BMW 7 Series: Gun For Cavity Sealing

Fig. 17: Identifying Vessel Gun, Angle Nozzle And Round Spray Nozzle

1.0 Scope of delivery

• Owner's Handbook
• Pressure vessel gun (1) for cavity sealing
• Spray set, consisting of spray hoses: angle nozzle (2) and round spray nozzle (3)

IMPORTANT: Before start-up, read Owner's Handbook and safety instructions.

2.0 Start-up

• Open pressure vessel and introduce cavity sealant in form of a 1-litre can.

  Close pressure vessel.

• Connect spray hose to quick-connect coupling.
• Connect apparatus to compressed air supply.

  Working pressure 2-6 bar, max. 8 bar!

3.0 Mode of operation

NOTE: Unlike previous apparatus, it is possible here to alter the spray pattern with the air flow control screw (large knurled screw)!

• Twisting the air flow control screw in decreases the air flow and thus reduces the material spray mist.

  This facilitates optimum working when preserving open components/surfaces.

• Twisting the air flow control screw out increases the air flow and thus the material spray mist (for closed cavities).
• The trigger lever has two stages.

  Stage 1 - discharge of air only.

  Stage 2 - discharge of air and material.

• After finishing work, press the first stage to clean the spray hose with compressed air.
• When storing, remember to twist the air flow control screw closed to prevent the material from drying out.
• Clean the gun prior to extended periods of non-use (approx. 2 weeks and upwards).
• To ensure that the spray hoses function properly, do not store the hoses coiled up e.g. in the frame side member area! Store spray hoses stretched out.

4.0 Application examples

• Use the matching spray hoses for the different cavities or surfaces.
• Example - doors and lids: Spray hose with angle nozzle. Reduce air flow to keep spray mist to a minimum.
• Example - frame side member: Long spray hose with round spray nozzle. Depending on the type, increase the air flow slightly.
• Always keep the spray mist to a minimum so as to avoid fouling and bad smells.

5.0 Safety instructions

• Do not inhale spray mist.
• Use only in well ventilated rooms.
• Working pressure max. 8 bar.

Handling Airbags And Restraint Systems

1.0 Airbags and restraint systems

• In the case of vehicles with airbags and restraint systems observe the relevant safety instructions.
• When straightening work is carried out on the body there is a risk of airbags being accidentally activated when the battery is connected.

  Because of this risk the battery negative lead must be disconnected prior to all repair work on the body.

HANDLING ELECTRICAL AND ELECTRONIC EQUIPMENT

1.0 Battery

• Explosion hazard in the vicinity of the battery during welding and grinding work. The battery must be removed.

2.0 Control units

• The following risks exist when the battery is connected:
  • Damage to control units resulting from welding work on the body or a line short circuit.
  • Accidental activation of airbags during straightening work on the body.

Because of these risks the battery negative lead must be disconnected prior to all repair work.

• Control units are designed for a temperature of 65ºC. The temperatures in a spray booth do not pose any problems. If a vehicle is in the spray booth at a displayed temperature of 80ºC, the actual temperature of the vehicle is = 60ºC (object temperature).
• Protect control units against effects of heat >65ºC (e.g. during welding and drying work with an infrared radiator or hot air blower).

3.0 Electrical wires and wiring harnesses

• Protect electrical wires and wiring harnesses against damage (e.g. during straightening and grinding work).
• Protect electrical wires and wiring harnesses against effects of heat >65ºC (e.g. during welding and drying work with an infrared radiator or hot air blower).
• Do not kink electrical wires.

4.0 Optical fibres

Follow instructions for handling optical fibres, see ELECTRICAL SYSTEM.

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