
Bettis P/N 126858
Revision "F"
Page 9 of 15
4.2.9
If required for replacement or maintenance remove check valve (10-120) from pipe tee
(10-50).
4.2.10 Remove elbow (10-90), pipe tee (10-50), and pipe nipple (10-40).
4.2.11 Remove Thread Seal (10-80) and washer (10-75) from upper end cap (10-10).
4.3
M11 PUMP DISASSEMBLY INSTRUCTIONS
NOTE: Review Section 4.1 M11 Pressure Relief Instructions before proceeding with M11 pump
disassembly.
4.3.1
Place the M11 control knob (20-320) in the Auto position (middle position). NOTE: Control
knob (20-320) is located in front and at the bottom of the M11 pump manifold (20-10).
NOTE: Using a means of capturing the hydraulic fluid that will be lost during the following steps, i.e.
a bucket, tub, large container, etc.
4.3.2. Using a standard 1/4” Allen wrench remove o-ring plug (20-270) from the left side of the
manifold (20-10).
4.3.3
Place the M11 control knob (20-320) in the Manual position.
4.3.4
Refer to assembly drawing sheet 2. To remove the check valve (20-40) from the manifold
(20-10) move the pump handle to the up position and using a fast motion move pump
handle down. Be ready to catch the check valve, as pulling the pump handle down will
cause the check valve to come out of the manifold under pressure. There will be further
fluid lost when the check valve (20-40) is removed.
4.3.5
Refer to assembly drawing sheet 1. Remove all the M11 pump assembly piping - male
connector (40), and Tubing (50).
NOTE: If the M11 pump is equipped with Auto Reset then do steps 4.3.6 and 4.3.7 and refer to
Auto Reset drawing 135978. If not equipped with Auto Reset skip steps 4.3.6 and 4.3.7.
4.3.6
Remove male swivel elbow (40-20) from Bimba Cylinder (40-90).
4.3.7
Remove two socket cap screws (40-10) from bracket (40-50) and manifold (20-10).
4.3.8
Refer to assembly drawing sheet 1. Remove the four socket cap screws that retains the
mounting bracket (30-90) to actuator housing and remove M11 pump assembly/bracket.
4.3.9
Refer to assembly drawing sheet 1. Remove four countersunk socket flat screws (30-100)
that mounts mounting bracket (30-90) to pump manifold (20-10).