Trebor 50U Maxim - Manual (Page 20)

PAGE 20 MAXIM 50E/U PUMP OPERATION / MAINTENANCE MANUAL
Figure 4-4

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 between diaphragms, with “V” groove point toward the body.

Install head on body. Note tab alignment and orientation of transfer tube
ports in head.

Install union nut on pump while gently pressing down on the head to engage
tabs in head and body, spin union nut down hand tight.

Turn pump over and remove union nut to install diaphragms.

Repeat diaphragm, head and union installation.

Lock body into mounting fixture.

Using strap wrench, torque union nuts slowly to 75 ft-lbs with the wrench at
90° +/- 15° to the nut’s surface as shown.
Figure 4-5