User guide

MAGNUM 620R PUMP OPERATION / MAINTENANCE MANUAL PAGE 23
 Install two shaft seals in shaft bore groove with slits 180 apart.
 Thread shaft into push plate until engagement with the shaft shoulder is
achieved. Additionally apply a ¼” turn to ensure proper installation.
 Insert shaft through shaft bore using shaft bullet as shown (This prevents
damage to the TFE shaft seals and prevents dislodgement of shaft seals).
Figure 4-6
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 head 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 head down and place one diaphragm with “V” groove
point away from the body.
 Install poppet and pilot seat into heads, torque pilot seats to 15in-lbs.
 Install head on body hand tight.
 Turn pump over and remove union nut to install diaphragms on other side.
 Repeat diaphragm and head installation.
 Lock body into mounting fixture.
 Using strap wrench, torque heads slowly until heads are oriented into
horizontal alignment of transfer tube holes. See Figure 4-7 with the wrench
at 90° +/- 15° to the nut’s surface as shown.