L Lubricate H Check O Change Oil 6 Lube and grease Grease type Specification Suitable parts...

Page 28: ...will move with the terrain after it is parked At this time the wedges must be used to cushion the wheels to prevent movement 3 Storage of forklift If the forklift needs to be stored for a long time pl...

Page 29: ...26 Chapter 12 Product warranty and after sales service For product warranty and after sales service please refer to our after sales service description...

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