Installing Oil Tank Vent Valve; Removing The Worm; Removing The Oil Pump; Removing The Hose - Stihl MS 500i Service Manual

14.3

Installing Oil Tank Vent Valve

7
Insert valve (7) from outside in the crankcase bore
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(arrow).
Use a 6 mm punch to drive home the valve until
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distance 'a' is 1 mm (0.04 in).
Fit the side plate, @ 12.3.
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Fill up with oil.
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Close the tank cap.
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14.4

Removing the Worm

Preparations, @ 3.1.
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Open the tank cap.
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Drain the oil tank into a suitable container.
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Remove the chain sprocket cover.
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Remove the clutch, @ 11.2.
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Pull off the worm (1).
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14.5

Removing the Oil Pump

Remove the worm, @ 14.4.
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Take out the screws (2).
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Remove the oil pump (3).
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Remove the sealing ring (5).
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14.6

Removing the Hose

Remove the oil pump, @ 14.5.
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Remove the brake band, @ 13.2.
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Grip the tab of the hose (4) with flat nose pliers and
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pull it out together with the pickup body (6).
14.7

Removing Pickup Body from Oil Tank

Remove the hose, @ 14.6.
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Pull off the pickup body.
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22
14.8

Installing Pickup Body in Oil Tank

Push the pickup body (6) onto the hose (4) - make
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sure it is firmly seated.
Install the hose (4), @ 14.9.
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14.9

Installing the Hose

7
a
Push the hose (4) with pickup body (6) through the
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housing bore (arrow).
Position the hose (4) so that the tab butts against the
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guide (arrow).
Push home the tab as far as stop.
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If the pickup body (6) is not properly positioned in the
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oil tank: Use hook 5910 893 8800 to re-position the
pickup body (6).
Install the brake band, @ 13.3.
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Install the oil pump, @ 14.10.
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14.10 Installing the Oil Pump

Fit the sealing ring (5).
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Coat sealing ring (5) and connector (8) with press
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fluid.
Fit the oil pump (3) so that the connector (8) engages
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the hose (4) and face (9) locates against the sealing
ring (5).
If the original screws (2) are re-used: Coat threads of
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screws (2) with Loctite 242.
Insert and tighten down the screws (2) firmly.
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Install the worm gear, @ 14.11.
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4
6
5
9
4
8
4
3
MS 500i