22-14
CYLINDER HEAD AND COMPONENTS (Continued)
Six Cylinder 401 B Engines
( Refer to Figure 11 )
Installation
1. Place new cylinder head gaskets (23) on (1 7) and tighten. Torque the
studs, nuts
the engine block.
NOTE Two of the bolt evenly 40 to 45 ft. lbs.
holes in the head gasket are slightly
smaller and act as a guide to position the
head gasket as well as the fire rings.
Regular line-up studs or dowel pins and
tong, Inset A, may be used. These maybe
purchased through the
J.I. Case Co. Ser-
vice Parts Supply or a local Snap-On Tool
dealer under the following part numbers.
Case Part No.
Tong A40952
Dowel A40953
Snap-On Tool No.
CF83-1
CF84-4
2. Install the new fire rings (22) with either
side up.
NOTE The fire rings must be
installed dry.
3. Install the cylinder head (21) and several
bolts and washers (20), finger tight. Re-
move the A40953 dowels using the A40952
tong or guide studs, whichever was used.
Install the remaining cylinder head bolts
and washers (20), also finger tight. Install
new intake manifold gaskets (4) , manifold
(3) , new exhaust manifold gaskets
(7) and
manifolds. Retain with stud nuts finger
tight. Install new water manifold gaskets
(9), manifold (8) and retain with mounting
bolts finger tight.
4. Torque the cylinder head bolts (20) in the
proper sequence as illustrated inlnsetD.
The three recommended torque steps are
70 ft. lbs.,140ft.lbs.and210ft. lbs. Tor-
que the intake and exhaust manifold stud
nuts and the water manifold bolts evenly
25 to 30 ft. lbs.
5. Coat all of the push rods (18) with clean
engine oil and install them in their origi-
nal locations.
6. Install the rocker arm assemblies (18) in
their original location. Make sure all of
the push rods (19) are engaged with the
adjusting screws on the rocker arms. In-
stall the bracket studs (16) and washers
7. Check the clearance at both ends of the
rocker arm shafts. Maintain clearance
between .010" to .030" at each end, Inset
B. Adjust the valve tappet clearance, re-
fer to Pages 22-24 or 22-25.
8. Install the exhaust stack (5) if equipped
and torque the retaining bolts 35 to 42 ft.
lbs.
9. Reconnect the hoses to the thermostat
housing (10) and clamp securely. Make
sure the drain valves are closed and re-
fill the cooling system. Reinstall the air
cleaner system, making sure all connec-
tions are tight. Install the fuel injectors
and fuel lines and bleed the fuel system.
10. Apply clean engine oil to the rocker arm
assembly and start engine. Check that the
rocker arms are receiving lubricating oil.
Operate the engine for approximately one
(1) hour, (under load if possible) to thor-
oughly warm up the engine and seat the
head gaskets.
11. Shuttheengineoff UsingWrenchA42393,
Inset C, which can be purchased through
the
J. I.Case Co.Service Parts Supplyback
off each head bolt individually 1/ 4 turn and
retorque to 210 ft. lbs. in the proper se-
quence, Inset D.
NOTE DO NOT BACK
OFF ALL THE BOLTS AT THE SAME
TIME. Recheck the torque to make sure
all cylinder head bolts have retained the
210 ft. lbs. Recheck rocker arm bracket
stud nuts to retain 25 to 30 ft. lbs. torque.
12. Install new valve cover gaskets (15) and
the valve cover (14). Install new gaskets
(13) with bevel washers (12) and cover
stud nuts (11). Torque nuts 65 to 70 inch
lbs. Do not over torque the stud nuts. In-
stall new breather tube gaskets (2), brea-
ther tube (1) and secure with retaining
screws.
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