Trebor 120D Mega - Manual (Page 17)

MEGA 120D PUMP OPERATION / MAINTENANCE MANUAL PAGE 17

Remove sleeves, balls, o-rings and check seat. Do not use excessive force.

Unthread push plate locking screw and push plate from the one side of the shaft.

Remove remaining shaft and push plate from body.

Unthread second locking screw and push plate from shaft.

Unthread shaft bushing locking screw from body.
 Using 2” pin tool, insert pins in shaft bushing locking ring located in the master head
side of chamber and rotate CCW to remove bushing. Then push out bushing from
the slave head chamber side.
4.8 ASSEMBLY
Prior to beginning assembly, inspect all parts to ensure they are clean and dry. Wear
clean, protective gloves.
4.8.a Pilot Valve (Both Heads)
NOTE: Do not use any tools to install the pilot button. Use of tools may damage the
button.

Remove existing pilot button and discard.

Replacement pilot button should be tightened enough that the underside of the head
touches the pilot piston.

No light should be visible between the bottom of the button head and the piston.
Figure 4-2

Slide seal onto pilot valve body until even engagement with the shoulder is reached.
The shoulder is located in the center of the pilot valve body.

Thread the pilot valve assembly into the pilot bore of the head as shown in Figure
4-3. Tighten to 25 in-lbs. Do not over tighten.