Servicing The Oil Pump - Stihl 034 Series User Manual

Install in the reverse sequence.
Note:
Pay special attention to the
following points:
Cut new oil delivery hose to a
length of 74 mm and coat the
ends with oil. Use modified flat
nose pliers (a = 5,5 mm) to fit the
oil delivery hose on the oil pump
nipple.
– Push the oil delivery hose
through the bore in the bar
mounting flange (from the inside
outwards) and allow it to project
about 10 - 20 mm. If the hose
cannot be pushed through on
older machines, drill out the bore
to a diameter of 6.2 mm and
deburr carefully.
58
R=1,5mm
Hold the projecting end with the
modified flat nosed pliers. Now
push home the sleeve with the
modified carburetor screwdriver
(R = 1.5 mm).
– Place oil pump in installed
position. Use modified carburetor
screwdriver to push hose into bar
mounting flange so that it is
recessed about 1-2 mm.
– Insert oil pump mounting screws
and tighten them down firmly
(see "Tightening Torques").
a
11.5

Servicing the Oil Pump

1 2 3 4 3
Always check the suction hose and
pickup body before disassembling
the oil pump.
– Remove the oil pump -
Use a 2 mm drift to drive out the
spring pin (6). Pull the control bolt
(8) out of the housing (5) and
remove the O-rings (7).
Note:
The previous pump has an
adjusting screw which must be
unscrewed clockwise.
Pry the plug (1) out of housing (5)
and remove the pump piston (2)
with spring (4) and washers (3).
Wash all part in white spirit.
Inspect parts for damage and
replace as necessary.
Reassemble in the reverse
sequence.
Note:
Always install new O-rings. Coat
pump piston and worm with grease,
see 13.2, before installing.
034, 036, 036 QS
5
6
7
8
see 11.4.