Specifications

MAINTENANCE
550 Gas/LPG 330650 (8--01)
52
CYLINDER HEAD
CYLINDER HEAD BOLT TIGHTENING --
CONTINENTAL ENGINES
(For machines below serial number 006409)
A three-stage torque procedure should be used
when reassembling the cylinder head. The
cylinder head cap screws and risers must be
tightened in the proper sequence after the first 50
hours of operation and after every 400 hours of
operation.
Snug down cap screws and risers in the proper
sequence. Tighten the cap screws and risers to
one-half of the specified value.
Hand torque cold M10 bolts to 50 to 55 ft lb (68 to
75 Nm) and M12 bolts to 80 to 85 ft lb (108 to 115
Nm) in the correct order .
01472
CYLINDER HEAD BOLT TIGHTENING
SEQUENCE -- CONTINENTAL ENGINES
(For machines below serial number 006409)
The cylinder head cap screws and risers must be
re-torqued after the engine is put into operation
and brought up to proper operating temperatures.
To re-torque cap screws, follow the correct
sequence. Loosen one head cap screw or riser at
a time one quarter turn (90 degrees); then
re-torque it to the correct value. Check the valve
tappet clearance.
NOTE: Power wrench torque limit must be held at
least 10 ft lb (14 Nm) below hand torque
specification; then hand torque to the
specifications.
CYLINDER HEAD BOLT TIGHTENING --
GM ENGINES (For machines serial number
006409 and above)
A two-stage torque procedure should be used
when reassembling the cylinder head. The
cylinder head cap screws and must be tightened
in the proper sequence after the first 50 hours of
operation and after every 400 hours of operation.
Install the cylinder head bolts finger tight.
Hand torque the cylindrical head bolts to 90 ft lb
(122 Nm) in the correct order.
10
6
237
95
148
CYLINDER HEAD BOLT TIGHTENING
SEQUENCE -- GM ENGINES (For machines
serial number 006409 and above)
The cylinder head bolts must be re-torqued after
the engine is put into operation and brought up to
proper operating temperatures. To re-torque cap
screws, follow the correct sequence. Loosen one
head cap screw or riser at a time one quarter turn
(90 degrees); then re-torque it to the correct
value. Check the valve tappet clearance.
NOTE: Power wrench torque limit must be held at
least 10 ft lb (14 Nm) below hand torque
specification; then hand torque to the
specifications.
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