6
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series F11
Bulletin HY30-5503-M1/UK
Operational Check
The general condition of the unit can be established by checking the drain flow. Remove the
drain line and keep the drain port above a suitable container. Run the unit at normal speed
and pressurize the system to 150 - 200 bar (2000-3000 psi).
Measure the drain flow for one minute; if it exceeds the maximum figures shown below, the
unit is worn or damaged internally and should be replaced or repaired. Also, check for lea-
kage at the shaft seal and between the bearing and barrel housings.
Drain Flow
Series
Normal
(l/min)
Normal
(gpm, US)
Max
(l/min)
Max
(gpm, US)
F11-5
0.2
0.05
1.0
0.26
F11-6
0.2
0.05
1.0
0.26
F11-10
0.3
0.08
1.5
0.4
F11-12
0.3
0.08
1.5
0.4
F11-14
0.3
0.08
1.5
0.4
F11-19
0.4
0.1
2.0
0.55
