Emerson Bettis M18 - M18 Pump Reassembly Instructions

Installation, Operation and Maintenance Manual
VA-DC-000-1879 Rev. 0 April 2021
17
Section 5: M18 Reassembly Instructions
M18 Reassembly Instructions
5.2.3 Install reservoir O-ring (10 - 100) over the lip of bottom end cap (10 - 40).
5.2.4 Install cylinder (10 - 20) over the lip of bottom end cap (10 - 40).
5.2.5 Install reservoir O-ring (10 - 100) over the lip of upper end cap (10 - 10) then install
entire upper end cap assembly (10 - 10) over the lubricated center bar assembly
(10 - 30) and into the cylinder (10 - 20).
5.2.6 Install thread seal (10 - 70) and countersink washer (10 - 60) onto center bar
assembly (10 - 30).
5.2.7 Install and tighten acorn nut (10 - 50) onto center bar assembly (10 - 30).
5.2.8 Apply sealant to breather (10 - 90) and install into upper end cap (10 - 10).
5.2.9 Apply sealant to pipe plug (10 - 80) and install into bottom end cap (10 - 40).
5.3 M18 Pump Reassembly Instructions
NOTE:
Review Section 5.1, General Reassembly before proceeding with M18 pump reassembly.
5.3.1 Install O-ring seals (20 - 20 - 40) into grooves on manifold (20 - 10 - 10).
5.3.2 Install control valve disc (20 - 10 - 290) on manifold (20 - 10 - 10) with flat head
screws (20 - 10 - 330).
5.3.3 Insert spring pin (20 - 10 - 340) onto rotor (20 - 10 - 300) and valve stem (20 - 10 - 280).
5.3.4 Install above assembly into manifold (20 - 10 - 10).
5.3.5 Place thrust bearing (20 - 10 - 370) and bearing washer (20 - 10 - 380) on the back
surface of the rotor (20 - 10 - 300) with the back of the rotor facing up.
5.3.6 Insert spring (20 - 10 - 390) and valve piston (20 - 10 - 310) into back
plate (20 - 10 - 320).
5.3.7 Slightly push above assembly into manifold (20 - 10 - 10) using manual press.
5.3.8 Install back brace (20 - 10 - 130) onto manifold (20 - 10 - 10).
5.3.9 Install ball (20 - 10 - 350) and spring (20 - 10 - 360) and pipe plug (20 - 10 - 210)
onto manifold (20 - 10 - 10).
5.3.10 Install check valves (20 - 10 - 40), check valve (20 - 10 - 270), and orifice check
valves (20 - 10 - 260) onto manifold (20 - 10 - 10).
5.3.11 Install relief valve (20 - 10 - 30) onto manifold (20 - 10 - 10).
5.3.12 Install Polypak seal (20 - 20 - 10), rod bearing (20 - 20 - 30) and rod wiper
(20 - 20 - 20) into the pump cylinder (20 - 10 - 20).
NOTE:
Refer to assembly drawing sheet 3 Detail A for correct orientation for Polypak lips.