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Page Number 21 of 28
2.1B-38008-A01
QLS 311
Form 403074
Installation and Operation Instructions
Optional for metric fittings (not provided in the accessory kits)
Tube fittings, Screw-type or Push-in type for SSV Outlets
1 - Ferrule nut
2 - Cutting ring
3 - Valve body with sealing and ferrule
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Fig. 36 - Check valve, screw-type (option) for steel and plastic
tubes
For high-pressure plastic hose (option, dia. 8.6x2.3mm)
use check valves type A with reinforced collar and
smooth flange.
A - Check valve with reinforced collar
B - Check valve with knurled collar
1a - Reinforced collar
2a - Knurled collar
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Note: Use high pressure plastic hoses on construction
machines or agricultural machines . In such cases the check
valves of the divider blocks must have a reinforced collar and
a smooth flange.
Fig. 37 - Different types of check valves, push-in type
Important:
Connect only high-pressure plastic hoses
(ø 8.6x2.3 mm) with threaded sleeve and hose studs to the
check valves with reinforced collars.
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Fitting the threaded sleeves and hose studs on the
high-pressure plastic hose
Screw the threaded sleeve (item 1 Fig. 39) counterclockwise
onto the high-pressure plastic hose (2) until the illustrated
dimension of 11 mm (0.43 in.) is reached. Then screw the
hose stud (3) into the threaded sleeve (1).
Important:
Oil parts before screwing the parts 1 and 3 together.
1 - Threaded sleeve
2 - High-pressure plastic hose
3 - Hose stud
Fig. 38 - Check valves with reinforced collar and hose stud
Fig. 39 -Preassembly of the threaded sleeves and hose
studs on the high-pressure plastic hose
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