Oil Pump; 9.3.1 Removing And Installing; Servicing - Stihl 020 T Service Manual

9.3

Oil Pump

9.3.1 Removing and Installing

• Pull the worm off the crankshaft
stub. Pull suction hose off nipple
on oil pump - see 9.1.
• Take out the oil pump mounting
screws.
• Ease oil pump peg (1) out of plug
(2) and remove the oil pump.
• Remove the plug.
Install in the reverse sequence.
STIHL 020 T
Note: The ignition lead must be
located in the crankcase recess
behind the oil pump.
• Tighten down oil pump mounting
screws to 3.5 Nm (2.6 Ibf.ft).
• Inspect the teeth (1) and bush
(2) of the worm and replace
worm if necessary.
Note: The worm and chain sprok-
must always have the same number
of teeth.
9.3.2

Servicing

Check suction hose and pickup body
before disassembling the oil pump.
• Remove the oil pump - see 9.3.1.
• Drive out the roll pin (1) with a
2 mm (0.08") drift.
• Pull out the adjusting screw (2) and
remove the 0-rings (3).
• Remove the plug (4).
• Take out the pump piston (5) with
spring (6) and washers (7).
• Wash all parts in white spirit.
Inspect the parts for damage and
replace as necessary.
Assembly is a reversal of the
disassembly sequence.
Note: Always install new 0-rings.
Lubricate pump piston and worm
with grease, see 11.2, before
installing.
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