OSQB: OSQ with back pressure valve in HT
Place the unit on a work bench.
Dismantling counter pressure valve
1.
Screw out the plug with O-ring (49) using an 8 mm Hex key.
2. Take out the small spring (47) using a hook.
Service Manual
OSQA/OSQB
Disassembly
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Danfoss | July 2016 HN25D293 | AX00000127en-US0101 | 9