SCHUNK SRU Series How to use

Short manual
Changing the stop on the SRU withshock absorber adjustment
Date: 13.05.2008 1 Dateprinted 19.05.2008
1.Replacing the“old”stopswith“new”stops
(1)Loosen the screwfor disassemblyof the limiting sleeve(Item10).
(These partsarenot needed for the newstops).
(2)Loosen the clampfor the stops byunscrewing the screw(Item35).
(3)Disassemblythe stops Aand B.
(4)Disassemblethe shock absorbersbyremoving the safetyring.
(5)Removeall fitting disks fromthe hole.
(6)Mount the newshock absorbersaccording tothe information inthe tableon page 2.
You can mount and adjust the newstops.
Note
On90°unitsit isimportant tonotethe lengthof the respectivestop.
Stop A
Stop A
Stop B
Stop B

Short manual
Changing the stop on the SRU withshock absorber adjustment
Date: 13.05.2008 2 Dateprinted 19.05.2008
Unit
Shockabsorber Shock absorber
20.1 WP-M0,25-356
(IDNo.: 9941662) ±0,05 -
20.2 WP-M0,25-356
(IDNo.: 9941662) ±0,05 MC150 MH2 (ID-Nr.: 9701000) see measuring instructions ±0,1
25.1 WP-M0,25-356
(IDNo.: 9941662) ±0,05 -
25.2 WP-M0,25-456
(IDNo.: 9941661) 17,5 ±0,05 MC150 MH2 (ID-Nr.: 9701000) see measuring instructions ±0,1
35.1 MC225 MH2
(IDNo.: 9701013) ±0,1 -
35.2 MC225 MH2
(IDNo.: 9701013) ±0,1 MC225 MH2 (ID-Nr.: 9701013) see measuring instructions ±0,1
40.1 WP-M1,0-166
(IDNo.: 9941268) 17,5 ±0,05 -
40.2 WP-M1,0-166
(IDNo.: 9941268) 17,5 ±0,05 MC600 MH2 (ID-Nr.: 9701005) see measuring instructions ±0,1
50.1 WP-M1,0-166
(IDNo.: 9941268) 17,5 ±0,05 -
50.2 WP-M1,0-166
(IDNo.: 9941268) 17,5 ±0,05 MC600 MH2 (ID-Nr.: 9701005) see measuring instructions ±0,1
60.1 WP-M1,0-166
(IDNo.: 9941268) 17,5 ±0,05 -
60.2 WP-M1,0-456
(IDNo.: 9941634) 17,5 ±0,05 MC600 MH2 (ID-Nr.: 9701005) see measuring instructions ±0,1
17. Jan
see
measuring
instructions
Shock absorberutilizationand installation dimensions
Basic VM
Shock abs. projection (h) Shock abs.projection (h)
Measuring instructions
1.Measurethe projection (x) of the shock absorber.
2.Measurethe projection (y) of the compressed shock absorber plunger.
3.Calculateshock absorber stroke (h) .
h=x-y-0.2mm
4.Adjust shock absorber projection (h).
Fittingdisks

Short manual
Changing the stop on the SRU withshock absorber adjustment
Date: 13.05.2008 3 Dateprinted 19.05.2008
2.Adjusting thestops
(1)Use an Allen wrench toloosen the screw(item55) about one revolution.
(2)Applyair pressuretoair connection B. Unit rotates tostop A
(base setting 0°).
(3)Set the desired end position byturning the stop A.
Important!
Donot adjust the end stops byturning the axialface hexagon socket or the shock ab-
sorber (VMversions). Thiscan cause the componentstocomeapart.
- Use an open-end or box-end wrench (SRU 20: 19, SRU 35-60: 32), placing it on
the hexagon nut of the stop cover (see illustration above).
(4)Bleed air connection Aand applyair toconnection B; then check the end position. Ad-
just the end positions if necessary.
(5)Bleed air connection Band applyair toconnection A. Unit rotates tostop B(base set-
ting 180°).
(6)Set the desired end position byturning the stop B.
(7)Tighten the screw(item35) securely.
(SRU 20 –40: 10 Nm, SRU 50 –60: 24 Nm)
(8)Rotateseveraltimes tocheck the correct setting of the end position Adjust the end
positions if necessary.
Stop B
Stop A

Short manual
Changing the stop on the SRU withshock absorber adjustment
Date: 13.05.2008 4 Dateprinted 19.05.2008
3.Adjustmentshock absorberstroke
(1)Removethe end caps (item104).
(2)Toadjust the shock absorption inthe end position, loosen the nut (item101) at the
stop Awithawrench (SRU 20/25: 14, SRU 35-60: 24), providing counter support for
the stop bolt (item79 or 89) withan Allen wrench.
(3)Screwing the stop bolt (item79/89) out shortens the damping stroke by1.0mm per
revolution for the SRU 20/25 and 1.5mm per revolution for the SRU 35-60.
(4)Check the damping effect byrotating the loaded unit.
(5)Nowturnthe stop bolt back until the unit moves gentlyintothe end position, without
impact.
(Thissetting isdependent on the load)
(6)Tighten the nut (item101), providing counter support for the stop bolt (item79 or 89)
withan Allen wrench (SRU 20/25: 5, SRU 35/40: 6, SRU 50/60: 8).
Important!
The maximumadjustment range is2.5mm for the SRU 20/25 and 3.0mm for the SRU
35-60. Abovethese ranges, the air overflowstoprotect the unit.
Stop B
Stop A

Short manual
Changing the stop on the SRU withshock absorber adjustment
Date: 13.05.2008 5 Dateprinted 19.05.2008
4.Replacing ashock absorber
The shock absorbershavealimited life. Therefore, theyshouldbe checked regularly(every2
million cycles) toensurethat theyarefunctioning properly. The shock absorber isoperating
correctlyif the unit moves gentlyintothe end positions. The shock absorbersarespeciallyin-
spected and availableonlyfromSCHUNK.
(1)Loosen the screws(item102).
(2)Removethe cover (Item12).
(3)Removethe safetyrings (Item50) fromthe pistons.
(4)Pull out the shock absorbers(item54) and removeall fitting disks fromthe hole.
(5)Insert the newshock absorbers. Notethe shock absorber projection
(see tableon page 2).
(6)Place fitting disks under the safetyrings so that thereisno play.
(7)Mount the stop cover.
(8)Screwthe stop cover securely.
(9)Check the shock absorption. If necessary, adjust the shock absorption
(see Chapter 3).
Item Designation
9 adjustingsleeve
12 stop cover
41 O-ring
43 O-ring
79 stop pin
101 nut
102 O-ring
103 screw
104 endcap
Item Designation
24 piston
44 cylinder seal
48 guide ring
50 safetyring
52 magnet
54 shock absorber