Stihl 088 Owner's Manual page 46

• Use a 2 mm (5/64") drift to drive out
the spring pin (1).
• Pull out the control bolt (2).
• Remove the 0-rings (3).
• Pry the plug (4) out of the housing.
• Take out the pump piston (5) with
spring (6) and washer (7).
• Remove the shaft seal (8).
• Pull out the worm (9).
- Wash all parts in white spirit.
Inspect the parts for damage and
replace as necessary.
Reassemble in the reverse sequence.
- Always install new O-rings.
- Coat pump piston and worm with
grease, see 11.2, before installing.
STIHL 088
• Place punp housing (1) on base
(2) 1124 893 5200.
- Clean sealing face with a standard
commercial, solvent-based
degreasant containing no
chlorinated or halogenated
hydrocarbons - see 11.2.
- Lubricate lips of shaft seal with
grease - see 11.2.
- Apply thin coating of sealant, see
11.2, to circumference of shaft
seal.
- Slip the shaft seal, open side
facing the pump housing, over
the worm.
• Press home with press plate (1)
1124 893 5100.
• Use press plate (1)
1124 893 5100 to install spur
gear.
46