Sealey VS550 Instructions Download Page 2

5.  OPERATION

 

‰

   WARNING! DO NOT

 use on the high pressure fuel circuit found on common rail systems. 

5.1. 

  

TO MEASURE FUEL PRESSURE BEFORE THE FUEL FILTER (fig.2, fig.1)

NOTE:  

Ensure that the ignition is OFF before commencing.

5.1.1. 

  

Assemble the items as shown in fig.2 and connect to fuel inlet side of filter.

5.1.2.   

Switch on ignition for lift pump to pressurise the system.

5.1.3. 

  

Start the engine and check the arrangement for leaks. If any leaks are evident, switch off engine immediately. Dry any spillages and  

 

re-assemble ensuring no leakages.

5.1.4. 

  

Run the engine until the pressure gauge is reading a steady pressure. Check the pipes for flowing, clean and bubble free fuel.

5.1.5.   

Rev the engine to ensure that pressure is maintained through the rev range.

5.1.6. 

  

Switch off the engine and 

DO NOT

 disconnect the arrangement until the fuel pressure has dropped. 

5.2. 

  

TO MEASURE FUEL PRESSURE AFTER THE FUEL FILTER (fig.3, fig.1)

NOTE:  

Ensure that the ignition is OFF before commencing.

5.2.1. 

  

Assemble the items as shown in fig.3 and connect to fuel outlet side of filter

5.2.2.   

Switch on ignition for lift pump to pressurise the system.

5.2.3. 

  

Start the engine and check the arrangement for leaks. If any leaks are evident, switch off engine immediately. Dry any spillages and  

 

re-assemble ensuring no leakages.

5.2.4. 

  

Run the engine until the pressure gauge is reading a steady pressure. Check the pipes for flowing, clean and bubble free fuel.

5.2.5.   

Rev the engine to ensure that pressure is maintained through the rev range.

5.2.6. 

  

Switch off the engine and 

DO NOT

 disconnect the arrangement until the fuel pressure has dropped. 

NOTE: 

When testing for positive/negative pressure, set up equipment as per Fig.3 and replace the gauge (item 2) with gauge (item 1).

5.3.    

Always keep the components clean and free of oil and grease. Clean them regularly with a non-aggressive cleaner, ensuring they are  

 

dry before storage.

 

‰

   WARNING! DO NOT

 disconnect the unit from the fuel line until the pressure gauge reads zero

5.4.    

In order to preserve integrity, 

DO NOT

 expose the components to sunlight or heat source over an extended period of time.

5.5.    

Store in a clean dry environment.

Original Language Version

© Jack Sealey Limited

Fig.2

Fig.3

VS550        Issue 1      30/04/21

Sealey Group, Kempson Way, Suffolk Business Park, Bury St Edmunds, Suffolk. IP32 7AR

 01284 757500 

 01284 703534 

 [email protected] 

 www.sealey.co.uk

ENVIRONMENT PROTECTION

Recycle unwanted materials instead of disposing of them as waste. All tools, accessories and packaging should be sorted, taken to 
a recycling centre and disposed of in a manner which is compatible with the environment. When the product becomes completely 
unserviceable and requires disposal, drain any fluids (if applicable) into approved containers and dispose of the product and fluids 
according to local regulations.

Note

: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior 

notice.

Important

: No Liability is accepted for incorrect use of this product.

Warranty

: Guarantee is 12 months from purchase date, proof of which is required for any claim.

Parts support is available for this product. Please email [email protected] or telephone 01284 757500

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