Henkel 97725 User Manual

10 

 

   

 

    Type of malfunction 

Possible causes 

Correction 

   

Drops form on the trigger 

–  The needle gasket 5 is 

worn respectively loose 
and must slightly be 
retightened. 

• For that purpose 

remove needle/valve 
cartridge, see 
section 4.3. Then 
unscrew screw at the 
valve body 4 and take 
out needle driver 
(squared bolt). Using a 
small screw driver turn 
stuffing box 6 gently 
clockwise and try if 
needle is sliding 
smoothly again within 
the tightened gasket. 

   

Drops form on the nozzle 

–  Either needle or nozzle 

is worn. 

–  Needle is not closed 

properly e.g. because 
of particle residues 
within nozzle. 

• Replace needle or 

nozzle. 

•  Clean the needle/valve 

cartridge with solvent, 
see section 5. 

   

There is an uneven and 
not steady spray jet 

–  Dirt residue within air 

cap. 

–  Nozzle is not correctly 

screwed in. 

•  Clean air cap with 

solvent. 

•  Make sure that nozzle 

is screwed in tight. 

   

Air blowing constantly 
although trigger is 
released. 

– O-ring 9 and/or 

washer 10 worn. 

–  Needle nuts are not 

counter-screwed in 
correct position, see 
section 5.3. 

• Change O-ring and/or 

washer. 

   

Drops form on the 
extension at the applicator 
and/or the spray head. 

– O-rings are worn. 

• Change O-rings, see 

section 7.2.