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1.5. Poddomkrachivaniye / posting of the car and transportation in case of accident

Poddomkrachivaniye by means of a regular jack when changing wheels

The regular jack is intended only for short-term raising of the car when replacing a wheel, before performance of any works under the car it is necessary to establish it on special props!


 PERFORMANCE ORDER

  1. Park the car on the flat horizontal platform, whenever possible with a hard coating.
  2. Reliably cock the parking brake.
  3. Transfer the AT selector lever to situation "P".
  4. In case of need expose a sign of an emergency stop.
  1. Prop up antiretractable boots the wheel located on diagonal from a subject to replacement.

At implementation of the procedure on a bias it is necessary to enclose boots under both wheels of a serviceable axis from descent.

  1. Prepare the necessary tool (a jack, a balloon key) and a spare wheel.
  2. At the corresponding complete set take off a protective cap of a disk, then weaken bolts of fastening of the failed wheel.
  1. Prepare a regular hydraulic jack for work: collect the three-section handle and connect it to the drive of a hydraulic pump of domkratny assembly. Check reliability of tightening of a cap of a spuskny opening (2), - in case of need tighten a cap by means of a tetrahedral key (1) on the end of the handle.

The full reversing of a carving cap is accompanied by risk of loss of hydraulic liquid!

  1. Get a jack head under the respective platform of a case of the forward or back bridge, - track that the jack settled down strictly vertically, and his heel rested all the surface against soil, - at friable soil enclose under a heel a suitable lining (in winter season it is useful to have a piece of a wide board in the car).

Remember that regardless of existence of a bias the jack always has to hold strictly vertical position!

  1. Working with the hydraulic pump drive handle, raise the car a jack, - the damaged wheel has to come off the earth completely.
  2. Turn out wheel bolts and make replacement of a wheel.
  3. Check pressure of a rating of the installed spare wheel, in case of need make the corresponding adjustment (see Specifications).

The maximum admissible duration of continuous operation of the electric compressor for a rating of tires makes 8 minutes.

  1. Weaken a carving cap of a spuskny opening of a jack and completely drown the piston of the last in the cylinder.
  2. Put the removed wheel and the tool on the regular places.
  1. In conclusion evenly tighten wheel bolts in a diagonal order with the required effort (130 Nanometers).

For fastening of wheels only company bolts with designation of the Mercedes-Benz logo have to be used!

Posting of the car

In modern practice the next four safe ways of posting of SUVs are used:

Posting on the 2-rack-mount elevator with application of special transitional nozzles

The old transitional nozzles intended for posting of the W460 models for the W463 models are no good!

Nozzles can be also used complete with props for fixing of the lifted car.

The set of transitional nozzles consists of 4 support (1) and 4 Basic Elements (2).

Design of transitional nozzles for posting of SUVs on the 2-rack-mount elevator

1 — the Support

2 — Basic Element

Nozzles are fixed on paws of the 2-rack-mount elevator which then are got under the ends of side beams of a body of the car.

The scheme of an institution of the paws of the 2-rack-mount elevator equipped with transitional nozzles under the ends of a side beam of a body (1 of 2)

The scheme of an institution of the paws of the 2-rack-mount elevator equipped with transitional nozzles under the ends of a side beam of a body (2 of 2)

1 — the Support of a transitional nozzle

Posting on the 2-rack-mount elevator with application of wheel captures

One more way of posting of SUVs on the 5-ton 2-rack-mount elevator is use of special wheel captures.

Captures are intended for fixing on rims with outer diameter no more than 900 mm!

Posting on props with use of the lifting equipment

Prop design for fixing of the SUV in the lifted situation

The scheme of posting of the car by means of props (for example, for replacement of bridges)

And — Rise

In — Fixing

Separate posting of a body and frame

During the works at the leveling stand the scheme of separate posting of a body and frame of the car can be used.

Installation on the leveling stand of the car with the removed bridges is accompanied by risk of loss of balance. In such cases the body is dismantled from a frame and both elements are hung out separately.

The body is hung out in the standard way with use of the 2-rack-mount elevator and transitional nozzles (see above).

When posting a frame (both with removed, and with the established bridges) paws of the elevator are brought to regions of basic arms of longitudinal levers of a suspension bracket, - in order to avoid risk of loss of balance the frame has to be fixed reliably on paws.

Transportation of the emergency car

Transportation on a tow truck platform

It is the most reasonable to transport the emergency car on the tow truck.

For loading of the emergency vehicle on a platform of the tow truck regular towing eyes can be used (see below), - do not forget to switch to neutral provisions ("N") of AT and the transfer case.

In order to avoid damage of a running gear fixing of the car on a platform has to be made only for disks of wheels and not for suspension bracket elements at all!

Towage of the emergency vehicle

At towage with the lifted forward bridge, and also at control of the parking brake at the roller test bench the engine has to be switched off, - otherwise owing to the active braking action of electronic antistrange (ESP) there can be a damage of the brake system of the back bridge!

If it is not possible to avoid towage, it is the most reasonable to make it on a rigid hitch (the ignition key of the emergency car has to be turned in situation 2).

It is necessary to remember that at a detachment or in case of a full discharge of the rechargeable battery shutdown of blocking of a wheel is not possible, as well as removal of the lever of the AT selector from situation "P"! The order of emergency shutdown of blocking of the selector is described in the Section Start of motion and switching of automatic transmission.

The towing element (cable/bar) has to cling only to a special towing eye, - at all not to a bumper or elements of a suspension bracket.

At towage on a flexible hitch use the towing cable which is only specially intended for this purpose. Use of modern synthetic materials allowed to market towing cables of the elastic design minimizing danger of breaks as a result of hit of a sling under wheels of the towed car.

The forward towing eye is located under a bumper, back at the left – also under a bumper, at the left in the direction of travel.

Location of a forward towing eye (1)

Location of a back towing eye (2)

At refusal of AT or failure of electric equipment towage of the emergency car has to is made with the selector lever transferred to situation "N".

At damage of the transfer case before towage it is necessary to make dismantle of driveshafts.

Towage of the car with the damaged forward bridge has to be made with a separation of wheels of the last from the earth and with the shaft disconnected back cardan.

Самоконтрящиеся nuts of fastening of driveshafts are subject to replacement without fail!

At damage of the back bridge towage is made also with a separation of wheels from the earth with the forward wheels got on the special cart.

The driver of the towing car has to try to move as much as possible evenly, smoothly releasing coupling at gear shifting and, especially, at start-off from the place.

Do not forget to turn a key in the lock of ignition of the towed car in situation 2, otherwise inevitably there will be a blocking of a steering column. Besides, at the included ignition also indexes of turns and stoplights are activated.

Activation of indexes of turns at the switched-on alarm system leads to temporary shutdown of the last.

At control of the towed vehicle you watch that during the movement the cable constantly remained tense, - manipulating a foot brake, try not to allow sharp breakthroughs and arrivals on a proslablenny cable.

Remember that at the switched-off engine efficiency of braking of the car considerably decreases because the vacuum amplifier of brakes ceases to function, at the same time it is necessary to squeeze out a pedal of a foot brake with much big, than usually by effort. When performing maneuvering the bigger effort should be put also to a steering wheel, - the steering pump will also not function.

Before a start of motion drivers of both vehicles (towing and towed) should coordinate among themselves a route.

The movement has to be carried out only with moderate speeds, along the shortest route and observance of traffic regulations. Avoid sharp braking, accelerations and maneuvering. Remember that at towage of the car on the region of the dirt road there is always a danger of demolition on a roadside.

Features of towage of the emergency cars equipped with AT

At a detachment or in case of a full discharge of the rechargeable battery removal of the lever of the AT selector from situation "P" a usual soposob is not possible! The order of emergency shutdown of blocking of the selector is described in the Section Start of motion and switching of automatic transmission.

The cars equipped with AT can be towed by the forward course on all four wheels with a speed which is not exceeding 50 km/h and on distance no more than 50 km.

Non-compliance with requirements to restriction of the maximum speed of the movement and extreme range of towage can lead to damage of the transmission.

Before towage check the level of transmission liquid (see the Head Onboard electric equipment), - at the insufficient ATF level, it is necessary to make necessary adjustment, or to tow the car only with the driving wheels which are torn off from the earth.

Towage of the equipped car AT on long distances, and also with the failed transmission has to be made only with a separation of driving wheels from the earth, or with the disconnected driveshafts, - ideally - on a tow truck platform!

Make the following preparatory procedures:

Towage for the purpose of start of the engine

Start of the engine of the equipped AT of cars by method of towage or pushing is not possible, - in case of need use the auxiliary power supply.