Reassembly; Cylinder Reassembly - Tecumseh SPECTRA 37 Service And Repair Manual

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6. REASSEMBLY

a) GENERAL
Reassembly should be carried out in the following order.
After thoroughly cleaning all parts, position crankcase on
bench (Fig 42). If replacement of flywheel side oil seal is
necessary refit at this point.
b) CYLINDER
Cylinder with aluminium bearings (HTB, HSB and all
vertical crankshaft engines)
Lubricate flywheel side bearing and install crankshaft with
big end journal towards cylinder bore.
Cylinder with needle bearings (HBL 20-30-35-40)
Replacement of bearing. The needle bearing can be
removed with the aid of special tool 88841026 (Fig 43)
and a replacement bearing fitted using tools 88841531-
670272 (Fig 44).
Lubricate flywheel side bearing and install crankshaft with
big end journal towards cylinder bore.
the crankshaft runs in a needle bearing (flywheel side)
and ball bearing (PTO side). The flywheel side crankshaft
main bearing journal is hardened for use with needle
bearings. It is therefore essential that the correct
crankshaft is ordered and not confused with HTB or HSB.
Cylinder with ball bearing (BH)
Heat cylinder to 80-100 degrees C and drive out bearing.
Bearing has a locating clip around the outer race, and
must be driven into the crankcase. Use reverse procedu-
re for replacement.
The bearing in the cylinder cover does not have the locating
clip, but sits against a register in the cover. Heat the cover
to 80-100 degrees C and drive bearing out of cover from
the outside inwards.
Use reverse procedure for replacement.
Always refer to parts lists for correct identification.
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Fig. 42
Fig. 43
Fig. 44