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J
A
I
C
B
E
F
G
H
K
R
T
M
L
N
S
P
U
Q
V
O
D
A: Head alignment pin / mark
B: Connecting rod
C: Housing
D: Washer
E: Diaphragm support disc
F: Diaphragm
G: Diaphragm clamping disc
with square head screw
H: Allen screw
I: Cap
J: Head cover
K: Square nut
View of the disassembled pump head parts
(fig.: MD 4C VARIO select)
L: Fillister head screw
M: O-ring
N: Valve
O: Valve head
P: Hose nozzle
Q: Connection fastener
with hinged cover
R: Disc spring
S: Clamping bracket
T: Countersunk screw
U: Hose clip
V: Connection tube
This labeling is used throughout the following pages.