Trebor 620R Magnum - Manual (Page 20)

PAGE 20 MAGNUM 620R PUMP OPERATION / MAINTENANCE MANUAL
CAUTION: Following disassembly, parts should be thoroughly washed
and free from chemical residue for handling purposes.
4.7.a Body Disassembly

Remove (2 each) check plugs an d seal on top of pump body using 3/4” pin
tool.

Remove discharge sleeve using sleeve removal tool.

Remove PTFE ball and O-ring.

Remove suction sleeve using sleeve removal tool.

Remove second set of O-rings and balls.

Remove shaft seals from pump shaft seal groove in the center of the shaft
bore using the tip of a razor knife. Take care not to damage the shaft bore.
NOTE: Do not reuse seals.
 Remove damper plug and seal using 3/4” pin tool.
4.7.b Head Disassembly
 Unscrew and remove pilot seat using 3/4” pin tool. Remove poppet.
4.7.c Master Head Disassembly
 Unscrew and remove muffler assembly from base using the 3/4” pin tool.

Unscrew and remove the shuttle cap and seal.

Remove spool assembly from shuttle bore.

Remove detent legs and detent ring from spool.

Do not remove the shuttle sleeve from the shuttle bore.

Remove muffler assembly.
4.7.d Pump Cleaning

Gently spray clean or dunk rinse all components with DI water to remove any
trace materials remaining after disassembly.
4.8 ASSEMBLY
Prior to beginning assembly, inspect all parts to ensure they are clean and dry.
Wear clean protective gloves. Precautions should be exercised to prevent
contaminating any of the air chamber surfaces with chemicals during handling.
4.8.a Master Head Assembly
Shuttle spool assembly instructions:

Hold shuttle spool (item 1) upright and align slot 1 in detent legs (item 2) with
notch on shuttle spool, see Fig. 1.

Apply pressure upward onto base of detent legs with thumb and index finger,
as shown in Fig. 2.