GE Becker HPP-5, Installation And Maintenance Manual

13  |  GE Oil & Gas

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Step 3� Place O-ring -011 (X1) in the adjusting orifice (W)� Place the  

assembly in the gauge manifold (V) as shown�

3a�   Place O-ring -011(X1) in the nuts (X) and secure the adjusting 

orifice (W) with nuts (X) in the gauge manifold (V) as shown�

3b�   Seat the four –012 O-rings (L) and roll pins (M) into  

the inlet and exhaust port recesses on the pilot body block 

(F)� (Note the orientation of the body in relation to the orifice 

block)�

3c�   Attach orifice block (K) and gauge manifold (N) to the pilot 

body block (F) with four 1/4 - 20 x 2 1/2-inch stainless steel 

hex head cap screws (J) by lining it up with roll pins (M) in pilot 

body block (F)

Step 4. Test the pilot body block (F) for leakage� Using 1/4-inch NPT 

plugs, plug the orifice block ports (K) and the gauge manifold (N)�

4a�   Connect a pressure source to the orifice block (K) as shown� 

Use approximately 100 psig for testing�

4b�   With the pressure source activated, soap test around the 

balanced valve assembly (C) on both the bottom and the top 

of the pilot� Place a bubble on the exhaust port and check for 

leakage�

4c�   If any leakage is detected, repeat the assembly procedure 

from Step 1� (vertical cross hole must be blocked with plastic 

plugs in order to check exhaust port)�

4d�   Remove all plugs from all blocks/manifolds [K and N]�