Trebor 50D Maxim - Manual (Page 17)

MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 17
Figure 4-2

Remove head and check diaphragms for cracks or cuts.

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 su ction 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 using the 3/4” pin tool

Remove seal.
 Unscrew and remove pilot assembly using 3/4” pilot pin tool and seal.
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.