Gasboy Blackmer GDP - Manual (Page 9)

MDE-4096C Blackmer® Global Dispenser Pump Operation, Maintenance and Kit Installation Manual · April 2008 Page 9
Maintenance
3 Remove the plug (11) on the lower right face of the head (9). Fluid will be emptied by
removing this plug. Fluid must be properly contained during draining procedure.
Note: Pump contains up to 0.5 liters of fluid. Do not use this port to monitor system pressure.
4 If sump drainage is desired, remove the plug (11) near the mounting hole on the left side of
pump casing (1).
5 Manually turn the pump pulley counterclockwise (CCW) to aid in fluid removal.
6 Properly dispose of all fluid drained from pump.
7 After pump is drained, replace all plugs (11) using a non-hardening pipe sealant.
Note: Do not use Teflon tape.
Strainer/Check Valve Removal
Check valves (if equipped) should be replaced only if pump is experiencing frequent prime
loss, indicating that the check valve is not functioning. Check valve should be installed when
tank check valve is not available. Always use strainers with or without check valves. Strainer
must be kept clean to ensure proper operation and pump life.
To remove the strainer/check valve, proceed as follows:
1 Lower pump fluid level by removing the plug (11) located at the right of the strainer cover and
rotating the pump shaft counterclockwise (CCW) approximately 10 turns (see
Figure 2 on
page 10 ).
Note: Removing the plug allows air to enter.
2 Remove the three strainer cover screws (21).
3 Remove the strainer cover (19). Inspect cover O-Ring (18) for damage. If damaged, discard
O-Ring and replace with new O-Ring.
4 Carefully pull out strainer (17). Keep strainer in a horizontal position to avoid contaminating
pump with strainer debris. It may be necessary to use a small tool to gently hook the inside of
the metal strainer end cap.
5 If equipped, remove the inlet check valve assembly (16). Inspect for cracked or otherwise
damaged O-Rings. Replace if damaged.
6 Lift dome strainer (25) out from the bore located behind the check valve assembly. Inspect
strainer for damage. Clean and/or replace, if necessary.