Trebor 620R Magnum - Manual (Page 22)

PAGE 22 MAGNUM 620R PUMP OPERATION / MAINTENANCE MANUAL
ATTENTION: Threads should be snug. Do not over tighten.
 Thread muffler assembly into head using 3/4” pin tool.
4.8.b Pump Assembly
NOTE: Check sleeves that fit too tightly for easy installation should be placed in
a freezer prior to assembly to assist insertion. Body must be upside down with
check port extending over a table edge so that parts remain assembled during
insertion of sleeves. (See Figure 4-5.)
Figure 4-5

Insert suction sleeve, check ball and O-ring carefully into check bore.
NOTE: The Suction Sleeves have a shoulder diameter larger than their body
diameter. Additionally the Suction Sleeves when compared to the Discharge
Sleeves have a thicker top region which acts as a robust contact point for the O-
rings.

Repeat insertion process with the discharge sleeve, check ball and O-ring.

Repeat process for second check bore.

Replace seals and tighten check bore caps to 45in-lbs.
 Install seal and damper plug using 3/4” pin tool, torque to 45in-lbs.