Trebor 50D Maxim - Manual (Page 20)

PAGE 20 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL

Install discharge check cage into bore making sure small end fits into relief in
bottom of bore.

Drop ball into check cage, then O-ring.
 Install suction sleeve into the bore; tighten using 1” pin tool. Tighten until
engagement with O-ring is achieved, then unthread the sleeve a quarter turn.
Do not over tighten as damage may occur.

Install second ball into check cage, then O-ring.
 Install suction seat using the 1” pin tool. Tighten until engagement with O-ring
is achieved, then unthread the seat a quarter turn.

Install check seal onto check bore shoulder and thread suction plug into bore
using 1” pin tool, torque to 60in-lbs.

Repeat for the second bore.

Install two shaft seals in shaft bore groove with slits 180

apart.

Thread push plate onto main shaft until engagement with the shaft shoulder
is achieved. Additionally apply a ¼” turn to ensure proper installation.

Thread shaft onto shaft insert tool and insert shaft into bore.
Figure 4-5

Remove shaft insert tool and thread second push plate until engagement with
the shaft shoulder is achieved. Additionally apply a ¼” turn to ensure proper
installation.
4.8.c Final Assembly

Reattach pump to assembly fixture.

Attach union nut to one side of pump body (hand tight). Do not install
diaphragm on this step. This will protect body during initial pump assembly.

Remove pump from the assembly fixture.

Place pump body with union nut down and place two diaphragms, removing
all air from b etween diaphragms, with “V” groove point toward the body.
NOTE: Make sure wear disk is on diaphragm surface closest to head.

Install head on body. Note tab alignment and orientation of transfer tube
ports in head.