Gasboy Blackmer GDP - Manual (Page 32)

Page 32 MDE-4096C Blackmer® Global Dispenser Pump Operation, Maintenance and Kit Installation Manual · April 2008
Troubleshooting
Pump Performance Test
1 Check the belt tension.
Belts and pulleys can pinch fingers and hands. Injuries may result.
Avoid placing fingers or hands between belts and pulleys.
Never turn power on to fit belt on pulley.
CAUTION !
Tighter belt tensions can cause pump and motor bearing wear and premature failure.
Loose belts may result in lower flow or excessive belt wear.
The recommended belt tension is 45-55 lbs. (200-244 Newtons).
Notes: 1) The proper belt tension is the lowest tension at which the belt will not slip.
2) Operate the unit with both pressure and vacuum gauges attached. Use an approved
container to collect fuel. Clean spills promptly.
2 Run pump in by-pass with all nozzles closed and record pressure.
3 Run pump in full flow with all nozzles wide-open and record pressure and vacuum. Use a stop
watch to record flow rate in gpm or lpm.
4 If necessary, check the pump speed with a rpm photo-tachometer. Blackmer GDP nominal
speed should be approximately 1250 rpm.
Acceptable Pump Range Table
Full Flow - All Nozzles Open
By-Pass-
Nozzles Closed
Pump Configuration Inlet Vacuum
inHg/cmHg
Discharge
Pressure
psi/bar
Flow Rate
gpm/lpm
Discharge Pressure
psi/bar
One Pumping Unit per Hose
Standard Flow 3-8 / 7.6-20.3 15-30 / 1.0-2.1 10-13 / 37-50 20-35 / 1.3-2.4
High Flow 3-8 / 7.6-20.3 25-40 / 1.7-2.8 18-24 / 68-90 28-45 / 1.9 -3.1
One Pumping Unit per Two Hoses
Standard Flow 3-8 / 7.6-20.3 20-35 / 1.3-2.4 17-20 / 64-76 22-38 / 1.5-2.6
Notes:
1. Pressures, vacuum and flow will vary depending upon installation factors, fuels and hardware configurations.
2. For UHF pump ranges, contact Gilbarco.