4
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series F11
Bulletin HY30-5503-M1/UK
6
8
Design
Series F11 pumps/motors consist of a rotating group contai-
ned in a split housing. Spherical pistons (1) with laminated
piston rings (2) operate at a 40° angle relative to the shaft
(3). Series F11-5 through -78 employ five pistons, series
F11-110 and -150 seven, and series F11-250 nine pistons.
As the shaft turns, the pistons are driven in a reciprocating
movement in the cylinder barrel (4). When the unit is used
as a pump, the oil passes from the inlet port to the cylinder
barrel and is then forced to the outlet port through the pum-
ping action of the pistons.
A spring device (a retaining ring, a leaf spring, or Belleville
washers) maintains the barrel against the valve plate (item 5,
F11-5 through -150) or the end cap (item 7, F11-250). A ring
gear (6) on the shaft meshes with the corresponding teeth of
the barrel (4) so that the cylinder barrel always rotates at the
same speed as the shaft (3). The shaft is supported by two
heavy duty tapered roller bearings (8).
5
4
1
3
2
6
8
7
4
2
3
1
Series 250
Series 5 through 150
Gear Backlash
F11-005 through F11-110
0.05 - 0.20 mm
F11-150 through F11-250
0.10 - 0.30 mm
F11-005
25.0
F11-010
31.3
F11-019
37.5
F11-028
42.0
F11-039
47.5
F11-058
55.0
F11-078
62.5
F11-110
65.6
F11-150
75.0
Frame size
mm
"R"
