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Home > News > Industry News > The precautions of winter main.....

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The precautions of winter maintenance for fire truck

  • Author:Changjie
  • Release on :2016-08-19


Winter is a fire-prone season and police work frequency is relatively high. Meanwhile,it's also a season in which there are more starting failures for fire truck. In order to ensure correct alarm quickly dispatched, pilots and equipment technicians should strengthen the self-maintenance for fire trucks in winter. The key is engine maintenance, tire maintenance, liquid battery checking and maintenance, cooling system seasonal exchange maintenance and air-conditining system maintenance and so on five sectors.
1. Winter engine maintenance
    (1) Before starting the engine, especially after a night of standing lubricating oil each friction surface disappeared and lost film protection; low temperature lead viscosity of the lubricant to greatly increased and adhesion and fluidity becomes bad. In this case, the resistance movement of starting the engine greatly increased and more than 60% of the power is used to overcome the resistance movement when starting.
   (2) In winter,temperatures is low and the degree of lubricant viscosity increases to cause bad flowing. It should be allowed engine to keep rolling between 1400 rev / min to 1800 rev / min after starting the engine. Let the car warm-up before starting. During warm-up, you can not shove the accelerator pedal. Do not let the engine speed too high. Hot car for 1-3 minutes to small throttle motor car.
    (3) Starting in winter must be very soft and slow.To do like this is to allow the engine to reach normal operating temperature when no load as small as possible.
  (4) Master special driving skills. Since the maximum torque output of diesel cars generally about 2000rpm, even joined the turbocharged assist, to make up for the shortage of high-speed horsepower, but across the peak torque region, torque output will rapidly decline. So that the driver should be noted that models itself maximum torque output speed values, and try to control the speed while driving, lifting to high gear, and reduces the speed of raising or lowering. In addition, as diesel cars are generally equipped with a turbocharger, so they will use the extra attention: the morning after only a few minutes walk to start hot car, after only a few minutes by idling flameout.
   (5) The air filter can be missing installed and installed backward when you install or wrongly install each gasket and rubber connecting pipe, and to ensure that all press fitted at rigor. Air filter paper dust cup used after every 50-100 hours to clear dust once, use a soft brush to brush off surface dirt, working time over 500 hours or damaged, it should be replaced, use oil bath air filter every 100-200 hours of work, clean the filter with clean diesel fuel, lubricating oil and replace them, if the filter has been broken, to be replaced immediately, and pay attention in use, according to regulations add oil.
2. Winter tire maintenance
  (1) Winter maintenance on the premise is the tire routine examination. The pneumatic tire life is an important indicator of life beyond the normal air pressure of the tires will be shortened by 20% to 10%, if 30% lower than normal air pressure, tire life will be shortened 52%. Recommended weekly during cold tire inspection table four tire pressure tire pressure, in order to protect front and rear tires on each side are in full contact with the surface ground to achieve the best grip effect, while the right tire pressure can reduce road vibrations, increasing driving comfort sense, and saving energy.
   (2) Pay attention to tire sidewall maintenance , in particular, check the internal sidewall. It recommends that in the case of complex and high-speed roads before and after each finish, will lift the vehicle to check the tires on both sides of whether injured. If you can not lift the steering wheel to stop in good visibility when the weather hit the head, you can directly see the situation on both sides of the steering tire.
  (3) Do not upshift directly to the high speed after starting. Firstly slowly drive for 1 to 3 km, and can reasonably warm tires to avoid cold tire slipping at high speed;
   (4) Do not freely use different patterns and different specifications tires in order to avoid different friction on road which can cause skidding and loss of control. In addition, when using a single-oriented tires, should not be anti-loaded pattern, otherwise it will lose its grip.
   (5) If you find tires bulge, cuts, nail bar, valve rubber aging and abnormal wear and tear, to immediately consult a professional tire shop recommended tire to travel 10,000 km to conduct a tire rotation.
   (6) Regularly inspect and cull tread groove Sting, stones and other hard impurities, so as not to continue to use the carcass damage. Tire storage and handling should be avoided and other oil and chemical exposure, to prevent accelerated aging of rubber tires.
3. The inspection and maintenance of liquid battery
   (1) To check whether there is leak phenomenon of battery electrolyte . If there are leaks, the battery should be replaced; if there is no leakage, the surface should be washed with hot water battery and battery terminal post oxides, but be careful not to let the water from the vent into the internal battery. After the water to be dry, it is best polished with sandpaper and clean the pole and the joint contact surface, tighten the head screws to ensure that when you start to have enough strength of current.
  (2) To check the battery voltage. The method is: when the engine temperature normal circumstances, when you start the machine technology in good condition, successive start
the engine can smoothly start up, the battery in good condition, the voltage is normal. If every time you start the engine speed gradually decreases, or barely able to start the engine, indicating that the battery voltage has been in a state of loss of electricity, should be charged.
  (3) Open the battery watering cover to see whether the water level in the normal position. Above the liquid level of the electrolyte electrode plate edges should be 10-15 cm. Found the water level is below the lower marking, it is necessary to add distilled water, the standard is marking down the middle of the most appropriate, do not add water or electrolyte directly, this will cause the battery destroyed.
4. Seasonal  maintenance of cooling system
   (1) Firstly check the appearance of the scuppers of the pump, the thermostat connector, up and down the pipe joints, drain port, tank cover and water storage tanks and other parts for leaks traces. Immediately if found to have leaks, you should find out the reasons to exclude, do not make do with the opening.
  (2) Note antifreeze liquid level is generally at a distance of about 10 mm fire truck tank with outlet is appropriate, or in accordance with the standard scale of additional antifreeze similar water tank, do not add water or antifreeze will be too full to hot water tank to allow sufficient expansion space.
  (3) Finally, check the thermostat. If the thermostat is not working properly, the engine is at low or high temperature long-term work, increased engine wear will shorten the
life of the engine, so the thermostat must ensure is in good condition. More importantly, the thermostat must not be removed. General models dismantle thermostat after about traveling within 2-30000 km, the engine will be scrapped
5. Air-conditioning system maintenance
  Air-conditioning hot air is placed for a summer time. It is best to try hot air, including fans running any abnormal sound, duct patency. Problems sometimes encountered in warm water for long periods of coolant flow, condensing blocked circulation line.