7.3
Travel pump, PMVO 13S
BOMAG
70
008 921 86
Description of function
Fig. 5
Driven by the engine, the drive shaft rotates and drives the cylinder via a splined connection. The cylinder rotates
with the drive shaft and drives the 9 pistons. The pistons rest with their slipper pads on the sliding face of the
swashing cradle and perform an axial movement. The slipper pads are held on the sliding face and are positively
guided by a retaining device. During a complete rotation of the cylinder block each piston moves through the
bottom and top dead centre back to its initial position. From dead centre to dead centre is performs a full piston
stroke. During this process the flow volume determined by the stroke is drawn in through the control slots in the
valve plate or pumped out. During the suction stroke the hydraulic fluid is drawn into the increasing piston cham-
ber, i.e. it is actually pressed in. On the opposite side the oil is pressed out of the piston bores into the hydraulic
system during the compression stroke.
1
Drive shaft
8
Through drive
2
Piston
9
Valve plate
3
Piston area
10
Top dead centre TDC
4
Piston stroke
11
Bottom dead centre BTC
5
Slipping disc
12
Control slots in suction side of swash plate (for
sense of rotation shown)
6
Adjusting angle
13
Control slot on pressure side
7
Cylinder
Go
to
Discount-Equipment.com
to
order
your
parts
