Install Piston And Connecting Rod; Install Camshaft - Briggs & Stratton 405777 Series Manual

INSTALL PISTON AND CONNECTING ROD

Note: Install #1 piston and connecting rod first.
1. Oil piston rings, piston skirt, and compress rings with
Ring Compressor Tool #19070, Fig. 2.
a. Place piston and ring compressor upside down on
bench with projections on compressor facing up.
b. Tighten ring compressor evenly until rings are fully
compressed.
c. Then loosen ring compressor very slightly so that
compressor can be rotated on piston skirt while
holding connecting rod, Fig. 2.
2. Lubricate cylinder bores and crankpin and rotate crank-
shaft until it as at bottom of stroke.
3. Install #1 piston with arrow towards flywheel side,
Fig. 3.
a. Push piston down by hand until connecting rod is
seated on crankpin.
4. Assemble connecting rod cap to rod with match marks
aligned, Fig. 4.
a. Torque screws to 100 in. lbs. (11.0 Nm).
5. Rotate crankshaft two revolutions to check for binding.
Rod should also be free to move sideways on crankpin.
Repeat for #2 cylinder.
Note: The number 1 on #1 connecting rod and the
number 2 on #2 connecting rod must be facing
PTO side.
Important: Failure to use a torque wrench can result in
loose connecting rod screws causing breakage or tight
connecting rod screws causing scoring.
INSTALL CAM SHAFT
Lubricate tappets, cam shaft journals and lobes with
engine oil. Assemble timing gear to crankshaft.
1. Install tappets.
2. Align timing marks on cam shaft and crankshaft gear
and install cam shaft, Fig. 5.
Lubricate thrust washer, governor gear and governor
cup and assemble to shaft.
3.
2
TSM
PROJECTIONS
TOOL #19070
Fig. 2 − Compressing Rings
ARROW TOWARD
FLYWHEEL SIDE
FLYWHEEL SIDE
ARROW
Fig. 3 − Installing Piston And Connecting Rod
Fig. 4 − Torque Connecting Rods
Fig. 5 − Installing Camshaft
P.T.O.
SIDE
TIMING
MARK
TIMING
MARK