Bobcat 741 - Page 219

VALVE SPRING, RETAINER AND STEM SEAL (With A
The Cylinder Head Installed) (Cont'd)
A WARNING
Be sure piston is at top dead center or bottom
dead center before applying air pressure. If not
the engine can turn and cause injury.
W-2264-0897
Compress the valve spring, and remove the valve spring,
retainer
locks. Release the spring compressor remove
the
valve spring, rotator, retainer and the valve stem to
seal.
Install The Valve Spring
Install a new seal over the valve stem. Two types are
used.
Early engines use an umbrella type (Item 1) [A].
Later production engines use
pedestal type which fasten
the
valve stem guide (Item 2) [A].
Install the valve spring and retainer on the valve stem.
Compress the
valve spring Put the valve spring retainer
locks in the valve stem grooves and release the spring at
a
slow rate to engage the locks in the retainer. Remove
the air hose and adapter.
Put oil on both ends of the push rods and install the
pushrods
in the correct bores. Install the rocker shaft
assembly to the cylinder head, put the push rods on the
adjustment screws. Tighten the
bolts evenly to
specifications.
Adjust the
valve clearances to specifications.
Install the rocker cover.
Install the spark plugs and connect the wires to the spark
plugs in the correct firing order.
Disconnect the wires from the spark
plugs and remove
the rocker cover.
Make a second adjustment
of the valve clearances (hot)
to specifications.
Install the rocker cover with a new gasket and tighten the
fastening screws to specification.
Put the spark plug wires in the rocker cover fastener and
connect them to the correct spark
plugs.
Revised Oct. 97
-7B-26-
8-07298
741, 742, 743, 7430S Bobcat Loader
Service
Manual