Curtis OL 812 Manuale Utente

 
 
 

CAP-215 

18 

 
4.5. 

 
 

The intake valve of the 1st stage is integrated into the top part of the piston.  The pressure valve is fitted 

 

between valve head and cylinder. 

 
 

Changing the pressure valve

 
 

Change pressure valve of 1st stage according to 

 chapter 

4.6. 

 
 

Changing the Intake valve

 
 

-  Loosen two cap nuts from tube connectors 

 

   and remove inter-cooler and after-cooler. 

 
 

-  Remove counter-sunk screw (1) together with 

 

   fixation nut (2) from piston head. 

 
 

-  Remove plate valve (3). 

 
 
 
 
 

                                                                                                       Fig. 14:  valve head 1st stage 

 
4.6. CHANGING 

 
Intake and pressure valves of the 2nd stage are 
combined in one plate valve under the valve 
head. 
 
 
 

-  Loosen two cap nuts from tube connectors 

 

   and remove inter-cooler and after-cooler. 

 
 

-  Remove four allen screws (5), together with 

 

   washer (6) from valve head (1). Remove valve 

 

   head. 

 
 

-  Remove gasket (2) and plate valve (3). 

 
 

-  When reinstalling valve check for right position. 

 

   Countersunk screw heads have to be at the top. 

 
 
 
 
 
 
 

 

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                                 Fig. 15:  valve head 2nd stage