GE Becker HPP-5, Installation And Maintenance Manual

Becker HPP-5 High Pressure Positioner Maintenance and Operation Manual  |  12

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HPP-5 Assembly Procedure

Assembly

NOTE: During assembly, moisten O-rings, threads, thrust bearings, 

and the spring seat recess with a lightweight silicone grease�

Step 1� Using a 7/16-inch deep well socket, insert bottom seat 

(rubber facing upward) (E) into the pilot body block (F)�

1a�   Install strainer for balanced valves (D1) in the outside of  

spacer (D) and insert assembly on top of bottom seat (E)�

1b�   Insert the balanced valve assembly (C) with the stem facing 

downward�

1c�   Insert the second balanced valve assembly (C) with the stem 

facing upward�

1d�   Insert the second strainer (D1) and spacer (D) assembly�

1e�   Insert the top seat (rubber facing downward) (E)�

1f�   Secure the seat assembly to the pilot body block (F) with 

two washers (C1), seat cover (B), and two flat head machine 

screws (A)�

NOTE: Install washers to compensate for tolerance variations�(For 

steps 2-2a, refer to Figure 2)�

Step 2. Slide two -010 O-rings (G) onto valve adjusting  

screw (H) and into the grooves at the top of the screw�  

Do not lubricate the upper O-ring�

2a�   Turn valve adjusting screw (H) into the inside piston (I) until 

the screw head is flush with the piston recess�