Trebor 50R Maxim - Manual (Page 17)

MAXIM 50R PUMP OPERATION / MAINTENANCE MANUAL PAGE 17

To remove diaphragms, slit diaphragm with a sharp knife and pull the
diaphragms from the grooves. (Do not pry on diaphragm seal groove, as
this will damage the sealing surface.)

Unscrew push plate from the shaft in a counter-clockwise direction. Pull
other push plate and shaft from pump body.
CAUTION: Following disassembly, parts should be thoroughly washed
and be free from chemical residue for handling purposes.
4.7.a Body Disassembly

Remove suction plugs and seal on bottom of pump body using 1” pin tool.
 Remove suction seat using 1” pin tool.

Remove ball and O-ring.
 Unscrew suction check using 1” pin tool turning it counter-clockwise.

Remove second set of O-rings and balls and pull out discharge check cage.

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 cap u sing the 3/4” pin tool

Remove seal and pilot poppet.
 Unscrew and remove pilot seat using 3/4” pilot pin tool.
4.7.c Control Base Disassembly

Unlock control base from quick-change mount by pulling out lever on front of
base to unlock mount. Then slide base back until it stops. Lift base off
mount.

Using pH test strips evaluate whether base has any contamination in air
passages especially the muffler area. If present, neutralize using best
methods prior to disassembly.

Unscrew and remove muffler assembly from base using the
1”pin tool.

Unscrew and remove the shuttle cap and seal.

Remove spool assembly from detent adapter.

Remove detent legs and detent ring from spool.
 Unscrew detent adapter from base using 3/4” pin tool.

Do not remove the shuttle sleeve from the shuttle bore.