Gasboy Blackmer GDP - Manual (Page 16)

Page 16 MDE-4096C Blackmer® Global Dispenser Pump Operation, Maintenance and Kit Installation Manual · April 2008
Maintenance
8 Alternating between the four screws closest to the shaft, draw in the head approximately one
turn on the screw at a time in order to keep the head parallel to the casing.
Notes:1) It is recommended that you tighten alternately opposing bolts on the other side of the
cover instead of tightening the adjacent bolts.
2) Screws will become very tight if faces are not kept parallel. If necessary, return to
step 3 and check to ensure that the cartridge pin is still aligned with the hole.
9 Once the head is fully drawn in, torque the four screws to 200 in. lbs (23 Nm).
10 Before tightening the remaining head screws, check that the pump shaft turns freely and
uniformly. If so, tighten the remaining screws to 200 in. lbs (23 Nm) and check that the pump
shaft turns freely and uniformly.
11 Reinstall inlet check valve, strainer, and PCV as per previous instructions.
12 Reinstall belt and pulley (see step 1 on page 32 ).
13 Purge the unit of air and check for leaks.
Sump Float Removal
Pump will have poor suction or sump overflow if sump float mechanism is worn or damaged.
To remove the sump float, proceed as follows:
1 Drain the pump by following the procedure pertained in the section “Draining Pump” on
page 8 .
2 Remove the pump from the dispenser per dispenser installation instructions.
3 Remove the ten sump cover screws (5) (see Figure 8 on page 17 ).
4 Lift off the sump cover (4) and gasket (3). Inspect the gasket and replace, if worn or damaged.
5 The sump return float mechanism should operate freely. At full down position, the float valve
should center and seat against the rubber seal surface. If it does not seat, or parts are worn or
damaged, remove the sump float assembly and replace.
Notes:1) The sump overflow float mechanism (if present) should operate freely. The float valve
should center and seat against the rubber seal surface when float is lifted straight up.
2) Either the sump float assembly (2) or the sump overflow float mechanism (23) can be
removed by removing the two sump base mounting screws (24).