Maintenance, upkeep – ROHM OVUSHH - hydraulic operated duble piston cylinders User Manual
Page 17
Size
120/80
120/80
140/80
160/80
Piston stroke
45/8
75/8
45/8
45/8
Dimensions E, F, G, H are referring to the machine, please state when ordering.
Ident-No. (without cylinder adaptor plate)
419724
419727
419725
419726
A
168
168
188
208
B
248
278
248
248
Diam. piston 1
C
1
120
120
140
160
Diam. piston 2
(Reduction possible down to 50 mm)
C
2
80
80
80
80
Stroke piston 1
(Red. possible down to appr. 10 mm)
D
1
45
75
45
45
Stroke piston 2
(Enlargement possible up to 45 mm)
D
2
8
8
8
8
min.
40
10
40
40
max.
85
85
85
85
min.
22
--8
22
22
max.
30
0
30
30
min.
37
7
37
37
max.
82
82
82
82
A
cm
2
93,5
93,5
134,5
181,4
B
cm
2
103,7
103,7
144,5
191,6
C
cm
2
45,4
45,4
45,4
45,4
D
cm
2
46,1
46,1
46,1
46,1
1
daN
3800
3800
5600
7400
2
daN
1800
1800
1800
1800
Max. permissible speed
min
--1
5000
5000
5000
5000
1
l
0,86
1,42
1,26
1,67
2
l
0,1
0,1
0,1
0,1
Moment of inertia J
kgm
2
0,13
0,14
0,18
0,25
Weight approx.
kg
42,2
44,7
46,5
51,3
K
1
K
2
Q
Piston 1
Piston 2
Piston area
Eff. draw bar pull (F=40 bar)
Volume for full double stroke
6. Maintenance, upkeep
6.1 Maintenance:
The through-hole type dual piston cylinder with distribu-
tor requires no regular maintenance as long as a pulsa-
ting oil pressure will be supplied to the both outer inlets
(nomally inlet “A” and “C”) during rotation. Oil pressure
min 5 bar. Pulse duration approx. 5 seconds, dead time
up to 15 mins.
6.2 Upkeep:
After 6500 hours of operation or whenever there is a loss
of pressure, remove the cylinder from the spindle and
disassemble it. Clean all parts and check them for wear.
It is generally good practice to replace all sealing ele-
ments or at least those subject to dynamic stress. For
this reason, 1 set of the sealing elements identified in
the parts list and a supply of consumable items should
be stocked at all times.
To reassembly the cylinder, reverse the disassembly
procedure. Make sure that marked parts or parts requi-
ring a specific position are assembled in the intended
position in order to avoid unbalance or malfunctions.
Important: Do not damage seals with tools or sharp
edges.
To keep the cylinder damaged, it is good practice to reba-
lance it after reassembly. At speeds over 3000 rpm, this
precaution is a ”must”.
On request, reassembled cylinders will be rebalanced
against charge at the Röhm factory or on the customer’s
premises by one of our fitters with the aid of a portable
balancing machine.
Reassembled cylinders should at least be checked for vibra-
tions which were not present before the cylinder was disas-
sembled.
This is all the services which the cylinder requires.
We strongly recommend to have any maintenance work
carried out by the manufacturer
to ensure operational safety
and guaranteed function.
17
Anschlüsse
Connections
Anschlüsse
Connections
roehm_bedienung 04.08.2005 14:04 Uhr Seite 17