Emerson Process Management BETTIS G01 - Manual (Page 17)

Bettis P/N 124840E
Revision “B”
Page 13 of 46
2.6.4.2 Unscrew and remove hex flat nut (7-50) from M3 jackscrew assembly (7-40).
2.6.4.3 Unscrew and remove two socket cap screws (7-120) from M3 adapter (7-40).
2.6.4.4 Remove M3 jackscrew (7-40) from M3-SR adapter plate (7-10).
2.6.5 M3 THRUST BEARING DISASEMBLY FROM M3 JACKSCREW ASSEMBLY
2.6.5.1 Remove M3 bearing retainer (5-110) / (7-110) from inboard end of M3 jackscrew
assembly (5-50) / (7-40).
2.6.5.2 Remove needle roller thrust bearing (5-100) / (7-100) from M3 bearing retainer
(5-110) / (7-110).
2.6.5.3 Remove retainer ring (5-90) / (7-90) from M3 jackscrew assembly (5-50) / (7-40).
2.7 EXTENDED STOP BLIND END CAP DISSASSEMBLY
2.7.1 Unscrew and remove hex nut (5-60) from ES stop screw (5-50).
2.7.2 Remove ES stop screw (5-50) from ES blind end cap (5-10).
SECTION 3 - ACTUATOR REASSEMBLY
3.1 GENERAL REASSEMBLY
CAUTION: Only new seals, which are still within the seal’s expectant shelf life, should
be installed into the actuator being refurbished.
3.1.1 Remove and discard all old seals and gaskets.
3.1.2 All parts should be cleaned to remove all dirt and other foreign material prior to inspection.
3.1.3 All parts should be thoroughly inspected for excessive wear, stress cracking, galling and
pitting. Attention should be directed to threads, sealing surfaces and areas that will be
subjected to sliding or rotating motion. Sealing surfaces of the cylinder, tie bars and piston
rod must be free of deep scratches, pitting, corrosion and blistering or flaking coating.
CAUTION: Actuator parts that reflect any of the above listed characteristics should be
replaced with new parts.
3.1.4 Before installation coat all moving parts with a complete film of lubricant. Coat all seals
with a complete film of lubricant, before installing into seal grooves.