5.2.4 Piston rod gland
The piston rod gland keeps the dirty cylinder oil in the scavenge space and thus prevents
contamination of the bearing oil in the crankcase. Also, the piston rod gland seals the scavenge
air from the crankcase.
Use the sample valve to get system oil samples regularly. The analysis of this oil gives data
about the quality of the cylinder lubrication.
Do regular checks of the leakage oil drain to make sure that oil flows freely. This prevents the
risk of fire.
Fig 5-10 Piston rod gland (generic)
001
002
003
004
006
005
007
011
010
009
008
Legend
001 Scraper ring (4-part) 007 Oil drain
002 Housing (2-part) 008 Ring support (3-part)
003 Relief opening 009 Scraper ring (3-part)
004 Neutral space 010 Gasket (4-part)
005 Cylinder jacket 011 Tension spring
006 Support
During operation, the two scraper rings (001, Figure 5-10) remove dirty oil from the piston rod.
The dirty oil flows through oil bores and collects in the bottom of the scavenge space. The dirty
oil flows out through the leakage oil drain on the fuel side.
The two gaskets (010) prevent the release of scavenge air into the crankcase.
The oil that flows through the relief openings (003) into the neutral space (004) flows into the oil
drain.
The ring supports (008) hold the scraper rings (009) in position. The scraper rings (009) remove
bearing oil from the piston rod. This bearing oil flows through the oil drain (007) to the
crankcase.
The tension springs (011) push the scraper rings (009) and (012) against the piston rod.
X92DF
AA00-2303-00AAA-043A-A
Operation Manual Piston rod gland
Winterthur Gas & Diesel Ltd.
- 164 - Issue 002 2020-08
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