Baker Hughes Spring Diaphragm Actuators 87/88 Series

Replace or repack handwheel bearing size 16 and 23 actuators A. Rotate handwheel to a free position.

B. Remove lock pin (91), cap screw (93), and washer (94) to release handwheel cover (57).

C. Remove pivot pins (33) which engage the handwheel pivot (36) thru the yoke.

D. Remove snap rings (46) and remove lever pin (45) to release complete handwheel assembly.

E. Remove cap screw (97) and end flange (96) to release the handwheel stem (39) from the bearing.

F. Remove snap ring (35) to release bearing (34).

G. Replace or clean to repack the bearing with new grease.

H. Pack bearing (34) with Mobilux No. 2 grease or equal.

I. For remounting, reverse removal procedures from step (F) through (B).;

- The current estimated useful life period for the 87-88 Series Actuator is 25+ years. To maximize the useful life of the product, it is essential to conduct annual inspections, routine maintenance and ensure proper installation to avoid any unintended stresses on the product. The specific operating conditions will also impact the useful life of the product. Consult the factory for guidance on specific applications if required prior to installation.;

Replace or repack handwheel bearing, size 3 actuators

A. Rotate handwheel to a free position.

B. Remove handwheel cap screw (20) and washer (42).

C. Remove handwheel (41) and key (47).

D. Remove one of the two retaining rings (46) which are mounted on lever pin (45).

E. Remove lever pin (45) and secure the handwheel holder (40) in place.

F. Remove the complete handwheel assembly from the actuator.

G. Remove both cover cap screw (20) and handwheel cover (57).

H. Remove retaining ring (35), handwheel pivot (36) and bushing (37) to release the bearing.

Replace or repack handwheel bearing, size 6 and 10 actuators

A. Rotate handwheel to a free position.

B. Remove handwheel cap screw (20) and washer (42).

C. Remove handwheel (41) and lock nut (43).

D. Remove lock pin (91), cap screw (93), and washer (94) to release handwheel cover (57). Remove cover.

E. Remove pivot pins (33) from the yoke which hold the handwheel pivot (36).

F. Remove snap rings (46) and remove lever pin (45) to release handwheel assembly.

G. Turn handwheel stem (39) until it clears traveling nut (40).

H. Remove snap ring (38) and bearing ring (37) to release the handwheel stem (39) from the bearing.

Replacing diaphragm air to close actuator (Model 87), with handwheel

A. Shut off air supply to the actuator, isolate the control process pressure to eliminate the valve plug from moving with spring tension removed.

B. Rotate the handwheel (41) to a neutral position.

C. For size 3 actuator, remove one of the two retaining rings (46) which are mounted on lever pin (45).

D. For size 3 actuator, remove lever pin (45) and secure the handwheel holder (40) in place (see Figures 11 and 12). For all other sizes, let the complete handwheel assembly swing down and out of the way of the top stem connector (4) [stem flange (2) on size 6 actuator].

E. Proceed with the instructions for air to close actuators without handwheel (7.3).;